67486 + Interview Questions in Secondary School in Physics

1.	Derive the equation of maximum height reached by a thrown upwards object
Answer» ANSWER: PLZ,if it is CORRECT plz rate ⭐me,like me and follow me and mark me as brainlist Explanation: *Therefore if a ball is thrown vertically UPWARDS with 98 m/s velocity, the maximum height reached by it would be = (98 X98 )/(2 x 9.8) meter = 490 meters.*

1.

Derive the equation of maximum height reached by a thrown upwards object

Answer»

ANSWER:

PLZ,if it is CORRECT plz rate ⭐me,like me and follow me and mark me as brainlist

Explanation:

Therefore if a ball is thrown vertically UPWARDS with 98 m/s velocity, the maximum height reached by it would be = (98 X98 )/(2 x 9.8) meter = 490 meters.

Discussion

2.	A body was projected vertically upward at 9.1 m/sec. Determine the time taken to reach the maximum height. Take g = 9.8 m/sec^2 *
Answer» Answer: Who USES Lenny Face?s similar in style to a TYPE of emoticon USED in Japan KNOWN as a . Unlike Western emoticons which are read sideways, like the SMILEY face emoticon, :), k are oriented vertically, as is Lenny Face. Explanation:

2.

A body was projected vertically upward at 9.1 m/sec. Determine the time taken to reach the maximum height. Take g = 9.8 m/sec^2 *

Answer»

Answer:

Who USES Lenny Face?s similar in style to a TYPE of emoticon USED in Japan KNOWN as a . Unlike Western emoticons which are read sideways, like the SMILEY face emoticon, :), k are oriented vertically, as is Lenny Face.

Explanation:

Discussion

3.	Two charges 3×10^-8 C and -2×10^-8 C are located 15cm apart. At what point on the line joining the two charges is the electric potential zero ? Take the potential at infinity to be zero
Answer» Explanation: Let the POTENTIAL be zero at O, then VA + VB = 0, where is electric potential due to charge and is the electric potential due to charge . i.e. i.e. i.e. i.e. 5(0.16 ? X) = 3x i.e. 0.8 = 3x + 5x = ?8x or x = 0.1 m = 10 cm. Now TAKING the second case i.e. when x2 = 0.16 + x, we have or i.e. 5x = 3x ? 0.8 i.e. x = 0.4 m = 0.4 × 100 = 40 cm. i.e. electric potential is also zero at a distance of 40 cm from the charge q1.

3.

Two charges 3×10^-8 C and -2×10^-8 C are located 15cm apart. At what point on the line joining the two charges is the electric potential zero ? Take the potential at infinity to be zero

Answer»

Explanation:

Let the POTENTIAL be zero at O, then VA + VB = 0, where is electric potential due to charge and is the electric potential due to charge . i.e. i.e. i.e. i.e. 5(0.16 ? X) = 3x i.e. 0.8 = 3x + 5x = ?8x or x = 0.1 m = 10 cm. Now TAKING the second case i.e. when x2 = 0.16 + x, we have or i.e. 5x = 3x ? 0.8 i.e. x = 0.4 m = 0.4 × 100 = 40 cm. i.e. electric potential is also zero at a distance of 40 cm from the charge q1.

Discussion

4.	three vectors A,B,C are related as A+B=C,if vector C is perpendicular to vector A and the magnitude of C is equal to the magnitude of A,what will be the angle between vectors A and B?
Answer» Answer: 45 DEGREES draw triangle and solve ACCORDING QUESTION if your not getting then ask here again this will make like a triangle of two equal side

4.

three vectors A,B,C are related as A+B=C,if vector C is perpendicular to vector A and the magnitude of C is equal to the magnitude of A,what will be the angle between vectors A and B?

Answer»

Answer:

45 DEGREES

draw triangle and solve ACCORDING QUESTION if your not getting then ask here again

this will make like a triangle of two equal side

Discussion

5.	A classical atom based on _ is doomed to collapse.
Answer» ANSWER: HYDROGEN EXPLANATION: HYDROGEN IS VERY REACTIVE

5.

A classical atom based on _ is doomed to collapse.

Answer»

ANSWER:

HYDROGEN

EXPLANATION:

HYDROGEN IS VERY REACTIVE

Discussion

6.	What happens in echo when the distance between the source and observer is less than 17m
Answer» Answer: Explanation: Like all waves, sound waves can be reflected. Sound waves SUFFER reflection from the large obstacles. As a result of reflection of sound WAVE from a large obstacle, the sound is heard which is named as an echo. Ordinarily echo is not heard as the reflected sound gets merged with the original sound. Certain conditions have to be satisfied to HEAR an echo distinctly (as a separate sound). The SENSATION of any sound persists in our ear for about 0.1 seconds. This is known as the persistence of hearing. If the echo is heard within this time interval, the original sound and its echo cannot be distinguished. So the most important condition for hearing an echo is that the reflected sound should reach the ear only after a lapse of at least 0.1 second after the original sound dies off. As the speed of sound is 340 m/s, the distance travelled by sound in 0.1 second is 34 m. This is twice the minimum distance between a source of sound and the REFLECTOR. So, if the obstacle is at a distance of 17 m at least, the reflected sound or the echo is heard after 0.1 second, distinctly. Hence, to hear a clear echo, the minimum distance between the reflecting surface and the observer is 17 m.

6.

What happens in echo when the distance between the source and observer is less than 17m

Answer»

Answer:

Explanation:

Like all waves, sound waves can be reflected. Sound waves SUFFER reflection from the large obstacles. As a result of reflection of sound WAVE from a large obstacle, the sound is heard which is named as an echo. Ordinarily echo is not heard as the reflected sound gets merged with the original sound. Certain conditions have to be satisfied to HEAR an echo distinctly (as a separate sound).

The SENSATION of any sound persists in our ear for about 0.1 seconds. This is known as the persistence of hearing. If the echo is heard within this time interval, the original sound and its echo cannot be distinguished. So the most important condition for hearing an echo is that the reflected sound should reach the ear only after a lapse of at least 0.1 second after the original sound dies off. As the speed of sound is 340 m/s, the distance travelled by sound in 0.1 second is 34 m. This is twice the minimum distance between a source of sound and the REFLECTOR. So, if the obstacle is at a distance of 17 m at least, the reflected sound or the echo is heard after 0.1 second, distinctly.

Hence, to hear a clear echo, the minimum distance between the reflecting surface and the observer is 17 m.

Discussion

7.	Theangleofincidenceforarayoflightpassingthroughthecentreofcurvatureofaconcavemirroris(d) at infinityc) at the centre of curvature(2) 90(c) 0°(d) 180°
Answer» ANSWER: 180° Explanation:

7.

Theangleofincidenceforarayoflightpassingthroughthecentreofcurvatureofaconcavemirroris(d) at infinityc) at the centre of curvature(2) 90(c) 0°(d) 180°

Answer»

ANSWER:

180°

Explanation:

Discussion

8.	7. Which of these is an example of reversible change?a. Melting of waxC. Curdling of milkd. Ripening of mangob. Burning of wood
Answer» Answer: the answer to this QUESTION is a) Melting of WAX This is because when wax is melted it only melts CHANGING it's shape but we can again RESHAPE it THANK you ..hope it was helpful and plz fllw me

8.

7. Which of these is an example of reversible change?a. Melting of waxC. Curdling of milkd. Ripening of mangob. Burning of wood

Answer»

Answer:

the answer to this QUESTION is a) Melting of WAX

This is because when wax is melted it only melts CHANGING it's shape but we can again RESHAPE it

THANK you ..hope it was helpful and plz fllw me

Discussion

9.	Fill in the blanks -ड्रोसेरा ..............पौधा है।Drocera is........plant.जड़ में संवहन पूलप्रकार का होता है।In roots vascular bundle is ............. type.t-RNA में रिक्त न्युक्लियोटाइड का त्रिक ............ होता है।(iii)........is present in t-RNA triplet of blank nucleotide.(iv)ग्रीन हाउस की मुख्य गैस है।(iv)Main gas of green house is(v)प्लास्मिड .........कोशिका में होती है।(v)Plasmid occur in............cell.
Answer» रिक्त स्थानों की पूर्ति... FILL in the blanks... (i) ड्रोसेरा ...कीट भक्षी... पौधा है। (i) Drocera is ...INSECTIVOROUS... PLANT. (ii) जड़ में संवहन पूल ...अरीय... प्रकार का होता है। (ii) In roots VASCULAR bundle is ...invariant... type. (iii) t-RNA में रिक्त न्युक्लियोटाइड का त्रिक ...क्षारक समूह... होता है। (iii) ...base group... is present in t-RNA triplet of blank nucleotide. (iv) ग्रीन हाउस की मुख्य गैस ...कार्बन डाइऑक्साइड... है। (iv) Main gas of green house is ...Carbon Dioxide... (V) प्लास्मिड ...जीवाणु कोशिका... कोशिका में होती है। (v) Plasmid occur in ...bacterial cell… cell. ☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼

9.

Fill in the blanks -ड्रोसेरा ..............पौधा है।Drocera is........plant.जड़ में संवहन पूलप्रकार का होता है।In roots vascular bundle is ............. type.t-RNA में रिक्त न्युक्लियोटाइड का त्रिक ............ होता है।(iii)........is present in t-RNA triplet of blank nucleotide.(iv)ग्रीन हाउस की मुख्य गैस है।(iv)Main gas of green house is(v)प्लास्मिड .........कोशिका में होती है।(v)Plasmid occur in............cell.

Answer»

रिक्त स्थानों की पूर्ति...

FILL in the blanks...

(i) ड्रोसेरा ...कीट भक्षी... पौधा है।

(i) Drocera is ...INSECTIVOROUS... PLANT.

(ii) जड़ में संवहन पूल ...अरीय... प्रकार का होता है।

(ii) In roots VASCULAR bundle is ...invariant... type.

(iii) t-RNA में रिक्त न्युक्लियोटाइड का त्रिक ...क्षारक समूह... होता है।

(iii) ...base group... is present in t-RNA triplet of blank nucleotide.

(iv) ग्रीन हाउस की मुख्य गैस ...कार्बन डाइऑक्साइड... है।

(iv) Main gas of green house is ...Carbon Dioxide...

(V) प्लास्मिड ...जीवाणु कोशिका... कोशिका में होती है।

(v) Plasmid occur in ...bacterial cell… cell.

☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼

Discussion

10.	An unchanged capacitors is connestadshow that half theenergy supplied by thebattery is lost as heatwhile changing thecapacitors.
Answer» Explanation: MUJHE iska ANSWER pata nahin hai mujhe mujhe follow karo AUR like kar do

10.

An unchanged capacitors is connestadshow that half theenergy supplied by thebattery is lost as heatwhile changing thecapacitors.

Answer»

Explanation:

MUJHE iska ANSWER pata nahin hai mujhe mujhe follow karo AUR like kar do

Discussion

11.	A car is moving at a velocity of 54 km/h ^-1 . Suddenly brakes are produced a declaration of 6m/^2 , find the distance covered by the car before coming to rest ?Pls answer fast
Answer» ANSWER: U = 54 km/h= 54× 1000/3600= 15 m/s v= u + at 0= 15 + 6.t 6.t = -15 t = -15/6= -5/2 So distance covered in 5/2 seconds S = ut + 1/2 at² = 15× 5/2 + 1/2 × 6 × 25/4 = 75/2 + 75/4 = (75× 3)/ 4 =225/ 4 = 56.25 m

11.

A car is moving at a velocity of 54 km/h ^-1 . Suddenly brakes are produced a declaration of 6m/^2 , find the distance covered by the car before coming to rest ?Pls answer fast

Answer»

ANSWER:

U = 54 km/h= 54× 1000/3600= 15 m/s

v= u + at

0= 15 + 6.t

6.t = -15

t = -15/6= -5/2

So distance covered in 5/2 seconds

S = ut + 1/2 at²

= 15× 5/2 + 1/2 × 6 × 25/4

= 75/2 + 75/4

= (75× 3)/ 4

=225/ 4

= 56.25 m

Discussion

12.	Figure shows two wooden blocks kept on the ground (g = 10ms-2 ). Answer the questions based on figure i) Predict which wooden block will exert more pressure on the ground. Why? ii) Calculate the pressure exerted on the ground by each wooden block. iii) Draw the conclusion from your findings.
Answer» ANSWER: Answer:PRESSURE=force/area Answer:pressure=force/area(a) pressure= (5x9.8)/(0.2x0.1)=2450 pa Answer:pressure=force/area(a) pressure= (5x9.8)/(0.2x0.1)=2450 pa(B) pressure=(5x9.8)/ (0.4x0.2)=612.5 pa Answer:pressure=force/area(a) pressure= (5x9.8)/(0.2x0.1)=2450 pa(b) pressure=(5x9.8)/ (0.4x0.2)=612.5 paExplanation: Answer:pressure=force/area(a) pressure= (5x9.8)/(0.2x0.1)=2450 pa(b) pressure=(5x9.8)/ (0.4x0.2)=612.5 paExplanation: I HOPE it's help you

12.

Figure shows two wooden blocks kept on the ground (g = 10ms-2 ). Answer the questions based on figure i) Predict which wooden block will exert more pressure on the ground. Why? ii) Calculate the pressure exerted on the ground by each wooden block. iii) Draw the conclusion from your findings.

Answer»

ANSWER:

Answer:PRESSURE=force/area

Answer:pressure=force/area(a) pressure= (5x9.8)/(0.2x0.1)=2450 pa

Answer:pressure=force/area(a) pressure= (5x9.8)/(0.2x0.1)=2450 pa(B) pressure=(5x9.8)/ (0.4x0.2)=612.5 pa

Answer:pressure=force/area(a) pressure= (5x9.8)/(0.2x0.1)=2450 pa(b) pressure=(5x9.8)/ (0.4x0.2)=612.5 paExplanation:

Answer:pressure=force/area(a) pressure= (5x9.8)/(0.2x0.1)=2450 pa(b) pressure=(5x9.8)/ (0.4x0.2)=612.5 paExplanation: I HOPE it's help you

Discussion

13.	The pitch of screw gauge is 1mm and there are 100 division on the cap. When nothing is placed between its jaw it read-5divison. When a wire is held their the reading on the main scale is 2mm and 69 division on its cap . If the length of wire is 20cm then find its volumes in mm^3 .
Answer» EXPLANATION: PLEASE MARK me BRANLIST

13.

The pitch of screw gauge is 1mm and there are 100 division on the cap. When nothing is placed between its jaw it read-5divison. When a wire is held their the reading on the main scale is 2mm and 69 division on its cap . If the length of wire is 20cm then find its volumes in mm^3 .

Answer»

EXPLANATION:

PLEASE MARK me BRANLIST

Discussion

14.	Definition of density.
Answer» ANSWER: The density, of a SUBSTANCE is its mass per unit volume. The symbol most often used for density is ρ, ALTHOUGH the LATIN letter D can also be used. Mathematically, density is defined as mass divided by volume: where ρ is the density, m is the mass, and V is the volume.

14.

Definition of density.

Answer»

ANSWER:

The density, of a SUBSTANCE is its mass per unit volume. The symbol most often used for density is ρ, ALTHOUGH the LATIN letter D can also be used. Mathematically, density is defined as mass divided by volume: where ρ is the density, m is the mass, and V is the volume.

Discussion

15.	To form N-type of semiconductor, which type of impurities is added in Si-(a)Tri-valent(b)Penta-valent(c)Both of above(d)None of above two.
Answer» ANSWER: PENTA VALENT IMPURITIES

15.

To form N-type of semiconductor, which type of impurities is added in Si-(a)Tri-valent(b)Penta-valent(c)Both of above(d)None of above two.

Answer»

ANSWER:

PENTA VALENT IMPURITIES

Discussion

16.	ਕਿਸ਼ ਸਾਲ ਵਿੱਚ ਸਰਕਟ ਟੈਨਿੰਗ ਵਿਧੀ ਨੂੰ ਵਿਕਸਿਤ ਕੀਤਾ ਗਿਆ ਸੀ
Answer» ANSWER: PLZ TRANSLATE in ENGLISH

16.

ਕਿਸ਼ ਸਾਲ ਵਿੱਚ ਸਰਕਟ ਟੈਨਿੰਗ ਵਿਧੀ ਨੂੰ ਵਿਕਸਿਤ ਕੀਤਾ ਗਿਆ ਸੀ

Answer»

ANSWER:

PLZ TRANSLATE in ENGLISH

Discussion

17.	5. Draw a labelled circuit diagram for the verification of Ohm’s law. Plot a I-V graph for anohmic conductor. answer fast
Answer» ANSWER: EXPLANATION: this is answer for this QUESTION

17.

5. Draw a labelled circuit diagram for the verification of Ohm’s law. Plot a I-V graph for anohmic conductor. answer fast

Answer»

ANSWER:

EXPLANATION:

this is answer for this QUESTION

Discussion

18.	Establish the mathematical form of newtons second law of motion : F = m a
Answer» ANSWER: FNET = m • a Newton's SECOND LAW of MOTION is a=Fnet.m

18.

Establish the mathematical form of newtons second law of motion : F = m a

Answer»

ANSWER:

FNET = m • a

Newton's SECOND LAW of MOTION is a=Fnet.m

Discussion

19.	2. The least resistance obtained by using 2,4,1and 100 isa) < 100 ohmb)
Answer» ANSWER: option C is correct Explanation: in PARELLEL combination the equivalent resistance should be less than the lowest VALUE resistance.

19.

2. The least resistance obtained by using 2,4,1and 100 isa) < 100 ohmb)

Answer»

ANSWER:

option C is correct

Explanation:

in PARELLEL combination the equivalent resistance should be less than the lowest VALUE resistance.

Discussion

20.	4. If the mean distance of a planet from sun is 4 times the mean distance of earth from sun, then how many years does that planet take to move once around the sun?plz help first legit answer = brainliest
Answer» Answer: The answer is Explanation: Until LESS than 500 years ago, most people THOUGHT Earth was the center of the solar system. By the time Johannes Kepler was born in 1571, people were starting to get the idea that the planets revolve around the Sun. Kepler was the first to explain the puzzling movements of the planets by realizing that their orbits around the Sun are not perfect circles, but instead are ellipses, like elongated circles. Kepler discovered that the motions of the planets could be described very accurately by some simple mathematical formulas. The closer a planet is to the Sun, the faster it travels, and Kepler found a METHOD to connect the average distance of a planet from the Sun to the time it TAKES the planet to make a complete orbit around the Sun. Planetary orbits. Kepler's DISCOVERIES allowed him to figure out how much closer or farther all the planets are to the Sun than Earth is, even though he could not figure out the actual distances. For example, he knew Mars is closer than Saturn, because one Mars orbit takes less than 2 years, while one Saturn orbit takes about 29 years. Although he couldn't use that to calculate their real distances, he did figure out that Mars is about 1.5 times farther from the Sun than Earth is, and Saturn is 10 times farther away than the Sun.

20.

4. If the mean distance of a planet from sun is 4 times the mean distance of earth from sun, then how many years does that planet take to move once around the sun?plz help first legit answer = brainliest

Answer»

Answer:

The answer is

Explanation:

Until LESS than 500 years ago, most people THOUGHT Earth was the center of the solar system. By the time Johannes Kepler was born in 1571, people were starting to get the idea that the planets revolve around the Sun. Kepler was the first to explain the puzzling movements of the planets by realizing that their orbits around the Sun are not perfect circles, but instead are ellipses, like elongated circles. Kepler discovered that the motions of the planets could be described very accurately by some simple mathematical formulas. The closer a planet is to the Sun, the faster it travels, and Kepler found a METHOD to connect the average distance of a planet from the Sun to the time it TAKES the planet to make a complete orbit around the Sun.

Planetary orbits.

Kepler's DISCOVERIES allowed him to figure out how much closer or farther all the planets are to the Sun than Earth is, even though he could not figure out the actual distances. For example, he knew Mars is closer than Saturn, because one Mars orbit takes less than 2 years, while one Saturn orbit takes about 29 years. Although he couldn't use that to calculate their real distances, he did figure out that Mars is about 1.5 times farther from the Sun than Earth is, and Saturn is 10 times farther away than the Sun.

Discussion

21.	According to Rudderford's Atomic Model, electrons inside the atom -(a)remain stationary(b)centralised(c)moves around(d)none of these.
Answer» ANSWER: MOVES AROUND is the answer

21.

According to Rudderford's Atomic Model, electrons inside the atom -(a)remain stationary(b)centralised(c)moves around(d)none of these.

Answer»

ANSWER:

MOVES AROUND is the answer

Discussion

22.	2. How many different resistance combinations are possible with three equal resistors takenall of them together? answer fast
Answer» Answer: There are four POSSIBLE combinations. All THREE in series. All three in PARALLEL. Two series ONE in parallel. One series two in parallel.

22.

2. How many different resistance combinations are possible with three equal resistors takenall of them together? answer fast

Answer»

Answer:

There are four POSSIBLE combinations.

All THREE in series.

All three in PARALLEL.

Two series ONE in parallel.

One series two in parallel.

Discussion

23.	Ek samabahu prizm ekpristho rasmi ki apatan kon 30°.. another pritho ki patisarn kon 40°..so rasmi ki chuti kitni hogi ?
Answer» Answer: The incidence angle is 48.59 degrees and angle of MINIMUM deviation is 36.98 degrees. Explanation: Refracting angle o f a prism A=60∘ and its REFRACTIVE INDEX is n=3/2. What is angle of incidence i to get minimum deviation. Also, find the minimum deviation. Assume the SURROUNDING medium to be air (n=1). We have, Angle of prism, A = 60 Refractive index, n = 3/2 For minimum deviation, the refractive index is given by : n=\dfrac{\sin (A+\delta _m)/2}{\sin A/2}n= sinA/2 sin(A+δ m )/2 \delta_mδ m is minimum deviation $$\begin{lgathered}\dfrac{3}{2}=\dfrac{\sin (60+\delta _m)/2}{\sin 60/2}\\\\\dfrac{3}{2}=\dfrac{\sin (60+\delta _m)/2}{\sin (30)}\\\\\dfrac{3}{4}=\sin(\dfrac{60+\delta _m}{2})\\\\\sin^{-1}(\dfrac{3}{4})=\dfrac{60+\delta _m}{2}\ ........(1)\\\\48.49=\dfrac{60+\delta _m}{2}\\\\\delta_m=36.98^{\circ}\end{lgathered}$$ We know that, angle of incidence is : $$i=\dfrac{A+\delta_m}{2}$$

23.

Ek samabahu prizm ekpristho rasmi ki apatan kon 30°.. another pritho ki patisarn kon 40°..so rasmi ki chuti kitni hogi ?

Answer»

Answer:

The incidence angle is 48.59 degrees and angle of MINIMUM deviation is 36.98 degrees.

Explanation:

Refracting angle o f a prism A=60∘ and its REFRACTIVE INDEX is n=3/2. What is angle of incidence i to get minimum deviation. Also, find the minimum deviation. Assume the SURROUNDING medium to be air (n=1).

We have,

Angle of prism, A = 60

Refractive index, n = 3/2

For minimum deviation, the refractive index is given by :

n=\dfrac{\sin (A+\delta _m)/2}{\sin A/2}n=

sinA/2

sin(A+δ

m

)/2

\delta_mδ

m

is minimum deviation

$$\begin{lgathered}\dfrac{3}{2}=\dfrac{\sin (60+\delta _m)/2}{\sin 60/2}\\\\\dfrac{3}{2}=\dfrac{\sin (60+\delta _m)/2}{\sin (30)}\\\\\dfrac{3}{4}=\sin(\dfrac{60+\delta _m}{2})\\\\\sin^{-1}(\dfrac{3}{4})=\dfrac{60+\delta _m}{2}\ ........(1)\\\\48.49=\dfrac{60+\delta _m}{2}\\\\\delta_m=36.98^{\circ}\end{lgathered}$$

We know that, angle of incidence is :

$$i=\dfrac{A+\delta_m}{2}$$

Discussion

24.	A space molecule has a degree?
Answer» Answer: 3 Explanation: a SPACE MOLECULE has a3degree hope it helps. thank U

24.

A space molecule has a degree?

Answer»

Answer:

3

Explanation:

a SPACE MOLECULE has a3degree

hope it helps.

thank U

Discussion

25.	Imagine that a force is applied in opposite direction of the motion of an object. What will happen if the applied force is not sufficient to stop the object?
Answer» The OBJECT will deaccelerate or slow down. It will depend of the MAGNITUDE of FORCE APPLIED.

Discussion

26.	Explain why is difficult for a fire man to hold a house, which ejects large amounts of water at a high velocity?د
Answer» EVERY action has an equal and opposite reaction. When the fireman HOLDS the hose, it has an opposite reaction according to the third law of motion. ... Thus, due to the opposite reaction of the water with HIGH velocity a fireman finds it difficult to hold the hose. . . . plzz MARK it as the brainliest answer!!!

26.

Explain why is difficult for a fire man to hold a house, which ejects large amounts of water at a high velocity?د

Answer»

EVERY action has an equal and opposite reaction. When the fireman HOLDS the hose, it has an opposite reaction according to the third law of motion. ... Thus, due to the opposite reaction of the water with HIGH velocity a fireman finds it difficult to hold the hose.

.

plzz MARK it as the brainliest answer!!!

Discussion

27.	2. A body has its centre of mass at the origin. Thex-coordinates of the particles(a) may be all positive(c) may be all non-negative(d) may be positive for some case and negative in othernegative X-axis.plz explain
Answer» ANSWER: a MAY be all POSITIVE gegegegwwueuyesbhegsbsjiw

27.

2. A body has its centre of mass at the origin. Thex-coordinates of the particles(a) may be all positive(c) may be all non-negative(d) may be positive for some case and negative in othernegative X-axis.plz explain

Answer»

ANSWER:

a MAY be all POSITIVE gegegegwwueuyesbhegsbsjiw

Discussion

28.	Please please help me out.
Answer» Explanation: 1. OA represents uniform acceleration. 2. AB represents uniform speed. 3. acceleration = 40 / 6 = 20/3 m/s² 4. retardation = 40/ (24-14) = 40 / 10 = - 4 m/s² 5. DISTANCE = speed × TIME = 40 × 6 = 240 m

28.

Please please help me out.

Answer»

Explanation:

1. OA represents uniform acceleration.

2. AB represents uniform speed.

3. acceleration

= 40 / 6

= 20/3 m/s²

4. retardation = 40/ (24-14)

= 40 / 10

= - 4 m/s²

5. DISTANCE

= speed × TIME

= 40 × 6

= 240 m

Discussion

29.	A 2cm tall object is placed perpendicular to the principle axis of a convex lens of focal length 10 cm the distance of the object from the lens is 15 cm find the nature,position, and size of image also find its magnification
Answer» EXPLANATION: this is your ANSWER PLS FOLLOW me

29.

A 2cm tall object is placed perpendicular to the principle axis of a convex lens of focal length 10 cm the distance of the object from the lens is 15 cm find the nature,position, and size of image also find its magnification

Answer»

EXPLANATION:

this is your ANSWER PLS FOLLOW me

Discussion

30.	Furti vdan da kehra trika sahi ni hai
Answer» ANSWER: HAY sahiye hay aur AAGE BOLO

30.

Furti vdan da kehra trika sahi ni hai

Answer»

ANSWER:

HAY sahiye hay

aur AAGE BOLO

Discussion

31.	Unit of Electric Field is -(a)Newton/Coulomb(b)Coulomb/Newton(c)Joule/Coulomb(d)Coulomb/ Joule.
Answer» ANSWER: OPTION AIS ABSOLUTELY RIGHT

31.

Unit of Electric Field is -(a)Newton/Coulomb(b)Coulomb/Newton(c)Joule/Coulomb(d)Coulomb/ Joule.

Answer»

ANSWER:

OPTION AIS ABSOLUTELY RIGHT

Discussion

32.	In inelastic collsion.........Are conserved
Answer» Answer: An inelastic COLLISION, in contrast to an elastic collision, is a collision in which kinetic energy is not conserved due to the action of INTERNAL friction. ... ALTHOUGH inelastic collisions do not conserve kinetic energy, they do obey conservation of momentum. Explanation: *mark me as BRAINLIEST PLEASE*

32.

In inelastic collsion.........Are conserved

Answer»

Answer:

An inelastic COLLISION, in contrast to an elastic collision, is a collision in which kinetic energy is not conserved due to the action of INTERNAL friction. ... ALTHOUGH inelastic collisions do not conserve kinetic energy, they do obey conservation of momentum.

Explanation:

mark me as BRAINLIEST PLEASE

Discussion

33.	2. How many different resistance combinations are possible with three equal resistors takenall of them together?
Answer» There are four COMBINATIONS possible if three equal resistance are taken together. The all possible combinations are shown in the figures. 1st Combination All resistors will be in SERIES. 2nd Combination Two resistors will be in series forming a TOTAL resistance of R1 and one RESISTOR is attached parallel to R1 3rd Combination Two resistors will be in parallel forming a total resistance of R1 and one resistor is attached in series to R1 4th Combination All resistors are attached in parallel. Extra Info: What are Resistors? >Resistors are USED to reduce the flow of current.

33.

2. How many different resistance combinations are possible with three equal resistors takenall of them together?

Answer»

There are four COMBINATIONS possible if three equal resistance are taken together.

The all possible combinations are shown in the figures.

1st Combination

All resistors will be in SERIES.

2nd Combination

Two resistors will be in series forming a TOTAL resistance of R1 and one RESISTOR is attached parallel to R1

3rd Combination

Two resistors will be in parallel forming a total resistance of R1 and one resistor is attached in series to R1

4th Combination

All resistors are attached in parallel.

Extra Info:

What are Resistors?

>Resistors are USED to reduce the flow of current.

Discussion

34.	10 m উঁচু একটি টিলার চূড়ায় অবস্থিত দুটি কামান থেকে একটি করে গােলাএকই বেগে কিছু সময়ের অবকাশে ছােড়া হল। প্রতিটি গােলার বেগ5,3 m/s \| একটি গােলাকে অনুভূমিক দিকে এবং অপরটিকে অনুভূমিকেরসঙ্গে 60° কোণে ওপরের দিকে ছােড়া হয়েছে। গােলা দুটি বায়ুতে Pবিন্দুতে সংঘর্ষে লিপ্ত হয়। (i) গােলা দুটি ছােড়ার মধ্যে সময়ের অবকাশ এবং(i) P বিন্দুর স্থানাঙ্ক নির্ণয় করাে। ধরে নাও, নির্দেশতন্ত্রের মূলবিন্দু টিলারপাদদেশে কামানের নলের ঠিক নীচে এবং গােলা দুটির প্রক্ষেপ পথ xy -তলেঅবস্থিত।tures [;)। a. ii) ( 5 m = 1
Answer» EXPLANATION: FOLLOW me you all I have FOLLOWED you all

34.

10 m উঁচু একটি টিলার চূড়ায় অবস্থিত দুটি কামান থেকে একটি করে গােলাএকই বেগে কিছু সময়ের অবকাশে ছােড়া হল। প্রতিটি গােলার বেগ5,3 m/s | একটি গােলাকে অনুভূমিক দিকে এবং অপরটিকে অনুভূমিকেরসঙ্গে 60° কোণে ওপরের দিকে ছােড়া হয়েছে। গােলা দুটি বায়ুতে Pবিন্দুতে সংঘর্ষে লিপ্ত হয়। (i) গােলা দুটি ছােড়ার মধ্যে সময়ের অবকাশ এবং(i) P বিন্দুর স্থানাঙ্ক নির্ণয় করাে। ধরে নাও, নির্দেশতন্ত্রের মূলবিন্দু টিলারপাদদেশে কামানের নলের ঠিক নীচে এবং গােলা দুটির প্রক্ষেপ পথ xy -তলেঅবস্থিত।tures [;)। a. ii) ( 5 m = 1

Answer»

EXPLANATION:

FOLLOW me you all I have FOLLOWED you all

Discussion

35.	What is the units of density ? what are a basic units involve in it?
Answer» Answer: Density is commonly EXPRESSED in units of grams PER cubic centimetre. For example, the density of WATER is 1 gram per cubic centimetre, and Earth's density is 5.51 grams per cubic centimetre. Density can also be expressed as kilograms per cubic metre (in MKS or SI units). Explanation:

35.

What is the units of density ? what are a basic units involve in it?

Answer»

Answer:

Density is commonly EXPRESSED in units of grams PER cubic centimetre. For example, the density of WATER is 1 gram per cubic centimetre, and Earth's density is 5.51 grams per cubic centimetre. Density can also be expressed as kilograms per cubic metre (in MKS or SI units).

Explanation:

Discussion

36.	Can we use H=I^2 Rt formula to this question?
Answer» ANSWER: YES you can USE it but where is the QUESTION?

36.

Can we use H=I^2 Rt formula to this question?

Answer»

ANSWER:

YES you can USE it

but where is the QUESTION?

Discussion

37.	The slope of displacement-time graph for a car parked in a parking area is _________. Tell me answer in fill ups type.
Answer» EXPLANATION: Straight LINE PARALLEL to x-axis is CORRECT answer.........

37.

The slope of displacement-time graph for a car parked in a parking area is _________. Tell me answer in fill ups type.

Answer»

EXPLANATION:

Straight LINE PARALLEL to x-axis is CORRECT answer.........

Discussion

38.	1.5 km১. একটি যুদ্ধবিমান ভূমি থেকেউচ্চতায়অনুভূমিকভাবে720 km : h-1 বেগে গতিশীল। কোনাে এক মুহূর্তে বিমানটি ভূমিতেঅবস্থিত একটি যুদ্ধবিমান প্রতিরােধকারী আগ্নেয়াস্ত্রকে অতিক্রম করল।সেই মুহূর্তেই ওই যুদ্ধবিমান প্রতিরােধকারী আগ্নেয়াস্ত্রটি থেকে 600 ms-1বেগে একটি ক্ষেপণাস্ত্র নিক্ষেপ করা হল। উল্লম্বের সাথে কত কোগেক্ষেপণাস্ত্রটিকে নিক্ষেপ করলে সেটি যুদ্ধবিমানটিকে আঘাত করতে পারবে?ভূমি থেকে ন্যূনতম কত উচ্চতায় চালকটি বিমানটিকে ওড়ালে সেটিক্ষেপণাস্ত্রের আঘাত থেকে নিজেকে রক্ষা করতে পারবে? ধরে নাও,g = 10 ms-2 \|yet 17
Answer» EXPLANATION: இயக்கக ழிடுச் Lakshmi

38.

1.5 km১. একটি যুদ্ধবিমান ভূমি থেকেউচ্চতায়অনুভূমিকভাবে720 km : h-1 বেগে গতিশীল। কোনাে এক মুহূর্তে বিমানটি ভূমিতেঅবস্থিত একটি যুদ্ধবিমান প্রতিরােধকারী আগ্নেয়াস্ত্রকে অতিক্রম করল।সেই মুহূর্তেই ওই যুদ্ধবিমান প্রতিরােধকারী আগ্নেয়াস্ত্রটি থেকে 600 ms-1বেগে একটি ক্ষেপণাস্ত্র নিক্ষেপ করা হল। উল্লম্বের সাথে কত কোগেক্ষেপণাস্ত্রটিকে নিক্ষেপ করলে সেটি যুদ্ধবিমানটিকে আঘাত করতে পারবে?ভূমি থেকে ন্যূনতম কত উচ্চতায় চালকটি বিমানটিকে ওড়ালে সেটিক্ষেপণাস্ত্রের আঘাত থেকে নিজেকে রক্ষা করতে পারবে? ধরে নাও,g = 10 ms-2 |yet 17

Answer»

EXPLANATION:

இயக்கக ழிடுச்

Lakshmi

Discussion

39.	A train starting from the rest attains a velocity of 72 km per hour in 5 minutes. Assuming that the acceleration is uniform, find the acceleration and the distance travelled by the train to attend this velocity
Answer» ANSWER: ACCELERATION = 0.66 m/ s² distance = 0.6 KM EXPLANATION:-

39.

A train starting from the rest attains a velocity of 72 km per hour in 5 minutes. Assuming that the acceleration is uniform, find the acceleration and the distance travelled by the train to attend this velocity

Answer»

ANSWER:

ACCELERATION = 0.66 m/ s²

distance = 0.6 KM

EXPLANATION:-

Discussion

40.	Which colour is given to flood light and why
Answer» Answer: The most COMMON TYPE of floodlight is the metal - HALIDE lamp, which EMITS a BRIGHT white light

40.

Which colour is given to flood light and why

Answer»

Answer:

The most COMMON TYPE of floodlight is the metal - HALIDE lamp, which EMITS a BRIGHT white light

Discussion

41.	1. Given five equal resistances; each of the value 5 ohms. (a) What is the maximumresistance that can be obtained from them? (b) What is the minimum resistance that can be obtained from them?
Answer» Answer: And the highest possible WOULD be connecting all of them in series. R1, R2, R3, R4, R5 in series equals to the sum of their individual RESISTANCE. So R1+R2+R3+R4+R5, since the resistors are all 5 ohms each, it's going to be 5 * 5 ohms = 25 ohms. Explanation: CHAMPION is here

41.

1. Given five equal resistances; each of the value 5 ohms. (a) What is the maximumresistance that can be obtained from them? (b) What is the minimum resistance that can be obtained from them?

Answer»

Answer:

And the highest possible WOULD be connecting all of them in series. R1, R2, R3, R4, R5 in series equals to the sum of their individual RESISTANCE. So R1+R2+R3+R4+R5, since the resistors are all 5 ohms each, it's going to be 5 * 5 ohms = 25 ohms.

Explanation:

CHAMPION is here

Discussion

42.	) Whose value may be zero for a moving particle -(a) Displacement(b) Distance(c) Speed(d) None of these
Answer» ANSWER: Displacement Explanation: It is UR answer

42.

) Whose value may be zero for a moving particle -(a) Displacement(b) Distance(c) Speed(d) None of these

Answer»

ANSWER:

Displacement

Explanation:

It is UR answer

Discussion

43.	Draw a graph between the length of a simple pendulum (l) and the square of its time period (T2) to represent the dependence of time period of a simple pendulum on its pendulum.
Answer» EXPLANATION: T=√L÷g T^2=l÷g T^2 DIRECTLY PROPOTIONAL TOTHE l

43.

Draw a graph between the length of a simple pendulum (l) and the square of its time period (T2) to represent the dependence of time period of a simple pendulum on its pendulum.

Answer»

EXPLANATION:

T=√L÷g

T^2=l÷g

T^2 DIRECTLY PROPOTIONAL TOTHE l

Discussion

44.	A car is moving at a velocity of 54Kmh ^ -1. Suddenly driver applies brakes and produces a deceleration of 6m/s2. Find the distance covered by the car before coming to rest.
Answer» Given:- Initial VELOCITY of the car(u)=54km/h =>54×5/18 =>3×5 =>15m/s Deceleration=6m/s Thus,ACCELERATION(a) is -6m/s² Final velocity(v)=0 (as the car finally STOPS after the application of brakes) To find:- Distance covered by the car be fore COMING to rest(s). Solution:- We wil use here the third equation of motion i.e.---- ${v}^{2} - {u}^{2} = 2as$ $0 - {15}^{2} = 2 \times ( - 6)s$ $- 225 = - 12s$ $s = \frac{ - 225}{ - 12}$ $s = 18.75m$ Thus,the distance covered by the car is 18.75m.

44.

A car is moving at a velocity of 54Kmh ^ -1. Suddenly driver applies brakes and produces a deceleration of 6m/s2. Find the distance covered by the car before coming to rest.

Answer»

Given:-

Initial VELOCITY of the car(u)=54km/h

=>54×5/18

=>3×5

=>15m/s

Deceleration=6m/s

Thus,ACCELERATION(a) is -6m/s²

Final velocity(v)=0 (as the car finally STOPS after the application of brakes)

To find:-

Distance covered by the car be fore COMING to rest(s).

Solution:-

We wil use here the third equation of motion i.e.----

${v}^{2} - {u}^{2} = 2as$

$0 - {15}^{2} = 2 \times ( - 6)s$

$- 225 = - 12s$

$s = \frac{ - 225}{ - 12}$

$s = 18.75m$

Thus,the distance covered by the car is 18.75m.

Discussion

45.	I) Work done by a conservative force on an object at a closed path is -(a)Maximum(b)Minimum(c) Zero(d) Infinite.
Answer» Answer: MAXIMUM i think so HOPE IT HELPS YOU AND PLEASE MARK ME AS THE BRAINLIEST ☺️☺️

45.

I) Work done by a conservative force on an object at a closed path is -(a)Maximum(b)Minimum(c) Zero(d) Infinite.

Answer»

Answer:

MAXIMUM i think so

HOPE IT HELPS YOU AND PLEASE MARK ME AS THE BRAINLIEST ☺️☺️

Discussion

46.	Pls answer this ques....
Answer» Magnetic fields can be PICTORIALLY REPRESENTED by magnetic field lines, the PROPERTIES of which are as follows: The field is tangent to the magnetic field line. Field strength is PROPORTIONAL to the line density. Field lines cannot cross. Field lines are continuous LOOPS

46.

Pls answer this ques....

Answer»

Magnetic fields can be PICTORIALLY REPRESENTED by magnetic field lines, the PROPERTIES of which are as follows:

The field is tangent to the magnetic field line.

Field strength is PROPORTIONAL to the line density.

Field lines cannot cross.

Field lines are continuous LOOPS

Discussion

47.	Plz ans....................
Answer» Answer: Thank you so much for the free points everyday namaste to unfollow namaste I am bot dull enough to be a good day ahead with the same thing to do it for you so much baby I love you too baby GIRL NAMES of the day I will be reported in the morning I will be there in the morning and have fun with you and me are not coming to college tomorrow morning and have a nice day and night and follow the same to same hi to bola to jay na bole abhiyoj utheche ek SAMAY MONE hoy na JE ami ar amar mot jara amar mot jara amar mot jara amar mot jara amar mot jara amar mot jara amar mot jara amar mot jara amar mot jara amar mot jara amar

47.

Plz ans....................

Answer»

Answer:

Thank you so much for the free points everyday namaste to unfollow namaste I am bot dull enough to be a good day ahead with the same thing to do it for you so much baby I love you too baby GIRL NAMES of the day I will be reported in the morning I will be there in the morning and have fun with you and me are not coming to college tomorrow morning and have a nice day and night and follow the same to same hi to bola to jay na bole abhiyoj utheche ek SAMAY MONE hoy na JE ami ar amar mot jara amar mot jara amar mot jara amar mot jara amar mot jara amar mot jara amar mot jara amar mot jara amar mot jara amar mot jara amar

Discussion

48.	two wires at position a and b carrying a current i in opposite direction calculate magnetic field at point p which is 3 m away from the line two wires as shown in fig.
Answer» ANSWER: hiiiiiiiiiiiiiiiiiiii............................okkkk Explanation: ...................................

48.

two wires at position a and b carrying a current i in opposite direction calculate magnetic field at point p which is 3 m away from the line two wires as shown in fig.

Answer»

ANSWER:

hiiiiiiiiiiiiiiiiiiii............................okkkk

Explanation:

...................................

Discussion

49.	What is the velocity of light in a medium with refractive index 1.5??
Answer» Answer: All WAVES in electromagnetic spectrum TRAVELS at the same speed. If Refractive INDEX of the medium is 1.5 the its speed is, speed of light in air/ refractive index= 3,00,000/1.5= 2,00,000 Km/s. I HOPE THIS IS HELPFUL TO YOU

49.

What is the velocity of light in a medium with refractive index 1.5??

Answer»

Answer:

All WAVES in electromagnetic spectrum TRAVELS at the same speed. If Refractive INDEX of the medium is 1.5 the its speed is, speed of light in air/ refractive index= 3,00,000/1.5= 2,00,000 Km/s.

I HOPE THIS IS HELPFUL TO YOU

Discussion

50.	Calculate the current flows through the 10 Ω resistor in the following circuit. *
Answer» ANSWER: 0.06 Explanation:

50.

Calculate the current flows through the 10 Ω resistor in the following circuit. *

Answer»

ANSWER: 0.06

Explanation:

Discussion

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A 2cm tall object is placed perpendicular to the principle axis of a convex lens of focal length 10 cm the distance of the object from the lens is 15 cm find the nature,position, and size of image also find its magnification

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In inelastic collsion.........Are conserved

mark me as BRAINLIEST PLEASE

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Which colour is given to flood light and why

1. Given five equal resistances; each of the value 5 ohms. (a) What is the maximumresistance that can be obtained from them? (b) What is the minimum resistance that can be obtained from them?​

And the highest possible WOULD be connecting all of them in series. R1, R2, R3, R4, R5 in series equals to the sum of their individual RESISTANCE. So R1+R2+R3+R4+R5, since the resistors are all 5 ohms each, it's going to be 5 * 5 ohms = 25 ohms.

CHAMPION is here

) Whose value may be zero for a moving particle -(a) Displacement(b) Distance(c) Speed(d) None of these​

Draw a graph between the length of a simple pendulum (l) and the square of its time period (T2) to represent the dependence of time period of a simple pendulum on its pendulum.

A car is moving at a velocity of 54Kmh ^ -1. Suddenly driver applies brakes and produces a deceleration of 6m/s2. Find the distance covered by the car before coming to rest.

Given:-

To find:-

Solution:-

I) Work done by a conservative force on an object at a closed path is -(a)Maximum(b)Minimum(c) Zero(d) Infinite.​

Pls answer this ques....​

Plz ans....................

two wires at position a and b carrying a current i in opposite direction calculate magnetic field at point p which is 3 m away from the line two wires as shown in fig.

What is the velocity of light in a medium with refractive index 1.5??

Calculate the current flows through the 10 Ω resistor in the following circuit. *

Derive the equation of maximum height reached by a thrown upwards object

Theangleofincidenceforarayoflightpassingthroughthecentreofcurvatureofaconcavemirroris(d) at infinityc) at the centre of curvature(2) 90(c) 0°(d) 180°

7. Which of these is an example of reversible change?a. Melting of waxC. Curdling of milkd. Ripening of mangob. Burning of wood

An unchanged capacitors is connestadshow that half theenergy supplied by thebattery is lost as heatwhile changing thecapacitors.

Definition of density.

To form N-type of semiconductor, which type of impurities is added in Si-(a)Tri-valent(b)Penta-valent(c)Both of above(d)None of above two.

5. Draw a labelled circuit diagram for the verification of Ohm’s law. Plot a I-V graph for anohmic conductor. answer fast

According to Rudderford's Atomic Model, electrons inside the atom -(a)remain stationary(b)centralised(c)moves around(d)none of these.

2. How many different resistance combinations are possible with three equal resistors takenall of them together? answer fast

Ek samabahu prizm ekpristho rasmi ki apatan kon 30°.. another pritho ki patisarn kon 40°..so rasmi ki chuti kitni hogi ?

A space molecule has a degree?

Explain why is difficult for a fire man to hold a house, which ejects large amounts of water at a high velocity?د

2. A body has its centre of mass at the origin. Thex-coordinates of the particles(a) may be all positive(c) may be all non-negative(d) may be positive for some case and negative in othernegative X-axis.plz explain

Please please help me out.

Furti vdan da kehra trika sahi ni hai

Unit of Electric Field is -(a)Newton/Coulomb(b)Coulomb/Newton(c)Joule/Coulomb(d)Coulomb/ Joule.

2. How many different resistance combinations are possible with three equal resistors takenall of them together?

1. Given five equal resistances; each of the value 5 ohms. (a) What is the maximumresistance that can be obtained from them? (b) What is the minimum resistance that can be obtained from them?

) Whose value may be zero for a moving particle -(a) Displacement(b) Distance(c) Speed(d) None of these

I) Work done by a conservative force on an object at a closed path is -(a)Maximum(b)Minimum(c) Zero(d) Infinite.

Pls answer this ques....