67486 + Interview Questions in Secondary School in Physics

1.	Tell to me correct answer
Answer» ANSWER: the FORCE that acts opposite the flow of an ELECTRIC current is CALLED ELECTRICAL resistivity it's unit is ohm:Ω

1.

Tell to me correct answer

Answer»

ANSWER:

the FORCE that acts opposite the flow of an ELECTRIC current is CALLED ELECTRICAL resistivity

it's unit is ohm:Ω

Discussion

2.	Ha bro I too love horror movie we have same teas
Answer» ANSWER: HELLLO.. GOOD AFTERNOON....

2.

Ha bro I too love horror movie we have same teas

Answer»

ANSWER:

HELLLO..

GOOD AFTERNOON....

Discussion

3.	Motion of minute and second hand which motion
Answer» ANSWER: UNIFORM CIRCULAR MOTION

3.

Motion of minute and second hand which motion

Answer»

ANSWER:

UNIFORM CIRCULAR MOTION

Discussion

4.	A sample of vitamin C is known to contain 2.409 x 1024 oxygenatoms. How many moles of oxygen atoms are present in thesample?
Answer» Answer: Explanation: the law of definite proportion, sometimes called PROUST's law, or law of constant composition states that a given CHEMICAL compound always CONTAINS its component elements in fixed ratio (by mass) and does not depend on its source and method of preparation.

4.

A sample of vitamin C is known to contain 2.409 x 1024 oxygenatoms. How many moles of oxygen atoms are present in thesample?

Answer»

Answer:

Explanation:

the law of definite proportion, sometimes called PROUST's law, or law of constant composition states that a given CHEMICAL compound always CONTAINS its component elements in fixed ratio (by mass) and does not depend on its source and method of preparation.

Discussion

5.	Wheels reduces the friction between a moving body and the ground. *TrueFalse
Answer» ANSWER: YES it's ABSOLUTELY TRUE..........

5.

Wheels reduces the friction between a moving body and the ground. *TrueFalse

Answer»

ANSWER:

YES it's ABSOLUTELY TRUE..........

Discussion

6.	From collinear vector (physics)If P and Q have cos= 60° then will P and Q be equalEquation :
Answer» ANSWER: SORRY I NEED some POINTS sorry

6.

From collinear vector (physics)If P and Q have cos= 60° then will P and Q be equalEquation :

Answer»

ANSWER:

SORRY I NEED some POINTS sorry

Discussion

7.	A ray of light travelling in medium-1 ofrefractive index Un is incident on medium-2 ofrefractive index M2. If i and r are the angle ofincident and angle of refraction while v1 and v2are the speed of light in medium-1 andmedium-2 respectively, then match thecolumns I=30
Answer» ANSWER: sin i/sin R= V2/ v1 = M2/Un. Snall's law of refraction, by ncert CHAPTER 9

7.

A ray of light travelling in medium-1 ofrefractive index Un is incident on medium-2 ofrefractive index M2. If i and r are the angle ofincident and angle of refraction while v1 and v2are the speed of light in medium-1 andmedium-2 respectively, then match thecolumns I=30

Answer»

ANSWER:

sin i/sin R= V2/ v1 = M2/Un.

Snall's law of refraction, by ncert CHAPTER 9

Discussion

8.	If the current in a wire is flowing in the vertically downwarddirection and a magnetic field is applied from west to east,what the direction of force on wire?
Answer»

Discussion

9.	34.A clock has copper pendulum beats seconds correctly when temperature of the room is 30°C, the time loss or gain per day when temperature falls to 10°C is (α=1.9×10 ￣⁵K￣¹).loss 16.43 secloss 4.2 sec.gain 17.28 secgain 4.2 sec
Answer» Given: Temperature at which the clock PENDULUM BEATS seconds correctly = 30°C α = 1.9 × 10⁻⁵K⁻¹ To find: Time loss or gain per day when temperature falls to 10°C Solution: Let us assume that the pendulum has a time period of 2 sec. ΔT = 1/2αΔθt Where Δθ = 10°-30°C = -20°C t = Seconds in a day = 24×60×60 Putting the values in the EQUATION we get: ΔT = 1/2×1.9 × 10⁻⁵×(-20)×24×60×60 ΔT = -16.416 Here NEGATIVE sign shows that time is lost. ∴ Time lost in one day = 16.416 sec Therefore time lost in one day will be EQUAL to 16.416 sec.*

9.

34.A clock has copper pendulum beats seconds correctly when temperature of the room is 30°C, the time loss or gain per day when temperature falls to 10°C is (α=1.9×10 ￣⁵K￣¹).loss 16.43 secloss 4.2 sec.gain 17.28 secgain 4.2 sec

Answer»

Given:

Temperature at which the clock PENDULUM BEATS seconds correctly = 30°C

α = 1.9 × 10⁻⁵K⁻¹

To find:

Time loss or gain per day when temperature falls to 10°C

Solution:

Let us assume that the pendulum has a time period of 2 sec.

ΔT = 1/2*αΔθt

Where Δθ = 10°-30°C = -20°C

t = Seconds in a day = 24×60×60

Putting the values in the EQUATION we get:

ΔT = 1/2×1.9 × 10⁻⁵×(-20)×24×60×60

ΔT = -16.416

Here NEGATIVE sign shows that time is lost.

∴ Time lost in one day = 16.416 sec

Therefore time lost in one day will be EQUAL to 16.416 sec.

Discussion

10.	What is snall's law ? Defination
Answer» ANSWER: Snell's law, in OPTICS, a relationship between the path taken by a ray of light in crossing the boundary or SURFACE of SEPARATION between two contacting substances and the refractive index of each. This law was DISCOVERED in 1621 by the Dutch astronomer and mathematician Willebrord Snell (also called Snellius). mark me as the brainliest plzz ✌️⚡

10.

What is snall's law ? Defination

Answer»

ANSWER:

Snell's law, in OPTICS, a relationship between the path taken by a ray of light in crossing the boundary or SURFACE of SEPARATION between two contacting substances and the refractive index of each. This law was DISCOVERED in 1621 by the Dutch astronomer and mathematician Willebrord Snell (also called Snellius).

mark me as the brainliest plzz ✌️⚡

Discussion

11.	हाउ वी कैन फिल्टर आउट रिपोर्ट डीसीहाउ वी कैन फिल्टर आउट रिपोर्ट डीसी
Answer» ANSWER: HI BRO I am a bad guy who is from the INTENDED recipient you Explanation:

11.

हाउ वी कैन फिल्टर आउट रिपोर्ट डीसीहाउ वी कैन फिल्टर आउट रिपोर्ट डीसी

Answer»

ANSWER:

HI BRO I am a bad guy who is from the INTENDED recipient you

Explanation:

Discussion

12.	State & prove perpendicular axes theorem
Answer» ANSWER: .......................

12.

State & prove perpendicular axes theorem

Answer»

ANSWER:

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

Discussion

13.	Solve this please and Thank you for your help ♥️.
Answer» when the block is released it starts experincing the force of buoyancy due to which its APPARENT weight will be less than its actual weight. if the density of the block (ρ) is greater than that of LIQUID i.e., ρ > 0.88g/cc then the block sinks in to the liquid . and if the the density of the block is less than that of liquid i.e., ρ < 0.88g/cc then the block FLOATS on the liquid surface. HOPE THIS HELPS YOU !!

13.

Solve this please and Thank you for your help ♥️.

Answer»

when the block is released it starts experincing the force of buoyancy due to which its APPARENT weight will be less than its actual weight.

if the density of the block (ρ) is greater than that of LIQUID i.e., ρ > 0.88g/cc then the block sinks in to the liquid .

and if the the density of the block is less than that of liquid i.e., ρ < 0.88g/cc then the block FLOATS on the liquid surface.

HOPE THIS HELPS YOU !!

Discussion

14.	For a reversible process, magnitude of work done fromthe following PV diagram is8P(atm)14)--2 6→V(lit)
Answer» Answer: ANSWER We'll show that this process does work. Because the process is CYCLIC, there is no change in internal energy after each cycle. Therefore the network done in each cycle equals the heat added to the system. We now analyze each of the STEPS in the cycle. Step 1 - Isothermal expansion: The system does work W1 which equals the heat Q1 added to the system in the expansion because the internal energy does not change. Step 2 - Isochoric process: The work done is W 2 =0. Step 3 - Isothermal compression: The work W3 done by the system is negative, but of smaller MAGNITUDE than W1 because the area under the PV curve is less than that in step 1. The internal energy does not change, so the heat removed is Explanation: mark me as a brainliest

14.

For a reversible process, magnitude of work done fromthe following PV diagram is8P(atm)14)--2 6→V(lit)

Answer»

Answer:

ANSWER

We'll show that this process does work. Because the process is CYCLIC, there is no change in internal energy after each cycle. Therefore the network done in each cycle equals the heat added to the system. We now analyze each of the STEPS in the cycle.

Step 1 - Isothermal expansion: The system does work W1 which equals the heat Q1 added to the system in the expansion because the internal energy does not change.

Step 2 - Isochoric process: The work done is W

2

=0.

Step 3 - Isothermal compression: The work W3 done by the system is negative, but of smaller MAGNITUDE than W1 because the area under the PV curve is less than that in step 1. The internal energy does not change, so the heat removed is

Explanation:

mark me as a brainliest

Discussion

15.	13. (a)If flux changes with time as 0 = t2 – 4t +6 then what will be the emf inducedin 2 s.(b) If current in the coil having inductance 2H changes from 4A to 3A in 1s, thencalculate the emf induced in the coil.
Answer» EXPLANATION: djdjdhdhfhbdbvcvcbxbnskslqksieuhrgbbbnvvvghhhgvvnigfvhhhggvhsjdvdgeghdhdhrvdvbdbdbduxdgdbbebdjsoosuddhhdhdhddhvdvrhdhhdddddjdbdvdvddhdhhd

15.

13. (a)If flux changes with time as 0 = t2 – 4t +6 then what will be the emf inducedin 2 s.(b) If current in the coil having inductance 2H changes from 4A to 3A in 1s, thencalculate the emf induced in the coil.

Answer»

EXPLANATION:

djdjdhdhfhbdbvcvcbxbnskslqksieuhrgbbbnvvvghhhgvvnigfvhhhggvhsjdvdgeghdhdhrvdvbdbdbduxdgdbbebdjsoosuddhhdhdhddhvdvrhdhhdddddjdbdvdvddhdhhd

Discussion

16.	the diameter of a molecule of argon gas is d .find the mean free path of molecules of argon at 37°C temperature and 10^5 PA pressure.(KB = Boltzmann constant )
Answer» Given : Diameter of molecule = d Temperature = 37°C Pressure = 10⁵ Pa To FIND : Mean free path of ARGON molecules. Solution : ❖ The mean free path is the average distance travelled by a moving molecule between collisions. Formula : $\dag\:\underline{\boxed{\bf{\purple{\lambda=\dfrac{K_BT}{\sqrt2P\pi d^2}}}}}$ $\sf{K_B}$ denotes Boltzmann constant T denotes temperature P denotes pressure d denotes diameter By substituting the given values; $\sf:\implies\:\lambda=\dfrac{K_BT}{\sqrt2P\pi d^2}$ Temperature = 37°C = 310K $\sf:\implies\:\lambda=\dfrac{1.38\times 10^{-23}\times 310}{\sqrt2(10^5)(3.14)d^2}$ $\sf:\implies\:\lambda=\dfrac{96.62\times 10^{-23}}{(10^5)d^2}$ $:\implies\:\underline{\boxed{\bf{\orange{\lambda=\dfrac{9.66\times10^{-27}}{d^2}\:m}}}}$

16.

the diameter of a molecule of argon gas is d .find the mean free path of molecules of argon at 37°C temperature and 10^5 PA pressure.(KB = Boltzmann constant )

Answer»

Given :

Diameter of molecule = d

Temperature = 37°C

Pressure = 10⁵ Pa

To FIND :

Mean free path of ARGON molecules.

Solution :

❖ The mean free path is the average distance travelled by a moving molecule between collisions.

Formula :

$\dag\:\underline{\boxed{\bf{\purple{\lambda=\dfrac{K_BT}{\sqrt2P\pi d^2}}}}}$

$\sf{K_B}$ denotes Boltzmann constant
T denotes temperature
P denotes pressure
d denotes diameter

By substituting the given values;

$\sf:\implies\:\lambda=\dfrac{K_BT}{\sqrt2P\pi d^2}$

Temperature = 37°C = 310K

$\sf:\implies\:\lambda=\dfrac{1.38\times 10^{-23}\times 310}{\sqrt2(10^5)(3.14)d^2}$

$\sf:\implies\:\lambda=\dfrac{96.62\times 10^{-23}}{(10^5)d^2}$

$:\implies\:\underline{\boxed{\bf{\orange{\lambda=\dfrac{9.66\times10^{-27}}{d^2}\:m}}}}$

Discussion

17.	The root mean square speed of hydrogen molecules at a certain temperature is v If the temperature is doubled and the hydrogen gas is dissociated into atomic hydrogen, the rms speed will become xv Then find the value of x
Answer» Answer: TEMPERATURE is 300m,s. If the temperature is doubled and hydrogen gas dissociates into ATOMIC hydrogen the rms SPEED will become. ... The rms speed of oxygen molecules at a certain temperature is `upsilon`. If. PLAY. 1:58 ... The root mean square speed FO molecules of nitrogen gas is `v` at a. play. 3:22. Explanation:

17.

The root mean square speed of hydrogen molecules at a certain temperature is v If the temperature is doubled and the hydrogen gas is dissociated into atomic hydrogen, the rms speed will become xv Then find the value of x

Answer»

Answer:

TEMPERATURE is 300m,s. If the temperature is doubled and hydrogen gas dissociates into ATOMIC hydrogen the rms SPEED will become. ... The rms speed of oxygen molecules at a certain temperature is `upsilon`. If. PLAY. 1:58 ... The root mean square speed FO molecules of nitrogen gas is `v` at a. play. 3:22.

Explanation:

Discussion

18.	If bomb at rest explodes into fragments the two fragments travel in opposite direction explain
Answer» Answer: bomb at rest EXPLODES into TWO pieces. Let the mass of bomb be M and mass of two pieces be m 1 and m 2 respectively. Now, according to conservation of MOMENTUM: Mv=m 1 v 1 +M 2 v 2 Here v=0 (bomb is at rest) and v 1 and v 2 are velocities of two masses after explosion. M(0)=m 1 v 1 +m 2 v 2 m 1 v 1 +m 2 v 2 =0 m 1 v 1 =−m 2 v 2 Now, masses cannot be NEGATIVE that means the sign BELONGS to velocities. Therefore, the two pieces travel in opposite direction.

18.

If bomb at rest explodes into fragments the two fragments travel in opposite direction explain

Answer»

Answer:

bomb at rest EXPLODES into TWO pieces. Let the mass of bomb be M and mass of two pieces be m

1

and m

2

respectively. Now, according to conservation of MOMENTUM:

Mv=m

1

v

1

+M

2

v

2

Here v=0 (bomb is at rest) and v

1

and v

2

are velocities of two masses after explosion.

M(0)=m

1

v

1

+m

2

v

2

m

1

v

1

+m

2

v

2

=0

m

1

v

1

=−m

2

v

2

Now, masses cannot be NEGATIVE that means the sign BELONGS to velocities. Therefore, the two pieces travel in opposite direction.

Discussion

19.	VevrgehgehegehejegdjgeiegkwvsogskwhwkehjvrvrvDvdvvd
Answer» EXPLANATION: g8fy9d0ye953wpwrixtoxyocypvupibvpotc9yvy9g0u9yf9u

19.

VevrgehgehegehejegdjgeiegkwvsogskwhwkehjvrvrvDvdvvd

Answer»

EXPLANATION:

g8fy9d0ye953wpwrixtoxyocypvupibvpotc9yvy9g0u9yf9u

Discussion

20.	Please find me the proper detailed answer to this question.
Answer» ANSWER: POWER = 174W Explanation: PLZ MARK ME AS BRAINLEST

20.

Please find me the proper detailed answer to this question.

Answer»

ANSWER:

POWER = 174W

Explanation:

PLZ MARK ME AS BRAINLEST

Discussion

21.	What is physics ? what are uses of physics?
Answer» PHYSICS is a NATURAL SCIENCE based on experiments, MEASUREMENTS and mathematical analysis with the purpose of finding quantitative physical laws for everything from the nanoworld of the microcosmos to the planets, solar systems and galaxies that occupy the macrocosmos. $MARK AS BRAINLIEST☑️$

21.

What is physics ? what are uses of physics?

Answer»

PHYSICS is a NATURAL SCIENCE based on experiments, MEASUREMENTS and mathematical analysis with the purpose of finding quantitative physical laws for everything from the nanoworld of the microcosmos to the planets, solar systems and galaxies that occupy the macrocosmos.

$MARK AS BRAINLIEST☑️$

Discussion

22.	15. A neutron, one of the constituents of anucleus, is found to pass two points60 metres apart in a time interval of1.8 x 10-4 sec. The mass of the neutron is1.67 x 10-27 kg. Assuming that the speed isconstant, its kinetic energy is1) 9.3 x 10-7 joule 2) 9.3 x 10-14 joule3) 9.3 x 10-21 joule 4) 9.3 x 10-11 joule
Answer» EXPLANATION: sizjzjdujzjxjzu,ZI,UZU,USU,

22.

15. A neutron, one of the constituents of anucleus, is found to pass two points60 metres apart in a time interval of1.8 x 10-4 sec. The mass of the neutron is1.67 x 10-27 kg. Assuming that the speed isconstant, its kinetic energy is1) 9.3 x 10-7 joule 2) 9.3 x 10-14 joule3) 9.3 x 10-21 joule 4) 9.3 x 10-11 joule

Answer»

EXPLANATION:

sizjzjdujzjxjzu,ZI,UZU,USU,

Discussion

23.	To obtain an image on a screen, the object must be placed:a) at the centre of curvature of a concave lensb) at the centre of curvature of a convex lensc) between the focus and the optical centre of a concave lensd) between the focus and the optical centre of a convex lens
Answer» $d) between the focus and the optical centre of a convex lens☑️$ $MARK AS BRAINLIEST☑️$

23.

To obtain an image on a screen, the object must be placed:a) at the centre of curvature of a concave lensb) at the centre of curvature of a convex lensc) between the focus and the optical centre of a concave lensd) between the focus and the optical centre of a convex lens

Answer»

$d) between the focus and the optical centre of a convex lens☑️$

$MARK AS BRAINLIEST☑️$

Discussion

24.	what is the position of a real object when a magnified fortune image is produced by a convex lens of focal length 30 cm
Answer» Answer: Let the object distance be X, i.e u=−x Magnification, m= u −v ⇒ 5= −x −v ⇒v=5x Using lens FORMULA: ⇒ v 1 − u 1 = f 1 ⇒ 5x 1 − −x 1 = 30 1 ⇒ 5x 6 = 30 1 ⇒x=36 cm Thus the object distance is 36 cm.

24.

what is the position of a real object when a magnified fortune image is produced by a convex lens of focal length 30 cm

Answer»

Answer:

Let the object distance be X, i.e u=−x

Magnification, m=

u

−v

⇒ 5=

−x

−v

⇒v=5x

Using lens FORMULA:

⇒

v

1

−

u

1

=

f

1

⇒

5x

1

−

−x

1

=

30

1

⇒

5x

6

=

30

1

⇒x=36 cm

Thus the object distance is 36 cm.

Discussion

25.	Q27.ona bodyongle5 kgA force of zon actingof 야making60°horizontatoVertical component of 야 ForcemasswithFind theofYour answer
Answer» 30^0 is the ANSWER of your QUESTIONS

25.

Q27.ona bodyongle5 kgA force of zon actingof 야making60°horizontatoVertical component of 야 ForcemasswithFind theofYour answer

Answer»

30^0 is the ANSWER of your QUESTIONS

Discussion

26.	Fefade ki napane wala yantar
Answer» ANSWER: HEY I can't UNDERSTAND......?......

26.

Fefade ki napane wala yantar

Answer»

ANSWER:

HEY I can't UNDERSTAND......?......

Discussion

27.	Write the image formula for curved surface
Answer» ANSWER: SIDE inti side ok iska answer YE ha

27.

Write the image formula for curved surface

Answer»

ANSWER:

SIDE inti side ok iska answer YE ha

Discussion

28.	Read the paragraph and write your opinionencroachment of public ............................flash floods
Answer» Answer: 1. Study the GIVEN information carefully to answer the given question. ‘Galax fibre’ is manufactured only in country A. Though its demand across the WORLD has remained more or less same since the past three years, the profits earned from the fibre has decreased by 20% in the last 8 months causing an overall loss of around 35 crore. Country A has never made such a HUGE loss of Galax fibre ever. Which of the following can be inferred from the given STATEMENTS? (a) The companies that manufacture Galax fibre will have to shut down owing to losses. (b) Galax fibre is expo

28.

Read the paragraph and write your opinionencroachment of public ............................flash floods

Answer»

Answer:

1. Study the GIVEN information carefully to answer the given question. ‘Galax fibre’ is manufactured only in country A. Though its demand across the WORLD has remained more or less same since the past three years, the profits earned from the fibre has decreased by 20% in the last 8 months causing an overall loss of around 35 crore. Country A has never made such a HUGE loss of Galax fibre ever.

Which of the following can be inferred from the given STATEMENTS?

(a) The companies that manufacture Galax fibre will have to shut down owing to losses.

(b) Galax fibre is expo

Discussion

29.	Give the uses sodium hydroxide
Answer» Explanation: It is major ingredient in drain and oven cleaners. It is used in CHEMICAL MANUFACTURING, oil refining, hydraulic FRACTURING, water treatment and metal processing. It is used in the manufacture of fabric, plastic wrap, PAPER and soap.

29.

Give the uses sodium hydroxide

Answer»

Explanation:

It is major ingredient in drain and oven cleaners.

It is used in CHEMICAL MANUFACTURING, oil refining, hydraulic FRACTURING, water treatment and metal processing.

It is used in the manufacture of fabric, plastic wrap, PAPER and soap.

Discussion

30.	if a vector = 2 i cap - 2 j cap -k cap and b = icap + j cap then find angle between a vector and b vector.
Answer» Given:- a vec. = 2i^ -2j^-k^ and B vec. =i^+j^ To find:- Angle between TWO vectors. vector "a" and ''b ". Solution:- To find the vector between two angles, knowing dot product is very necessary!! $\\ so \: \: \\ a.b = \cos(x) \|a\| \|b\|$ $hence. \\ \\ \: \cos(x) = \frac{a.b}{ \|a\| \|b\| }$ here, x is the angle between two Vectors,. Now, $\cos(x) = \frac{(2i - 2j - k)(i + j)}{ \sqrt{(4 + 4 + 1) \sqrt{1 + 1} } }$ Now, as we know i^.j^=0 ,and i^.i^=1. => cos(x)= (2-2)/√18= 0/3√2 =>cos(x)=0 so, (x)=90° So,the angle inclined is 90° . Ans.

30.

if a vector = 2 i cap - 2 j cap -k cap and b = icap + j cap then find angle between a vector and b vector.

Answer»

Given:-

a vec. = 2i^ -2j^-k^

and

B vec. =i^+j^

To find:-

Angle between TWO vectors. vector "a" and ''b ".

Solution:-

To find the vector between two angles, knowing dot product is very necessary!!

$\\ so \: \: \\ a.b = \cos(x) |a| |b|$

$hence. \\ \\ \: \cos(x) = \frac{a.b}{ |a| |b| }$

here, x is the angle between two Vectors,.

Now,

$\cos(x) = \frac{(2i - 2j - k)(i + j)}{ \sqrt{(4 + 4 + 1) \sqrt{1 + 1} } }$

Now,

as we know i^.j^=0 ,and i^.i^=1.

=> cos(x)= (2-2)/√18= 0/3√2

=>cos(x)=0

so, (x)=90°

So,the angle inclined is 90° .

Ans.

Discussion

31.	Specific gravity of plastic lies between
Answer» ANSWER: specific gravity of plastic lies between 2.5-3.0

31.

Specific gravity of plastic lies between

Answer»

ANSWER:

specific gravity of plastic lies between 2.5-3.0

Discussion

32.	What happens in the gray zone between solid and liquid? ... Don't Spam!!!!
Answer» Answer: Heya Mate Here is Your Answer Below Explanation: from liquid to solid or solid to liquid the transition has to cross the grey zone. This grey zone transition is is very CRUCIAL which includes the inter molecular FORCES acting on the molecules and each atoms which makes the change in state from HOT to cold and cold to hot *Hope* it will be Helpful *Keep* *Smiling* Be Happy Forever

32.

What happens in the gray zone between solid and liquid? ... Don't Spam!!!!

Answer»

Answer:

Heya Mate

Here is Your Answer Below

Explanation:

from liquid to solid or solid to liquid the transition has to cross the grey zone. This grey zone transition is is very CRUCIAL which includes the inter molecular FORCES acting on the molecules and each atoms which makes the change in state from HOT to cold and cold to hot

Hope it will be Helpful

Keep Smiling

Be Happy Forever

Discussion

33.	Diagram of universal law of gravitation
Answer» EXPLANATION: *HOPE* it *HELPS* *you*.....

33.

Diagram of universal law of gravitation

Answer»

EXPLANATION:

HOPE it HELPS you.....

Discussion

34.	Find the resistance of the nichorme wire of length 2m and area of cross section 2mm^-2 resistivity of the nichorme 100×10^-6 ohm m
Answer» ANSWER: SORRY BRO I can't UNDERSTAND

34.

Find the resistance of the nichorme wire of length 2m and area of cross section 2mm^-2 resistivity of the nichorme 100×10^-6 ohm m

Answer»

ANSWER:

SORRY BRO I can't UNDERSTAND

Discussion

35.	Calculate molar specific heat of monotonic gas at constant volume and constant pressure
Answer» ANSWER: For MONOATOMIC gas Cv=3/2R Cp=5/2R so GAMMA =5/3

35.

Calculate molar specific heat of monotonic gas at constant volume and constant pressure

Answer»

ANSWER:

For MONOATOMIC gas

Cv=3/2R

Cp=5/2R

so GAMMA =5/3

Discussion

36.	If R1 = 5ohm, R2 = 8ohm, R3 = 12 ohm and a 6 V battery is connected to the series arrangement. Calculate (a) the total resistance in the circuit and (b) the total current flowing in the circuit (c) voltage across 12 ohm.
Answer» Answer: (a) Total R= 5ohm+8ohm+12ohm =25 ohm. (b) Total I= V/Rs = 6/25 =0.24A (C) V ACROSS 12 ohm= 0.24*12 =2.88V

36.

If R1 = 5ohm, R2 = 8ohm, R3 = 12 ohm and a 6 V battery is connected to the series arrangement. Calculate (a) the total resistance in the circuit and (b) the total current flowing in the circuit (c) voltage across 12 ohm.

Answer»

Answer:

(a) Total R= 5ohm+8ohm+12ohm

=25 ohm.

(b) Total I= V/Rs

= 6/25

=0.24A

(C) V ACROSS 12 ohm= 0.24*12

=2.88V

Discussion

37.	क्वथनांक का उन्नयन' से आप क्या समझते हैं ?
Answer» ANSWER: HI hello Explanation: have a GREAT DAY

37.

क्वथनांक का उन्नयन' से आप क्या समझते हैं ?

Answer»

ANSWER:

HI hello

Explanation:

have a GREAT DAY

Discussion

38.	What is current carring element?
Answer» Answer: Biot-Savart’s law is an equation that GIVES the magnetic field PRODUCED due to a current CARRYING segment. This segment is TAKEN as a VECTOR quantity known as the current element.

38.

What is current carring element?

Answer»

Answer:

Biot-Savart’s law is an equation that GIVES the magnetic field PRODUCED due to a current CARRYING segment. This segment is TAKEN as a VECTOR quantity known as the current element.

Discussion

39.	25C of a charge is passing through a conductor for 10 seconds findcurrent flowing in this circuit
Answer» ANSWER: gsgiebsjsosegosajaksodfdbskka

39.

25C of a charge is passing through a conductor for 10 seconds findcurrent flowing in this circuit

Answer»

ANSWER:

gsgiebsjsosegosajaksodfdbskka

Discussion

40.	Expression for resolving power and dispersive power
Answer» Answer: DISPERSIVE power of GRATING is defined by the RATIO of change in angle of diffraction to the corresponding change in wavelength. Resolving power = total aperture of the TELESCOPE objective X dispersive power.

40.

Expression for resolving power and dispersive power

Answer»

Answer:

DISPERSIVE power of GRATING is defined by the RATIO of change in angle of diffraction to the corresponding change in wavelength. Resolving power = total aperture of the TELESCOPE objective X dispersive power.

Discussion

41.	A pratical is taken round a circle by the application of force the work done by the force is
Answer» Answer: 0 Explanation: ©satyamkumar5428 Hit the MARK as BRAINLIEST BUTTON above ☝

41.

A pratical is taken round a circle by the application of force the work done by the force is

Answer»

Answer:

0

Explanation:

Hit the MARK as BRAINLIEST BUTTON above ☝

Discussion

42.	How can we define light?
Answer» Light, or Visible Light, commonly refers to electromagnetic radiation that can be detected by the human EYE. ... Light can ALSO be described in terms of a stream of PHOTONS, massless packets of energy, each travelling with wavelike PROPERTIES at the speed of light.

Discussion

43.	कौन सा तत्व प्रोटीन का मुख्य घटक है
Answer» EXPLANATION: प्रोटीन या प्रोभूजिन एक जटिल भूयाति युक्त कार्बनिक पदार्थ है जिसका गठन कार्बन, हाइड्रोजन, आक्सीजन एवं नाइट्रोजन तत्वों के अणुओं से मिलकर होता है। कुछ प्रोटीन में इन तत्वों के अतिरिक्त आंशिक रूप से गंधक, जस्ता, ताँबा तथा फास्फोरस भी उपस्थित होता है।

43.

कौन सा तत्व प्रोटीन का मुख्य घटक है

Answer»

EXPLANATION:

प्रोटीन या प्रोभूजिन एक जटिल भूयाति युक्त कार्बनिक पदार्थ है जिसका गठन कार्बन, हाइड्रोजन, आक्सीजन एवं नाइट्रोजन तत्वों के अणुओं से मिलकर होता है। कुछ प्रोटीन में इन तत्वों के अतिरिक्त आंशिक रूप से गंधक, जस्ता, ताँबा तथा फास्फोरस भी उपस्थित होता है।

Discussion

44.	What is angular displacement
Answer» Answer: ANGULAR displacement is the angle measured in radians and is defined as the shortest angle between the INITIAL and the FINAL points for a GIVEN object undergoing circular motion about a fixed POINT. Angular Displacement is a vector quantity. It has both direction and magnitude.

44.

What is angular displacement

Answer»

Answer:

ANGULAR displacement is the angle measured in radians and is defined as the shortest angle between the INITIAL and the FINAL points for a GIVEN object undergoing circular motion about a fixed POINT. Angular Displacement is a vector quantity. It has both direction and magnitude.

Discussion

45.	Describe a cell from the outside?
Answer» In cell biology, molecular biology and related fields, the word extracellular (or sometimes extracellular space) MEANS "outside the cell". This space is usually TAKEN to be outside the plasma membranes, and occupied by fluid (see extracellular matrix). The TERM is USED in CONTRAST to intracellular (inside the cell).

Discussion

46.	If sinh (10) -then it is equal to2
Answer» Answer: 10-8 =2 Explanation: MARK me as BRAINLIEST

46.

If sinh (10) -then it is equal to2

Answer»

Answer:

10-8 =2

Explanation:

MARK me as BRAINLIEST

Discussion

47.	ActivityTake two different coils of copper wire havinglarge number of turns (say 50 and 100 turnsrespectively). Insert them over a non-conductingcylindrical roll, as shown in Fig. 13.17. (You mayuse a thick paper roll for this purpose.)Connect the coil-1. having larger number ofturns, in series with a battery and a plug key.Also connect the other coil-2 withgalvanometer as shown.Plug in the key. Observe the galvanometer. Isthere a deflection in its needle? You will observethat the needle of the galvanometer instantlyjumps to one side and just as quickly returns tozero. Indicating a momentary current in coll-2.Disconnect coil-1 from the battery. You willobserve that the needle momentarily moves, butto the opposite side. It means that now thecurrent flows in the opposite direction in coil-2.HHHO)Figure 13.17Current is induced in coil-2 inhen currentin coll-1 is changed
Answer» ANSWER Choose the INCORRECT statement from the following regarding magnetic lines of field (a) The direction of magnetic field at a point is taken to be the direction in which the north pole of a magnetic compass needle points (b) Magnetic field lines are closed curves (c) If magnetic field lines are parallel and equidistant, they represent zero field strength (d) Relative strength of magnetic field is shown by the degree of closeness of the field lines Soln: Answer is (c) If magnetic field lines are parallel and equidistant, they represent zero field strength Explanation: Option c) is incorrect because parallel lines of magnetic field represent uniform magnetic field. 2. If the KEY in the arrangement (Figure 13.1) is taken out (the circuit is made open) and magnetic field lines are drawn over the horizontal plane ABCD, the lines are (a) concentric circles (b) elliptical in shape (c) straight lines parallel to each other (d) concentric circles near the point O but of elliptical shapes as we go away from it Soln: Answer is (a) concentric circles EXPLAINATION When open magnetic field lines are drawn over the horizontal plane ABCD, , then the magnetic field lines will be in the FORM of concentric circles with centre at the axis of the conductor. This is because there will be no FLOW of current and therefore there will be no magnetic field due to the conductor. So, at point O. only Earth’s magnetic field will be present so the magnetic field lines will be in the form of concentric circles. 3. A circular loop placed in a plane perpendicular to the plane of paper carries a current when the key is ON. The current as seen from points A and B (in the plane of paper and on the axis of the coil) is anti clockwise and clockwise respectively. The magnetic field lines point from B to A. The N-pole of the resultant magnet is on the face close to (a) A (b) B (c) A if the current is small, and B if the current is LARGE (d) B if the current is small and A if the current is large Soln: Answer is (a) A Explanation: Direction of Magnetic field will be from south to northpole. Point A is showing northpole because field lines are pointing from B to A

47.

ActivityTake two different coils of copper wire havinglarge number of turns (say 50 and 100 turnsrespectively). Insert them over a non-conductingcylindrical roll, as shown in Fig. 13.17. (You mayuse a thick paper roll for this purpose.)Connect the coil-1. having larger number ofturns, in series with a battery and a plug key.Also connect the other coil-2 withgalvanometer as shown.Plug in the key. Observe the galvanometer. Isthere a deflection in its needle? You will observethat the needle of the galvanometer instantlyjumps to one side and just as quickly returns tozero. Indicating a momentary current in coll-2.Disconnect coil-1 from the battery. You willobserve that the needle momentarily moves, butto the opposite side. It means that now thecurrent flows in the opposite direction in coil-2.HHHO)Figure 13.17Current is induced in coil-2 inhen currentin coll-1 is changed

Answer»

ANSWER

Choose the INCORRECT statement from the following regarding magnetic lines of field

(a) The direction of magnetic field at a point is taken to be the direction in which the north pole of a

magnetic compass needle points

(b) Magnetic field lines are closed curves

(c) If magnetic field lines are parallel and equidistant, they represent zero field strength

(d) Relative strength of magnetic field is shown by the degree of closeness of the field lines

Soln:

Answer is (c) If magnetic field lines are parallel and equidistant, they represent zero field strength

Explanation:

Option c) is incorrect because parallel lines of magnetic field represent uniform magnetic field.

2. If the KEY in the arrangement (Figure 13.1) is taken out (the circuit is made open) and magnetic field

lines are drawn over the horizontal plane ABCD, the lines are

(a) concentric circles

(b) elliptical in shape

(c) straight lines parallel to each other

(d) concentric circles near the point O but of elliptical shapes as we go away from it

Soln:

Answer is (a) concentric circles

EXPLAINATION

When open magnetic field lines are drawn over the horizontal plane ABCD, , then the magnetic field lines will be

in the FORM of concentric circles with centre at the axis of the conductor. This is because there will be no FLOW of

current and therefore there will be no magnetic field due to the conductor. So, at point O. only Earth’s magnetic

field will be present so the magnetic field lines will be in the form of concentric circles.

3. A circular loop placed in a plane perpendicular to the plane of paper carries a current when the key is

ON. The current as seen from points A and B (in the plane of paper and on the axis of the coil) is anti

clockwise and clockwise respectively. The magnetic field lines point from B to A. The N-pole of the

resultant magnet is on the face close to

(a) A

(b) B

(c) A if the current is small, and B if the current is LARGE

(d) B if the current is small and A if the current is large

Soln:

Answer is (a) A

Explanation:

Direction of Magnetic field will be from south to northpole. Point A is showing northpole because field lines are pointing from B to A

Discussion

48.	Radio waves travel at a speed of 300,000,000 m/s. WFNX broadcasts radio waves at a frequency of 101,700,000 Hertz. What is the wavelength of WFNX’s radio waves?
Answer» ANSWER: 2.94985 Explanation: If I am RIGHT then your answer is in the FIGURE

48.

Radio waves travel at a speed of 300,000,000 m/s. WFNX broadcasts radio waves at a frequency of 101,700,000 Hertz. What is the wavelength of WFNX’s radio waves?

Answer»

ANSWER:

2.94985

Explanation:

If I am RIGHT then your answer is in the FIGURE

Discussion

49.	If the power of spectacles is -2.5 d find the focal length and name the defect of vision
Answer» ANSWER: Power = 1/f [Where f is FOCAL LENGTH] -2.5 = 1/f f = -1/2.5 f = -0.4 m or -40 cm Myopia

49.

If the power of spectacles is -2.5 d find the focal length and name the defect of vision

Answer»

ANSWER:

Power = 1/f [Where f is FOCAL LENGTH]

-2.5 = 1/f

f = -1/2.5

f = -0.4 m or -40 cm

Myopia

Discussion

50.	Who is the founder of refrigerator
Answer» ANSWER: WILLIAM Culen Explanation: CHECK for SPELLING once more

50.

Who is the founder of refrigerator

Answer»

ANSWER:

WILLIAM Culen

Explanation:

CHECK for SPELLING once more

Discussion

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ANSWER

EXPLAINATION

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Ha bro I too love horror movie we have same teas

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A ray of light travelling in medium-1 ofrefractive index Un is incident on medium-2 ofrefractive index M2. If i and r are the angle ofincident and angle of refraction while v1 and v2are the speed of light in medium-1 andmedium-2 respectively, then match thecolumns I=30

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What is current carring element?

25C of a charge is passing through a conductor for 10 seconds findcurrent flowing in this circuit

A pratical is taken round a circle by the application of force the work done by the force is

How can we define light?

कौन सा तत्व प्रोटीन का मुख्य घटक है

What is angular displacement

Describe a cell from the outside?

If sinh (10) -then it is equal to2

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