67486 + Interview Questions in Secondary School in Physics

1.	Read the following StatementsStatement l: Economies of scope reduce the average cost ofproducing one product.Statement II: Economies of scale reduce the average cost ofproducing multiple products.Statement III: 3D printing is an example where the economy ofscope is more significant than the Economy of scale.Which of the above statement is TRUE
Answer» ANSWER: hope its CORRECT ch VK l Explanation: so GOOD dia FOOD

1.

Read the following StatementsStatement l: Economies of scope reduce the average cost ofproducing one product.Statement II: Economies of scale reduce the average cost ofproducing multiple products.Statement III: 3D printing is an example where the economy ofscope is more significant than the Economy of scale.Which of the above statement is TRUE

Answer»

ANSWER:

hope its CORRECT ch VK l

Explanation:

so GOOD dia FOOD

Discussion

2.	Evalute the equation
Answer» ANSWER: HOPE it HELPS U dear☺️☺️☺️

2.

Evalute the equation

Answer»

ANSWER:

HOPE it HELPS U dear☺️☺️☺️

Discussion

3.	Find the magnitude of a force if its x-component is 10N and y-component is 3N
Answer» ANSWER: So answer is ROOT of 109 for the above QUESTION

3.

Find the magnitude of a force if its x-component is 10N and y-component is 3N

Answer»

ANSWER:

So answer is ROOT of 109 for the above QUESTION

Discussion

4.	a sound wave has a frequency of 1000 hertz and wavelength of 50 cm how long will it take to travel a distance of 500m?
Answer» Given:- → FREQUENCY of the wave = 1000 Hz → Wavelength = 50 cm → Distance = 500 m To FIND:- → Time taken by the sound wave to travel given distance. Solution:- Firstly, let's convert the UNIT wavelength from cm to m. ⇒ 1 cm = 0.01 m ⇒ 50 cm = 50(0.01) ⇒ 0.5 m _______________________________ Let's calculate the speed of sound the wave. We have the formula :- υ = νλ ⇒ υ = 1000(0.5) ⇒ υ = 500 m/s ________________________________ Now, we KNOW that :- Time = Distance/Speed ⇒ Time = 500/500 ⇒ Time = 1 second Thus, the sound wave will take 1 second to travel a distance of 500 m.

4.

a sound wave has a frequency of 1000 hertz and wavelength of 50 cm how long will it take to travel a distance of 500m?

Answer»

Given:-

→ FREQUENCY of the wave = 1000 Hz

→ Wavelength = 50 cm

→ Distance = 500 m

To FIND:-

→ Time taken by the sound wave to travel given distance.

Solution:-

Firstly, let's convert the UNIT wavelength from cm to m.

⇒ 1 cm = 0.01 m

⇒ 50 cm = 50(0.01)

⇒ 0.5 m

_______________________________

Let's calculate the speed of sound the wave. We have the formula :-

υ = νλ

⇒ υ = 1000(0.5)

⇒ υ = 500 m/s

________________________________

Now, we KNOW that :-

Time = Distance/Speed

⇒ Time = 500/500

⇒ Time = 1 second

Thus, the sound wave will take 1 second to travel a distance of 500 m.

Discussion

5.	2. 9. Calculate the potential difference to be appliedacross a conductor of resistance 20ohms so that acurrent of 2 A may flow through it.
Answer» EXPLANATION: V=IR V=2×20 Potential =40V

5.

2. 9. Calculate the potential difference to be appliedacross a conductor of resistance 20ohms so that acurrent of 2 A may flow through it.

Answer»

EXPLANATION:

V=IR

V=2×20

Potential =40V

Discussion

6.	how is the kinetic energy of a moving cart affected if (a) it's mass is doubled (b) it's velocity is reduced to 1/3rd of the initial velocity. my snap is himangi4100
Answer» here is your ANSWER HOPE it HELPS

Discussion

7.	Is cyclone vulnerable to India ?
Answer» ANSWER: The 7517 km coastal area of India is hit by over 10 percent of the world's tropical cyclones year on year. The eastern coast of India is more VULNERABLE to cyclones than the WESTERN coast and there are strong scientific reasons why this is the case.

7.

Is cyclone vulnerable to India ?

Answer»

ANSWER:

The 7517 km coastal area of India is hit by over 10 percent of the world's tropical cyclones year on year. The eastern coast of India is more VULNERABLE to cyclones than the WESTERN coast and there are strong scientific reasons why this is the case.

Discussion

8.	A bus decreases its speed from 22.22m/s to 16.66m/s in 5s. Find theacceleration of the bus.
Answer» Answer: -1.112m per second square Explanation: GIVEN, INITIAL SPEED of the bus=22.22m/s(u) Final velocity of the bus=16.66m/s(v) TIME taken=5s(t) Acceleration=a we know that $a = \frac{v - u}{t}$ THEREFORE, $a = \frac{16.66 - 22.22}{5} \\ a = - 1.112$

8.

A bus decreases its speed from 22.22m/s to 16.66m/s in 5s. Find theacceleration of the bus.

Answer»

Answer:

-1.112m per second square

Explanation:

GIVEN,

INITIAL SPEED of the bus=22.22m/s(u)

Final velocity of the bus=16.66m/s(v)

TIME taken=5s(t)

Acceleration=a

we know that

$a = \frac{v - u}{t}$

THEREFORE,

$a = \frac{16.66 - 22.22}{5} \\ a = - 1.112$

Discussion

9.	(12)What do you mean by relative permittivity of a medium?
Answer» Relative PERMITTIVITY is the factor by which the electric field between the charges is DECREASED relative to VACUUM. Likewise, relative permittivity is the ratio of the capacitance of a capacitor USING that MATERIAL as a dielectric, compared with a similar capacitor that has vacuum as its dielectric.

Discussion

10.	Define critical velocity obtain an expression for the critical Satellite.
Answer» ❤️The satellite is moving with velocity Vc and the radius of the CIRCULAR ORBIT is r = R + h. This is the expression for critical velocity of a satellite moving in a circular orbit around the EARTH.

10.

Define critical velocity obtain an expression for the critical Satellite.

Answer»

❤️The satellite is moving with velocity Vc and the radius of the CIRCULAR ORBIT is r = R + h. This is the expression for critical velocity of a satellite moving in a circular orbit around the EARTH.

Discussion

11.	Electric field intensity is 900 V m⁻¹ at a distance of 2 m from a point charge. It will be 100 V m⁻¹ at a distance?
Answer» EXPLANATION: ELECTRIC field INTENSITY due to a point charge is inverse function of distance of point charge from the point where we WANT to find out the electric field intensity.

11.

Electric field intensity is 900 V m⁻¹ at a distance of 2 m from a point charge. It will be 100 V m⁻¹ at a distance?

Answer»

EXPLANATION:

ELECTRIC field INTENSITY due to a point charge is inverse function of distance of point charge from the point where we WANT to find out the electric field intensity.

Discussion

12.	a aluminium has a diameter of 0.5mm and resistivity of 1.6×10(-8) ohm metar. what will be the length of this wire to make its resistance 10mm
Answer» ANSWER: IT IS VERY DIFFICULT FOR ME TO ANSWR IT. WAIT FOR SOMEONE.

12.

a aluminium has a diameter of 0.5mm and resistivity of 1.6×10(-8) ohm metar. what will be the length of this wire to make its resistance 10mm

Answer»

ANSWER:

IT IS VERY DIFFICULT FOR ME TO ANSWR IT. WAIT FOR SOMEONE.

Discussion

13.	A particle moves 100m with a speed, 2m.s-¹ and then next200m with a speed, 3m.s-¹. Find its average speed. Steps plz.
Answer» Answer: in the first 100 m , time=d/s=100/2=50 sec in the NEXT 200m , time=d/s=200/3=66.6 sec now, AVG speed= total DISTANCE/ total time= 200+100/50+66.6 =300/116.6=2.5 m/s .. is the ANS Explanation:

13.

A particle moves 100m with a speed, 2m.s-¹ and then next200m with a speed, 3m.s-¹. Find its average speed. Steps plz.

Answer»

Answer:

in the first 100 m , time=d/s=100/2=50 sec

in the NEXT 200m , time=d/s=200/3=66.6 sec

now, AVG speed= total DISTANCE/ total time= 200+100/50+66.6

=300/116.6=2.5 m/s .. is the ANS

Explanation:

Discussion

14.	7. Two wires of the same length and the same resistivityare connected in parallel. Find the ratio of their areas ofcross section if the ratio of their electrical resistancesis 4:3
Answer» ANSWER: Two wires X,Y have the same resistivity, but their cross-sectional areas are in the ratio 2:3 and lengths in the ratio 1:2. They are first CONNECTED in series and then in parallel to a.d.c. SOURCE.

14.

7. Two wires of the same length and the same resistivityare connected in parallel. Find the ratio of their areas ofcross section if the ratio of their electrical resistancesis 4:3

Answer»

ANSWER:

Two wires X,Y have the same resistivity, but their cross-sectional areas are in the ratio 2:3 and lengths in the ratio 1:2. They are first CONNECTED in series and then in parallel to a.d.c. SOURCE.

Discussion

15.	Find electric field on 0 by c
Answer» ANSWER: EXPLANATION:PLZ MARK me as BRAINILIST plz plz plz plz plz

15.

Find electric field on 0 by c

Answer»

ANSWER:

EXPLANATION:PLZ MARK me as BRAINILIST plz plz plz

plz

Discussion

16.	Define 1 volt ???? ...
Answer» $\Huge\bf\underline{\underline{\orange{Answer}}}$ 1 VOLT MAY be DEFINED as "if 1 JOULE of work is being done in moving a 1 coulomb charge from infinity to any POINT and potential difference will be 1 volt ."

16.

Define 1 volt ???? ...

Answer»

$\Huge\bf\underline{\underline{\orange{Answer}}}$

1 VOLT MAY be DEFINED as "if 1 JOULE of work is being done in moving a 1 coulomb charge from infinity to any POINT and potential difference will be 1 volt ."

Discussion

17.	Two equal point charges(10^-3) are placed 1 cm apart in medium of dielectric constant K= 51) find the interaction force between the point charges 2)net force on any of the charge
Answer» ANSWER: NET FORCE is *1.8 ×10^7 N* wish it is HELPFUL to you

17.

Two equal point charges(10^-3) are placed 1 cm apart in medium of dielectric constant K= 51) find the interaction force between the point charges 2)net force on any of the charge

Answer»

ANSWER:

NET FORCE is 1.8 ×10^7 N

wish it is HELPFUL to you

Discussion

18.	Draw a graph for an object moving at a constant (but not uniform) acceleration. Explain the reason for the shape of the slope in the graph.
Answer» ANSWER: is attached Explanation: I hope this helps U PLEASE MARK my answer BRAINLIST

18.

Draw a graph for an object moving at a constant (but not uniform) acceleration. Explain the reason for the shape of the slope in the graph.

Answer»

ANSWER:

is attached

Explanation:

I hope this helps U PLEASE MARK my answer BRAINLIST

Discussion

19.	What is potential difference
Answer» $\Huge\bf\underline{\underline{\blue{Answer}}}$ POTENTIAL DIFFERENCE between any two points is defined as the amount of work DONE in moving a unit charge from ONE point to ANOTHER.

19.

What is potential difference

Answer»

$\Huge\bf\underline{\underline{\blue{Answer}}}$

POTENTIAL DIFFERENCE between any two points is defined as the amount of work DONE in moving a unit charge from ONE point to ANOTHER.

Discussion

20.	Convert the values ofof universal gravitationalfrom MKS to intoconstant
Answer» ANSWER: Explanation: 1g=10−3kg. SUBSTITUTE the values of dyne, cm and G in equation (i). This further IMPLIES that, G=6.67×10−11m3kg−1s−2. Hence, the value of the gravitational CONSTANT in MKS system is G=6.67×10−11m3kg−1s−2.

20.

Convert the values ofof universal gravitationalfrom MKS to intoconstant

Answer»

ANSWER:

Explanation:

1g=10−3kg. SUBSTITUTE the values of dyne, cm and G in equation (i). This further IMPLIES that, G=6.67×10−11m3kg−1s−2. Hence, the value of the gravitational CONSTANT in MKS system is G=6.67×10−11m3kg−1s−2.

Discussion

21.	7. Two wires of the same length and the same resistivityare connected in parallel. Find the ratio of their areas ofcross section if the ratio of their electrical resistancesis 4:3
Answer» 1:4 The resistance of a wire of length l and CROSS section AREA A is given by, R=ρ(l/A). So R2R1=l2l1A1A2=14. Now current through a wire is i ∝ 1/R. ∴i2i1 = R1R2 = 41 If their ENDS have the same POTENTIAL differences then currents through them will be in the ratio of 1:4.

21.

7. Two wires of the same length and the same resistivityare connected in parallel. Find the ratio of their areas ofcross section if the ratio of their electrical resistancesis 4:3

Answer»

1:4

The resistance of a wire of length l and CROSS section AREA A is given by,

R=ρ(l/A).

So

R2R1=l2l1A1A2=14.

Now current through a wire is i ∝ 1/R.

∴i2i1 = R1R2 = 41

If their ENDS have the same POTENTIAL differences then currents through them

will be in the ratio of 1:4.

Discussion

22.	A bus is traveling at 72km/hr.Brakes are applied and the bus comes to a stop after 10m.Find the retardation of the brakes
Answer» GIVEN:- Initial Velocity (U) = 72km/hr Distance (S) = 10m Final Velocity (V) = 0 To FIND:- Deceleration of the brakes. Solution:- 72km/hr → 72×5/18 U → 20m/sec As, V²-U² = 2as $→\;{\sf{0²-20² = 2×a×10}}$ $→\;{\sf{-20² = 20a}}$ $→\;{\sf{400/20 = a}}$ $→\;{\bf{a = 20m/s²}}$ Retardation = 20m/s². Hope It HELPS You ✌️

22.

A bus is traveling at 72km/hr.Brakes are applied and the bus comes to a stop after 10m.Find the retardation of the brakes

Answer»

GIVEN:-

Initial Velocity (U) = 72km/hr
Distance (S) = 10m
Final Velocity (V) = 0

To FIND:-

Deceleration of the brakes.

Solution:-

72km/hr

→ 72×5/18

U → 20m/sec

As, V²-U² = 2as

$→\;{\sf{0²-20² = 2×a×10}}$

$→\;{\sf{-20² = 20a}}$

$→\;{\sf{400/20 = a}}$

$→\;{\bf{a = 20m/s²}}$

Retardation = 20m/s².

Hope It HELPS You ✌️

Discussion

23.	⠀→ A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of 3.0 m s⁻² for 8.0 s. How far does the boat travel during this time ?
Answer» Solution - We have, Initial velocity (u) = 0 Time (t) = 8.0 s Acceleration (a) = 3.0 ms⁻² ⠀ In this question, we have to FIND the distance TRAVELLED by the boat during the GIVEN time. We will use the SECOND equation of MOTION, i.e., $\bf\longmapsto{\boxed{\pink{s = ut + \dfrac{1}{2}at^2}}}$ ⠀ Here, s = distance travelled u = initial velocity t = time taken a = acceleration ⠀ Putting values in the formula $\sf\dashrightarrow{s = 0 \times 8.0 + \dfrac{1}{2} \times 3 \times (8.0)^2}$ ⠀ $\sf\dashrightarrow{s = 0 + \dfrac{3}{2} \times 64}$ ⠀ $\sf\dashrightarrow{s = 3 \times 32}$ ⠀ $\frak\dashrightarrow{\purple{s = 96\:m}}$ ⠀ ★ $\small\underline{\sf{Thus,\: the\: boat\: travels\: a\: distance\: of\: 96\: metres.}}$

23.

⠀→ A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of 3.0 m s⁻² for 8.0 s. How far does the boat travel during this time ?

Answer»

Solution -

We have,

Initial velocity (u) = 0
Time (t) = 8.0 s
Acceleration (a) = 3.0 ms⁻²

⠀

In this question, we have to FIND the distance TRAVELLED by the boat during the GIVEN time.

We will use the SECOND equation of MOTION, i.e.,

$\bf\longmapsto{\boxed{\pink{s = ut + \dfrac{1}{2}at^2}}}$

⠀

Here,

s = distance travelled
u = initial velocity
t = time taken
a = acceleration

⠀

Putting values in the formula

$\sf\dashrightarrow{s = 0 \times 8.0 + \dfrac{1}{2} \times 3 \times (8.0)^2}$

⠀

$\sf\dashrightarrow{s = 0 + \dfrac{3}{2} \times 64}$

⠀

$\sf\dashrightarrow{s = 3 \times 32}$

⠀

$\frak\dashrightarrow{\purple{s = 96\:m}}$

⠀

★ $\small\underline{\sf{Thus,\: the\: boat\: travels\: a\: distance\: of\: 96\: metres.}}$

Discussion

24.	(9)What is microscope and telescope?
Answer» Answer: 1) the microscope is MEANT to magnify very TINY objects, whereas a TELESCOPE makes the distant objects looks closer (which are though very large,but too far to view with naked eye). 2) the telescope makes an inverted image while microscope GIVES the erect image. Explanation: I HOPE it is helpful to you

24.

(9)What is microscope and telescope?

Answer»

Answer:

1) the microscope is MEANT to magnify very TINY objects, whereas a TELESCOPE makes the distant objects looks closer (which are though very large,but too far to view with naked eye). 2) the telescope makes an inverted image while microscope GIVES the erect image.

Explanation:

I HOPE it is helpful to you

Discussion

25.	Give the dimensions of permeability of free space
Answer» $\huge\red{\mid{\fbox{\tt{ᴀɴsᴡᴇʀ }}\mid}}$ sᴏ, ᴛʜᴇ ᴜɴɪᴛ ᴏғ ᴘᴇʀᴍɪᴛᴛɪᴠɪᴛʏ ᴏғ ғʀᴇᴇ sᴘᴀᴄᴇ = ᴀ2s4ᴋɢ−1ᴍ−3 = ғᴍ−1. ʜᴀᴠɪɴɢ ᴛʜᴇ sᴀᴍᴇ ғᴏʀᴍᴜʟᴀ ᴀs ᴘᴇʀᴍɪᴛᴛɪᴠɪᴛʏ, ᴛʜᴇ ᴅɪᴍᴇɴsɪᴏɴ ᴏғ ᴘᴇʀᴍɪᴛᴛɪᴠɪᴛʏ ᴏғ ᴠᴀᴄᴜᴜᴍ ɪs ᴀʟsᴏ [ᴍ−1ᴀ2ᴛ4ʟ−3].

25.

Give the dimensions of permeability of free space

Answer»

$\huge\red{\mid{\fbox{\tt{ᴀɴsᴡᴇʀ }}\mid}}$

sᴏ, ᴛʜᴇ ᴜɴɪᴛ ᴏғ ᴘᴇʀᴍɪᴛᴛɪᴠɪᴛʏ ᴏғ ғʀᴇᴇ sᴘᴀᴄᴇ = ᴀ2s4ᴋɢ−1ᴍ−3 = ғᴍ−1. ʜᴀᴠɪɴɢ ᴛʜᴇ sᴀᴍᴇ ғᴏʀᴍᴜʟᴀ ᴀs ᴘᴇʀᴍɪᴛᴛɪᴠɪᴛʏ, ᴛʜᴇ ᴅɪᴍᴇɴsɪᴏɴ ᴏғ ᴘᴇʀᴍɪᴛᴛɪᴠɪᴛʏ ᴏғ ᴠᴀᴄᴜᴜᴍ ɪs ᴀʟsᴏ [ᴍ−1ᴀ2ᴛ4ʟ−3].

Discussion

26.	11. Initial velocity of particle is 2 m/s, the maximumvelocity of particle from t=0 to t = 20 sec is :1216 208 10(1) 20 m/s(3) 22 m/s(2) 18 m/s(4) 24 m/s
Answer» ANSWER: Maybe you missed the ACCELERATION VALUE. Coz you asked for FINAL velocity Formula are, v = u + at v² = u² + 2aS

26.

11. Initial velocity of particle is 2 m/s, the maximumvelocity of particle from t=0 to t = 20 sec is :1216 208 10(1) 20 m/s(3) 22 m/s(2) 18 m/s(4) 24 m/s

Answer»

ANSWER:

Maybe you missed the ACCELERATION VALUE. Coz you asked for FINAL velocity

Formula are, v = u + at

v² = u² + 2aS

Discussion

27.	A current or 0.5A is flowing throughthe resistance of l0 ohm. Find thePotential difference between itsends.
Answer» Explanation: CURRENT i = 0.5 A Resistance R =10 ohm Potential DIFFERENCES v By ohm's LAW $v \: = i \: R$ $v \: = 0.5 \times 10$ $v \: = 5 \: volt$

27.

A current or 0.5A is flowing throughthe resistance of l0 ohm. Find thePotential difference between itsends.

Answer»

Explanation:

CURRENT i = 0.5 A

Resistance R =10 ohm

Potential DIFFERENCES v

By ohm's LAW

$v \: = i \: R$

$v \: = 0.5 \times 10$

$v \: = 5 \: volt$

Discussion

28.	\|â +12.If= 1, the angle between â and ſ is:la-61(1) 0°(2) 45°(3) 90°(4) 60°
Answer» Answer: 40 degree I THINK it MAY RIGHT

28.

|â +12.If= 1, the angle between â and ſ is:la-61(1) 0°(2) 45°(3) 90°(4) 60°

Answer»

Answer:

40 degree

I THINK it MAY RIGHT

Discussion

29.	Opposite of gravity is (When the object is kept on surface)
Answer» Explanation: Friction Friction – a force that opposes MOTION between TWO surfaces that are touching. Gravity – a PULL that attracts objects to each other. This is a force. Balanced forces – EQUAL in strength but opposite in DIRECTION.

29.

Opposite of gravity is (When the object is kept on surface)

Answer»

Explanation:

Friction

Friction – a force that opposes MOTION between TWO surfaces that are touching. Gravity – a PULL that attracts objects to each other. This is a force. Balanced forces – EQUAL in strength but opposite in DIRECTION.

Discussion

30.	Abc is an equilateral triangle charges +q are placed at each corners the electric intensity at o will be
Answer» Answer: 0 Explanation: As per the diagram (in the ATTACHMENT) ; Keeping in mind that $\\\tt E_{1} = E_{2} = E_{3} = \dfrac{1}{4 \pi \epsilon_{\circ}} \dfrac{q}{r^2}$ Net electric field by $\\\tt E_{1}$ and $\\\tt E_{2}$ is given by: $\\\tt E_{1+2 } =\sqrt{E_{1}^{2} + E_{2}^{2} + 2E_{1} E_{2} \cos\theta} \\\\\tt = \sqrt{2E_{1}^{2} + 2E_{1}^{2}\cos120^{\circ}} \\\\\tt = \sqrt{2E_{1}^{2} + 2E_{1}^{2}(\dfrac{-1}{2}) } \\\\\\\tt = \sqrt{2E_{1}^{2} - E_{1}^{2} } \\= E_{1}$ Now, Net FORCE between $\\\tt E_{1+2}$ and $\\\tt E_{3}$ are PERPENDICULAR to each other they cancel each other out making net electric field 0.

30.

Abc is an equilateral triangle charges +q are placed at each corners the electric intensity at o will be

Answer»

Answer:

0

Explanation:

As per the diagram (in the ATTACHMENT) ;

Keeping in mind that $\\\tt E_{1} = E_{2} = E_{3} = \dfrac{1}{4 \pi \epsilon_{\circ}} \dfrac{q}{r^2}$

Net electric field by $\\\tt E_{1}$ and $\\\tt E_{2}$ is given by:

$\\\tt E_{1+2 } =\sqrt{E_{1}^{2} + E_{2}^{2} + 2E_{1} E_{2} \cos\theta} \\\\\tt = \sqrt{2E_{1}^{2} + 2E_{1}^{2}\cos120^{\circ}} \\\\\tt = \sqrt{2E_{1}^{2} + 2E_{1}^{2}(\dfrac{-1}{2}) } \\\\\\\tt = \sqrt{2E_{1}^{2} - E_{1}^{2} } \\= E_{1}$

Now,

Net FORCE between $\\\tt E_{1+2}$ and $\\\tt E_{3}$ are PERPENDICULAR to each other they cancel each other out making net electric field 0.

Discussion

31.	In an experiment to demonstrate brownian motion,smoke was placed in a smoke cell and observed using a microscope.Bright specks were seen moving randomly.Explain the observation
Answer» Explanation: Schools have for many YEARS demonstrated the principles of Brownian motion using what is known as a smoke CELL. These cells consist of a lamp and lens which is PLACED on the STAGE of a microscope. A small amount of smoke is piped into the glass cell and the MOVEMENTS of the smoke particles are observed.

31.

In an experiment to demonstrate brownian motion,smoke was placed in a smoke cell and observed using a microscope.Bright specks were seen moving randomly.Explain the observation

Answer»

Explanation:

Schools have for many YEARS demonstrated the principles of Brownian motion using what is known as a smoke CELL. These cells consist of a lamp and lens which is PLACED on the STAGE of a microscope. A small amount of smoke is piped into the glass cell and the MOVEMENTS of the smoke particles are observed.

Discussion

32.	In case of elastic body , body regains its original size and shape an removal of external deforming force if and external force is
Answer» Answer: Deforming FORCE : An external force applied to a body which CHANGES its size or shape or both is CALLED deforming force. Perfectly Elastic body : A body is said to be perfectly elastic if it completely regains its ORIGINAL form when the deforming force is removed.

32.

In case of elastic body , body regains its original size and shape an removal of external deforming force if and external force is

Answer»

Answer:

Deforming FORCE : An external force applied to a body which CHANGES its size or shape or both is CALLED deforming force. Perfectly Elastic body : A body is said to be perfectly elastic if it completely regains its ORIGINAL form when the deforming force is removed.

Discussion

33.	the ratio of yhe average velocity of the train during a journey to the maximum velocity between 2 station is
Answer»

Discussion

34.	Please question the answer
Answer» ANSWER: dttifytofydhbohkbuguauuv Explanation: it is to yicrajmi hkgit. hjvuv o o o o o o

34.

Please question the answer

Answer»

ANSWER:

dttifytofydhbohkbuguauuv

Explanation:

it is to yicrajmi hkgit. hjvuv
o
o
o
o
o
o

Discussion

35.	Three Resistance of values 2 ohm, 3 Ohmand 5 ohmConnected in seriesacross20 VD.C supply calculateb)the power dissipated in each resistor
Answer» ANSWER: HOPE this answer will HELP U

35.

Three Resistance of values 2 ohm, 3 Ohmand 5 ohmConnected in seriesacross20 VD.C supply calculateb)the power dissipated in each resistor

Answer»

ANSWER:

HOPE this answer will HELP U

Discussion

36.	What is the principle of working of meter bridge?
Answer» The meter bridge principle is based on the Wheatstone Bridge circuit which says that if at any POINT or length (of a wire), the ratio of two RESISTANCES (say R1 and R2) is equal to the ratio of ANOTHER two resistances (say R3 and R4 where R4 is the unknown RESISTANCE), then there SHALL be no flow of current at that . Request: *PLEASE* *MARK* ME AS *BRAINLIEST* *ANSWER* *AND* *FOLLOW* ME.

36.

What is the principle of working of meter bridge?

Answer»

The meter bridge principle is based on the Wheatstone Bridge circuit which says that if at any POINT or length (of a wire), the ratio of two RESISTANCES (say R1 and R2) is equal to the ratio of ANOTHER two resistances (say R3 and R4 where R4 is the unknown RESISTANCE), then there SHALL be no flow of current at that .

Request:

PLEASE MARK ME AS BRAINLIEST ANSWER AND FOLLOW ME.

Discussion

37.	To which point does the capillary rise of a liquid happen against the gravitational force
Answer» Answer: The height to which capillary action will take water in a uniform circular tube (PICTURE to right) is LIMITED by surface tension and, of course, gravity. Not only does water tend to STICK together in a drop, it sticks to glass, CLOTH, organic tissues, soil, and, luckily, to the fibers in a paper TOWEL.

37.

To which point does the capillary rise of a liquid happen against the gravitational force

Answer»

Answer:

The height to which capillary action will take water in a uniform circular tube (PICTURE to right) is LIMITED by surface tension and, of course, gravity. Not only does water tend to STICK together in a drop, it sticks to glass, CLOTH, organic tissues, soil, and, luckily, to the fibers in a paper TOWEL.

Discussion

38.	an ac voltage of peak value is 20V is connected in series with a silicon diode and load resistance of 500ohm.if foreward resistance is 10ohm then find peak current through diode and peak output voltage
Answer» Answer: Communication is simply the act of transferring information from one PLACE, PERSON or group to another. Every communication INVOLVES (at least) one sender, a message and a recipient. ... These include our emotions, the cultural SITUATION, the medium used to communicate, and even our location.

38.

an ac voltage of peak value is 20V is connected in series with a silicon diode and load resistance of 500ohm.if foreward resistance is 10ohm then find peak current through diode and peak output voltage

Answer»

Answer:

Communication is simply the act of transferring information from one PLACE, PERSON or group to another. Every communication INVOLVES (at least) one sender, a message and a recipient. ... These include our emotions, the cultural SITUATION, the medium used to communicate, and even our location.

Discussion

39.	2mol N2 ও 1 mol NH3 এর মধ্যে কোনটিতে পরমাণুর সংখ্যা বেশি?
Answer» EXPLANATION: PROBLEM thakle TEXT KORO

39.

2mol N2 ও 1 mol NH3 এর মধ্যে কোনটিতে পরমাণুর সংখ্যা বেশি?

Answer»

EXPLANATION:

PROBLEM thakle TEXT KORO

Discussion

40.	a car is running at a speed of 80kmph if it is to be stopped at 25 metre distance what is the average deceleration required
Answer» Answer: Communication is simply the act of transferring information from one place, person or group to another. Every communication involves (at least) one sender, a MESSAGE and a RECIPIENT. ... These include our emotions, the CULTURAL situation, the MEDIUM used to communicate, and EVEN our location.

40.

a car is running at a speed of 80kmph if it is to be stopped at 25 metre distance what is the average deceleration required

Answer»

Answer:

Communication is simply the act of transferring information from one place, person or group to another. Every communication involves (at least) one sender, a MESSAGE and a RECIPIENT. ... These include our emotions, the CULTURAL situation, the MEDIUM used to communicate, and EVEN our location.

Discussion

41.	Write any two advantage of semiconductor explain forward biased P-N junction
Answer» Answer: semiconductors are shock-proof. Moreover, they are smaller in SIZE and OCCUPY less space and consume less power. Compared to VACUUM tubes, semiconductors are extremely sensitive to TEMPERATURE and radiation. Semiconductors are cheaper than vacuum diodes and have an unlimited shelf life. Explanation: hope it helps you mark my answer BRAINLIST please!!

41.

Write any two advantage of semiconductor explain forward biased P-N junction

Answer»

Answer:

semiconductors are shock-proof. Moreover, they are smaller in SIZE and OCCUPY less space and consume less power. Compared to VACUUM tubes, semiconductors are extremely sensitive to TEMPERATURE and radiation. Semiconductors are cheaper than vacuum diodes and have an unlimited shelf life.

Explanation:

hope it helps you

mark my answer BRAINLIST please!!

Discussion

42.	31.Four electric dipoles each of charges te are placedinside a sphere. The total electric flux of comingout of the sphere is :-4e(1) zero(2)08e(3)(4) None of these80
Answer» ANSWER: ZERO is the electric flux coming out zero as net charge INSIDE is zero . formula for flux inside=Q/€° as each dipole has both +ve and -ve charge than they will cancel each other and net charge will be zero inside.

42.

31.Four electric dipoles each of charges te are placedinside a sphere. The total electric flux of comingout of the sphere is :-4e(1) zero(2)08e(3)(4) None of these80

Answer»

ANSWER:

ZERO is the electric flux coming out zero as net charge INSIDE is zero .

formula for flux inside=Q/€°

as each dipole has both +ve and -ve charge than they will cancel each other and net charge will be zero inside.

Discussion

43.	21.Four charges +q, -4, +q, q are placed in order onthe four consecutive corners of a square of side 'a'.The work done in interchanging the positions of anytwo neighbouring charges of opposite sign is :-q?(4+2,2)(1)q? (-4+1D)4πε a a(2) 41€,aq?(4-212)q*_(4+12)(3)4περα(4) 41€, a
Answer» EXPLANATION: bsbzbzbzbbzbzbzbzbzbz

43.

21.Four charges +q, -4, +q, q are placed in order onthe four consecutive corners of a square of side 'a'.The work done in interchanging the positions of anytwo neighbouring charges of opposite sign is :-q?(4+2,2)(1)q? (-4+1D)4πε a a(2) 41€,aq?(4-212)q*_(4+12)(3)4περα(4) 41€, a

Answer»

EXPLANATION:

bsbzbzbzbbzbzbzbzbzbz

Discussion

44.	A flash of lightning carries 20c of charge which flows for 0.01 s. what is the current
Answer» ANSWER is what I KNOW PLEASE

Discussion

45.	What is Velocy??????
Answer» The velocity of an OBJECT is the rate of change of its POSITION with RESPECT to a frame of reference, and is a function of TIME. Velocity is a physical vector quantity; both MAGNITUDE and direction are needed to define it.

Discussion

46.	An electron with charge e is at rest in an electric field E then the electric force acting on it is?a)Eeb)E/ec)zerod)1/Ee
Answer» ANSWER: i HOPE it will HELP you EXPLANATION: thullu

46.

An electron with charge e is at rest in an electric field E then the electric force acting on it is?a)Eeb)E/ec)zerod)1/Ee

Answer»

ANSWER:

i HOPE it will HELP you

EXPLANATION:

thullu

Discussion

47.	Find the electric field at point c
Answer» ANSWER: I will be really OBLIGED if prodie answer to me if u GET thanku very MUCH

47.

Find the electric field at point c

Answer»

ANSWER:

I will be really OBLIGED if prodie answer to me if u GET thanku very MUCH

Discussion

48.	What is the meaning of fold length here...?
Answer» EXPLANATION: Its FOCAL LENGTH not FOLD length

48.

What is the meaning of fold length here...?

Answer»

EXPLANATION:

Its FOCAL LENGTH not FOLD length

Discussion

49.	Draw and explain the detailed block diagram of digital clock circuit
Answer» ANSWER: Answer is this Explanation: THANK you

49.

Draw and explain the detailed block diagram of digital clock circuit

Answer»

ANSWER:

Answer is this

Explanation:

THANK you

Discussion

50.	Motion lesson running notes class 9
Answer» Answer: i SEND NOTES iam 8TH CLASS

50.

Motion lesson running notes class 9

Answer»

Answer:

i SEND NOTES iam 8TH CLASS

Discussion

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Given:-

To FIND:-

Solution:-

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I hope this helps U PLEASE MARK my answer BRAINLIST

What is potential difference

Convert the values ofof universal gravitationalfrom MKS to intoconstant​

7. Two wires of the same length and the same resistivityare connected in parallel. Find the ratio of their areas ofcross section if the ratio of their electrical resistancesis 4:3​

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GIVEN:-

To FIND:-

Solution:-

⠀→ A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of 3.0 m s⁻² for 8.0 s. How far does the boat travel during this time ?​

Solution -

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Give the dimensions of permeability of free space​

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CURRENT i = 0.5 A

Resistance R =10 ohm

Potential DIFFERENCES v

By ohm's LAW

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Opposite of gravity is (When the object is kept on surface)​

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the ratio of yhe average velocity of the train during a journey to the maximum velocity between 2 station is​

Please question the answer​

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What is the principle of working of meter bridge?​

PLEASE MARK ME AS BRAINLIEST ANSWER AND FOLLOW ME.

To which point does the capillary rise of a liquid happen against the gravitational force

an ac voltage of peak value is 20V is connected in series with a silicon diode and load resistance of 500ohm.if foreward resistance is 10ohm then find peak current through diode and peak output voltage

2mol N2 ও 1 mol NH3 এর মধ্যে কোনটিতে পরমাণুর সংখ্যা বেশি?

a car is running at a speed of 80kmph if it is to be stopped at 25 metre distance what is the average deceleration required

Write any two advantage of semiconductor explain forward biased P-N junction

hope it helps you

mark my answer BRAINLIST please!!

31.Four electric dipoles each of charges te are placedinside a sphere. The total electric flux of comingout of the sphere is :-4e(1) zero(2)08e(3)(4) None of these80​

21.Four charges +q, -4, +q, q are placed in order onthe four consecutive corners of a square of side 'a'.The work done in interchanging the positions of anytwo neighbouring charges of opposite sign is :-q?(4+2,2)(1)q? (-4+1D)4πε a a(2) 41€,aq?(4-212)q*_(4+12)(3)4περα(4) 41€, a​

A flash of lightning carries 20c of charge which flows for 0.01 s. what is the current​

What is Velocy??????​

An electron with charge e is at rest in an electric field E then the electric force acting on it is?a)Eeb)E/ec)zerod)1/Ee​

Find the electric field at point c​

What is the meaning of fold length here...?​

Draw and explain the detailed block diagram of digital clock circuit

Motion lesson running notes class 9​

Evalute the equation

Find the magnitude of a force if its x-component is 10N and y-component is 3N

a sound wave has a frequency of 1000 hertz and wavelength of 50 cm how long will it take to travel a distance of 500m?

2. 9. Calculate the potential difference to be appliedacross a conductor of resistance 20ohms so that acurrent of 2 A may flow through it.

how is the kinetic energy of a moving cart affected if (a) it's mass is doubled (b) it's velocity is reduced to 1/3rd of the initial velocity. my snap is himangi4100

Is cyclone vulnerable to India ?

(12)What do you mean by relative permittivity of a medium?

Define critical velocity obtain an expression for the critical Satellite.

a aluminium has a diameter of 0.5mm and resistivity of 1.6×10(-8) ohm metar. what will be the length of this wire to make its resistance 10mm

A particle moves 100m with a speed, 2m.s-¹ and then next200m with a speed, 3m.s-¹. Find its average speed. Steps plz.

7. Two wires of the same length and the same resistivityare connected in parallel. Find the ratio of their areas ofcross section if the ratio of their electrical resistancesis 4:3

Find electric field on 0 by c

Two equal point charges(10^-3) are placed 1 cm apart in medium of dielectric constant K= 51) find the interaction force between the point charges 2)net force on any of the charge

Draw a graph for an object moving at a constant (but not uniform) acceleration. Explain the reason for the shape of the slope in the graph.

Convert the values ofof universal gravitationalfrom MKS to intoconstant

7. Two wires of the same length and the same resistivityare connected in parallel. Find the ratio of their areas ofcross section if the ratio of their electrical resistancesis 4:3

⠀→ A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of 3.0 m s⁻² for 8.0 s. How far does the boat travel during this time ?

(9)What is microscope and telescope?

Give the dimensions of permeability of free space

11. Initial velocity of particle is 2 m/s, the maximumvelocity of particle from t=0 to t = 20 sec is :1216 208 10(1) 20 m/s(3) 22 m/s(2) 18 m/s(4) 24 m/s

A current or 0.5A is flowing throughthe resistance of l0 ohm. Find thePotential difference between itsends.

|â +12.If= 1, the angle between â and ſ is:la-61(1) 0°(2) 45°(3) 90°(4) 60°

Opposite of gravity is (When the object is kept on surface)

In case of elastic body , body regains its original size and shape an removal of external deforming force if and external force is

the ratio of yhe average velocity of the train during a journey to the maximum velocity between 2 station is

Please question the answer

Three Resistance of values 2 ohm, 3 Ohmand 5 ohmConnected in seriesacross20 VD.C supply calculateb)the power dissipated in each resistor

What is the principle of working of meter bridge?

31.Four electric dipoles each of charges te are placedinside a sphere. The total electric flux of comingout of the sphere is :-4e(1) zero(2)08e(3)(4) None of these80

21.Four charges +q, -4, +q, q are placed in order onthe four consecutive corners of a square of side 'a'.The work done in interchanging the positions of anytwo neighbouring charges of opposite sign is :-q?(4+2,2)(1)q? (-4+1D)4πε a a(2) 41€,aq?(4-212)q*_(4+12)(3)4περα(4) 41€, a

A flash of lightning carries 20c of charge which flows for 0.01 s. what is the current

What is Velocy??????

An electron with charge e is at rest in an electric field E then the electric force acting on it is?a)Eeb)E/ec)zerod)1/Ee

Find the electric field at point c

What is the meaning of fold length here...?

Motion lesson running notes class 9