13232 + Interview Questions in Physics

1.	The strength of the magnetic field at the centre of a current carrying circular coil depends on
Answer» The strength of the magnetic field at the centre of a current carrying circular coil depends on

Discussion

2.	The mass of a planet is 6×1024 kg and its diameter is 12.8×103 km. If the value of gravitational constant be 6.7×10−11Nm2/kg2, calculate the value of acceleration due to gravity on the surface of the planet. What planet could this be ?
Answer» The mass of a planet is $6 \times 10^{24}$ kg and its diameter is $12.8 \times 10^{3}$ km. If the value of gravitational constant be $6.7 \times 10^{- 11} N m^{2} / k g^{2}$ , calculate the value of acceleration due to gravity on the surface of the planet. What planet could this be ?

Discussion

3.	For moon, g=1.67 ms−2 and R=1.74×106 m. The Moon's mass is ___ ×1022 kg.7.6
Answer» For moon, $g = 1.67 m s^{- 2}$ and $R = 1.74 \times 10^{6} m$ . The Moon's mass is ___ $\times 10^{22} k g$ . 7.6

Discussion

4.	Name the material used for making the armature of an electric bell. Give a reason for your answer.
Answer» Name the material used for making the armature of an electric bell. Give a reason for your answer.

Discussion

5.	Water moves down an energy gradient. This can be represented by -
Answer» Water moves down an energy gradient. This can be represented by -

Discussion

6.	How much momentum will a dumbbell of mass 10 kg transfer to the floor if it falls from a height of 80 cm (assume that the dumbbell stops after hitting the ground)? Take g = 10 ms−2
Answer» How much momentum will a dumbbell of mass $10 k g$ transfer to the floor if it falls from a height of $80 c m$ (assume that the dumbbell stops after hitting the ground)? Take $g = 10 m s^{- 2}$

Discussion

7.	A ball thrown vertically reaches the throwing point after 6 s. If the time taken to reach the highest point by the ball is x and the highest point (in metres) achieved by the ball from the ground is y, what is the value of (x+y)? (Take g=9.8 ms−2)47.1
Answer» A ball thrown vertically reaches the throwing point after 6 s. If the time taken to reach the highest point by the ball is $x$ and the highest point (in metres) achieved by the ball from the ground is $y$ , what is the value of $(x + y)$ ? (Take $g = 9.8 m s^{- 2}$ ) 47.1

Discussion

8.	An engine is moving with a velocity 44 m/s. After applying the brakes, it stops after covering a distance of 121 m. Calculate retardation and time taken by the engine to stop.
Answer» An engine is moving with a velocity 44 m/s. After applying the brakes, it stops after covering a distance of 121 m. Calculate retardation and time taken by the engine to stop.

Discussion

9.	What is elements ?
Answer» What is elements ?

Discussion

10.	The relative densities of four liquids P, Q, R and S are 1.26, 1.0, 0.84 and 13.6 respectively. An object is floated in all these liquids, one by one. In which liquid the object will float with its maximum volume submerged under the liquid ? (a) P (b) Q (c) R (d) S
Answer» The relative densities of four liquids P, Q, R and S are 1.26, 1.0, 0.84 and 13.6 respectively. An object is floated in all these liquids, one by one. In which liquid the object will float with its maximum volume submerged under the liquid ? (a) P (b) Q (c) R (d) S

Discussion

11.	What is the weight of a block of mass 5 kg at the centre of the Earth? (g=9.8 m s−2)
Answer» What is the weight of a block of mass $5 k g$ at the centre of the Earth? $(g = 9.8 m s^{- 2}$ )

Discussion

12.	What is the magnitude of the gravitational force exerted by a 15Kg mass on a 25Kg mass separated by a distance of 25cm? What is the acceleration produced in each mass?
Answer» What is the magnitude of the gravitational force exerted by a 15Kg mass on a 25Kg mass separated by a distance of 25cm? What is the acceleration produced in each mass?

Discussion

13.	If action is always equal to reaction, how is a horse able to pull a cart?
Answer» If action is always equal to reaction, how is a horse able to pull a cart?

Discussion

14.	What length of water column in a given tube has equivalent pressure to 0.86 m of mercury column? The density of mercury is 13.6 times the density of water.
Answer» What length of water column in a given tube has equivalent pressure to $0.86 m$ of mercury column? The density of mercury is $13.6$ times the density of water.

Discussion

15.	Two containers A and B have the same volume. Container 'A' contains 5 mole of oxygen gas. Container 'B' contains 3 moles of He gas and 2 mole of CH4 gas. Both the containers are separately kept in vaccum at the same temperature. Both the containers have very small orifices of the same area through which the gases leak out. The rate of diffusion of O2 is how many times the rate of diffusion of He and CH4 mixture.
Answer» Two containers A and B have the same volume. Container 'A' contains 5 mole of oxygen gas. Container 'B' contains 3 moles of He gas and 2 mole of $C H_{4}$ gas. Both the containers are separately kept in vaccum at the same temperature. Both the containers have very small orifices of the same area through which the gases leak out. The rate of diffusion of $O_{2}$ is how many times the rate of diffusion of He and $C H_{4}$ mixture.

15.

Two containers A and B have the same volume. Container 'A' contains 5 mole of oxygen gas. Container 'B' contains 3 moles of He gas and 2 mole of CH4 gas. Both the containers are separately kept in vaccum at the same temperature. Both the containers have very small orifices of the same area through which the gases leak out. The rate of diffusion of O2 is how many times the rate of diffusion of He and CH4 mixture.

Answer»

Two containers A and B have the same volume. Container 'A' contains 5 mole of oxygen gas. Container 'B' contains 3 moles of He gas and 2 mole of $C H_{4}$ gas. Both the containers are separately kept in vaccum at the same temperature. Both the containers have very small orifices of the same area through which the gases leak out. The rate of diffusion of $O_{2}$ is how many times the rate of diffusion of He and $C H_{4}$ mixture.

Discussion

16.	Estimate the work done by the boy to pull a trolley at the angle of θ from the ground. [3 MARKS]
Answer» Estimate the work done by the boy to pull a trolley at the angle of θ from the ground. [3 MARKS]

Discussion

17.	What will be the value of g at the centre of the earth?
Answer» What will be the value of g at the centre of the earth?

Discussion

18.	A force caused an acceleration of 10ms-2 in a body of mass 500g . What acceleration will be caused by the same force in a body of mass 5kg.
Answer» A force caused an acceleration of 10ms-2 in a body of mass 500g . What acceleration will be caused by the same force in a body of mass 5kg.

Discussion

19.	What is inertia?Give three examples.And please whoever teacher will give the answer please tell the most simple explanation.
Answer» What is inertia?Give three examples.And please whoever teacher will give the answer please tell the most simple explanation.

Discussion

20.	What is the cause of friction is it because of the irregularities in the surfaces or because of some electrostatic forces?
Answer» What is the cause of friction is it because of the irregularities in the surfaces or because of some electrostatic forces?

Discussion

21.	What is a megaphone ? Name the principle on which a megaphone works.
Answer» What is a megaphone ? Name the principle on which a megaphone works.

21.

What is a megaphone ? Name the principle on which a megaphone works.

Answer»

What is a megaphone ? Name the principle on which a megaphone works.

Discussion

22.	The refractive index of water is 1.33.The speed of light in water is?
Answer» The refractive index of water is 1.33.The speed of light in water is?

Discussion

23.	The work done in shifting a baggage from the first floor of a building to the second floor is 100 J. The change in gravitational potential energy of the baggage is:
Answer» The work done in shifting a baggage from the first floor of a building to the second floor is $100 J$ . The change in gravitational potential energy of the baggage is:

Discussion

24.	name the properties of bodies to resist a change in their velocities.
Answer» name the properties of bodies to resist a change in their velocities.

Discussion

25.	Why earth is not moving towards the sun by gravitational force?
Answer» Why earth is not moving towards the sun by gravitational force?

Discussion

26.	What is the direction of air pressure on a vertical wall?
Answer» What is the direction of air pressure on a vertical wall?

Discussion

27.	The rate of change in momentum is directly proportional to the:
Answer» The rate of change in momentum is directly proportional to the:

Discussion

28.	How to find the number of protons, neutron, and electrons.
Answer» How to find the number of protons, neutron, and electrons.

Discussion

29.	Draw the velocity-time graph for a particle travelling with uniform acceleration ‘a’ and an initial velocity ‘u’. Show how you would find the displacement in a given time. [3 MARKS]
Answer» Draw the velocity-time graph for a particle travelling with uniform acceleration ‘a’ and an initial velocity ‘u’. Show how you would find the displacement in a given time. [3 MARKS]

Discussion

30.	Find the initial velocity of a car which is stopped in 10sec by applying brakes . the retardation due to brakes is 2.5 m/s2
Answer» Find the initial velocity of a car which is stopped in 10sec by applying brakes . the retardation due to brakes is 2.5 m/s²

Discussion

31.	A body moving in a straight line with constant retardation"a"loses 3/4 of initial velocity u.what is its time of motion? A.3u/4 B.3u/4a C 4u/3 D.4u/3a
Answer» A body moving in a straight line with constant retardation"a"loses 3/4 of initial velocity u.what is its time of motion? A.3u/4 B.3u/4a C 4u/3 D.4u/3a

31.

A body moving in a straight line with constant retardation"a"loses 3/4 of initial velocity u.what is its time of motion? A.3u/4 B.3u/4a C 4u/3 D.4u/3a

Answer»

A body moving in a straight line with constant retardation"a"loses 3/4 of initial velocity u.what is its time of motion?

A.3u/4

B.3u/4a

C 4u/3

D.4u/3a

Discussion

32.	Wat is buoyancy and how it works
Answer» Wat is buoyancy and how it works

Discussion

33.	The velocity-time graph AC of a moving particle is shown in the figure below. The acceleration of the particle is:
Answer» The velocity-time graph AC of a moving particle is shown in the figure below. The acceleration of the particle is:

33.

The velocity-time graph AC of a moving particle is shown in the figure below. The acceleration of the particle is:

Answer»

The velocity-time graph AC of a moving particle is shown in the figure below. The acceleration of the particle is:

Discussion

34.	A girl bends to touch her toes.Is the motion of her head an example of uniform motion or accelerated motion.explain your answers
Answer» A girl bends to touch her toes.Is the motion of her head an example of uniform motion or accelerated motion.explain your answers

Discussion

35.	Why we feel weightless in a lift which is going to the lower floor?
Answer» Why we feel weightless in a lift which is going to the lower floor?

Discussion

36.	Find the motion of the train if the coin which is tossed falls behind the person.
Answer» Find the motion of the train if the coin which is tossed falls behind the person.

Discussion

37.	Use the following information to answer the next question. Akram has a piece of thread. He measures the length of a table using this thread. He has to place the thread eight times along the length of the table to measure its length. Then, he folds the thread twice at its mid point and again measures the length of the same table. How many times does Akram have to place the folded thread along the length of the table?
Answer» Use the following information to answer the next question. Akram has a piece of thread. He measures the length of a table using this thread. He has to place the thread eight times along the length of the table to measure its length. Then, he folds the thread twice at its mid point and again measures the length of the same table. How many times does Akram have to place the folded thread along the length of the table?

37.

Use the following information to answer the next question. Akram has a piece of thread. He measures the length of a table using this thread. He has to place the thread eight times along the length of the table to measure its length. Then, he folds the thread twice at its mid point and again measures the length of the same table. How many times does Akram have to place the folded thread along the length of the table?

Answer»

Use the following information to answer the next question.

Akram has a piece of thread. He measures the length of a table using this thread. He has to place the thread eight times along the length of the table to measure its length. Then, he folds the thread twice at its mid point and again measures the length of the same table.

How many times does Akram have to place the folded thread along the length of the table?

Discussion

38.	Shishir was playing with a spring. He was compressing and releasing it. Suddenly he noticed that a ball when kept on a spring attains a certain height after it is compressed and released. In which of the following heights attained by the ball, Shishir has to spend maximum of his energy?
Answer» Shishir was playing with a spring. He was compressing and releasing it. Suddenly he noticed that a ball when kept on a spring attains a certain height after it is compressed and released. In which of the following heights attained by the ball, Shishir has to spend maximum of his energy?

Discussion

39.	The patient underwent eight hours _________ surgery ____________ his heart.
Answer» The patient underwent eight hours _________ surgery ____________ his heart.

Discussion

40.	A man first swims in sea water and then in river water. (i) Compare the weights of sea water and river water displaced by him. (ii) Where does he find it easier to swim and why?
Answer» A man first swims in sea water and then in river water. (i) Compare the weights of sea water and river water displaced by him. (ii) Where does he find it easier to swim and why?

Discussion

41.	If we want to form virtual, erect and enlarged image. Then which mirror and position should we choose?
Answer» If we want to form virtual, erect and enlarged image. Then which mirror and position should we choose?

Discussion

42.	1∘C rise in temperature is equal to a rise of.
Answer» $1^{\circ} C$ rise in temperature is equal to a rise of.

Discussion

43.	Absolute refractive index of glass is 1.5 and refractive index of glass with respect to water is 1.125. The absolute refractive index of water is ______
Answer» Absolute refractive index of glass is $1.5$ and refractive index of glass with respect to water is $1.125$ . The absolute refractive index of water is ______

Discussion

44.	A light wire AB of length 10 cm can slide on a vertical frame as shown in figure. There is a film of soap solution trapped between the frame and the wire. Find the load W that should be suspended from the wire to keep it in equilibrium. Neglect friction. Surface tension of soap solution = 25 dyne cm-1. Take g = 10 m s-2
Answer» A light wire AB of length 10 cm can slide on a vertical frame as shown in figure. There is a film of soap solution trapped between the frame and the wire. Find the load W that should be suspended from the wire to keep it in equilibrium. Neglect friction. Surface tension of soap solution = 25 dyne cm^-1. Take g = 10 m s^-2

44.

A light wire AB of length 10 cm can slide on a vertical frame as shown in figure. There is a film of soap solution trapped between the frame and the wire. Find the load W that should be suspended from the wire to keep it in equilibrium. Neglect friction. Surface tension of soap solution = 25 dyne cm-1. Take g = 10 m s-2

Answer»

A light wire AB of length 10 cm can slide on a vertical frame as shown in figure. There is a film of soap solution trapped between the frame and the wire. Find the load W that should be suspended from the wire to keep it in equilibrium. Neglect friction. Surface tension of soap solution = 25 dyne cm^-1. Take g = 10 m s^-2

Discussion

45.	In the given mirror: C – the centre of the sphere to which the mirror is part of F – the focus of the mirror P – pole of the mirror A – a point on the mirror D – a point on the principal axis. If a ray of light starts from C and is incident on the mirror at the point of incidence A, then the reflected ray will pass through which point?
Answer» In the given mirror: C – the centre of the sphere to which the mirror is part of F – the focus of the mirror P – pole of the mirror A – a point on the mirror D – a point on the principal axis. If a ray of light starts from C and is incident on the mirror at the point of incidence A, then the reflected ray will pass through which point?

45.

In the given mirror: C – the centre of the sphere to which the mirror is part of F – the focus of the mirror P – pole of the mirror A – a point on the mirror D – a point on the principal axis. If a ray of light starts from C and is incident on the mirror at the point of incidence A, then the reflected ray will pass through which point?

Answer»

In the given mirror:
C – the centre of the sphere to which the mirror is part of
F – the focus of the mirror
P – pole of the mirror
A – a point on the mirror
D – a point on the principal axis.
If a ray of light starts from C and is incident on the mirror at the point of incidence A, then the reflected ray will pass through which point?

Discussion

46.	Two bodies of mass 10 kg and 12 kg are falling freely. What is the acceleration produced in the bodies due to force of gravity? [2 MARKS]
Answer» Two bodies of mass 10 kg and 12 kg are falling freely. What is the acceleration produced in the bodies due to force of gravity? [2 MARKS]

Discussion

47.	An object 20 cm from a convex lens forms a virtual image 15 cm behind the lens. The focal length of the lens is
Answer» An object $20 c m$ from a convex lens forms a virtual image $15 c m$ behind the lens. The focal length of the lens is

Discussion

48.	Define power. A pair of bullocks exert a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field? [3 MARKS]
Answer» Define power. A pair of bullocks exert a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field? [3 MARKS]

Discussion

49.	In loading a truck, a man lifts boxes of 100 N each through a height of 1.5 m. (a) How much work does he do in lifting one box ? (b) How much energy is transferred when one box is lifted ? (c) If the man lifts 4 boxes per minute, at what power is he working ? (g = 10 m s−2)
Answer» In loading a truck, a man lifts boxes of 100 N each through a height of 1.5 m. (a) How much work does he do in lifting one box ? (b) How much energy is transferred when one box is lifted ? (c) If the man lifts 4 boxes per minute, at what power is he working ? (g = 10 m $s^{- 2}$ )

49.

In loading a truck, a man lifts boxes of 100 N each through a height of 1.5 m. (a) How much work does he do in lifting one box ? (b) How much energy is transferred when one box is lifted ? (c) If the man lifts 4 boxes per minute, at what power is he working ? (g = 10 m s−2)

Answer»

In loading a truck, a man lifts boxes of 100 N each through a height of 1.5 m.

(a) How much work does he do in lifting one box ?

(b) How much energy is transferred when one box is lifted ?

(c) If the man lifts 4 boxes per minute, at what power is he working ? (g = 10 m $s^{- 2}$ )

Discussion

50.	Identify the part of the scale, which if is the center of gravity, will cause the scale to fall from the table.
Answer» Identify the part of the scale, which if is the center of gravity, will cause the scale to fall from the table.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The strength of the magnetic field at the centre of a current carrying circular coil depends on

The mass of a planet is 6×1024 kg and its diameter is 12.8×103 km. If the value of gravitational constant be 6.7×10−11Nm2/kg2, calculate the value of acceleration due to gravity on the surface of the planet. What planet could this be ?

For moon, g=1.67 ms−2 and R=1.74×106 m. The Moon's mass is ___ ×1022 kg.7.6

Name the material used for making the armature of an electric bell. Give a reason for your answer.

Water moves down an energy gradient. This can be represented by -

How much momentum will a dumbbell of mass 10 kg transfer to the floor if it falls from a height of 80 cm (assume that the dumbbell stops after hitting the ground)? Take g = 10 ms−2

A ball thrown vertically reaches the throwing point after 6 s. If the time taken to reach the highest point by the ball is x and the highest point (in metres) achieved by the ball from the ground is y, what is the value of (x+y)? (Take g=9.8 ms−2)47.1

An engine is moving with a velocity 44 m/s. After applying the brakes, it stops after covering a distance of 121 m. Calculate retardation and time taken by the engine to stop.

What is elements ?

The relative densities of four liquids P, Q, R and S are 1.26, 1.0, 0.84 and 13.6 respectively. An object is floated in all these liquids, one by one. In which liquid the object will float with its maximum volume submerged under the liquid ? (a) P (b) Q (c) R (d) S

What is the weight of a block of mass 5 kg at the centre of the Earth? (g=9.8 m s−2)

What is the magnitude of the gravitational force exerted by a 15Kg mass on a 25Kg mass separated by a distance of 25cm? What is the acceleration produced in each mass?

If action is always equal to reaction, how is a horse able to pull a cart?

What length of water column in a given tube has equivalent pressure to 0.86 m of mercury column? The density of mercury is 13.6 times the density of water.

Estimate the work done by the boy to pull a trolley at the angle of θ from the ground. [3 MARKS]

What will be the value of g at the centre of the earth?

A force caused an acceleration of 10ms-2 in a body of mass 500g . What acceleration will be caused by the same force in a body of mass 5kg.

What is inertia?Give three examples.And please whoever teacher will give the answer please tell the most simple explanation.

What is the cause of friction is it because of the irregularities in the surfaces or because of some electrostatic forces?

What is a megaphone ? Name the principle on which a megaphone works.

The refractive index of water is 1.33.The speed of light in water is?

The work done in shifting a baggage from the first floor of a building to the second floor is 100 J. The change in gravitational potential energy of the baggage is:

name the properties of bodies to resist a change in their velocities.

Why earth is not moving towards the sun by gravitational force?

What is the direction of air pressure on a vertical wall?

The rate of change in momentum is directly proportional to the:

How to find the number of protons, neutron, and electrons.

Draw the velocity-time graph for a particle travelling with uniform acceleration ‘a’ and an initial velocity ‘u’. Show how you would find the displacement in a given time. [3 MARKS]

Find the initial velocity of a car which is stopped in 10sec by applying brakes . the retardation due to brakes is 2.5 m/s2

A body moving in a straight line with constant retardation"a"loses 3/4 of initial velocity u.what is its time of motion? A.3u/4 B.3u/4a C 4u/3 D.4u/3a

Wat is buoyancy and how it works

The velocity-time graph AC of a moving particle is shown in the figure below. The acceleration of the particle is:

A girl bends to touch her toes.Is the motion of her head an example of uniform motion or accelerated motion.explain your answers

Why we feel weightless in a lift which is going to the lower floor?

Find the motion of the train if the coin which is tossed falls behind the person.

Shishir was playing with a spring. He was compressing and releasing it. Suddenly he noticed that a ball when kept on a spring attains a certain height after it is compressed and released. In which of the following heights attained by the ball, Shishir has to spend maximum of his energy?

The patient underwent eight hours _________ surgery ____________ his heart.

A man first swims in sea water and then in river water. (i) Compare the weights of sea water and river water displaced by him. (ii) Where does he find it easier to swim and why?

If we want to form virtual, erect and enlarged image. Then which mirror and position should we choose?

1∘C rise in temperature is equal to a rise of.

Absolute refractive index of glass is 1.5 and refractive index of glass with respect to water is 1.125. The absolute refractive index of water is ______

Two bodies of mass 10 kg and 12 kg are falling freely. What is the acceleration produced in the bodies due to force of gravity? [2 MARKS]

An object 20 cm from a convex lens forms a virtual image 15 cm behind the lens. The focal length of the lens is

Define power. A pair of bullocks exert a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field? [3 MARKS]

In loading a truck, a man lifts boxes of 100 N each through a height of 1.5 m. (a) How much work does he do in lifting one box ? (b) How much energy is transferred when one box is lifted ? (c) If the man lifts 4 boxes per minute, at what power is he working ? (g = 10 m s−2)

Identify the part of the scale, which if is the center of gravity, will cause the scale to fall from the table.

The patient underwent eight hours _ surgery ____ his heart.