13232 + Interview Questions in Physics

1.	A box follows a zigzag path to reach from point A to B. The actual length of the path is 5 m and the length of the straight line joining the two points is 2 m. If a force of 5 N acts on the box along its path then the work done on the box by the force is:
Answer» A box follows a zigzag path to reach from point A to B. The actual length of the path is 5 m and the length of the straight line joining the two points is 2 m. If a force of 5 N acts on the box along its path then the work done on the box by the force is:

Discussion

2.	At what distance from a concave mirror of focal length 25 cm shouldan object be placed so that the size of the image is equal to the size of the object
Answer» At what distance from a concave mirror of focal length 25 cm shouldan object be placed so that the size of the image is equal to the size of the object

Discussion

3.	A constant force acts on a body of mass 5kgfor a duration of 2s. It increases the object's velocity from 3m/s to 7m/s . Find the magnitude of the force that was applied for a duration of 5s, what would be the final velocity of the object?
Answer» A constant force acts on a body of mass 5kgfor a duration of 2s. It increases the object's velocity from 3m/s to 7m/s . Find the magnitude of the force that was applied for a duration of 5s, what would be the final velocity of the object?

Discussion

4.	So it takes ugsecs to go up, how long will it take to come down?(as mentioned there is no air)
Answer» So it takes $\frac{u}{g}$ secs to go up, how long will it take to come down?(as mentioned there is no air)

Discussion

5.	Name the principle on which a soundboard works.
Answer» Name the principle on which a soundboard works.

Discussion

6.	Which of the following frequency of sound can be generated by a vibrating simple pendulum as well as by the vibrating vocal cords of a rhinoceros ? (a) 5 kHz (b) 25 Hz (c) 10 Hz (d) 15,000 Hz
Answer» Which of the following frequency of sound can be generated by a vibrating simple pendulum as well as by the vibrating vocal cords of a rhinoceros ? (a) 5 kHz (b) 25 Hz (c) 10 Hz (d) 15,000 Hz

6.

Which of the following frequency of sound can be generated by a vibrating simple pendulum as well as by the vibrating vocal cords of a rhinoceros ? (a) 5 kHz (b) 25 Hz (c) 10 Hz (d) 15,000 Hz

Answer»

Which of the following frequency of sound can be generated by a vibrating simple pendulum as well as by the vibrating vocal cords of a rhinoceros ?

(a) 5 kHz

(b) 25 Hz

(c) 10 Hz

(d) 15,000 Hz

Discussion

7.	Which of the following quantities is a scalar quantity?
Answer» Which of the following quantities is a scalar quantity?

Discussion

8.	Name the two kinds of waves in form of which sound travels in a medium.
Answer» Name the two kinds of waves in form of which sound travels in a medium.

Discussion

9.	How does the pressure exerted by a solid and a fluid differ?
Answer» How does the pressure exerted by a solid and a fluid differ?

Discussion

10.	How to find the speed at which galaxy move ?
Answer» How to find the speed at which galaxy move ?

Discussion

11.	Water expands when it is cooled from ___∘C to ___∘C, this is known as the anomalous expansion of water.
Answer» Water expands when it is cooled from ___ $^{\circ} C$ to ___ $^{\circ} C$ , this is known as the anomalous expansion of water.

Discussion

12.	Why can an x-ray telescope not based on the earth
Answer» Why can an x-ray telescope not based on the earth

Discussion

13.	Why does an object increase its energy when raised through a height?
Answer» Why does an object increase its energy when raised through a height?

Discussion

14.	A mass of 10 kg is given. Find its weight: 1.on the surface of the earth 2.on the surface of the moon 3.at the centre of the earth
Answer» A mass of 10 kg is given. Find its weight: 1.on the surface of the earth 2.on the surface of the moon 3.at the centre of the earth

Discussion

15.	Explain the following: (I) Inertia of rest (ii) Inertia of motion (iii) Inertia of direction
Answer» Explain the following: (I) Inertia of rest (ii) Inertia of motion (iii) Inertia of direction

Discussion

16.	A ball of mass 2kg is dropped from a height get height . What is the work done after 2sec after the ball is dropped?
Answer» A ball of mass 2kg is dropped from a height get height . What is the work done after 2sec after the ball is dropped?

Discussion

17.	A car has a uniform acceleration of 4 ms-2 . What distance will it cover in 10 seconds after the start?
Answer» A car has a uniform acceleration of 4 ms^{-2 .} What distance will it cover in 10 seconds after the start?

17.

A car has a uniform acceleration of 4 ms-2 . What distance will it cover in 10 seconds after the start?

Answer»

A car has a uniform acceleration of 4 ms^{-2 .}

What distance will it cover in 10 seconds after the start?

Discussion

18.	How the gravitational force depends on the distance between them ???
Answer» How the gravitational force depends on the distance between them ???

Discussion

19.	In the absence of hydrogen bonding, boiling point of water would have been-
Answer» In the absence of hydrogen bonding, boiling point of water would have been-

Discussion

20.	A body moving from rest with uniform acceleration travels a distance 'X' in the first t seconds and travels a distance 'Y' with same acceleration in the next '2t' seconds, then
Answer» A body moving from rest with uniform acceleration travels a distance 'X' in the first t seconds and travels a distance 'Y' with same acceleration in the next '2t' seconds, then

Discussion

21.	When an object is dropped from a height, it accelerates and falls down. The force which accelerates the object is
Answer» When an object is dropped from a height, it accelerates and falls down. The force which accelerates the object is

Discussion

22.	What are the three laws of motion?
Answer» What are the three laws of motion?

Discussion

23.	If a sphere is moving with a constant momentum, the motion of the body is :
Answer» If a sphere is moving with a constant momentum, the motion of the body is :

Discussion

24.	If the vertices of a triangle be (a, b - c), (b, c - a) and (c, a - b), then the centroid of the triangle lies on ___ axis.
Answer» If the vertices of a triangle be (a, b - c), (b, c - a) and (c, a - b), then the centroid of the triangle lies on ___ axis.

Discussion

25.	When a car driver travelling at a speed of 10 ms applies brakes and brings the car to rest in 20s, then retardation will be : (a) + 2 m/s2 (b) −2m/s2 (c) −0.5m/s2 (d) +0.5m/s2
Answer» When a car driver travelling at a speed of 10 $\frac{m}{s}$ applies brakes and brings the car to rest in 20s, then retardation will be : (a) $+ 2 m / s^{2}$ (b) $- 2 m / s^{2}$ (c) $- 0.5 m / s^{2}$ (d) $+ 0.5 m / s^{2}$

25.

When a car driver travelling at a speed of 10 ms applies brakes and brings the car to rest in 20s, then retardation will be : (a) + 2 m/s2 (b) −2m/s2 (c) −0.5m/s2 (d) +0.5m/s2

Answer»

When a car driver travelling at a speed of 10 $\frac{m}{s}$ applies brakes and brings the car to rest in 20s, then retardation will be :

(a) $+ 2 m / s^{2}$ (b) $- 2 m / s^{2}$ (c) $- 0.5 m / s^{2}$ (d) $+ 0.5 m / s^{2}$

Discussion

26.	Two spheres of the same size are made up of iron and wood respectively and are immersed in water. Then the ratio of upthrust will be?
Answer» Two spheres of the same size are made up of iron and wood respectively and are immersed in water. Then the ratio of upthrust will be?

Discussion

27.	Two bodies of same masses are placed at a height h and 2h. Compare their gravitational potential energy.
Answer» Two bodies of same masses are placed at a height h and 2h. Compare their gravitational potential energy.

27.

Two bodies of same masses are placed at a height h and 2h. Compare their gravitational potential energy.

Answer»

Two bodies of same masses are placed at a height h and 2h.

Compare their gravitational potential energy.

Discussion

28.	A train starting from a railway station moves with uniform accrleration and attains a speed of 40km hr-1 in 10 minutes. Find its acceleration.
Answer» A train starting from a railway station moves with uniform accrleration and attains a speed of 40km hr^-1 in 10 minutes. Find its acceleration.

Discussion

29.	A gold leaf electroscope is given a positive charge so that the leaves diverge. How is the divergence of the leaves affected, when an uncharged rod is brought near its disc?
Answer» A gold leaf electroscope is given a positive charge so that the leaves diverge. How is the divergence of the leaves affected, when an uncharged rod is brought near its disc?

Discussion

30.	SI unit of force is kg m s-2. This unit is also known as:
Answer» SI unit of force is kg m s^-2. This unit is also known as:

Discussion

31.	The value of g on the moon is g = GM/R2 where
Answer» The value of g on the moon is g = GM/R² where

Discussion

32.	Consider the situatuion shown in figure. A plane mirror is fixed at a height h above the bottom of a beaker containing water (refractive index μ ) up to a height d. Find the position of the image of the bottom formed by the mirror.
Answer» Consider the situatuion shown in figure. A plane mirror is fixed at a height h above the bottom of a beaker containing water (refractive index $μ$ ) up to a height d. Find the position of the image of the bottom formed by the mirror.

Discussion

33.	200 J of work was done against gravity to lift an object of mass 1 kg to a particular height. If the body is dropped from that height, what will be its velocity when it reaches the bottom?
Answer» 200 J of work was done against gravity to lift an object of mass 1 kg to a particular height. If the body is dropped from that height, what will be its velocity when it reaches the bottom?

Discussion

34.	Explain why a ringing bell suspended in a vacuum chamber cannot be heard outside.
Answer» Explain why a ringing bell suspended in a vacuum chamber cannot be heard outside.

Discussion

35.	A stone is dropped from a height of 20 m. (i) How long will it take to reach the ground ? (ii) What will be its speed when it hits the ground ? (g=10m/s2)
Answer» A stone is dropped from a height of 20 m. (i) How long will it take to reach the ground ? (ii) What will be its speed when it hits the ground ? $(g = 10 m / s^{2})$

Discussion

36.	Write the coordinates of a point to the left of y-axis and on x-axis at a distance of 6 units.
Answer» Write the coordinates of a point to the left of y-axis and on x-axis at a distance of 6 units.

Discussion

37.	A buoy is held inside water contained in a vessel by tying it with a thread to the base of the vessel. Name the three forces that keep the buoy in equilibrium and state the direction in which each force acts.
Answer» A buoy is held inside water contained in a vessel by tying it with a thread to the base of the vessel. Name the three forces that keep the buoy in equilibrium and state the direction in which each force acts.

Discussion

38.	The compound or the block, and the tackle system uses:-
Answer» The compound or the block, and the tackle system uses:-

Discussion

39.	What is the name of the device which is used to find the depth of sea (or ocean) by using ultrasonic sound waves ?
Answer» What is the name of the device which is used to find the depth of sea (or ocean) by using ultrasonic sound waves ?

Discussion

40.	'The density of iron is 7800 kg m−3'. What do you understand by this statement ?
Answer» 'The density of iron is 7800 kg $m^{- 3}$ '. What do you understand by this statement ?

Discussion

41.	Can velocity be negative.
Answer» Can velocity be negative.

Discussion

42.	An auto travels the first half time with a uniform speed, u and the next half time with a uniform speed, v Find its average speed for the complete journey.
Answer» An auto travels the first half time with a uniform speed, $u$ and the next half time with a uniform speed, v Find its average speed for the complete journey.

Discussion

43.	Name the two scales of a vernier callipers and explain, how is it used to measure a length correct up to 0.01 cm.
Answer» Name the two scales of a vernier callipers and explain, how is it used to measure a length correct up to 0.01 cm.

Discussion

44.	If a man of mass M jumps to the ground from a height h and his centre of mass moves a distance of x during the impact, the average force acting on him (assuming his retardation to be constant during his impact with the ground) is
Answer» If a man of mass M jumps to the ground from a height h and his centre of mass moves a distance of x during the impact, the average force acting on him (assuming his retardation to be constant during his impact with the ground) is

Discussion

45.	Two particles are released from the same height at an interval of 1sec.How long after the first particle begin to fall ,will the two particles be 10m apart ?
Answer» Two particles are released from the same height at an interval of 1sec.How long after the first particle begin to fall ,will the two particles be 10m apart ?

Discussion

46.	For the screw gauge shown below, the least count is 0.01 mm. What is the zero correction?
Answer» For the screw gauge shown below, the least count is 0.01 mm. What is the zero correction?

46.

For the screw gauge shown below, the least count is 0.01 mm. What is the zero correction?

Answer»

For the screw gauge shown below, the least count is 0.01 mm. What is the zero correction?

Discussion

47.	The loss of mass in a nuclear reaction is 0.45%. How much energy is released in the fusion of 2 Kg mass?
Answer» The loss of mass in a nuclear reaction is 0.45%. How much energy is released in the fusion of 2 Kg mass?

Discussion

48.	Which part of a screw gauge is used to mark the main scale and base line?
Answer» Which part of a screw gauge is used to mark the main scale and base line?

Discussion

49.	A piece of wood has dimensions 1 m×2 m×3 m and a mass of 2 kg. What is the density of wood and will the piece float in water? [ρwater = 1000 kg m−3]
Answer» A piece of wood has dimensions $1 m \times 2 m \times 3 m$ and a mass of $2 k g$ . What is the density of wood and will the piece float in water? $[ρ_{w a t e r}$ = 1000 $k g m^{- 3}]$

49.

A piece of wood has dimensions 1 m×2 m×3 m and a mass of 2 kg. What is the density of wood and will the piece float in water? [ρwater = 1000 kg m−3]

Answer»

A piece of wood has dimensions $1 m \times 2 m \times 3 m$ and a mass of $2 k g$ . What is the density of wood and will the piece float in water?

$[ρ_{w a t e r}$ = 1000 $k g m^{- 3}]$

Discussion

50.	Atmospheric pressure is 1.013×105Nm-2. The pressure 100m below the surface of ocean (Specific gravity of sea water=1.03) in Nm-2 is:-
Answer» Atmospheric pressure is 1.013×10⁵Nm^-2. The pressure 100m below the surface of ocean (Specific gravity of sea water=1.03) in Nm^-2 is:-

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A box follows a zigzag path to reach from point A to B. The actual length of the path is 5 m and the length of the straight line joining the two points is 2 m. If a force of 5 N acts on the box along its path then the work done on the box by the force is:

At what distance from a concave mirror of focal length 25 cm shouldan object be placed so that the size of the image is equal to the size of the object

A constant force acts on a body of mass 5kgfor a duration of 2s. It increases the object's velocity from 3m/s to 7m/s . Find the magnitude of the force that was applied for a duration of 5s, what would be the final velocity of the object?

So it takes ugsecs to go up, how long will it take to come down?(as mentioned there is no air)

Name the principle on which a soundboard works.

Which of the following frequency of sound can be generated by a vibrating simple pendulum as well as by the vibrating vocal cords of a rhinoceros ? (a) 5 kHz (b) 25 Hz (c) 10 Hz (d) 15,000 Hz

Which of the following quantities is a scalar quantity?

Name the two kinds of waves in form of which sound travels in a medium.

How does the pressure exerted by a solid and a fluid differ?

How to find the speed at which galaxy move ?

Water expands when it is cooled from ___∘C to ___∘C, this is known as the anomalous expansion of water.

Why can an x-ray telescope not based on the earth

Why does an object increase its energy when raised through a height?

A mass of 10 kg is given. Find its weight: 1.on the surface of the earth 2.on the surface of the moon 3.at the centre of the earth

Explain the following: ​​​​​​(I) Inertia of rest (ii) Inertia of motion (iii) Inertia of direction

A ball of mass 2kg is dropped from a height get height . What is the work done after 2sec after the ball is dropped?

A car has a uniform acceleration of 4 ms-2 . What distance will it cover in 10 seconds after the start?

How the gravitational force depends on the distance between them ???

In the absence of hydrogen bonding, boiling point of water would have been-

A body moving from rest with uniform acceleration travels a distance 'X' in the first t seconds and travels a distance 'Y' with same acceleration in the next '2t' seconds, then

When an object is dropped from a height, it accelerates and falls down. The force which accelerates the object is

What are the three laws of motion?

If a sphere is moving with a constant momentum, the motion of the body is :

If the vertices of a triangle be (a, b - c), (b, c - a) and (c, a - b), then the centroid of the triangle lies on ___ axis.

When a car driver travelling at a speed of 10 ms applies brakes and brings the car to rest in 20s, then retardation will be : (a) + 2 m/s2 (b) −2m/s2 (c) −0.5m/s2 (d) +0.5m/s2

Two spheres of the same size are made up of iron and wood respectively and are immersed in water. Then the ratio of upthrust will be?

Two bodies of same masses are placed at a height h and 2h. Compare their gravitational potential energy.

A train starting from a railway station moves with uniform accrleration and attains a speed of 40km hr-1 in 10 minutes. Find its acceleration.

A gold leaf electroscope is given a positive charge so that the leaves diverge. How is the divergence of the leaves affected, when an uncharged rod is brought near its disc?

SI unit of force is kg m s-2. This unit is also known as:

The value of g on the moon is g = GM/R2 where

Consider the situatuion shown in figure. A plane mirror is fixed at a height h above the bottom of a beaker containing water (refractive index μ ) up to a height d. Find the position of the image of the bottom formed by the mirror.

200 J of work was done against gravity to lift an object of mass 1 kg to a particular height. If the body is dropped from that height, what will be its velocity when it reaches the bottom?

Explain why a ringing bell suspended in a vacuum chamber cannot be heard outside.

A stone is dropped from a height of 20 m. (i) How long will it take to reach the ground ? (ii) What will be its speed when it hits the ground ? (g=10m/s2)

Write the coordinates of a point to the left of y-axis and on x-axis at a distance of 6 units.

A buoy is held inside water contained in a vessel by tying it with a thread to the base of the vessel. Name the three forces that keep the buoy in equilibrium and state the direction in which each force acts.

The compound or the block, and the tackle system uses:-

What is the name of the device which is used to find the depth of sea (or ocean) by using ultrasonic sound waves ?

'The density of iron is 7800 kg m−3'. What do you understand by this statement ?

Can velocity be negative.

An auto travels the first half time with a uniform speed, u and the next half time with a uniform speed, v Find its average speed for the complete journey.

Name the two scales of a vernier callipers and explain, how is it used to measure a length correct up to 0.01 cm.

If a man of mass M jumps to the ground from a height h and his centre of mass moves a distance of x during the impact, the average force acting on him (assuming his retardation to be constant during his impact with the ground) is

Two particles are released from the same height at an interval of 1sec.How long after the first particle begin to fall ,will the two particles be 10m apart ?

For the screw gauge shown below, the least count is 0.01 mm. What is the zero correction?

The loss of mass in a nuclear reaction is 0.45%. How much energy is released in the fusion of 2 Kg mass?

Which part of a screw gauge is used to mark the main scale and base line?

A piece of wood has dimensions 1 m×2 m×3 m and a mass of 2 kg. What is the density of wood and will the piece float in water? [ρwater = 1000 kg m−3]

Atmospheric pressure is 1.013×105Nm-2. The pressure 100m below the surface of ocean (Specific gravity of sea water=1.03) in Nm​​​​​-2 is:-

Water expands when it is cooled from _∘C to _∘C, this is known as the anomalous expansion of water.

Explain the following: (I) Inertia of rest (ii) Inertia of motion (iii) Inertia of direction

Atmospheric pressure is 1.013×105Nm-2. The pressure 100m below the surface of ocean (Specific gravity of sea water=1.03) in Nm-2 is:-