13232 + Interview Questions in Physics

1.	The direction of heat transfer depends on which of the following?
Answer» The direction of heat transfer depends on which of the following?

Discussion

2.	The reflected wave, incident wave and the normal to the reflecting surface always lie:
Answer» The reflected wave, incident wave and the normal to the reflecting surface always lie:

Discussion

3.	Pressure at a point in the liquid is:
Answer» Pressure at a point in the liquid is:

Discussion

4.	Which of the following is/are the unit(s) of density?
Answer» Which of the following is/are the unit(s) of density?

Discussion

5.	Why is acceleration only related to velocity and not speed?
Answer» Why is acceleration only related to velocity and not speed?

Discussion

6.	How much thrust (in N) will be required to exert a pressure of 20,000 Pa on an area of 15 cm2?30
Answer» How much thrust (in $N$ ) will be required to exert a pressure of $20, 000 Pa$ on an area of $15 {cm}^{2}$ ? 30

Discussion

7.	It was a rainy day in Bangalore. Rohit was sitting beside the window when he saw lightning strike. He started his stop watch. After 22 seconds, he heard thunder. Calculate the height of the clouds which caused the lightning. Given, Speed of light = 3 x 108 ms and Speed of sound = 340ms.
Answer» It was a rainy day in Bangalore. Rohit was sitting beside the window when he saw lightning strike. He started his stop watch. After 22 seconds, he heard thunder. Calculate the height of the clouds which caused the lightning. Given, Speed of light = 3 x $10^{8}$ $\frac{m}{s}$ and Speed of sound = $340 \frac{m}{s}$ .

Discussion

8.	Which of the following is correct regarding the nature of parallel and anti-parallel currents?
Answer» Which of the following is correct regarding the nature of parallel and anti-parallel currents?

Discussion

9.	Why does a current carrying conductor kept in a magnetic field experience force? On what factors does the direction of this force depend? Name and state the rule used for determination of direction of this force. [5 MARKS]
Answer» Why does a current carrying conductor kept in a magnetic field experience force? On what factors does the direction of this force depend? Name and state the rule used for determination of direction of this force. [5 MARKS]

Discussion

10.	A motorcyclist drives from place A to B with a uniform speed of 30 km h−1 and returns from place B to A with a uniform speed of 20 km h−1. Find his average speed.
Answer» A motorcyclist drives from place A to B with a uniform speed of 30 km $h^{- 1}$ and returns from place B to A with a uniform speed of 20 km $h^{- 1}$ . Find his average speed.

Discussion

11.	If a piece of metal is heated to temperature θ and then allowed to cool in a room which is at temperature θ0. The graph between the temperature T of the metal and time t will be closed to
Answer» If a piece of metal is heated to temperature $θ$ and then allowed to cool in a room which is at temperature $θ_{0}$ . The graph between the temperature T of the metal and time t will be closed to

Discussion

12.	A body of mass 5 kg is taken from a height 5 m to 15 m. Find the increase in its potential energy. Take g=10 ms−2
Answer» A body of mass 5 kg is taken from a height 5 m to 15 m. Find the increase in its potential energy. Take $g = 10 m s^{- 2}$

Discussion

13.	The following time-displacement graph (fig.) represents
Answer» The following time-displacement graph (fig.) represents

13.

The following time-displacement graph (fig.) represents

Answer»

The following time-displacement graph (fig.) represents

Discussion

14.	A cue ball of mass 0.16 kg, rolling at 4.0 m/s, hits a stationary ball (numbered 8) of the same mass. If the cue ball travels 45∘ with respect to its original path, and the eight number ball also at 45∘ with respect to the horizontal then what is the velocity of each ball after the collision if they travel with the same velocity.
Answer» A cue ball of mass 0.16 kg, rolling at 4.0 m/s, hits a stationary ball (numbered 8) of the same mass. If the cue ball travels $45^{\circ}$ with respect to its original path, and the eight number ball also at $45^{\circ}$ with respect to the horizontal then what is the velocity of each ball after the collision if they travel with the same velocity.

14.

A cue ball of mass 0.16 kg, rolling at 4.0 m/s, hits a stationary ball (numbered 8) of the same mass. If the cue ball travels 45∘ with respect to its original path, and the eight number ball also at 45∘ with respect to the horizontal then what is the velocity of each ball after the collision if they travel with the same velocity.

Answer»

A cue ball of mass 0.16 kg, rolling at 4.0 m/s, hits a stationary ball (numbered 8) of the same mass. If the cue ball travels $45^{\circ}$ with respect to its original path, and the eight number ball also at $45^{\circ}$ with respect to the horizontal then what is the velocity of each ball after the collision if they travel with the same velocity.

Discussion

15.	In which of the given scenario is the laws of reflection not followed.
Answer» In which of the given scenario is the laws of reflection not followed.

Discussion

16.	A boy while playing wanted to throw a ball of mass 200g atop such that it could reach his friend, who is standing at a height of 5m from ground. Frustrated with repetitive failures, he managed to find a spring and compressed it to develop certain potential energy so that ball could reach his friend. Estimate the work done by the boy such that the ball just reaches his friend (take 'g' = 10 m/s2).
Answer» A boy while playing wanted to throw a ball of mass 200g atop such that it could reach his friend, who is standing at a height of 5m from ground. Frustrated with repetitive failures, he managed to find a spring and compressed it to develop certain potential energy so that ball could reach his friend. Estimate the work done by the boy such that the ball just reaches his friend (take 'g' = 10 m/s²).

Discussion

17.	A bullet of mass 20 gram is horizontally fired with a velocity 150 metre per second from a pistol of 2 kilogram what is the recoil velocity of the stock
Answer» A bullet of mass 20 gram is horizontally fired with a velocity 150 metre per second from a pistol of 2 kilogram what is the recoil velocity of the stock

Discussion

18.	If the distance between two masses is increased by a factor of 5, by what factor would the mass of one of them have to be altered to maintain the same gravitational force? Would this be an increase or decrease in the mass?
Answer» If the distance between two masses is increased by a factor of 5, by what factor would the mass of one of them have to be altered to maintain the same gravitational force? Would this be an increase or decrease in the mass?

Discussion

19.	Sneha has to lift a load of mass 50 kg to a height 1m. She can exert a maximum effort of 250 N, so she uses an inclined plane to lift the load up. What should be the minimum length of the plank used by her?
Answer» Sneha has to lift a load of mass 50 kg to a height 1m. She can exert a maximum effort of 250 N, so she uses an inclined plane to lift the load up. What should be the minimum length of the plank used by her?

Discussion

20.	When is the image formed by convex lens virtual and erect?
Answer» When is the image formed by convex lens virtual and erect?

Discussion

21.	A 200 m long train crosses a 400m Bridge with a velocity of 36 km per hour. find the time taken by the train to cross the bridge
Answer» A 200 m long train crosses a 400m Bridge with a velocity of 36 km per hour. find the time taken by the train to cross the bridge

Discussion

22.	A man spends 6.4kJ energy in displacing a body by 64m in the direction in which he applies force in 2.5s.Calculate : 1-the force applied 2-the power spent(in H.P. ) by the man
Answer» A man spends 6.4kJ energy in displacing a body by 64m in the direction in which he applies force in 2.5s.Calculate : 1-the force applied 2-the power spent(in H.P. ) by the man

22.

A man spends 6.4kJ energy in displacing a body by 64m in the direction in which he applies force in 2.5s.Calculate : 1-the force applied 2-the power spent(in H.P. ) by the man

Answer»

A man spends 6.4kJ energy in displacing a body by 64m in the direction in which he applies force in 2.5s.Calculate :

1-the force applied

2-the power spent(in H.P.

) by the man

Discussion

23.	A light and a heavy object have the same momentum. Find out the ratio of their kinetic energies ?
Answer» A light and a heavy object have the same momentum. Find out the ratio of their kinetic energies ?

Discussion

24.	Definition of motion
Answer» Definition of motion

Discussion

25.	The S.I. unit of wavelength is ___.
Answer» The S.I. unit of wavelength is ___.

Discussion

26.	Why are shockers present in cars ? ( 3 m )
Answer» Why are shockers present in cars ? ( 3 m )

Discussion

27.	The rate of doing work or rate at which energy is transferred is known as:
Answer» The rate of doing work or rate at which energy is transferred is known as:

Discussion

28.	Why objects moving on a curved path with the same speed are not considered to be in uniform motion?
Answer» Why objects moving on a curved path with the same speed are not considered to be in uniform motion?

Discussion

29.	A cylindrical tube of uniform cross-sectional area A is fitted with two air tight frictionless pistons. The pistons are connected to each other by a metallic wire. Initially the pressure of the gas is P0 and temperature is T0,atmospheric pressure is also P0. Now the temperature of the gas is increased to 2T0, the tension in the wire will be
Answer» A cylindrical tube of uniform cross-sectional area A is fitted with two air tight frictionless pistons. The pistons are connected to each other by a metallic wire. Initially the pressure of the gas is $P_{0}$ and temperature is $T_{0}$ ,atmospheric pressure is also $P_{0}$ . Now the temperature of the gas is increased to 2 $T_{0}$ , the tension in the wire will be

29.

A cylindrical tube of uniform cross-sectional area A is fitted with two air tight frictionless pistons. The pistons are connected to each other by a metallic wire. Initially the pressure of the gas is P0 and temperature is T0,atmospheric pressure is also P0. Now the temperature of the gas is increased to 2T0, the tension in the wire will be

Answer»

A cylindrical tube of uniform cross-sectional area A is fitted with two air tight frictionless pistons. The pistons are connected to each other by a metallic wire. Initially the pressure of the gas is $P_{0}$ and temperature is $T_{0}$ ,atmospheric pressure is also $P_{0}$ . Now the temperature of the gas is increased to 2 $T_{0}$ , the tension in the wire will be

Discussion

30.	Which of the following is applicable for the Moon's motion around Earth?
Answer» Which of the following is applicable for the Moon's motion around Earth?

Discussion

31.	One mole of glucose on metabolism liberates how many kilocalories of energy?
Answer» One mole of glucose on metabolism liberates how many kilocalories of energy?

Discussion

32.	A marine survey ship sends a sound wave straight to the sea bed. It detects an echo 4.0 s later. What is the approximate depth of the sea?
Answer» A marine survey ship sends a sound wave straight to the sea bed. It detects an echo 4.0 s later. What is the approximate depth of the sea?

Discussion

33.	A body was moving with a constant velocity of 20 m/s. When an external force is applied, it produces an uniform acceleration of 4 m/s2. What is the time taken to reach 80 m/s and also find the velocity at half of that time? [3 MARKS]
Answer» A body was moving with a constant velocity of 20 m/s. When an external force is applied, it produces an uniform acceleration of $4 m / s^{2}$ . What is the time taken to reach 80 m/s and also find the velocity at half of that time? [3 MARKS]

Discussion

34.	A body weighs 700 gm wt on the surface of the earth. How much will it weigh on the surface of a planet whose mass is 17 and radius is half that of the earth
Answer» A body weighs 700 gm wt on the surface of the earth. How much will it weigh on the surface of a planet whose mass is $\frac{1}{7}$ and radius is half that of the earth

Discussion

35.	Three uniform rods forming a triangle would have the center of mass at
Answer» Three uniform rods forming a triangle would have the center of mass at

Discussion

36.	A motorist travelled 210 km in 6 hours. His average speed for first 150 kilometres was 50 kmh−1. What was his average speed for the remaining 60 kilometres?
Answer» A motorist travelled $210 k m$ in $6 h o u r s$ . His average speed for first $150 k i l o m e t r e s$ was $50 k m h^{- 1}$ . What was his average speed for the remaining $60 k i l o m e t r e s$ ?

Discussion

37.	A 3 kg stone is weighed first at equator, then it is taken to the north pole. The weight measured by the spring balance will be
Answer» A 3 kg stone is weighed first at equator, then it is taken to the north pole. The weight measured by the spring balance will be

Discussion

38.	A man standing in front of a vertical cliff fires a gun and hears the echo after 4 seconds. He moves 150 m towards the cliff and again fires the gun. This time he hears the echo after 3.6 seconds. Find the distance of the cliff from his first position.( Assume velocity of sound is not known.)
Answer» A man standing in front of a vertical cliff fires a gun and hears the echo after 4 seconds. He moves 150 m towards the cliff and again fires the gun. This time he hears the echo after 3.6 seconds. Find the distance of the cliff from his first position.( Assume velocity of sound is not known.)

Discussion

39.	Which of the following actions are in free fall? 1. An object dropped from a certain height. 2. An object is thrown upward or a person jumping off. 3. Flying in an aircraft. 4. A car accelerating at 9.8 m/s2 on the road.
Answer» Which of the following actions are in free fall? 1. An object dropped from a certain height. 2. An object is thrown upward or a person jumping off. 3. Flying in an aircraft. 4. A car accelerating at 9.8 m/s² on the road.

39.

Which of the following actions are in free fall? 1. An object dropped from a certain height. 2. An object is thrown upward or a person jumping off. 3. Flying in an aircraft. 4. A car accelerating at 9.8 m/s2 on the road.

Answer»

Which of the following actions are in free fall?

1. An object dropped from a certain height.
2. An object is thrown upward or a person jumping off.
3. Flying in an aircraft.
4. A car accelerating at 9.8 m/s² on the road.

Discussion

40.	The moon is revolving around the earth in a circular path. How much work is done by the moon ?
Answer» The moon is revolving around the earth in a circular path. How much work is done by the moon ?

Discussion

41.	Moon is revolving in a circular orbit around the earth with a uniform speed v. If the gravitational force suddenly disappears, then moon will
Answer» Moon is revolving in a circular orbit around the earth with a uniform speed v. If the gravitational force suddenly disappears, then moon will

Discussion

42.	Define one newton of force.
Answer» Define one newton of force.

Discussion

43.	State two uses of a barometer.
Answer» State two uses of a barometer.

Discussion

44.	Explain the principle of a hydraulic machine. Name two devices which work on this principle.
Answer» Explain the principle of a hydraulic machine. Name two devices which work on this principle.

Discussion

45.	Match the formulas for different quantities of satellites. Assume terms have their standard meanings.
Answer» Match the formulas for different quantities of satellites. Assume terms have their standard meanings.

Discussion

46.	Why speed is related to velocity as the displacement is different from distance.
Answer» Why speed is related to velocity as the displacement is different from distance.

Discussion

47.	A rain drop falls near the surface of Earth with almost uniform velocity because
Answer» A rain drop falls near the surface of Earth with almost uniform velocity because

Discussion

48.	On what factors does the kinetic energy of a body depend?
Answer» On what factors does the kinetic energy of a body depend?

Discussion

49.	Difference between center of mass and center of gravity.
Answer» Difference between center of mass and center of gravity.

Discussion

50.	What happens to the barometric height if a faulty barometer is pushed down into the mercury trough?
Answer» What happens to the barometric height if a faulty barometer is pushed down into the mercury trough?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The direction of heat transfer depends on which of the following?

The reflected wave, incident wave and the normal to the reflecting surface always lie:

Pressure at a point in the liquid is:

Which of the following is/are the unit(s) of density?

Why is acceleration only related to velocity and not speed?

How much thrust (in N) will be required to exert a pressure of 20,000 Pa on an area of 15 cm2?30

It was a rainy day in Bangalore. Rohit was sitting beside the window when he saw lightning strike. He started his stop watch. After 22 seconds, he heard thunder. Calculate the height of the clouds which caused the lightning. Given, Speed of light = 3 x 108 ms and Speed of sound = 340ms.

Which of the following is correct regarding the nature of parallel and anti-parallel currents?

Why does a current carrying conductor kept in a magnetic field experience force? On what factors does the direction of this force depend? Name and state the rule used for determination of direction of this force. [5 MARKS]

A motorcyclist drives from place A to B with a uniform speed of 30 km h−1 and returns from place B to A with a uniform speed of 20 km h−1. Find his average speed.

If a piece of metal is heated to temperature θ and then allowed to cool in a room which is at temperature θ0. The graph between the temperature T of the metal and time t will be closed to

A body of mass 5 kg is taken from a height 5 m to 15 m. Find the increase in its potential energy. Take g=10 ms−2

The following time-displacement graph (fig.) represents

In which of the given scenario is the laws of reflection not followed.

A bullet of mass 20 gram is horizontally fired with a velocity 150 metre per second from a pistol of 2 kilogram what is the recoil velocity of the stock

If the distance between two masses is increased by a factor of 5, by what factor would the mass of one of them have to be altered to maintain the same gravitational force? Would this be an increase or decrease in the mass?

Sneha has to lift a load of mass 50 kg to a height 1m. She can exert a maximum effort of 250 N, so she uses an inclined plane to lift the load up. What should be the minimum length of the plank used by her?

When is the image formed by convex lens virtual and erect?

A 200 m long train crosses a 400m Bridge with a velocity of 36 km per hour. find the time taken by the train to cross the bridge

A man spends 6.4kJ energy in displacing a body by 64m in the direction in which he applies force in 2.5s.Calculate : 1-the force applied 2-the power spent(in H.P. ) by the man

A light and a heavy object have the same momentum. Find out the ratio of their kinetic energies ?

Definition of motion

The S.I. unit of wavelength is ___.

Why are shockers present in cars ? ( 3 m )

The rate of doing work or rate at which energy is transferred is known as:

Why objects moving on a curved path with the same speed are not considered to be in uniform motion?

Which of the following is applicable for the Moon's motion around Earth?

One mole of glucose on metabolism liberates how many kilocalories of energy?

A marine survey ship sends a sound wave straight to the sea bed. It detects an echo 4.0 s later. What is the approximate depth of the sea?

A body was moving with a constant velocity of 20 m/s. When an external force is applied, it produces an uniform acceleration of 4 m/s2. What is the time taken to reach 80 m/s and also find the velocity at half of that time? [3 MARKS]

A body weighs 700 gm wt on the surface of the earth. How much will it weigh on the surface of a planet whose mass is 17 and radius is half that of the earth

Three uniform rods forming a triangle would have the center of mass at

A motorist travelled 210 km in 6 hours. His average speed for first 150 kilometres was 50 kmh−1. What was his average speed for the remaining 60 kilometres?

A 3 kg stone is weighed first at equator, then it is taken to the north pole. The weight measured by the spring balance will be

A man standing in front of a vertical cliff fires a gun and hears the echo after 4 seconds. He moves 150 m towards the cliff and again fires the gun. This time he hears the echo after 3.6 seconds. Find the distance of the cliff from his first position.( Assume velocity of sound is not known.)

Which of the following actions are in free fall? 1. An object dropped from a certain height. 2. An object is thrown upward or a person jumping off. 3. Flying in an aircraft. 4. A car accelerating at 9.8 m/s2 on the road.

The moon is revolving around the earth in a circular path. How much work is done by the moon ?

Moon is revolving in a circular orbit around the earth with a uniform speed v. If the gravitational force suddenly disappears, then moon will

Define one newton of force.

State two uses of a barometer.

Explain the principle of a hydraulic machine. Name two devices which work on this principle.

Match the formulas for different quantities of satellites. Assume terms have their standard meanings.

Why speed is related to velocity as the displacement is different from distance.

A rain drop falls near the surface of Earth with almost uniform velocity because

On what factors does the kinetic energy of a body depend?

Difference between center of mass and center of gravity.

What happens to the barometric height if a faulty barometer is pushed down into the mercury trough?