13232 + Interview Questions in Physics

1.	A base ball is thrown straight upward what is the acceleration of the ball at its highest point? A) 0 B) 1/2 g downward C) g downward D) 1/2 g upward Explain
Answer» A base ball is thrown straight upward what is the acceleration of the ball at its highest point? A) 0 B) 1/2 g downward C) g downward D) 1/2 g upward Explain

1.

A base ball is thrown straight upward what is the acceleration of the ball at its highest point? A) 0 B) 1/2 g downward C) g downward D) 1/2 g upward Explain

Answer»

A base ball is thrown straight upward what is the acceleration of the ball at its highest point?

A) 0

B) 1/2 g downward

C) g downward

D) 1/2 g upward

Explain

Discussion

2.	Energy enters in a food chain through:
Answer» Energy enters in a food chain through:

Discussion

3.	Three rods A, B and C, having identical shape and size, are hinged together at ends to form an equilateral triangle. Rods A and B are made of same material having coefficient of linear thermal expansion a while that of material of rod C is α2. By how many kelvin must the system of rods be heated to increase the angle opposite to rod C by Δθ.
Answer» Three rods A, B and C, having identical shape and size, are hinged together at ends to form an equilateral triangle. Rods A and B are made of same material having coefficient of linear thermal expansion a while that of material of rod C is $α_{2}$ . By how many kelvin must the system of rods be heated to increase the angle opposite to rod C by $Δ θ$ .

Discussion

4.	An objects has constant momentum of 2.45x102 kg m/s. Determine the momentum of the object if it’s mass decreases to 1/3 of its original value and applied forces causes the speed to increase to exactly four times of the original... The direction of the velocity remains the same...
Answer» An objects has constant momentum of 2.45x10²kg m/s. Determine the momentum of the object if it’s mass decreases to 1/3 of its original value and applied forces causes the speed to increase to exactly four times of the original... The direction of the velocity remains the same...

Discussion

5.	According to Newton's first law the body tent to remain at rest . Why body remain to be at rest?
Answer» According to Newton's first law the body tent to remain at rest . Why body remain to be at rest?

Discussion

6.	Why work done is a scalar quantity
Answer» Why work done is a scalar quantity

Discussion

7.	A car starting from rest acquires a velocity 180 m s−1 in 0.05 h.Find it's acceleration.
Answer» A car starting from rest acquires a velocity $180 m s^{- 1}$ in 0.05 h.Find it's acceleration.

Discussion

8.	Does the mass increase or decrease when a body moves in speed close to the speed of light?
Answer» Does the mass increase or decrease when a body moves in speed close to the speed of light?

Discussion

9.	Combustion- a chemical reaction in which substance reacts with oxygen and produces heat and light is called ELECTRIC lamp gives light and heat both can we say combustion taking place electric lamp ?
Answer» Combustion- a chemical reaction in which substance reacts with oxygen and produces heat and light is called ELECTRIC lamp gives light and heat both can we say combustion taking place electric lamp ?

9.

Combustion- a chemical reaction in which substance reacts with oxygen and produces heat and light is called ELECTRIC lamp gives light and heat both can we say combustion taking place electric lamp ?

Answer»

Combustion- a chemical reaction in which substance reacts with oxygen and produces heat and light is called

ELECTRIC lamp gives light and heat both can we say combustion taking place electric lamp ?

Discussion

10.	What should an object do to produce sound?
Answer» What should an object do to produce sound?

Discussion

11.	what is inertia of direction ? How the soil moves out from the grooves of the cycle?
Answer» what is inertia of direction ? How the soil moves out from the grooves of the cycle?

Discussion

12.	In a distance-time graph, if the line is horizontal, then the object is:
Answer» In a distance-time graph, if the line is horizontal, then the object is:

Discussion

13.	Use the following information to answer the next question. John was driving his car. In the rear-view mirror, he saw that a vehicle was just behind his car. He was able to read the word on the vehicle. Which of the following figures is inscribed on the vehicle?
Answer» Use the following information to answer the next question. John was driving his car. In the rear-view mirror, he saw that a vehicle was just behind his car. He was able to read the word on the vehicle. Which of the following figures is inscribed on the vehicle?

13.

Use the following information to answer the next question. John was driving his car. In the rear-view mirror, he saw that a vehicle was just behind his car. He was able to read the word on the vehicle. Which of the following figures is inscribed on the vehicle?

Answer»

Use the following information to answer the next question.

John was driving his car. In the rear-view mirror, he saw that a vehicle was just behind his car. He was able to read the word on the vehicle.

Which of the following figures is inscribed on the vehicle?

Discussion

14.	If a bar magnet was cut initially into two pieces. Then each of the new pieces was cut into two more pieces, and the process was repeated one more time. The number of north poles generated is ___
Answer» If a bar magnet was cut initially into two pieces. Then each of the new pieces was cut into two more pieces, and the process was repeated one more time. The number of north poles generated is ___

Discussion

15.	One end of a metal wire is fixed to a ceiling and a load of 2 kg hangs from the other end. A force of 10N acting downwards, is applied at the bottom of the block. Find the longitudinal strain in the wire. Area of cross section of the wire is 0.005cm2 and Young modulus of the metal is 2.0 × 1011 N m−2. Take g=10ms−2.
Answer» One end of a metal wire is fixed to a ceiling and a load of 2 kg hangs from the other end. A force of 10N acting downwards, is applied at the bottom of the block. Find the longitudinal strain in the wire. Area of cross section of the wire is $0.005 c m^{2}$ and Young modulus of the metal is $2.0 \times 10^{11} N m^{- 2} .$ Take $g = 10 m s^{- 2} .$

Discussion

16.	Rocket engines lift a rocket from the earth surface because hot gas with high velocity
Answer» Rocket engines lift a rocket from the earth surface because hot gas with high velocity

Discussion

17.	If a negatively charged body comes in contact with a neutral body and 10 electrons flow towards the neutral body then find the charge acquired by the neutral body.
Answer» If a negatively charged body comes in contact with a neutral body and 10 electrons flow towards the neutral body then find the charge acquired by the neutral body.

Discussion

18.	In which direction does the buoyant force due to a liquid act?
Answer» In which direction does the buoyant force due to a liquid act?

Discussion

19.	when we land suddenly in flight we feel a push . Is it bcz of inertia? if it is then how ? bcz there is no change in direction or speed much
Answer» when we land suddenly in flight we feel a push . Is it bcz of inertia? if it is then how ? bcz there is no change in direction or speed much

Discussion

20.	The relative density of silver is 10.8. The density of silver is .
Answer» The relative density of silver is 10.8. The density of silver is .

Discussion

21.	How are wave length and frequency of a sound wave related to its speed?
Answer» How are wave length and frequency of a sound wave related to its speed?

Discussion

22.	Define energy. Mention two types of energy. How much work should be done on a bicycle of mass 20 kg to increase its speed from 2 ms−1 to 5 ms−1? (Ignore air resistance and friction). [5 MARKS]
Answer» Define energy. Mention two types of energy. How much work should be done on a bicycle of mass 20 kg to increase its speed from $2 m s^{- 1}$ to $5 m s^{- 1}$ ? (Ignore air resistance and friction). [5 MARKS]

Discussion

23.	A ball is under the effect of circular motion about a perpendicular axis with respect to the reference direction. The angular position (in radians) is given by the following function θ = t2 – 0.4t + 2 .The angular position when angular velocity is zero is
Answer» A ball is under the effect of circular motion about a perpendicular axis with respect to the reference direction. The angular position (in radians) is given by the following function θ = t² – 0.4t + 2 .The angular position when angular velocity is zero is

Discussion

24.	Which would have greater impact; a ball with mass m thrown with speed 20 m/s or a ball with mass m/2 thrown at speed 40 m/s?
Answer» Which would have greater impact; a ball with mass m thrown with speed 20 m/s or a ball with mass m/2 thrown at speed 40 m/s?

Discussion

25.	There is no atmosphere on the moon. Can you hear each other on the moon's surface?
Answer» There is no atmosphere on the moon. Can you hear each other on the moon's surface?

Discussion

26.	An object has mass of 20 kg on earth. What will be its ( i) mass, and (ii) weight, on the moon ? (g on moon = 1.6m/s2).
Answer» An object has mass of 20 kg on earth. What will be its ( i) mass, and (ii) weight, on the moon ? (g on moon = $1.6 m / s^{2}$ ).

Discussion

27.	Which law states that when a carpet is beaten with a stick, dust will come out?
Answer» Which law states that when a carpet is beaten with a stick, dust will come out?

Discussion

28.	Free body diagram of a situation is shown below. The net force is known, however, the magnitude of few of the forces is not known. The magnitude of the unknown forces C and D will be:
Answer» Free body diagram of a situation is shown below. The net force is known, however, the magnitude of few of the forces is not known. The magnitude of the unknown forces C and D will be:

28.

Free body diagram of a situation is shown below. The net force is known, however, the magnitude of few of the forces is not known. The magnitude of the unknown forces C and D will be:

Answer»

Free body diagram of a situation is shown below. The net force is known, however, the magnitude of few of the forces is not known. The magnitude of the unknown forces C and D will be:

Discussion

29.	A car is moving in uniform velocity of 36 kmhr. What is the kinetic energy of the object kept in car. The mass of the object is 20 kg.
Answer» A car is moving in uniform velocity of 36 $\frac{k m}{h r}$ . What is the kinetic energy of the object kept in car. The mass of the object is 20 kg.

Discussion

30.	Explain the terms (i) pitch, and (ii) least count of a screw gauge. How are they determined ?
Answer» Explain the terms (i) pitch, and (ii) least count of a screw gauge. How are they determined ?

Discussion

31.	Describe an experiment to show that in wave motion, only energy is transferred, but particles of the medium do not leave their position.
Answer» Describe an experiment to show that in wave motion, only energy is transferred, but particles of the medium do not leave their position.

Discussion

32.	What is meant by the statement 'rest and motion are relative terms?' Give example to show it.
Answer» What is meant by the statement 'rest and motion are relative terms?' Give example to show it.

Discussion

33.	A bullet of mass 5 gram is fired from a gun with a speed of 250 metre per second in 10 seconds what force Does It Act on the gun
Answer» A bullet of mass 5 gram is fired from a gun with a speed of 250 metre per second in 10 seconds what force Does It Act on the gun

Discussion

34.	A ball of mass 20 g is initially moving with a velocity of 100 ms. On applying a constant force on the ball for 0.5s, it acquires a velocity of 150 ms. Calculate the following: (i) Initial momentum of the ball (ii) Final momentum of the ball (iii) Rate of change of momentum (iv) Acceleration of the ball (v) Magnitude of the force applied
Answer» A ball of mass 20 g is initially moving with a velocity of 100 $\frac{m}{s}$ . On applying a constant force on the ball for 0.5s, it acquires a velocity of 150 $\frac{m}{s}$ . Calculate the following: (i) Initial momentum of the ball (ii) Final momentum of the ball (iii) Rate of change of momentum (iv) Acceleration of the ball (v) Magnitude of the force applied

Discussion

35.	A boy of mass 50kg runs up a staircase of 45 steps in one second. If height of each step is 15cm, find power generated by him. (g=10 m/s²)
Answer» A boy of mass 50kg runs up a staircase of 45 steps in one second. If height of each step is 15cm, find power generated by him. (g=10 m/s²)

Discussion

36.	Is it possible to find the bouyant force exerted by the liquid on an object if the density of the liquid and the object is given.
Answer» Is it possible to find the bouyant force exerted by the liquid on an object if the density of the liquid and the object is given.

Discussion

37.	The brakes applied to a car produce an acceleration of 6 ms-² in opposite direction to the motion. If the car takes 2 s to stop after the application of rakes, calculate the distance it travels during this time.
Answer» The brakes applied to a car produce an acceleration of 6 ms-² in opposite direction to the motion. If the car takes 2 s to stop after the application of rakes, calculate the distance it travels during this time.

Discussion

38.	The tip of second hand of a clock takes 60sec to move once on the circular dial of the clock.If the radius of the dial of the clock be 10.5cm.Calculate the speed of the tip of the sec hand of the clock (π=22/7).
Answer» The tip of second hand of a clock takes 60sec to move once on the circular dial of the clock.If the radius of the dial of the clock be 10.5cm.Calculate the speed of the tip of the sec hand of the clock (π=22/7).

Discussion

39.	As compared to the person with white skin, the person with black skin will experience
Answer» As compared to the person with white skin, the person with black skin will experience

Discussion

40.	What is responsible for the flow of current through a metallic conductor?
Answer» What is responsible for the flow of current through a metallic conductor?

Discussion

41.	A force F is applied to the body and body displaces in the direction of force applied. If the force applied to the body is doubled, the work done will be
Answer» A force F is applied to the body and body displaces in the direction of force applied. If the force applied to the body is doubled, the work done will be

Discussion

42.	Fig. shows the same block of wood floating in three different liquids A, B and C of densities ρ1,ρ2 and ρ3 respectively. Which of the liquid has the highest density? Give reason for your answer.
Answer» Fig. shows the same block of wood floating in three different liquids A, B and C of densities $ρ_{1}, ρ_{2}$ and $ρ_{3}$ respectively. Which of the liquid has the highest density? Give reason for your answer.

42.

Fig. shows the same block of wood floating in three different liquids A, B and C of densities ρ1,ρ2 and ρ3 respectively. Which of the liquid has the highest density? Give reason for your answer.

Answer»

Fig. shows the same block of wood floating in three different liquids A, B and C of densities $ρ_{1}, ρ_{2}$ and $ρ_{3}$ respectively. Which of the liquid has the highest density? Give reason for your answer.

Discussion

43.	How much energy does a 100 W electric bulb transfer in 1 minute ? (a) 100 J (b) 600 J (c) 3600 J (d) 6000 J
Answer» How much energy does a 100 W electric bulb transfer in 1 minute ? (a) 100 J (b) 600 J (c) 3600 J (d) 6000 J

43.

How much energy does a 100 W electric bulb transfer in 1 minute ? (a) 100 J (b) 600 J (c) 3600 J (d) 6000 J

Answer»

How much energy does a 100 W electric bulb transfer in 1 minute ?

(a) 100 J

(b) 600 J

(c) 3600 J

(d) 6000 J

Discussion

44.	A particle is moving in a circular path of radius r, the displacement and distance after covering half a circle would be:
Answer» A particle is moving in a circular path of radius r, the displacement and distance after covering half a circle would be:

Discussion

45.	A body goes from C to D with a velocity of 20 m/s and comes back from D to C with a velocity of 30 m/s. The average velocity of the body during the whole journey is:
Answer» A body goes from $C$ to $D$ with a velocity of $20 m / s$ and comes back from $D$ to $C$ with a velocity of $30 m / s$ . The average velocity of the body during the whole journey is:

Discussion

46.	A 1,000 kg car moving at a speed of 20 ms–1 is brought to rest at a distance of 50 m, calculate the net force acting on the car.
Answer» A 1,000 kg car moving at a speed of 20 ms^–1 is brought to rest at a distance of 50 m, calculate the net force acting on the car.

Discussion

47.	Suppose you have a glass of juice in the outer space. Would you be able to drink it with a straw ? Why / why not ?
Answer» Suppose you have a glass of juice in the outer space. Would you be able to drink it with a straw ? Why / why not ?

Discussion

48.	A solid weighs 100 gf (gram force) in air and 90 gf (gram force) when completely immersed in water. Calculate the volume of the solid.
Answer» A solid weighs 100 gf (gram force) in air and 90 gf (gram force) when completely immersed in water. Calculate the volume of the solid.

Discussion

49.	The graph shows a variation of the square of the time period (T2) with the length (l) of a pendulum. Which of the following formula can be used to determine its slope?
Answer» The graph shows a variation of the square of the time period $(T^{2})$ with the length (l) of a pendulum. Which of the following formula can be used to determine its slope?

49.

The graph shows a variation of the square of the time period (T2) with the length (l) of a pendulum. Which of the following formula can be used to determine its slope?

Answer»

The graph shows a variation of the square of the time period $(T^{2})$ with the length (l) of a pendulum. Which of the following formula can be used to determine its slope?

Discussion

50.	Derivation of the weight of an object on the moon is equal to 1/6 th the weight on the earth.
Answer» Derivation of the weight of an object on the moon is equal to 1/6 th the weight on the earth.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A base ball is thrown straight upward what is the acceleration of the ball at its highest point? A) 0 B) 1/2 g downward C) g downward D) 1/2 g upward Explain

Energy enters in a food chain through:

An objects has constant momentum of 2.45x102 kg m/s. Determine the momentum of the object if it’s mass decreases to 1/3 of its original value and applied forces causes the speed to increase to exactly four times of the original... The direction of the velocity remains the same...

According to Newton's first law the body tent to remain at rest . Why body remain to be at rest?

Why work done is a scalar quantity

A car starting from rest acquires a velocity 180 m s−1 in 0.05 h.Find it's acceleration.

Does the mass increase or decrease when a body moves in speed close to the speed of light?

Combustion- a chemical reaction in which substance reacts with oxygen and produces heat and light is called ELECTRIC lamp gives light and heat both can we say combustion taking place electric lamp ?

What should an object do to produce sound?

what is inertia of direction ? How the soil moves out from the grooves of the cycle?

In a distance-time graph, if the line is horizontal, then the object is:

Use the following information to answer the next question. John was driving his car. In the rear-view mirror, he saw that a vehicle was just behind his car. He was able to read the word on the vehicle. Which of the following figures is inscribed on the vehicle?

If a bar magnet was cut initially into two pieces. Then each of the new pieces was cut into two more pieces, and the process was repeated one more time. The number of north poles generated is ___

Rocket engines lift a rocket from the earth surface because hot gas with high velocity

If a negatively charged body comes in contact with a neutral body and 10 electrons flow towards the neutral body then find the charge acquired by the neutral body.

In which direction does the buoyant force due to a liquid act?

when we land suddenly in flight we feel a push . Is it bcz of inertia? if it is then how ? bcz there is no change in direction or speed much

The relative density of silver is 10.8. The density of silver is .

How are wave length and frequency of a sound wave related to its speed?

Define energy. Mention two types of energy. How much work should be done on a bicycle of mass 20 kg to increase its speed from 2 ms−1 to 5 ms−1? (Ignore air resistance and friction). [5 MARKS]

A ball is under the effect of circular motion about a perpendicular axis with respect to the reference direction. The angular position (in radians) is given by the following function θ = t2 – 0.4t + 2 .The angular position when angular velocity is zero is

Which would have greater impact; a ball with mass m thrown with speed 20 m/s or a ball with mass m/2 thrown at speed 40 m/s?

There is no atmosphere on the moon. Can you hear each other on the moon's surface?

An object has mass of 20 kg on earth. What will be its ( i) mass, and (ii) weight, on the moon ? (g on moon = 1.6m/s2).

Which law states that when a carpet is beaten with a stick, dust will come out?

Free body diagram of a situation is shown below. The net force is known, however, the magnitude of few of the forces is not known. The magnitude of the unknown forces C and D will be:

A car is moving in uniform velocity of 36 kmhr. What is the kinetic energy of the object kept in car. The mass of the object is 20 kg.

Explain the terms (i) pitch, and (ii) least count of a screw gauge. How are they determined ?

Describe an experiment to show that in wave motion, only energy is transferred, but particles of the medium do not leave their position.

What is meant by the statement 'rest and motion are relative terms?' Give example to show it.

A bullet of mass 5 gram is fired from a gun with a speed of 250 metre per second in 10 seconds what force Does It Act on the gun

A boy of mass 50kg runs up a staircase of 45 steps in one second. If height of each step is 15cm, find power generated by him. (g=10 m/s²)

Is it possible to find the bouyant force exerted by the liquid on an object if the density of the liquid and the object is given.

The brakes applied to a car produce an acceleration of 6 ms-² in opposite direction to the motion. If the car takes 2 s to stop after the application of rakes, calculate the distance it travels during this time.

The tip of second hand of a clock takes 60sec to move once on the circular dial of the clock.If the radius of the dial of the clock be 10.5cm.Calculate the speed of the tip of the sec hand of the clock (π=22/7).

As compared to the person with white skin, the person with black skin will experience

What is responsible for the flow of current through a metallic conductor?

A force F is applied to the body and body displaces in the direction of force applied. If the force applied to the body is doubled, the work done will be

Fig. shows the same block of wood floating in three different liquids A, B and C of densities ρ1,ρ2 and ρ3 respectively. Which of the liquid has the highest density? Give reason for your answer.

How much energy does a 100 W electric bulb transfer in 1 minute ? (a) 100 J (b) 600 J (c) 3600 J (d) 6000 J

A particle is moving in a circular path of radius r, the displacement and distance after covering half a circle would be:

A body goes from C to D with a velocity of 20 m/s and comes back from D to C with a velocity of 30 m/s. The average velocity of the body during the whole journey is:

A 1,000 kg car moving at a speed of 20 ms–1 is brought to rest at a distance of 50 m, calculate the net force acting on the car.

Suppose you have a glass of juice in the outer space. Would you be able to drink it with a straw ? Why / why not ?

A solid weighs 100 gf (gram force) in air and 90 gf (gram force) when completely immersed in water. Calculate the volume of the solid.

The graph shows a variation of the square of the time period (T2) with the length (l) of a pendulum. Which of the following formula can be used to determine its slope?

Derivation of the weight of an object on the moon is equal to 1/6 th the weight on the earth.