13232 + Interview Questions in Physics

1.	The average orbital distance of Mars is 1.52 times the average orbital distance of the Earth. Knowing that the Earth orbits the sun in approximately 365 days, time for mars orbit around the sun would be
Answer» The average orbital distance of Mars is 1.52 times the average orbital distance of the Earth. Knowing that the Earth orbits the sun in approximately 365 days, time for mars orbit around the sun would be

Discussion

2.	While dusting a carpet we beat it with a stick because:
Answer» While dusting a carpet we beat it with a stick because:

Discussion

3.	Two balls of the same size but of different materials, rubber and iron are kept on the smooth floor of a moving train. The brakes are applied suddenly to stop the train. The balls start rolling in the direction
Answer» Two balls of the same size but of different materials, rubber and iron are kept on the smooth floor of a moving train. The brakes are applied suddenly to stop the train. The balls start rolling in the direction

Discussion

4.	The soft iron is used as the core of an electromagnet because
Answer» The soft iron is used as the core of an electromagnet because

Discussion

5.	We have an electric kettle rated at 60V,5A that runs for 5 minutes. The same amount of energy is used to accelerate a mass of 10kg. What is the velocity attained by the mass?
Answer» We have an electric kettle rated at $60 V, 5 A$ that runs for $5$ minutes. The same amount of energy is used to accelerate a mass of $10 k g$ . What is the velocity attained by the mass?

Discussion

6.	Calculate the effective potential difference for the cells in series given below.
Answer» Calculate the effective potential difference for the cells in series given below.

Discussion

7.	Question 1 A bus starting from rest moves with a uniform acceleration of 0.1 ms−2 for 2 minutes. Find (a) the speed acquired, (b) the distance travelled.
Answer» Question 1 A bus starting from rest moves with a uniform acceleration of $0.1 m s^{- 2}$ for 2 minutes. Find (a) the speed acquired, (b) the distance travelled.

Discussion

8.	Is displacement a scalar quantity?
Answer» Is displacement a scalar quantity?

Discussion

9.	A motorcycle is being driven at a speed of 20 m/s when brakes are applied to bring it to rest in five seconds. The deceleration produced in this case will be : (a) +4 m s2 (b)−4 m s2 (c) +0.25 m s2 (d) −0.25 m s2
Answer» A motorcycle is being driven at a speed of 20 m/s when brakes are applied to bring it to rest in five seconds. The deceleration produced in this case will be : (a) $+ 4 m s^{2}$ (b) $- 4 m s^{2}$ (c) $+ 0.25 m s^{2}$ (d) $- 0.25 m s^{2}$

9.

A motorcycle is being driven at a speed of 20 m/s when brakes are applied to bring it to rest in five seconds. The deceleration produced in this case will be : (a) +4 m s2 (b)−4 m s2 (c) +0.25 m s2 (d) −0.25 m s2

Answer»

A motorcycle is being driven at a speed of 20 m/s when brakes are applied to bring it to rest in five seconds. The deceleration produced in this case will be :

(a) $+ 4 m s^{2}$

(b) $- 4 m s^{2}$

(c) $+ 0.25 m s^{2}$

(d) $- 0.25 m s^{2}$

Discussion

10.	The energy conversion in a steam engine is
Answer» The energy conversion in a steam engine is

Discussion

11.	Which of the following relations hold good where F is the focal length and R is the radius of curvature.
Answer» Which of the following relations hold good where F is the focal length and R is the radius of curvature.

Discussion

12.	Action and reaction are pair of forces which acts on __ body(s).
Answer» Action and reaction are pair of forces which acts on __ body(s).

Discussion

13.	A toy train of mass 1 kg, starting from rest attains a velocity of 8ms when connected to a battery of 8 volts for 4 s. Find the current in the circuit if the battery supplied a constant current during the 4-second interval. (Assume no energy loss due to friction)
Answer» A toy train of mass 1 kg, starting from rest attains a velocity of $8 \frac{m}{s}$ when connected to a battery of 8 volts for 4 s. Find the current in the circuit if the battery supplied a constant current during the 4-second interval. (Assume no energy loss due to friction)

Discussion

14.	A sound source sends waves of 400 Hz. It produces waves of wavelength 2.5 m. The velocity of sound waves is:
Answer» A sound source sends waves of $400 H z$ . It produces waves of wavelength $2.5 m$ . The velocity of sound waves is:

Discussion

15.	What do you mean by buoyancy? [1 MARK]
Answer» What do you mean by buoyancy? [1 MARK]

Discussion

16.	Why speed of sound increases in solid?
Answer» Why speed of sound increases in solid?

Discussion

17.	A body in uniformly accelerated motion travels 200 cm in the first two seconds and 220 cm in the next four seconds. The velocity at the end of seventh second from start is
Answer» A body in uniformly accelerated motion travels 200 cm in the first two seconds and 220 cm in the next four seconds. The velocity at the end of seventh second from start is

Discussion

18.	What is a contact force? Give some examples.
Answer» What is a contact force? Give some examples.

Discussion

19.	Define gravitational force quantitatively.
Answer» Define gravitational force quantitatively.

Discussion

20.	Name the scientist who explained the motion of planets on the basis of gravitational force between the sun and planets.
Answer» Name the scientist who explained the motion of planets on the basis of gravitational force between the sun and planets.

Discussion

21.	An object is falling freely from a height x. After it has fallen a height x2, it will possess : (a) only potential energy (b) only kinetic energy (c) half potential and half kinetic energy (d) less potential and more kinetic energy
Answer» An object is falling freely from a height x. After it has fallen a height $\frac{x}{2}$ , it will possess : (a) only potential energy (b) only kinetic energy (c) half potential and half kinetic energy (d) less potential and more kinetic energy

21.

An object is falling freely from a height x. After it has fallen a height x2, it will possess : (a) only potential energy (b) only kinetic energy (c) half potential and half kinetic energy (d) less potential and more kinetic energy

Answer»

An object is falling freely from a height x. After it has fallen a height $\frac{x}{2}$ , it will possess :

(a) only potential energy

(b) only kinetic energy

(c) half potential and half kinetic energy

(d) less potential and more kinetic energy

Discussion

22.	A body of mass 2 kg is dropped from a building of height 5 m. The maximum kinetic energy the body can attain is:
Answer» A body of mass $2 k g$ is dropped from a building of height $5 m$ . The maximum kinetic energy the body can attain is:

Discussion

23.	Name the two factors on which the force needed to stop a moving body in a given time, depends.
Answer» Name the two factors on which the force needed to stop a moving body in a given time, depends.

Discussion

24.	Which of the following options will give a total potential of 10 volts if each of the individual battery is 2.5 V ?
Answer» Which of the following options will give a total potential of 10 volts if each of the individual battery is 2.5 V ?

Discussion

25.	Which of the following quantity of the body will change when taken to the moon from earth?
Answer» Which of the following quantity of the body will change when taken to the moon from earth?

Discussion

26.	What do you mean by 1hp
Answer» What do you mean by 1hp

Discussion

27.	A biker reduces the speed from 72 kmhr−1 to 36 kmhr−1 in 6 s. Calculate the acceleration in this case.
Answer» A biker reduces the speed from $72 k m h r^{- 1}$ to $36 k m h r^{- 1}$ in $6 s$ . Calculate the acceleration in this case.

Discussion

28.	In a circular motion, the direction of velocity at any point is along the __ to the circle.
Answer» In a circular motion, the direction of velocity at any point is along the __ to the circle.

Discussion

29.	What is the greatest height to which it will rise if a body is thrown vertically upward with a velocity of V
Answer» What is the greatest height to which it will rise if a body is thrown vertically upward with a velocity of V

Discussion

30.	A particle moves in a semi circular path with a speed of 5m/s. if the radius of the path is 10 m, find average acceleration during the motion.
Answer» A particle moves in a semi circular path with a speed of 5m/s. if the radius of the path is 10 m, find average acceleration during the motion.

Discussion

31.	Derive the law of conservation of momentum.
Answer» Derive the law of conservation of momentum.

Discussion

32.	When we stretch a rubber band what happens to the potential energy of the band?
Answer» When we stretch a rubber band what happens to the potential energy of the band?

Discussion

33.	Renewable source of energy is : (a) coal (b) fossil fuels (c) natural gas (d) sun.
Answer» Renewable source of energy is : (a) coal (b) fossil fuels (c) natural gas (d) sun.

33.

Renewable source of energy is : (a) coal (b) fossil fuels (c) natural gas (d) sun.

Answer»

Renewable source of energy is :

(a) coal (b) fossil fuels

(c) natural gas (d) sun.

Discussion

34.	Before Kepler could formulate his laws, he needed the calculations of which other scientist(s)?
Answer» Before Kepler could formulate his laws, he needed the calculations of which other scientist(s)?

Discussion

35.	How to represent velocity time graph for uniform acceleration Explain with steps
Answer» How to represent velocity time graph for uniform acceleration Explain with steps

35.

How to represent velocity time graph for uniform acceleration Explain with steps

Answer»

How to represent velocity time graph for uniform acceleration

Explain with steps

Discussion

36.	Which radiation or particle from radioactivity produces maximum biological damage?
Answer» Which radiation or particle from radioactivity produces maximum biological damage?

Discussion

37.	Whenever there is a force on magnetic pole, there exists:-
Answer» Whenever there is a force on magnetic pole, there exists:-

Discussion

38.	A balloon is flying up with a constant velocity of 5m/s. At a height of 100m, a stone is dropped from it. At the instant the stone reaches the ground level, the height of the balloon will be? ?
Answer» A balloon is flying up with a constant velocity of 5m/s. At a height of 100m, a stone is dropped from it. At the instant the stone reaches the ground level, the height of the balloon will be? ?

Discussion

39.	Name the form of mechanical energy, which is put to use.
Answer» Name the form of mechanical energy, which is put to use.

Discussion

40.	If a car travels a distance of 120 km with a speed of 80 km/h and returns with a speed of 60 km/h. Calculate the average velocity for the entire journey.
Answer» If a car travels a distance of 120 km with a speed of 80 km/h and returns with a speed of 60 km/h. Calculate the average velocity for the entire journey.

Discussion

41.	The unit torr is related to the barometric height as:
Answer» The unit torr is related to the barometric height as:

Discussion

42.	Distance is also taken with the direction in mind so why isnt it called a vector quantity like displacement..for eg..if one wants to go to a place one needs to know the distance and the direction in which he needs to proceed..
Answer» Distance is also taken with the direction in mind so why isnt it called a vector quantity like displacement..for eg..if one wants to go to a place one needs to know the distance and the direction in which he needs to proceed..

Discussion

43.	In a flight of 2800km an aircraft was slowed down due to bar weather. If average speed is reduced by 100km/hr and time increase by 30min find the original duration of the flight.
Answer» In a flight of 2800km an aircraft was slowed down due to bar weather. If average speed is reduced by 100km/hr and time increase by 30min find the original duration of the flight.

Discussion

44.	Gravitational force acts on all objects in proportional to their mass. Why then a heavy object does not fall faster than a light object
Answer» Gravitational force acts on all objects in proportional to their mass. Why then a heavy object does not fall faster than a light object

Discussion

45.	A person standing on the edge of a cliff at some height above the ground throws the first ball straight up with an initial velocity u and then throws the second ball straight down with the same initial velocity u. Which of the following statement is TRUE regarding their velocities when they hit the ground?
Answer» A person standing on the edge of a cliff at some height above the ground throws the first ball straight up with an initial velocity u and then throws the second ball straight down with the same initial velocity u. Which of the following statement is TRUE regarding their velocities when they hit the ground?

Discussion

46.	Two scooters starting from rest accelerate uniformly at the same rate. The second travels for twice the time of the first. Then the relation between the distance covered by the first scooter (s1) to that of the second scooter (s2) is
Answer» Two scooters starting from rest accelerate uniformly at the same rate. The second travels for twice the time of the first. Then the relation between the distance covered by the first scooter $(s_{1})$ to that of the second scooter $(s_{2})$ is

Discussion

47.	Which of the following does not affect the magnetic properties of a permanent magnet?
Answer» Which of the following does not affect the magnetic properties of a permanent magnet?

Discussion

48.	What causes buoyant force (or upthrust) on a boat ?
Answer» What causes buoyant force (or upthrust) on a boat ?

Discussion

49.	Four particles, each of mass m, are placed at the corners of a square of side a as shown in the figure. The position vector of the centre of mass is
Answer» Four particles, each of mass m, are placed at the corners of a square of side a as shown in the figure. The position vector of the centre of mass is

Discussion

50.	A cannonball (mass = 2 kg) is fired at a target of 500 meters away. The 400 kg cannon recoils with a velocity of 2 m/s. Assuming cannon ball moves with constant velocity, when will it hit the target?
Answer» A cannonball (mass = 2 kg) is fired at a target of 500 meters away. The 400 kg cannon recoils with a velocity of 2 m/s. Assuming cannon ball moves with constant velocity, when will it hit the target?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The average orbital distance of Mars is 1.52 times the average orbital distance of the Earth. Knowing that the Earth orbits the sun in approximately 365 days, time for mars orbit around the sun would be

While dusting a carpet we beat it with a stick because:

Two balls of the same size but of different materials, rubber and iron are kept on the smooth floor of a moving train. The brakes are applied suddenly to stop the train. The balls start rolling in the direction

The soft iron is used as the core of an electromagnet because

We have an electric kettle rated at 60V,5A that runs for 5 minutes. The same amount of energy is used to accelerate a mass of 10kg. What is the velocity attained​ by the​​​​​​ mass?

Calculate the effective potential difference for the cells in series given below.

Question 1 A bus starting from rest moves with a uniform acceleration of 0.1 ms−2 for 2 minutes. Find (a) the speed acquired, (b) the distance travelled.

Is displacement a scalar quantity?

A motorcycle is being driven at a speed of 20 m/s when brakes are applied to bring it to rest in five seconds. The deceleration produced in this case will be : (a) +4 m s2 (b)−4 m s2 (c) +0.25 m s2 (d) −0.25 m s2

The energy conversion in a steam engine is

Which of the following relations hold good where F is the focal length and R is the radius of curvature.

Action and reaction are pair of forces which acts on __ body(s).

A toy train of mass 1 kg, starting from rest attains a velocity of 8ms when connected to a battery of 8 volts for 4 s. Find the current in the circuit if the battery supplied a constant current during the 4-second interval. (Assume no energy loss due to friction)

A sound source sends waves of 400 Hz. It produces waves of wavelength 2.5 m. The velocity of sound waves is:

What do you mean by buoyancy? [1 MARK]

Why speed of sound increases in solid?

A body in uniformly accelerated motion travels 200 cm in the first two seconds and 220 cm in the next four seconds. The velocity at the end of seventh second from start is

What is a contact force? Give some examples.

Define gravitational force quantitatively.

Name the scientist who explained the motion of planets on the basis of gravitational force between the sun and planets.

An object is falling freely from a height x. After it has fallen a height x2, it will possess : (a) only potential energy (b) only kinetic energy (c) half potential and half kinetic energy (d) less potential and more kinetic energy

A body of mass 2 kg is dropped from a building of height 5 m. The maximum kinetic energy the body can attain is:

Name the two factors on which the force needed to stop a moving body in a given time, depends.

Which of the following options will give a total potential of 10 volts if each of the individual battery is 2.5 V ?

Which of the following quantity of the body will change when taken to the moon from earth?

What do you mean by 1hp

A biker reduces the speed from 72 kmhr−1 to 36 kmhr−1 in 6 s. Calculate the acceleration in this case.

In a circular motion, the direction of velocity at any point is along the __ to the circle.

What is the greatest height to which it will rise if a body is thrown vertically upward with a velocity of V

A particle moves in a semi circular path with a speed of 5m/s. if the radius of the path is 10 m, find average acceleration during the motion.

Derive the law of conservation of momentum.

When we stretch a rubber band what happens to the potential energy of the band?

Renewable source of energy is : (a) coal (b) fossil fuels (c) natural gas (d) sun.

Before Kepler could formulate his laws, he needed the calculations of which other scientist(s)?

How to represent velocity time graph for uniform acceleration Explain with steps

Which radiation or particle from radioactivity produces maximum biological damage?

Whenever there is a force on magnetic pole, there exists:-

A balloon is flying up with a constant velocity of 5m/s. At a height of 100m, a stone is dropped from it. At the instant the stone reaches the ground level, the height of the balloon will be? ?

Name the form of mechanical energy, which is put to use.

If a car travels a distance of 120 km with a speed of 80 km/h and returns with a speed of 60 km/h. Calculate the average velocity for the entire journey.

The unit torr is related to the barometric height as:

Distance is also taken with the direction in mind so why isnt it called a vector quantity like displacement..for eg..if one wants to go to a place one needs to know the distance and the direction in which he needs to proceed..

In a flight of 2800km an aircraft was slowed down due to bar weather. If average speed is reduced by 100km/hr and time increase by 30min find the original duration of the flight.

Gravitational force acts on all objects in proportional to their mass. Why then a heavy object does not fall faster than a light object

Two scooters starting from rest accelerate uniformly at the same rate. The second travels for twice the time of the first. Then the relation between the distance covered by the first scooter (s1) to that of the second scooter (s2) is

Which of the following does not affect the magnetic properties of a permanent magnet?

What causes buoyant force (or upthrust) on a boat ?

Four particles, each of mass m, are placed at the corners of a square of side a as shown in the figure. The position vector of the centre of mass is

A cannonball (mass = 2 kg) is fired at a target of 500 meters away. The 400 kg cannon recoils with a velocity of 2 m/s. Assuming cannon ball moves with constant velocity, when will it hit the target?

We have an electric kettle rated at 60V,5A that runs for 5 minutes. The same amount of energy is used to accelerate a mass of 10kg. What is the velocity attained by the mass?