13232 + Interview Questions in Physics

1.	Why do paratroopers roll on landing?
Answer» Why do paratroopers roll on landing?

Discussion

2.	When a satellite moves in a circular orbit, the _______acceleration is provided by the gravitational attraction of the earth.
Answer» When a satellite moves in a circular orbit, the _______acceleration is provided by the gravitational attraction of the earth.

Discussion

3.	In a model hydraulic lift, a force of 1 N is exerted on one arm which moves it by 20 cm. By what distance does the other arm move if the force experienced at the other end is 10 N?
Answer» In a model hydraulic lift, a force of 1 N is exerted on one arm which moves it by 20 cm. By what distance does the other arm move if the force experienced at the other end is 10 N?

Discussion

4.	Write the names of two units of length smaller than a metre. Express their relationship with metre.
Answer» Write the names of two units of length smaller than a metre. Express their relationship with metre.

Discussion

5.	One Hertz is equal to
Answer» One Hertz is equal to

Discussion

6.	An artificial planet is moving in a circular orbit of radius 42250 km. Calculate its speed if it takes 24 hours to revolve around the earth.
Answer» An artificial planet is moving in a circular orbit of radius $42250 k m$ . Calculate its speed if it takes $24 h o u r s$ to revolve around the earth.

Discussion

7.	Choose the correct option:
Answer» Choose the correct option:

Discussion

8.	A man pushes on a wall out of frustration with a force of 30 Newton. What force does the wall exert on the man?
Answer» A man pushes on a wall out of frustration with a force of 30 Newton. What force does the wall exert on the man?

Discussion

9.	Question 74 The diameter of Earth is 12756000 m. In 1996, a new planet was discovered, whose diameter is 586 of the diameter of Earth. Find the diameter of this planet in km.
Answer» Question 74 The diameter of Earth is 12756000 m. In 1996, a new planet was discovered, whose diameter is $\frac{5}{86}$ of the diameter of Earth. Find the diameter of this planet in km.

9.

Question 74 The diameter of Earth is 12756000 m. In 1996, a new planet was discovered, whose diameter is 586 of the diameter of Earth. Find the diameter of this planet in km.

Answer»

Question 74

The diameter of Earth is 12756000 m. In 1996, a new planet was discovered, whose diameter is $\frac{5}{86}$ of the diameter of Earth. Find the diameter of this planet in km.

Discussion

10.	Can a gravitional force be repulsive in nature
Answer» Can a gravitional force be repulsive in nature

Discussion

11.	A bus decreases its speed from 80 km km h-1 to 60 kmh-1 in 5s find the acceleration of the bus I I have a doubt in thid questions why are multiplying with 80×5/18 and in velocity we are writing 60×5/18 why we are writing 5 /18 for this
Answer» A bus decreases its speed from 80 km km h-1 to 60 kmh-1 in 5s find the acceleration of the bus I I have a doubt in thid questions why are multiplying with 80×5/18 and in velocity we are writing 60×5/18 why we are writing 5 /18 for this

Discussion

12.	The variation of velocity of a particle moving along a straight line in a certain time interval is shown below. What is the distance travelled during acceleration?
Answer» The variation of velocity of a particle moving along a straight line in a certain time interval is shown below. What is the distance travelled during acceleration?

12.

The variation of velocity of a particle moving along a straight line in a certain time interval is shown below. What is the distance travelled during acceleration?

Answer»

The variation of velocity of a particle moving along a straight line in a certain time interval is shown below. What is the distance

travelled during acceleration?

Discussion

13.	Q. Does temperature, humidity and rainy season effect the speed of sound in air?
Answer» Q. Does temperature, humidity and rainy season effect the speed of sound in air?

Discussion

14.	How does a compass work? Is its needle only a magnet or even the north pole marked on the compass is a magnet ?
Answer» How does a compass work? Is its needle only a magnet or even the north pole marked on the compass is a magnet ?

Discussion

15.	The relative density of mercury is 13.6. What does this statement mean ?
Answer» The relative density of mercury is 13.6. What does this statement mean ?

Discussion

16.	Q.Clear the confusion that acceleration of a uniform velocity is 0(Line which is parallel to x axis) and the acceleration is above 0 also when there is uniform velocity(straight line) ?
Answer» Q.Clear the confusion that acceleration of a uniform velocity is 0(Line which is parallel to x axis) and the acceleration is above 0 also when there is uniform velocity(straight line) ?

Discussion

17.	A lead bullet penetrates into a solid object and melts. Assuming that 50% of its kinetic energy was used to heat it, calculate the initial speed of the bullet. The initial temperature of the bullet is 27∘C and its melting point is 327∘C. Latent heat of fusion of lead = 2.5 × 104 J kg−1 and specific heat capacity of lead = 125 J kg1 K1.
Answer» A lead bullet penetrates into a solid object and melts. Assuming that 50% of its kinetic energy was used to heat it, calculate the initial speed of the bullet. The initial temperature of the bullet is $27^{\circ} C$ and its melting point is $327^{\circ} C$ . Latent heat of fusion of lead = $2.5 \times 10^{4} J k g^{- 1}$ and specific heat capacity of lead = $125 J k g^{1} K^{1}$ .

Discussion

18.	A mass of 5 kg is acted upon by a force of 1 Newton starting from rest how much distance is covered by the mass in 20 seconds
Answer» A mass of 5 kg is acted upon by a force of 1 Newton starting from rest how much distance is covered by the mass in 20 seconds

Discussion

19.	Two plastic spheres of masses 10 g and 20 g are moving in a straight line in the same direction with velocities of 3 ms–1 and 2 ms–1 respectively. They collide with each other and after collision the plastic sphere of mass 10 g moves with a velocity of 2.5 ms–1. Find the velocity of the second ball after collision.
Answer» Two plastic spheres of masses 10 g and 20 g are moving in a straight line in the same direction with velocities of 3 ms^–1 and 2 ms^–1 respectively. They collide with each other and after collision the plastic sphere of mass 10 g moves with a velocity of 2.5 ms^–1. Find the velocity of the second ball after collision.

Discussion

20.	the blocks of masses 2kg in 1 kg respectively are tied to the end of string passing over a light frictionless pulley. the masses are held at the same horizontal level and then released. The distance travelled by the centre of mass in 2 seconds is
Answer» the blocks of masses 2kg in 1 kg respectively are tied to the end of string passing over a light frictionless pulley. the masses are held at the same horizontal level and then released. The distance travelled by the centre of mass in 2 seconds is

Discussion

21.	A resistive force of 16 N acts on a ball of mass 40 g continuously. If the initial velocity of the ball is 24 ms-1 ,the time taken by it to come to rest is:
Answer» A resistive force of 16 N acts on a ball of mass 40 g continuously. If the initial velocity of the ball is 24 ms^-1 ,the time taken by it to come to rest is:

Discussion

22.	Sound waves travels fastest in
Answer» Sound waves travels fastest in

Discussion

23.	A force of magnitude 25 N acting on a body of mass 2 kg increases its kinetic energy from 100 J to 200 J. The displacement of the body(in metres) during this interval is
Answer» A force of magnitude 25 N acting on a body of mass 2 kg increases its kinetic energy from 100 J to 200 J. The displacement of the body(in metres) during this interval is

Discussion

24.	Which of the following device is not the source of current?
Answer» Which of the following device is not the source of current?

Discussion

25.	A body when acted upon by a force of 10 kgf moves to a distac=nce 0.5 m in the direction of force. Find the work done by the force. take 1 kgf = 10 N.
Answer» A body when acted upon by a force of 10 kgf moves to a distac=nce 0.5 m in the direction of force. Find the work done by the force. take 1 kgf = 10 N.

Discussion

26.	The speed of sound in water is 1500 metres per second. How far away from an under-sea rock should a deep sea diver be so that he can hear his own echo ?
Answer» The speed of sound in water is 1500 metres per second. How far away from an under-sea rock should a deep sea diver be so that he can hear his own echo ?

Discussion

27.	Explain the Kepler's law of gravitation.
Answer» Explain the Kepler's law of gravitation.

Discussion

28.	Two bodies are dropped from the same height at the same time on the surface of the moon. They will have
Answer» Two bodies are dropped from the same height at the same time on the surface of the moon. They will have

Discussion

29.	Tinku dropped a stone into a well of depth 180 m at time t = 0. He heard a sound after time t = x. What is the value of x. Take acceleration due to gravity, g=10 ms−2 and vsound=340 ms−1.
Answer» Tinku dropped a stone into a well of depth $180 m$ at time $t = 0$ . He heard a sound after time $t = x$ . What is the value of $x$ . Take acceleration due to gravity, $g = 10 m s^{- 2}$ and $v_{s o u n d} = 340 m s^{- 1}$ .

Discussion

30.	The direction of rotation of a DC motor, as shown below, is in the clockwise direction. The direction of the magnetic field is ___.
Answer» The direction of rotation of a DC motor, as shown below, is in the clockwise direction. The direction of the magnetic field is ___.

Discussion

31.	A stone dropped from a tower reaches the ground in 5 s. The height of the tower is___ m
Answer» A stone dropped from a tower reaches the ground in 5 s. The height of the tower is___ m

Discussion

32.	What are scalar and vector quantities?
Answer» What are scalar and vector quantities?

Discussion

33.	Ram collected some rainwater as his teacher told him that rainwater is equivalent to distilled water. He randomly tested the rainwater to confirm wheather his teacher is right or not. He observe something in the magnetic compass.Can you state the reason for the deflection of the compass?
Answer» Ram collected some rainwater as his teacher told him that rainwater is equivalent to distilled water. He randomly tested the rainwater to confirm wheather his teacher is right or not. He observe something in the magnetic compass.Can you state the reason for the deflection of the compass?

Discussion

34.	How do astronomers talk to each other on the moon
Answer» How do astronomers talk to each other on the moon

Discussion

35.	Two simple pendulums A and B have length 1.0 m and 4.0 m respectively at a certain place. Which pendulum will make more oscillations in 1 minute ? Explain your answer.
Answer» Two simple pendulums A and B have length 1.0 m and 4.0 m respectively at a certain place. Which pendulum will make more oscillations in 1 minute ? Explain your answer.

Discussion

36.	Compare approximately the speed of sound in air, water and steel.
Answer» Compare approximately the speed of sound in air, water and steel.

Discussion

37.	The total path length covered by an object is known as___
Answer» The total path length covered by an object is known as___

Discussion

38.	The Melting point of ice:
Answer» The Melting point of ice:

Discussion

39.	1) Explain how defecrs in a metal block can be detected usngu ultra sound
Answer» 1) Explain how defecrs in a metal block can be detected usngu ultra sound

Discussion

40.	What is the relationship between : 1) acceleration and mass of the body 2) force and acceleration
Answer» What is the relationship between : 1) acceleration and mass of the body 2) force and acceleration

Discussion

41.	will the heavy object fall faster than the lighter one in presence of air if they are of same material amd shape?
Answer» will the heavy object fall faster than the lighter one in presence of air if they are of same material amd shape?

Discussion

42.	An automobile of mass m accelerates, starting from rest, with the engine supplying constant power 'P'. How the velocity of the automobile vary with time?
Answer» An automobile of mass m accelerates, starting from rest, with the engine supplying constant power 'P'. How the velocity of the automobile vary with time?

Discussion

43.	Velocity of a body can never be greater than its speed. Comment Please Answer urgently Regards CJ
Answer» Velocity of a body can never be greater than its speed. Comment Please Answer urgently Regards CJ

Discussion

44.	The equation for gravitational force is GMm/d^2. And in the equation, G is said as constant of proportionality. In the next question given as example in the video of Universal Law. In the next question, in which sir proved that why we humans are not attracted by gravity. In that question, M1 is 50 kgs. and M2 is also 50 kgs. and D is 1 m. But how did sir calculated the G thing. How to calculate the G if required.
Answer» The equation for gravitational force is GMm/d^2. And in the equation, G is said as constant of proportionality. In the next question given as example in the video of Universal Law. In the next question, in which sir proved that why we humans are not attracted by gravity. In that question, M1 is 50 kgs. and M2 is also 50 kgs. and D is 1 m. But how did sir calculated the G thing. How to calculate the G if required.

Discussion

45.	A particle of mass 1 kg was sliding with a velocity of 10 m/s on a rough floor. It comes to rest after 5 s. The rate at which the floor warms up(in watts) is
Answer» A particle of mass 1 kg was sliding with a velocity of 10 m/s on a rough floor. It comes to rest after 5 s. The rate at which the floor warms up(in watts) is

Discussion

46.	An aircraft travelling at 600km/h accelerates steadily at 10 km/h . Taking the speed of sound as 1100 km/h at the aircraft's altitude , how long will it take to reach sound barrier?
Answer» An aircraft travelling at 600km/h accelerates steadily at 10 km/h . Taking the speed of sound as 1100 km/h at the aircraft's altitude , how long will it take to reach sound barrier?

Discussion

47.	A hypothetical planet has density ρ, radius R, and surface gravitational acceleration g. If the radius of the planet is doubled, but the planetary density stayed the same, the acceleration due to gravity at the planet’s surface would be
Answer» A hypothetical planet has density $ρ$ , radius R, and surface gravitational acceleration g. If the radius of the planet is doubled, but the planetary density stayed the same, the acceleration due to gravity at the planet’s surface would be

Discussion

48.	A train at a speed od 90km/hr. Breaks are appliedso as to produce the uniform acceleration of -0.5m/sec2. Find the distance the train travelled befor it is brought back to rest.
Answer» A train at a speed od 90km/hr. Breaks are appliedso as to produce the uniform acceleration of -0.5m/sec2. Find the distance the train travelled befor it is brought back to rest.

Discussion

49.	The acceleration of an object moving in a straight line can be determined from:
Answer» The acceleration of an object moving in a straight line can be determined from:

Discussion

50.	A body weighs 20gf in air, 18.2gf in a liquid and 18.0gf in water. Calculate the relative density of the body and the liquid.
Answer» A body weighs 20gf in air, 18.2gf in a liquid and 18.0gf in water. Calculate the relative density of the body and the liquid.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Why do paratroopers roll on landing?

When a satellite moves in a circular orbit, the _______acceleration is provided by the gravitational attraction of the earth.

In a model hydraulic lift, a force of 1 N is exerted on one arm which moves it by 20 cm. By what distance does the other arm move if the force experienced at the other end is 10 N?

Write the names of two units of length smaller than a metre. Express their relationship with metre.

One Hertz is equal to

An artificial planet is moving in a circular orbit of radius 42250 km. Calculate its speed if it takes 24 hours to revolve around the earth.

Choose the correct option:

A man pushes on a wall out of frustration with a force of 30 Newton. What force does the wall exert on the man?

Question 74 The diameter of Earth is 12756000 m. In 1996, a new planet was discovered, whose diameter is 586 of the diameter of Earth. Find the diameter of this planet in km.

Can a gravitional force be repulsive in nature

A bus decreases its speed from 80 km km h-1 to 60 kmh-1 in 5s find the acceleration of the bus I I have a doubt in thid questions why are multiplying with 80×5/18 and in velocity we are writing 60×5/18 why we are writing 5 /18 for this

The variation of velocity of a particle moving along a straight line in a certain time interval is shown below. What is the distance travelled during acceleration?

Q. Does temperature, humidity and rainy season effect the speed of sound in air?

How does a compass work? Is its needle only a magnet or even the north pole marked on the compass is a magnet ?

The relative density of mercury is 13.6. What does this statement mean ?

Q.Clear the confusion that acceleration of a uniform velocity is 0(Line which is parallel to x axis) and the acceleration is above 0 also when there is uniform velocity(straight line) ?

A mass of 5 kg is acted upon by a force of 1 Newton starting from rest how much distance is covered by the mass in 20 seconds

the blocks of masses 2kg in 1 kg respectively are tied to the end of string passing over a light frictionless pulley. the masses are held at the same horizontal level and then released. The distance travelled by the centre of mass in 2 seconds is

A resistive force of 16 N acts on a ball of mass 40 g continuously. If the initial velocity of the ball is 24 ms-1 ,the time taken by it to come to rest is:

Sound waves travels fastest in

A force of magnitude 25 N acting on a body of mass 2 kg increases its kinetic energy from 100 J to 200 J. The displacement of the body(in metres) during this interval is

Which of the following device is not the source of current?

A body when acted upon by a force of 10 kgf moves to a distac=nce 0.5 m in the direction of force. Find the work done by the force. take 1 kgf = 10 N.

The speed of sound in water is 1500 metres per second. How far away from an under-sea rock should a deep sea diver be so that he can hear his own echo ?

Explain the Kepler's law of gravitation.

Two bodies are dropped from the same height at the same time on the surface of the moon. They will have

Tinku dropped a stone into a well of depth 180 m at time t = 0. He heard a sound after time t = x. What is the value of x. Take acceleration due to gravity, g=10 ms−2 and vsound=340 ms−1.

The direction of rotation of a DC motor, as shown below, is in the clockwise direction. The direction of the magnetic field is ___.

A stone dropped from a tower reaches the ground in 5 s. The height of the tower is___ m

What are scalar and vector quantities?

Ram collected some rainwater as his teacher told him that rainwater is equivalent to distilled water. He randomly tested the rainwater to confirm wheather his teacher is right or not. He observe something in the magnetic compass.Can you state the reason for the deflection of the compass?

How do astronomers talk to each other on the moon

Two simple pendulums A and B have length 1.0 m and 4.0 m respectively at a certain place. Which pendulum will make more oscillations in 1 minute ? Explain your answer.

Compare approximately the speed of sound in air, water and steel.

The total path length covered by an object is known as___

The Melting point of ice:

1) Explain how defecrs in a metal block can be detected usngu ultra sound

What is the relationship between : 1) acceleration and mass of the body 2) force and acceleration

will the heavy object fall faster than the lighter one in presence of air if they are of same material amd shape?

An automobile of mass m accelerates, starting from rest, with the engine supplying constant power 'P'. How the velocity of the automobile vary with time?

Velocity of a body can never be greater than its speed. Comment Please Answer urgently Regards CJ

A particle of mass 1 kg was sliding with a velocity of 10 m/s on a rough floor. It comes to rest after 5 s. The rate at which the floor warms up(in watts) is

An aircraft travelling at 600km/h accelerates steadily at 10 km/h . Taking the speed of sound as 1100 km/h at the aircraft's altitude , how long will it take to reach sound barrier?

A hypothetical planet has density ρ, radius R, and surface gravitational acceleration g. If the radius of the planet is doubled, but the planetary density stayed the same, the acceleration due to gravity at the planet’s surface would be

A train at a speed od 90km/hr. Breaks are appliedso as to produce the uniform acceleration of -0.5m/sec2. Find the distance the train travelled befor it is brought back to rest.

The acceleration of an object moving in a straight line can be determined from:

A body weighs 20gf in air, 18.2gf in a liquid and 18.0gf in water. Calculate the relative density of the body and the liquid.