13232 + Interview Questions in Physics

1.	Which of the following layers of the atmosphere will have the lowest pressure?
Answer» Which of the following layers of the atmosphere will have the lowest pressure?

Discussion

2.	A uniform metal rod of length L and mass M is rotating with an angular speed ω about an axis passing through one of the ends and perpendicular to the rod. If the temperature increases by t∘C, then the change in its angular speed is proportional to
Answer» A uniform metal rod of length $L$ and mass $M$ is rotating with an angular speed $ω$ about an axis passing through one of the ends and perpendicular to the rod. If the temperature increases by $t^{\circ} C,$ then the change in its angular speed is proportional to

Discussion

3.	What is the distance covered by a car in 4 h if it is moving with a speed of 35 km/h?
Answer» What is the distance covered by a car in 4 h if it is moving with a speed of 35 km/h?

Discussion

4.	An object of mass 100kg is accelerated uniformly from a velocity of 5m/s to 8m/s in 6s.Calculate the initial and final momentum of the object.Also,find the magnitude of the force exerted on the object.
Answer» An object of mass 100kg is accelerated uniformly from a velocity of 5m/s to 8m/s in 6s.Calculate the initial and final momentum of the object.Also,find the magnitude of the force exerted on the object.

Discussion

5.	A uniform rod of length l=100 cm is bent at its mid-point to make 90∘ angle. The distance of the centre of mass from the centre of the rod is
Answer» A uniform rod of length $l = 100 c m$ is bent at its mid-point to make $90^{\circ}$ angle. The distance of the centre of mass from the centre of the rod is

Discussion

6.	The word magnet has been derived from ___.
Answer» The word magnet has been derived from ___.

Discussion

7.	Bigger the least count of an instrument, ___ the accuracy of the measurement made by the instrument.
Answer» Bigger the least count of an instrument, ___ the accuracy of the measurement made by the instrument.

Discussion

8.	Two identical geostationary satellites are moving with equal speed in the same orbit but their sense of rotation brings them on a collision course. The debris will (1) Fall down (2) Move up (3) Move east to west in same orbit (4) Move from West to East in same orbit
Answer» Two identical geostationary satellites are moving with equal speed in the same orbit but their sense of rotation brings them on a collision course. The debris will (1) Fall down (2) Move up (3) Move east to west in same orbit (4) Move from West to East in same orbit

8.

Two identical geostationary satellites are moving with equal speed in the same orbit but their sense of rotation brings them on a collision course. The debris will (1) Fall down (2) Move up (3) Move east to west in same orbit (4) Move from West to East in same orbit

Answer»

Two identical geostationary satellites are moving with equal speed in the same orbit but their sense of rotation brings them on a collision course. The debris will

(1) Fall down

(2) Move up

(3) Move east to west in same orbit

(4) Move from West to East in same orbit

Discussion

9.	A combination of wood and iron, just floats in the water at room temperature. Explain what you will observe when the water is heated.
Answer» A combination of wood and iron, just floats in the water at room temperature. Explain what you will observe when the water is heated.

Discussion

10.	A student, while performing an experiment using a screw gauge, observes that the screw moves 3 mm on the pitch scale when 6 complete rotations of the head scale are given. What is the pitch of the screw gauge?
Answer» A student, while performing an experiment using a screw gauge, observes that the screw moves 3 mm on the pitch scale when 6 complete rotations of the head scale are given. What is the pitch of the screw gauge?

Discussion

11.	Choose the correct statement about seismic waves:
Answer» Choose the correct statement about seismic waves:

Discussion

12.	A-What is reverberation how can it be reduced B-A sound wave travels at a speed of 399 metre per second if the wavelength is 1.5 m what is the frequency of the wave will it be audible C-Why are the ceilings of concert halls curved
Answer» A-What is reverberation how can it be reduced B-A sound wave travels at a speed of 399 metre per second if the wavelength is 1.5 m what is the frequency of the wave will it be audible C-Why are the ceilings of concert halls curved

12.

A-What is reverberation how can it be reduced B-A sound wave travels at a speed of 399 metre per second if the wavelength is 1.5 m what is the frequency of the wave will it be audible C-Why are the ceilings of concert halls curved

Answer»

A-What is reverberation how can it be reduced

B-A sound wave travels at a speed of 399 metre per second if the wavelength is 1.5 m what is the frequency of the wave will it be audible

C-Why are the ceilings of concert halls curved

Discussion

13.	Question 4 Define average power.
Answer» Question 4 Define average power.

Discussion

14.	Why does dead body float on water ?
Answer» Why does dead body float on water ?

Discussion

15.	Question 7 (b) A 8000 kg engine pulls a train of 5 wagons, each of 2000 kg, along a horizontal track. If the engine exerts a force of 40000 N and the track offers a friction force of 5000 N, then calculate: (b) the acceleration of the train.
Answer» Question 7 (b) A 8000 kg engine pulls a train of 5 wagons, each of 2000 kg, along a horizontal track. If the engine exerts a force of 40000 N and the track offers a friction force of 5000 N, then calculate: (b) the acceleration of the train.

Discussion

16.	Name the physical quantity which gives us an idea of how slow or fast a body is moving.
Answer» Name the physical quantity which gives us an idea of how slow or fast a body is moving.

Discussion

17.	Who suggested the distribution of electrons into different shells? How are the electrons distributed across these shells? [5 MARKS]
Answer» Who suggested the distribution of electrons into different shells? How are the electrons distributed across these shells? [5 MARKS]

Discussion

18.	What do you mean by the frequency of a sound wave? [1 MARK]
Answer» What do you mean by the frequency of a sound wave? [1 MARK]

Discussion

19.	(1).I need all three Newton's law with the correct statement. (2).Inertia and mass. (3).All the formula's of force and laws of motion chapter. (4). Mathematical formulation of second law of motion. (5). Conservation of momentum.
Answer» (1).I need all three Newton's law with the correct statement. (2).Inertia and mass. (3).All the formula's of force and laws of motion chapter. (4). Mathematical formulation of second law of motion. (5). Conservation of momentum.

19.

(1).I need all three Newton's law with the correct statement. (2).Inertia and mass. (3).All the formula's of force and laws of motion chapter. (4). Mathematical formulation of second law of motion. (5). Conservation of momentum.

Answer»

(1).I need all three Newton's law with the correct statement.

(2).Inertia and mass.

(3).All the formula's of force and laws of motion chapter.

(4). Mathematical formulation of second law of motion.

(5). Conservation of momentum.

Discussion

20.	A bullet of mass 50g moving with an initial velocity 100m/s strikes a wooden block and comes to rest after penetrating a distance of 2 cm. Calculate the retardation caused by the wooden block
Answer» A bullet of mass 50g moving with an initial velocity 100m/s strikes a wooden block and comes to rest after penetrating a distance of 2 cm. Calculate the retardation caused by the wooden block

Discussion

21.	Find the difference between the heights of two towers A and B, if the height of tower A and tower B is 112 m and 17575 cm tall respectively.
Answer» Find the difference between the heights of two towers A and B, if the height of tower A and tower B is $112 m$ and $17575 c m$ tall respectively.

Discussion

22.	If two masses m1 and m2 collide with each other. The velocities before collision are u1 and u2 respectively. After the collision, the velocities are v1and v2 respectively. What is the final momentum after the collision?
Answer» If two masses m₁ and m₂ collide with each other. The velocities before collision are $u_{1}$ and $u_{2}$ respectively. After the collision, the velocities are $v_{1}$ and $v_{2}$ respectively. What is the final momentum after the collision?

Discussion

23.	A person travels a distance of 5 m towards East, then 4 m towards North and then 2 m towards West. (i) Calculate the total distance travelled. (ii) Calculate the net displacement. [2 MARKS]
Answer» A person travels a distance of 5 m towards East, then 4 m towards North and then 2 m towards West. (i) Calculate the total distance travelled. (ii) Calculate the net displacement. [2 MARKS]

Discussion

24.	Which of the following could not be a unit of speed ? (a) km/h (b) s/m (c) m/s (d) mmS−1
Answer» Which of the following could not be a unit of speed ? (a) km/h (b) s/m (c) m/s (d) mm $S^{- 1}$

24.

Which of the following could not be a unit of speed ? (a) km/h (b) s/m (c) m/s (d) mmS−1

Answer»

Which of the following could not be a unit of speed ?

(a) km/h

(b) s/m

(c) m/s

(d) mm $S^{- 1}$

Discussion

25.	What is the difference between inertia and momentum?
Answer» What is the difference between inertia and momentum?

Discussion

26.	What is a vacuum? Explain why sound cannot travel through a vacuum.
Answer» What is a vacuum? Explain why sound cannot travel through a vacuum.

Discussion

27.	The velocity of a car is 18 m/s. Express this velocity in km/h.
Answer» The velocity of a car is 18 m/s. Express this velocity in km/h.

Discussion

28.	The pitch of a scrw gauge is 0.5 mm and the head scale is divided in 100 parts. What is the least count of screw gauge ?
Answer» The pitch of a scrw gauge is 0.5 mm and the head scale is divided in 100 parts. What is the least count of screw gauge ?

Discussion

29.	A car is moving in a straight line with speed 18 km/hr. It is stopped in 5s by applying the brakes. Find (i) the retardation and (ii) speed of the car after 2s of applying the brakes.
Answer» A car is moving in a straight line with speed 18 km/hr. It is stopped in 5s by applying the brakes. Find (i) the retardation and (ii) speed of the car after 2s of applying the brakes.

Discussion

30.	What will happen to value of g if we go inside the earth and what will happen to the value of g if we go at the center of the earth .why explain brefly?
Answer» What will happen to value of g if we go inside the earth and what will happen to the value of g if we go at the center of the earth .why explain brefly?

Discussion

31.	A car of mass 1200 km moving at a speed of 36 km / hr was brought to rest in 20 m by applying brakes. What is the magnitude of constant braking force acting on the car?
Answer» A car of mass 1200 km moving at a speed of 36 km / hr was brought to rest in 20 m by applying brakes. What is the magnitude of constant braking force acting on the car?

Discussion

32.	From a rifle Mass 4 kg, a bullet of mass 50g is fired with an initial velocity of 35m/s. Calculate the initial recoil velocity of the rifle
Answer» From a rifle Mass 4 kg, a bullet of mass 50g is fired with an initial velocity of 35m/s. Calculate the initial recoil velocity of the rifle

Discussion

33.	Why is uniform circular motion known as an accelerated motion?
Answer» Why is uniform circular motion known as an accelerated motion?

Discussion

34.	A bus decreases its speed from 80 km/h to 60 km/h in 5 seconds. Find the acceleration of the bus.
Answer» A bus decreases its speed from 80 km/h to 60 km/h in 5 seconds. Find the acceleration of the bus.

Discussion

35.	How much of the energy in burning coal reaches the consumer as electricity?
Answer» How much of the energy in burning coal reaches the consumer as electricity?

35.

How much of the energy in burning coal reaches the consumer as electricity?

Answer»

How much of the energy in burning coal reaches the consumer as electricity?

Discussion

36.	Why is sea water denser than normal water?
Answer» Why is sea water denser than normal water?

Discussion

37.	Draw graphs to show the dependence of (i) acceleration on force for a constant mass, and (ii) force on mass for a constant acceleration.
Answer» Draw graphs to show the dependence of (i) acceleration on force for a constant mass, and (ii) force on mass for a constant acceleration.

Discussion

38.	Mn and Mp represent mass of neutron and proton respectively. If an element having nuclear mass M has N-neutron and Z-proton, then the correct relation will be
Answer» $M_{n}$ and $M_{p}$ represent mass of neutron and proton respectively. If an element having nuclear mass M has N-neutron and Z-proton, then the correct relation will be

Discussion

39.	What will be the transfer of momentum when a dumb bell of mass 15 kg falls from a height of 50cm and does not rebound? ( Take its downward acceleration to be 10 ms-2)
Answer» What will be the transfer of momentum when a dumb bell of mass 15 kg falls from a height of 50cm and does not rebound? ( Take its downward acceleration to be 10 ms^-2)

Discussion

40.	What is acceleration ? Write it's unit
Answer» What is acceleration ? Write it's unit

Discussion

41.	Dave Kunst is the first person verified to have completely circled the entire earth on foot in 4 years. Let us assume he traveled in a perfect circle around the earth and the center of his circle is same as the center of the earth. If he traveled through a tunnel through the center of the earth penetrating to other side of earth at the same average speed, how much time would he have taken?
Answer» Dave Kunst is the first person verified to have completely circled the entire earth on foot in 4 years. Let us assume he traveled in a perfect circle around the earth and the center of his circle is same as the center of the earth. If he traveled through a tunnel through the center of the earth penetrating to other side of earth at the same average speed, how much time would he have taken?

Discussion

42.	In a football and stone of same size, the inertia of
Answer» In a football and stone of same size, the inertia of

Discussion

43.	For a body of mass 5kg, initially at rest, the force - time graph is as shown, choose the correct statement.
Answer» For a body of mass 5kg, initially at rest, the force - time graph is as shown, choose the correct statement.

43.

For a body of mass 5kg, initially at rest, the force - time graph is as shown, choose the correct statement.

Answer»

For a body of mass 5kg, initially at rest, the force - time graph is as shown, choose the correct statement.

Discussion

44.	Choose the approximate mass of the earth from the following?
Answer» Choose the approximate mass of the earth from the following?

Discussion

45.	The facilities that use burnt waste in order to generate electricity are better known as __________
Answer» The facilities that use burnt waste in order to generate electricity are better known as __________

Discussion

46.	Abdul while driving to school, commutes the average speed For his trip to be 20km h-1 . On his return trip along the same route,there is less traffic and the average speed is 30km h-1 .whatis the average speed for Abdul's trip (please show every step)
Answer» Abdul while driving to school, commutes the average speed For his trip to be 20km h^-1 . On his return trip along the same route,there is less traffic and the average speed is 30km h^-1.whatis the average speed for Abdul's trip (please show every step)

46.

Abdul while driving to school, commutes the average speed For his trip to be 20km h-1 . On his return trip along the same route,there is less traffic and the average speed is 30km h-1 .whatis the average speed for Abdul's trip (please show every step)

Answer»

Abdul while driving to school, commutes the average speed For his trip to be 20km h^-1 . On his return trip along the same route,there is less traffic and the average speed is 30km h^-1.whatis the average speed for Abdul's trip

(please show every step)

Discussion

47.	An engine can pump 30,000 litres of water to a vertical height of 45 metres in 10 minutes. Calculate the power. Take g= 9.8 m s-1 [Density of water = 103 kg m-3 1000 liters = 1 m3]
Answer» An engine can pump 30,000 litres of water to a vertical height of 45 metres in 10 minutes. Calculate the power. Take g= 9.8 m s^-1 [Density of water = 10³ kg m^-3 1000 liters = 1 m³]

Discussion

48.	A dimensionally consistent relation for the volume V of a liquid of coefficient of viscosity η flowing per second through a tube of radius r and length l and having a pressure difference P across its end, is
Answer» A dimensionally consistent relation for the volume V of a liquid of coefficient of viscosity $η$ flowing per second through a tube of radius r and length l and having a pressure difference P across its end, is

Discussion

49.	How many joules of energy is consumed if the electric meter at home shows 400 units ?
Answer» How many joules of energy is consumed if the electric meter at home shows 400 units ?

Discussion

50.	Calculate the minimum distance in air required between the source of sound and the obstacle to hear an echo. Take speed of sound in air = 350 m s−1.
Answer» Calculate the minimum distance in air required between the source of sound and the obstacle to hear an echo. Take speed of sound in air = 350 m $s^{- 1}$ .

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following layers of the atmosphere will have the lowest pressure?

A uniform metal rod of length L and mass M is rotating with an angular speed ω about an axis passing through one of the ends and perpendicular to the rod. If the temperature increases by t∘C, then the change in its angular speed is proportional to

What is the distance covered by a car in 4 h if it is moving with a speed of 35 km/h?

An object of mass 100kg is accelerated uniformly from a velocity of 5m/s to 8m/s in 6s.Calculate the initial and final momentum of the object.Also,find the magnitude of the force exerted on the object.

A uniform rod of length l=100 cm is bent at its mid-point to make 90∘ angle. The distance of the centre of mass from the centre of the rod is

The word magnet has been derived from ___.

Bigger the least count of an instrument, ___ the accuracy of the measurement made by the instrument.

Two identical geostationary satellites are moving with equal speed in the same orbit but their sense of rotation brings them on a collision course. The debris will (1) Fall down (2) Move up (3) Move east to west in same orbit (4) Move from West to East in same orbit

A combination of wood and iron, just floats in the water at room temperature. Explain what you will observe when the water is heated.

A student, while performing an experiment using a screw gauge, observes that the screw moves 3 mm on the pitch scale when 6 complete rotations of the head scale are given. What is the pitch of the screw gauge?

Choose the correct statement about seismic waves:

A-What is reverberation how can it be reduced B-A sound wave travels at a speed of 399 metre per second if the wavelength is 1.5 m what is the frequency of the wave will it be audible C-Why are the ceilings of concert halls curved

Question 4 Define average power.

Why does dead body float on water ?

Question 7 (b) A 8000 kg engine pulls a train of 5 wagons, each of 2000 kg, along a horizontal track. If the engine exerts a force of 40000 N and the track offers a friction force of 5000 N, then calculate: (b) the acceleration of the train.

Name the physical quantity which gives us an idea of how slow or fast a body is moving.

Who suggested the distribution of electrons into different shells? How are the electrons distributed across these shells? [5 MARKS]

What do you mean by the frequency of a sound wave? [1 MARK]

(1).I need all three Newton's law with the correct statement. (2).Inertia and mass. (3).All the formula's of force and laws of motion chapter. (4). Mathematical formulation of second law of motion. (5). Conservation of momentum.

A bullet of mass 50g moving with an initial velocity 100m/s strikes a wooden block and comes to rest after penetrating a distance of 2 cm. Calculate the retardation caused by the wooden block

Find the difference between the heights of two towers A and B, if the height of tower A and tower B is 112 m and 17575 cm tall respectively.

If two masses m1 and m2 collide with each other. The velocities before collision are u1 and u2 respectively. After the collision, the velocities are v1and v2 respectively. What is the final momentum after the collision?

A person travels a distance of 5 m towards East, then 4 m towards North and then 2 m towards West. (i) Calculate the total distance travelled. (ii) Calculate the net displacement. [2 MARKS]

Which of the following could not be a unit of speed ? (a) km/h (b) s/m (c) m/s (d) mmS−1

What is the difference between inertia and momentum?

What is a vacuum? Explain why sound cannot travel through a vacuum.

The velocity of a car is 18 m/s. Express this velocity in km/h.

The pitch of a scrw gauge is 0.5 mm and the head scale is divided in 100 parts. What is the least count of screw gauge ?

A car is moving in a straight line with speed 18 km/hr. It is stopped in 5s by applying the brakes. Find (i) the retardation and (ii) speed of the car after 2s of applying the brakes.

What will happen to value of g if we go inside the earth and what will happen to the value of g if we go at the center of the earth .why explain brefly?

A car of mass 1200 km moving at a speed of 36 km / hr was brought to rest in 20 m by applying brakes. What is the magnitude of constant braking force acting on the car?

From a rifle Mass 4 kg, a bullet of mass 50g is fired with an initial velocity of 35m/s. Calculate the initial recoil velocity of the rifle

Why is uniform circular motion known as an accelerated motion?

A bus decreases its speed from 80 km/h to 60 km/h in 5 seconds. Find the acceleration of the bus.

How much of the energy in burning coal reaches the consumer as electricity?

Why is sea water denser than normal water?

Draw graphs to show the dependence of (i) acceleration on force for a constant mass, and (ii) force on mass for a constant acceleration.

Mn and Mp represent mass of neutron and proton respectively. If an element having nuclear mass M has N-neutron and Z-proton, then the correct relation will be

What will be the transfer of momentum when a dumb bell of mass 15 kg falls from a height of 50cm and does not rebound? ( Take its downward acceleration to be 10 ms-2)

What is acceleration ? Write it's unit

In a football and stone of same size, the inertia of

For a body of mass 5kg, initially at rest, the force - time graph is as shown, choose the correct statement.

Choose the approximate mass of the earth from the following?

The facilities that use burnt waste in order to generate electricity are better known as __________

Abdul while driving to school, commutes the average speed For his trip to be 20km h-1 . On his return trip along the same route,there is less traffic and the average speed is 30km h-1 .whatis the average speed for Abdul's trip (please show every step)

An engine can pump 30,000 litres of water to a vertical height of 45 metres in 10 minutes. Calculate the power. Take g= 9.8 m s-1 [Density of water = 103 kg m-3 1000 liters = 1 m3]

A dimensionally consistent relation for the volume V of a liquid of coefficient of viscosity η flowing per second through a tube of radius r and length l and having a pressure difference P across its end, is

How many joules of energy is consumed if the electric meter at home shows 400 units ?

Calculate the minimum distance in air required between the source of sound and the obstacle to hear an echo. Take speed of sound in air = 350 m s−1.