13232 + Interview Questions in Physics

1.	A body moves from rest with a uniform acceleration and travels 270 m in 3 s.Find the velocity of the body at 10 s after the start.
Answer» A body moves from rest with a uniform acceleration and travels 270 m in 3 s.Find the velocity of the body at 10 s after the start.

Discussion

2.	Pick the derived physical quantity(s).
Answer» Pick the derived physical quantity(s).

Discussion

3.	After crossing Sound Barrier will a person be able to hear any sound both from inside and outside
Answer» After crossing Sound Barrier will a person be able to hear any sound both from inside and outside

Discussion

4.	Sarita lives on the 3rd floor of the building at a height of 15 m she carries a School Bag weighing 5.2 kg from the ground floor to her house. Find the amount of work done by her. Identify the force against which she has done the work. Take g=10m/s2.
Answer» Sarita lives on the 3rd floor of the building at a height of 15 m she carries a School Bag weighing 5.2 kg from the ground floor to her house. Find the amount of work done by her. Identify the force against which she has done the work. Take $g = 10 m / s^{2}$ .

Discussion

5.	Reynolds number (Re) is___
Answer» Reynolds number (Re) is___

Discussion

6.	If the first law of newton says that for producing motion you need an external unbalanced force to be applied or in simple words we can't move by ourselves so how are we able to move our hands?
Answer» If the first law of newton says that for producing motion you need an external unbalanced force to be applied or in simple words we can't move by ourselves so how are we able to move our hands?

Discussion

7.	Derive an equation v=u+at .
Answer» Derive an equation $v = u + a t$ .

Discussion

8.	If two forces as shown in above figure are 6 N and 4 N are acting opposite. The mass of the object is 2 kg. What is the acceleration of the mass?
Answer» If two forces as shown in above figure are 6 N and 4 N are acting opposite. The mass of the object is 2 kg. What is the acceleration of the mass?

8.

If two forces as shown in above figure are 6 N and 4 N are acting opposite. The mass of the object is 2 kg. What is the acceleration of the mass?

Answer»

If two forces as shown in above figure are 6 N and 4 N are acting opposite. The mass of the object is 2 kg. What is the acceleration of the mass?

Discussion

9.	What is the action and reaction in the cases of pulling a drawer, pushing a door in forward direction ?
Answer» What is the action and reaction in the cases of pulling a drawer, pushing a door in forward direction ?

Discussion

10.	The separation between two masses is reduced to half. How is the magnitude of gravitational force between them affected?
Answer» The separation between two masses is reduced to half. How is the magnitude of gravitational force between them affected?

Discussion

11.	If F is the force between two bodies of masses m1 and m2 at a certain separation, then what is the force between √5 m1 and √3 m2 at the same separation?
Answer» If $F$ is the force between two bodies of masses $m_{1}$ and $m_{2}$ at a certain separation, then what is the force between $\sqrt{5} m_{1}$ and $\sqrt{3} m_{2}$ at the same separation?

Discussion

12.	What is the law of conservation of energy?
Answer» What is the law of conservation of energy?

Discussion

13.	Block R has mass 3 m and velocity 5 v. Another body S has mass 5 m and velocity 1.5 v. What is the ratio between momentum of R and S?
Answer» Block R has mass 3 m and velocity 5 v. Another body S has mass 5 m and velocity 1.5 v. What is the ratio between momentum of R and S?

Discussion

14.	What is the mechanical advantage of a single movable pulley?
Answer» What is the mechanical advantage of a single movable pulley?

14.

What is the mechanical advantage of a single movable pulley?

Answer»

What is the mechanical advantage of a single movable pulley?

Discussion

15.	Which of the following is true about displacement?
Answer» Which of the following is true about displacement?

Discussion

16.	Differentiate between the producers and consumers.
Answer» Differentiate between the producers and consumers.

Discussion

17.	An observer moves towards a stationary plane mirror at a speed of 4m/s. The speed of image with respect to mirror is __________.
Answer» An observer moves towards a stationary plane mirror at a speed of 4m/s. The speed of image with respect to mirror is __________.

Discussion

18.	An object is 11 km below sea level. A ship sends down a sonar signal to confirm how deep the object is. After how long can it expect to get the echo? (Take the speed of sound in sea water as 1520 ms−1.)
Answer» An object is $11 k m$ below sea level. A ship sends down a sonar signal to confirm how deep the object is. After how long can it expect to get the echo? (Take the speed of sound in sea water as $1520 m s^{- 1}$ .)

Discussion

19.	Sarah packed 12 boxes of sweets each weighing 625 grams. What is the total weight of sweets Sarah packed?
Answer» Sarah packed 12 boxes of sweets each weighing 625 grams. What is the total weight of sweets Sarah packed?

Discussion

20.	The accumulation of non-biodegradable pesticides in the food chain in increasing amounts at each higher trophic level is known as:
Answer» The accumulation of non-biodegradable pesticides in the food chain in increasing amounts at each higher trophic level is known as:

Discussion

21.	What is a submarine? How can it be made to dive into the water and come to the surface of the water?
Answer» What is a submarine? How can it be made to dive into the water and come to the surface of the water?

Discussion

22.	A force of 12 N is acting on a body and the same force 12 N is acting on the same body but in a different direction. If the body moves with a displacement of ′d′ metres, then what is the work done?
Answer» A force of 12 N is acting on a body and the same force 12 N is acting on the same body but in a different direction. If the body moves with a displacement of $^{'} d^{'}$ metres, then what is the work done?

Discussion

23.	Work done on the gas, W, in an irreversible expansion is given by W=−Pext×dV, where Pext is the external pressure and dV is the change in volume of the gas (i.e., Vfinal−Vinitial). What is the value of work done on 1 mole of an ideal gas when it expands into vaccum?
Answer» Work done on the gas, W, in an irreversible expansion is given by $W = - P_{e x t} \times d V$ , where $P_{e x t}$ is the external pressure and dV is the change in volume of the gas (i.e., $V_{f i n a l} - V_{i n i t i a l}$ ). What is the value of work done on 1 mole of an ideal gas when it expands into vaccum?

Discussion

24.	A 2 cm high object is placed at a distance of 20 cm from a concave mirror. A real image is formed 40 cm from the mirror. Calculate the focal length of the mirror and the size of the image. [3 MARKS]
Answer» A 2 cm high object is placed at a distance of 20 cm from a concave mirror. A real image is formed 40 cm from the mirror. Calculate the focal length of the mirror and the size of the image. [3 MARKS]

Discussion

25.	Why are road accidents at high speeds very much worse than accidents at low speeds?
Answer» Why are road accidents at high speeds very much worse than accidents at low speeds?

Discussion

26.	Four massless springs whose force constants are 2k, 2k, k and 2k respectively are attached to a mass M kept on a frictionless plane (as shown in figure). If the mass M is displaced in the horizontal direction, then the frequency of the system is
Answer» Four massless springs whose force constants are 2k, 2k, k and 2k respectively are attached to a mass M kept on a frictionless plane (as shown in figure). If the mass M is displaced in the horizontal direction, then the frequency of the system is

26.

Four massless springs whose force constants are 2k, 2k, k and 2k respectively are attached to a mass M kept on a frictionless plane (as shown in figure). If the mass M is displaced in the horizontal direction, then the frequency of the system is

Answer» Four massless springs whose force constants are 2k, 2k, k and 2k respectively are attached to a mass M kept on a frictionless plane (as shown in figure). If the mass M is displaced in the horizontal direction, then the frequency of the system is

Discussion

27.	All the objects in the universe attract each other. (a) What is this force of attraction called? (b) Name any two factors on which this force of attraction depends.
Answer» All the objects in the universe attract each other. (a) What is this force of attraction called? (b) Name any two factors on which this force of attraction depends.

Discussion

28.	A train takes 2 h to reach station B from station A,and then 3 h to return from station B to station A.The distance between the two stations is 200 km.Find:(i)the average speed,(ii) the average velocity of the train.
Answer» A train takes 2 h to reach station B from station A,and then 3 h to return from station B to station A.The distance between the two stations is 200 km.Find:(i)the average speed,(ii) the average velocity of the train.

Discussion

29.	R.D. Of Mercury is 13.6. Three density of water is 10³kg/me. What is three density of Mercury in SI unit?
Answer» R.D. Of Mercury is 13.6. Three density of water is 10³kg/me. What is three density of Mercury in SI unit?

Discussion

30.	What is the expression for Velocity Ratio (V.R), if the velocity of effort and the velocity of the load are denoted as V1 and V2 respectively?
Answer» What is the expression for Velocity Ratio (V.R), if the velocity of effort and the velocity of the load are denoted as V1 and V2 respectively?

Discussion

31.	When is the pressure on the ground more-when a man is walking or when a man is standing? Explain.
Answer» When is the pressure on the ground more-when a man is walking or when a man is standing? Explain.

Discussion

32.	What force must the brakes apply to a truck of mass 2800 kg moving with a speed of 3 metre per second to bring it to rest in 8 seconds
Answer» What force must the brakes apply to a truck of mass 2800 kg moving with a speed of 3 metre per second to bring it to rest in 8 seconds

Discussion

33.	Which of these cannot be explained best by Newton's third law of motion?
Answer» Which of these cannot be explained best by Newton's third law of motion?

Discussion

34.	A body of mass 10 kg is moving on a circular track of radius 15 m. What is work done by the body to complete one revolution? (Take g=10 ms−2)
Answer» A body of mass $10 k g$ is moving on a circular track of radius $15 m$ . What is work done by the body to complete one revolution? (Take $g = 10 m s^{- 2}$ )

Discussion

35.	Imagine yourself trapped in a dark room which has three enemies and one friend. How will you recognize your friend on the basis of his voice?
Answer» Imagine yourself trapped in a dark room which has three enemies and one friend. How will you recognize your friend on the basis of his voice?

Discussion

36.	Rubbing of two bodies is used___.
Answer» Rubbing of two bodies is used___.

Discussion

37.	Is there any difference between force of gravity and force of gravitation ?
Answer» Is there any difference between force of gravity and force of gravitation ?

Discussion

38.	If a ball is thrown vertically upwards with a velocity of 40ms, assuming (g=10ms2) then what will be the velocity of the ball after two seconds?
Answer» If a ball is thrown vertically upwards with a velocity of 40 $\frac{m}{s}$ , assuming $(g = 10 \frac{m}{s^{2}})$ then what will be the velocity of the ball after two seconds?

Discussion

39.	Artificial satellites are classified based on their revolving orbits as:
Answer» Artificial satellites are classified based on their revolving orbits as:

Discussion

40.	State the two kinds of cell. Give one example of each.
Answer» State the two kinds of cell. Give one example of each.

Discussion

41.	Why does a person fall backward when he jumps to get into a moving train??
Answer» Why does a person fall backward when he jumps to get into a moving train??

Discussion

42.	How does the focal length of the convex lens increase when we put them in water? How is focal length related to refractive index?
Answer» How does the focal length of the convex lens increase when we put them in water? How is focal length related to refractive index?

Discussion

43.	The tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called__.
Answer» The tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called__.

Discussion

44.	Why is it difficult for a fireman to hold a box which ejects a large amount of water at a high velocity?
Answer» Why is it difficult for a fireman to hold a box which ejects a large amount of water at a high velocity?

Discussion

45.	write the law of conservation of momentum
Answer» write the law of conservation of momentum

Discussion

46.	Is accleraaccel is zero in uniform velocity? If yes so why?
Answer» Is accleraaccel is zero in uniform velocity? If yes so why?

Discussion

47.	A train accelerates from 36km/h to 54km/h in 10 sec. Find a) Acceleration b) The distance travelled by the train.
Answer» A train accelerates from 36km/h to 54km/h in 10 sec. Find a) Acceleration b) The distance travelled by the train.

47.

A train accelerates from 36km/h to 54km/h in 10 sec. Find a) Acceleration b) The distance travelled by the train.

Answer»

A train accelerates from 36km/h to 54km/h in 10 sec. Find

a) Acceleration

b) The distance travelled by the train.

Discussion

48.	A increase in length of a rope by pulling it from either side is an example of?
Answer» A increase in length of a rope by pulling it from either side is an example of?

Discussion

49.	Capitalist economy provides complete economic freedom to
Answer» Capitalist economy provides complete economic freedom to

Discussion

50.	After testing the eyes of a child, the optician has prescribed the following lenses for his spectacles: Left eye: = +2.00 D and Right eye = +2.25 D. The child is suffering from the defect of vision called:
Answer» After testing the eyes of a child, the optician has prescribed the following lenses for his spectacles: Left eye: = +2.00 D and Right eye = +2.25 D. The child is suffering from the defect of vision called:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A body moves from rest with a uniform acceleration and travels 270 m in 3 s.Find the velocity of the body at 10 s after the start.

Pick the derived physical quantity(s).

After crossing Sound Barrier will a person be able to hear any sound both from inside and outside

Sarita lives on the 3rd floor of the building at a height of 15 m she carries a School Bag weighing 5.2 kg from the ground floor to her house. Find the amount of work done by her. Identify the force against which she has done the work. Take g=10m/s2.

Reynolds number (Re) is___

If the first law of newton says that for producing motion you need an external unbalanced force to be applied or in simple words we can't move by ourselves so how are we able to move our hands?

Derive an equation v=u+at .

If two forces as shown in above figure are 6 N and 4 N are acting opposite. The mass of the object is 2 kg. What is the acceleration of the mass?

What is the action and reaction in the cases of pulling a drawer, pushing a door in forward direction ?

The separation between two masses is reduced to half. How is the magnitude of gravitational force between them affected?

If F is the force between two bodies of masses m1 and m2 at a certain separation, then what is the force between √5 m1 and √3 m2 at the same separation?

What is the law of conservation of energy?

Block R has mass 3 m and velocity 5 v. Another body S has mass 5 m and velocity 1.5 v. What is the ratio between momentum of R and S?

What is the mechanical advantage of a single movable pulley?

Which of the following is true about displacement?

Differentiate between the producers and consumers.

An observer moves towards a stationary plane mirror at a speed of 4m/s. The speed of image with respect to mirror is __________.

An object is 11 km below sea level. A ship sends down a sonar signal to confirm how deep the object is. After how long can it expect to get the echo? (Take the speed of sound in sea water as 1520 ms−1.)

Sarah packed 12 boxes of sweets each weighing 625 grams. What is the total weight of sweets Sarah packed?

The accumulation of non-biodegradable pesticides in the food chain in increasing amounts at each higher trophic level is known as:

What is a submarine? How can it be made to dive into the water and come to the surface of the water?

A force of 12 N is acting on a body and the same force 12 N is acting on the same body but in a different direction. If the body moves with a displacement of ′d′ metres, then what is the work done?

Work done on the gas, W, in an irreversible expansion is given by W=−Pext×dV, where Pext is the external pressure and dV is the change in volume of the gas (i.e., Vfinal−Vinitial). What is the value of work done on 1 mole of an ideal gas when it expands into vaccum?

A 2 cm high object is placed at a distance of 20 cm from a concave mirror. A real image is formed 40 cm from the mirror. Calculate the focal length of the mirror and the size of the image. [3 MARKS]

Why are road accidents at high speeds very much worse than accidents at low speeds?

Four massless springs whose force constants are 2k, 2k, k and 2k respectively are attached to a mass M kept on a frictionless plane (as shown in figure). If the mass M is displaced in the horizontal direction, then the frequency of the system is

All the objects in the universe attract each other. (a) What is this force of attraction called? (b) Name any two factors on which this force of attraction depends.

A train takes 2 h to reach station B from station A,and then 3 h to return from station B to station A.The distance between the two stations is 200 km.Find:(i)the average speed,(ii) the average velocity of the train.

R.D. Of Mercury is 13.6. Three density of water is 10³kg/me. What is three density of Mercury in SI unit?

What is the expression for Velocity Ratio (V.R), if the velocity of effort and the velocity of the load are denoted as V1 and V2 respectively?

When is the pressure on the ground more-when a man is walking or when a man is standing? Explain.

What force must the brakes apply to a truck of mass 2800 kg moving with a speed of 3 metre per second to bring it to rest in 8 seconds

Which of these cannot be explained best by Newton's third law of motion?

A body of mass 10 kg is moving on a circular track of radius 15 m. What is work done by the body to complete one revolution? (Take g=10 ms−2)

Imagine yourself trapped in a dark room which has three enemies and one friend. How will you recognize your friend on the basis of his voice?

Rubbing of two bodies is used___.

Is there any difference between force of gravity and force of gravitation ?

If a ball is thrown vertically upwards with a velocity of 40ms, assuming (g=10ms2) then what will be the velocity of the ball after two seconds?

Artificial satellites are classified based on their revolving orbits as:

State the two kinds of cell. Give one example of each.

Why does a person fall backward when he jumps to get into a moving train??

How does the focal length of the convex lens increase when we put them in water? How is focal length related to refractive index?

The tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called__.

Why is it difficult for a fireman to hold a box which ejects a large amount of water at a high velocity?

write the law of conservation of momentum

Is accleraaccel is zero in uniform velocity? If yes so why?

A train accelerates from 36km/h to 54km/h in 10 sec. Find a) Acceleration b) The distance travelled by the train.

A increase in length of a rope by pulling it from either side is an example of?

Capitalist economy provides complete economic freedom to

After testing the eyes of a child, the optician has prescribed the following lenses for his spectacles: Left eye: = +2.00 D and Right eye = +2.25 D. The child is suffering from the defect of vision called: