13232 + Interview Questions in Physics

1.	Consider a circular loop of wire lying in the plane of the table. Let the current passing through the loop be clockwise. Apply the right hand rule to find out the direction of magnetic field inside and outside the loop? [2 MARKS]
Answer» Consider a circular loop of wire lying in the plane of the table. Let the current passing through the loop be clockwise. Apply the right hand rule to find out the direction of magnetic field inside and outside the loop? [2 MARKS]

Discussion

2.	What is energy?
Answer» What is energy?

Discussion

3.	Give one example of motion where an object does not change its speed but it changes the direction of motion continuesly?
Answer» Give one example of motion where an object does not change its speed but it changes the direction of motion continuesly?

Discussion

4.	Does the frequency of sound wave changes with the medium
Answer» Does the frequency of sound wave changes with the medium

Discussion

5.	Name the type of waves produced when a tuning fork is struck in the air.
Answer» Name the type of waves produced when a tuning fork is struck in the air.

Discussion

6.	What would be the relation between the velocity of the gun and bullet, If the mass of gun is less than the mass of bullet?
Answer» What would be the relation between the velocity of the gun and bullet, If the mass of gun is less than the mass of bullet?

Discussion

7.	A force of 5N gives a mass M1 an acceleration of 8.0m/s2 and a mass M2 an acceleration of 24m/s2. What acceleration would it give if both the masses are tied together?
Answer» A force of 5N gives a mass M1 an acceleration of 8.0m/s² and a mass M₂an acceleration of 24m/s². What acceleration would it give if both the masses are tied together?

Discussion

8.	How is the optical density of a substance is different from its mass density?
Answer» How is the optical density of a substance is different from its mass density?

Discussion

9.	The length of a stretched string is doubled and tension is increased 100 times. What will happen to the pitch of the sound produced by the string?
Answer» The length of a stretched string is doubled and tension is increased 100 times. What will happen to the pitch of the sound produced by the string?

Discussion

10.	A stone is dropped from a rising balloon at a height of 76 m above the ground and it reaches the ground in 6s. What was the velocity of the balloon when the stone was dropped? Take g=10 m/ s2.
Answer» A stone is dropped from a rising balloon at a height of 76 m above the ground and it reaches the ground in 6s. What was the velocity of the balloon when the stone was dropped? Take g=10 m/ $s^{2}$ .

10.

A stone is dropped from a rising balloon at a height of 76 m above the ground and it reaches the ground in 6s. What was the velocity of the balloon when the stone was dropped? Take g=10 m/ s2.

Answer»

A stone is dropped from a rising balloon at a height of 76 m above the

ground and it reaches the ground in 6s. What was the velocity of the

balloon when the stone was dropped? Take g=10 m/ $s^{2}$ .

Discussion

11.	Two bodies A and B of same mass are moving with velocities v and 2v respectively. Compare their (i) inertia, (ii) momentum.
Answer» Two bodies A and B of same mass are moving with velocities v and 2v respectively. Compare their (i) inertia, (ii) momentum.

Discussion

12.	Question 22 An automobile engine propels a 1000 kg car (A) along a leveled road at a speed of 36 kmph. Find the power if the opposing frictional force is 100 N. Now, suppose after travelling a distance of 200 m, this car collides with another stationary car (B) of same mass and comes to rest. Let its engine also stop at the same time. Now car (B) starts moving on the same level road without getting its engine started. Find the speed of the car (B) just after the collision.
Answer» Question 22 An automobile engine propels a 1000 kg car (A) along a leveled road at a speed of 36 kmph. Find the power if the opposing frictional force is 100 N. Now, suppose after travelling a distance of 200 m, this car collides with another stationary car (B) of same mass and comes to rest. Let its engine also stop at the same time. Now car (B) starts moving on the same level road without getting its engine started. Find the speed of the car (B) just after the collision.

Discussion

13.	Trace the correct path of the light ray after passing through the concave lens:
Answer» Trace the correct path of the light ray after passing through the concave lens:

Discussion

14.	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, use Kepler's law of harmonies to predict the time for Mars to orbit the sun.
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, use Kepler's law of harmonies to predict the time for Mars to orbit the sun.

Discussion

15.	An ice berg of density 900Kgm3 is floating in water of density 1000Kgm3. The percentage of volume of ice-cube outside the water is
Answer» An ice berg of density $900 \frac{K g}{m^{3}}$ is floating in water of density $1000 \frac{K g}{m^{3}}$ . The percentage of volume of ice-cube outside the water is

Discussion

16.	A body floats or sinks due to difference in their __.
Answer» A body floats or sinks due to difference in their __.

Discussion

17.	The magnetic field of a bar magnet spreads ___.
Answer» The magnetic field of a bar magnet spreads ___.

Discussion

18.	In Fleming's left-hand rule, What does the thumb, forefinger and middle finger denote?
Answer» In Fleming's left-hand rule, What does the thumb, forefinger and middle finger denote?

Discussion

19.	The current in a circuit is doubled, keeping other parameters constant. The heat generated in the circuit will be _________ of its initial value.
Answer» The current in a circuit is doubled, keeping other parameters constant. The heat generated in the circuit will be _________ of its initial value.

Discussion

20.	A string of length 1.5 m is tied to a stone of mass of 0.2 kg and is made to revolve at a speed of 1.2 m/s. The centripetal force experienced by the stone is.
Answer» A string of length 1.5 m is tied to a stone of mass of 0.2 kg and is made to revolve at a speed of 1.2 m/s. The centripetal force experienced by the stone is.

Discussion

21.	What will change if a rock is brought from the surface of the Moon to Earth... its mass or its weight or both
Answer» What will change if a rock is brought from the surface of the Moon to Earth... its mass or its weight or both

Discussion

22.	Two spheres of masses m and M are situated in air and the gravitational force between them is F. The soace around the masses are now filled with a liquid of specific gravity 3. The gravitational force will now be: F/3 F/9 3F F
Answer» Two spheres of masses m and M are situated in air and the gravitational force between them is F. The soace around the masses are now filled with a liquid of specific gravity 3. The gravitational force will now be: F/3 F/9 3F F

22.

Two spheres of masses m and M are situated in air and the gravitational force between them is F. The soace around the masses are now filled with a liquid of specific gravity 3. The gravitational force will now be: F/3 F/9 3F F

Answer»

Two spheres of masses m and M are situated in air and the gravitational force between them is F. The soace around the masses are now filled with a liquid of specific gravity 3. The gravitational force will now be:

F/3

F/9

3F

F

Discussion

23.	A container truck goes from Mumbai to Bangalore with an average speed of 50 kmhr−1. The journey takes 20 hours. It returns from Bangalore to Mumbai on the same road with an average speed of 40 kmhr−1. What was the average speed of the container during the roundtrip?
Answer» A container truck goes from Mumbai to Bangalore with an average speed of $50 k m h r^{- 1}$ . The journey takes $20 h o u r s$ . It returns from Bangalore to Mumbai on the same road with an average speed of $40 k m h r^{- 1}$ . What was the average speed of the container during the roundtrip?

Discussion

24.	If the K.E. of a body is increased by 300%, its momentum will increase by
Answer» If the K.E. of a body is increased by 300%, its momentum will increase by

24.

If the K.E. of a body is increased by 300%, its momentum will increase by

Answer»

If the K.E. of a body is increased by 300%, its momentum will increase by

Discussion

25.	A bullet loses 120 of its velocity in passing through a plank. The least number of planks required to stop the bullet is
Answer» A bullet loses $\frac{1}{20}$ of its velocity in passing through a plank. The least number of planks required to stop the bullet is

Discussion

26.	In case of negative work, the angle between the force and displacement is : (a) 0∘ (b) 45∘ (c) 90∘ (d) 180∘
Answer» In case of negative work, the angle between the force and displacement is : (a) $0^{\circ}$ (b) $45^{\circ}$ (c) $90^{\circ}$ (d) $180^{\circ}$

26.

In case of negative work, the angle between the force and displacement is : (a) 0∘ (b) 45∘ (c) 90∘ (d) 180∘

Answer»

In case of negative work, the angle between the force and displacement is :

(a) $0^{\circ}$

(b) $45^{\circ}$

(c) $90^{\circ}$

(d) $180^{\circ}$

Discussion

27.	A ribbon of length 20.75 m is cut into 5 equal pieces. What is the length of each ribbon piece?
Answer» A ribbon of length $20.75 m$ is cut into 5 equal pieces. What is the length of each ribbon piece?

Discussion

28.	Acceleration time graph of particle moving in straight line is given. If initial velocity of particle is 2m/s. Its velocity at 4th sec is
Answer» Acceleration time graph of particle moving in straight line is given. If initial velocity of particle is 2m/s. Its velocity at $4^{t h}$ sec is

Discussion

29.	What is the physical significance of refractive index?
Answer» What is the physical significance of refractive index?

Discussion

30.	By which characteristic of sound we can identify our friend's voice on telephone? __
Answer» By which characteristic of sound we can identify our friend's voice on telephone? __

Discussion

31.	A block A of mass 7 kg is placed on a frictionless table. A thread tied to it passes over a frictionless pulley and carries a body B of mass 3 kg at the other end. The acceleration of the system is (given g =10ms−2)
Answer» A block A of mass 7 kg is placed on a frictionless table. A thread tied to it passes over a frictionless pulley and carries a body B of mass 3 kg at the other end. The acceleration of the system is (given g $= 10 m s^{- 2}$ )

Discussion

32.	A fridge rated 1000 W and a television rated 500 W is used in a house for 8 hours daily for 30 days. What will be the cost of operating them if the unit cost of electricity (in kWhr) is 5 rupees?
Answer» A fridge rated $1000 W$ and a television rated $500 W$ is used in a house for 8 hours daily for 30 days. What will be the cost of operating them if the unit cost of electricity (in kWhr) is $5 r u p e e s$ ?

Discussion

33.	A shell of mass 10 kg is fired from a gun of mass 500 kg. The gun recoils with a velocity of 5 m/s. Find the muzzle velocity of the shell.
Answer» A shell of mass 10 kg is fired from a gun of mass 500 kg. The gun recoils with a velocity of 5 m/s. Find the muzzle velocity of the shell.

Discussion

34.	A toy car is powered by compressed air. When the car is fully pumped up and released, it accelerates at 2m/s2 for 3 seconds. As soon as the air is exhausted the car begins to slow down. It travels a combined total of 27 meters before coming to rest. What is its rate of acceleration when stopping and what is the total time of the motion?
Answer» A toy car is powered by compressed air. When the car is fully pumped up and released, it accelerates at $2 m / s^{2}$ for 3 seconds. As soon as the air is exhausted the car begins to slow down. It travels a combined total of 27 meters before coming to rest. What is its rate of acceleration when stopping and what is the total time of the motion?

Discussion

35.	area under distance - time graph gives
Answer» area under distance - time graph gives

Discussion

36.	If the pressure of a liquid column at its bottom is 1000 Pa and height of the liquid is 20 cm, the density of the liquid is (keeping in mind the gravitational pull of earth)
Answer» If the pressure of a liquid column at its bottom is 1000 Pa and height of the liquid is 20 cm, the density of the liquid is (keeping in mind the gravitational pull of earth)

Discussion

37.	A train of length 50mis moving with a constant speed of 10m/s. calculate the time taken by the train to cross the electric pole and a bridge of Length 250m.
Answer» A train of length 50mis moving with a constant speed of 10m/s. calculate the time taken by the train to cross the electric pole and a bridge of Length 250m.

Discussion

38.	What name is given to the persistence of sound in a big hall or auditorium ?
Answer» What name is given to the persistence of sound in a big hall or auditorium ?

Discussion

39.	Question5.If an elephant was chasing you, its enormous mass would be most threatening. But if you moved in a zigzag path, its big mass would become your advantage. Why?
Answer» Question5.If an elephant was chasing you, its enormous mass would be most threatening. But if you moved in a zigzag path, its big mass would become your advantage. Why?

Discussion

40.	Why building have wide foundation
Answer» Why building have wide foundation

Discussion

41.	Is it necessary for attraction of two objects e.g. a ball and earth
Answer» Is it necessary for attraction of two objects e.g. a ball and earth

Discussion

42.	Three blocks of mass M1, M2 & M3 are connected by massless strings as shown on a frictionless table. Where T1 is the tension in the string between block M1 and M2, T2 is the tension in the string between block M2 and M3. They're pulled with a force F=40N. If M1=10 kg, M2= 6 kg and M3 = 4 kg, then tension T2 will be:
Answer» Three blocks of mass $M_{1}$ , $M_{2}$ & $M_{3}$ are connected by massless strings as shown on a frictionless table. Where $T_{1}$ is the tension in the string between block $M_{1}$ and $M_{2}$ , $T_{2}$ is the tension in the string between block $M_{2}$ and $M_{3}$ . They're pulled with a force $F = 40 N$ . If $M_{1}$ =10 kg, $M_{2}$ = 6 kg and $M_{3}$ = 4 kg, then tension $T_{2}$ will be:

Discussion

43.	How much exactly gravity on earth
Answer» How much exactly gravity on earth

Discussion

44.	What is mean by mechanical wave
Answer» What is mean by mechanical wave

Discussion

45.	The mass of large heavenly bodies is measured in terms of ___, one of which is equal to the mass of the sun.
Answer» The mass of large heavenly bodies is measured in terms of ___, one of which is equal to the mass of the sun.

Discussion

46.	Sir/Mam following is my question : A body is moving along a tough level road with a speed of 15m/s among a given direction. Does any force is required to maintain this speed ? Why ? Pls help me solve this question. Thnx
Answer» Sir/Mam following is my question : A body is moving along a tough level road with a speed of 15m/s among a given direction. Does any force is required to maintain this speed ? Why ? Pls help me solve this question. Thnx

46.

Sir/Mam following is my question : A body is moving along a tough level road with a speed of 15m/s among a given direction. Does any force is required to maintain this speed ? Why ? Pls help me solve this question. Thnx

Answer»

Sir/Mam following is my question :

A body is moving along a tough level road with a speed of 15m/s among a given direction. Does any force is required to maintain this speed ? Why ?

Pls help me solve this question.

Thnx

Discussion

47.	A loud sound can travel longer distance because it:
Answer» A loud sound can travel longer distance because it:

Discussion

48.	A car accelerates from rest to 100 ms in 10 seconds. If mass of the car is 50 kg then power developed by the engine is:
Answer» A car accelerates from rest to 100 $\frac{m}{s}$ in 10 seconds. If mass of the car is 50 kg then power developed by the engine is:

Discussion

49.	A body experiences an upthrust F1 in river water and F2 in sea water when dipped up to the same level. Which is more F1 or F2 ? Give reason.
Answer» A body experiences an upthrust $F_{1}$ in river water and $F_{2}$ in sea water when dipped up to the same level. Which is more $F_{1}$ or $F_{2}$ ? Give reason.

Discussion

50.	Ram and Shyam are climbing a tree. Ram weighs 50 kg and Shyam weighs 60 kg. Power expended by Ram and Shyam to climb the tree are in the ratio 3:2. What is the ratio of times taken by Ram and Shyam to climb the tree?
Answer» Ram and Shyam are climbing a tree. Ram weighs 50 kg and Shyam weighs 60 kg. Power expended by Ram and Shyam to climb the tree are in the ratio 3:2. What is the ratio of times taken by Ram and Shyam to climb the tree?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Consider a circular loop of wire lying in the plane of the table. Let the current passing through the loop be clockwise. Apply the right hand rule to find out the direction of magnetic field inside and outside the loop? [2 MARKS]

What is energy?

Give one example of motion where an object does not change its speed but it changes the direction of motion continuesly?

Does the frequency of sound wave changes with the medium

Name the type of waves produced when a tuning fork is struck in the air.

What would be the relation between the velocity of the gun and bullet, If the mass of gun is less than the mass of bullet?

A force of 5N gives a mass M1 an acceleration of 8.0m/s2 and a mass M2 an acceleration of 24m/s2. What acceleration would it give if both the masses are tied together?

How is the optical density of a substance is different from its mass density?

The length of a stretched string is doubled and tension is increased 100 times. What will happen to the pitch of the sound produced by the string?

A stone is dropped from a rising balloon at a height of 76 m above the ground and it reaches the ground in 6s. What was the velocity of the balloon when the stone was dropped? Take g=10 m/ s2.

Two bodies A and B of same mass are moving with velocities v and 2v respectively. Compare their (i) inertia, (ii) momentum.

Trace the correct path of the light ray after passing through the concave lens:

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, use Kepler's law of harmonies to predict the time for Mars to orbit the sun.

An ice berg of density 900Kgm3 is floating in water of density 1000Kgm3. The percentage of volume of ice-cube outside the water is

A body floats or sinks due to difference in their __.

The magnetic field of a bar magnet spreads ___.

In Fleming's left-hand rule, What does the thumb, forefinger and middle finger denote?

The current in a circuit is doubled, keeping other parameters constant. The heat generated in the circuit will be _________ of its initial value.

A string of length 1.5 m is tied to a stone of mass of 0.2 kg and is made to revolve at a speed of 1.2 m/s. The centripetal force experienced by the stone is.

What will change if a rock is brought from the surface of the Moon to Earth... its mass or its weight or both

Two spheres of masses m and M are situated in air and the gravitational force between them is F. The soace around the masses are now filled with a liquid of specific gravity 3. The gravitational force will now be: F/3 F/9 3F F

A container truck goes from Mumbai to Bangalore with an average speed of 50 kmhr−1. The journey takes 20 hours. It returns from Bangalore to Mumbai on the same road with an average speed of 40 kmhr−1. What was the average speed of the container during the roundtrip?

If the K.E. of a body is increased by 300%, its momentum will increase by

A bullet loses 120 of its velocity in passing through a plank. The least number of planks required to stop the bullet is

In case of negative work, the angle between the force and displacement is : (a) 0∘ (b) 45∘ (c) 90∘ (d) 180∘

A ribbon of length 20.75 m is cut into 5 equal pieces. What is the length of each ribbon piece?

Acceleration time graph of particle moving in straight line is given. If initial velocity of particle is 2m/s. Its velocity at 4th sec is

What is the physical significance of refractive index?

By which characteristic of sound we can identify our friend's voice on telephone? __

A block A of mass 7 kg is placed on a frictionless table. A thread tied to it passes over a frictionless pulley and carries a body B of mass 3 kg at the other end. The acceleration of the system is (given g =10ms−2)

A fridge rated 1000 W and a television rated 500 W is used in a house for 8 hours daily for 30 days. What will be the cost of operating them if the unit cost of electricity (in kWhr) is 5 rupees?

A shell of mass 10 kg is fired from a gun of mass 500 kg. The gun recoils with a velocity of 5 m/s. Find the muzzle velocity of the shell.

area under distance - time graph gives

If the pressure of a liquid column at its bottom is 1000 Pa and height of the liquid is 20 cm, the density of the liquid is (keeping in mind the gravitational pull of earth)

A train of length 50mis moving with a constant speed of 10m/s. calculate the time taken by the train to cross the electric pole and a bridge of Length 250m.

What name is given to the persistence of sound in a big hall or auditorium ?

Question5.If an elephant was chasing you, its enormous mass would be most threatening. But if you moved in a zigzag path, its big mass would become your advantage. Why?

Why building have wide foundation

Is it necessary for attraction of two objects e.g. a ball and earth

How much exactly gravity on earth

What is mean by mechanical wave

The mass of large heavenly bodies is measured in terms of ___, one of which is equal to the mass of the sun.

Sir/Mam following is my question : A body is moving along a tough level road with a speed of 15m/s among a given direction. Does any force is required to maintain this speed ? Why ? Pls help me solve this question. Thnx

A loud sound can travel longer distance because it:

A car accelerates from rest to 100 ms in 10 seconds. If mass of the car is 50 kg then power developed by the engine is:

A body experiences an upthrust F1 in river water and F2 in sea water when dipped up to the same level. Which is more F1 or F2 ? Give reason.

Ram and Shyam are climbing a tree. Ram weighs 50 kg and Shyam weighs 60 kg. Power expended by Ram and Shyam to climb the tree are in the ratio 3:2. What is the ratio of times taken by Ram and Shyam to climb the tree?