13232 + Interview Questions in Physics

1.	A ball is thrown from the top of a building. As it approaches the ground which of the following decreases?
Answer» A ball is thrown from the top of a building. As it approaches the ground which of the following decreases?

Discussion

2.	Which of the following mirrors has a larger field of view?
Answer» Which of the following mirrors has a larger field of view?

Discussion

3.	A guitar produces a sound which has a frequency of 300 Hz and a wavelength of 1.3 m. Calculate the speed with which this sound travels.
Answer» A guitar produces a sound which has a frequency of $300 H z$ and a wavelength of $1.3 m$ . Calculate the speed with which this sound travels.

Discussion

4.	How does the pitch of a sound depend on frequency ?
Answer» How does the pitch of a sound depend on frequency ?

Discussion

5.	(a) What is the difference between 'distance travelled' by a body and its 'displacement' ? Explain with the help of a diagram. (b) An ant travels a distance of 8 cm from P to Q and then moves a distance of 6 cm at right angles to PQ. Find its resultant displacement.
Answer» (a) What is the difference between 'distance travelled' by a body and its 'displacement' ? Explain with the help of a diagram. (b) An ant travels a distance of 8 cm from P to Q and then moves a distance of 6 cm at right angles to PQ. Find its resultant displacement.

5.

(a) What is the difference between 'distance travelled' by a body and its 'displacement' ? Explain with the help of a diagram. (b) An ant travels a distance of 8 cm from P to Q and then moves a distance of 6 cm at right angles to PQ. Find its resultant displacement.

Answer»

(a) What is the difference between 'distance travelled' by a body and its 'displacement' ? Explain with the help of a diagram.

(b) An ant travels a distance of 8 cm from P to Q and then moves a distance of 6 cm at right angles to PQ. Find its resultant displacement.

Discussion

6.	What type of waves are illustrated by the movement of a rope whose one end is fixed to a pole and the other end is moved up and down ?
Answer» What type of waves are illustrated by the movement of a rope whose one end is fixed to a pole and the other end is moved up and down ?

Discussion

7.	Two particles are placed at some distance from each other. If, keeping the distance between them unchanged, the mass of each of the two particles is doubled, the value of gravitational force between them will become : (a) 14 times (b) 12 times (c) 4 times (d) 2 times
Answer» Two particles are placed at some distance from each other. If, keeping the distance between them unchanged, the mass of each of the two particles is doubled, the value of gravitational force between them will become : (a) $\frac{1}{4}$ times (b) $\frac{1}{2}$ times (c) 4 times (d) 2 times

Discussion

8.	A body of mass 2 kg having an initial speed of 11 m/s accelerated uniformly at 2 m/s for 5 seconds. What will be the final kinetic energy?
Answer» A body of mass 2 kg having an initial speed of 11 m/s accelerated uniformly at 2 m/s for 5 seconds. What will be the final kinetic energy?

Discussion

9.	What causes compression and rarefaction in longitudinal waves ?
Answer» What causes compression and rarefaction in longitudinal waves ?

Discussion

10.	How is the thrust related to pressure ?
Answer» How is the thrust related to pressure ?

Discussion

11.	Question 15 The non S I and S I units of some physical quantities are given in column A and column B respectively. Match the units belonging to the same physical quantity. (A)(B)(a)degree Celsius(i)kilogram(b)centimeter(ii)pascal(c)gram per centimeter cube(iii)metre(d)bar(iv)Kelvin(e)milligram(v)kilogram per metre cube
Answer» Question 15 The non S I and S I units of some physical quantities are given in column A and column B respectively. Match the units belonging to the same physical quantity. $\begin{matrix} (A) & (B) (a) d e g r e e C e l s i u s & (i) k i l o g r a m (b) c e n t i m e t e r & (i i) p a s c a l (c) g r a m p e r c e n t i m e t e r c u b e & (i i i) m e t r e (d) b a r & (i v) K e l v i n (e) m i l l i g r a m & (v) k i l o g r a m p e r m e t r e c u b e \end{matrix}$

Discussion

12.	A ball A is thrown up vertically with speed u.At the same instant another ball B is released from rest at height h.At time t speed of A relative to B is ?
Answer» A ball A is thrown up vertically with speed u.At the same instant another ball B is released from rest at height h.At time t speed of A relative to B is ?

Discussion

13.	Name the force which is responsible for change in position or state of an object
Answer» Name the force which is responsible for change in position or state of an object

Discussion

14.	A car is travelling with a speed of 36km/h. The driver applies brakes retards the car uniformly. The car is stopped in 5seconds. Find the retardation of the car and the distance travelled before it is stopped.
Answer» A car is travelling with a speed of 36km/h. The driver applies brakes retards the car uniformly. The car is stopped in 5seconds. Find the retardation of the car and the distance travelled before it is stopped.

Discussion

15.	A ball thrown vertically upwards with a speed of 19.6 m/s from the top of a tower returns to the earth in 6s. Find the height of tower. What is a=-g in this case?
Answer» A ball thrown vertically upwards with a speed of 19.6 m/s from the top of a tower returns to the earth in 6s. Find the height of tower. What is a=-g in this case?

Discussion

16.	what happens to the momentum when two objects coming from different directions with different velocites collide and go in different directions.
Answer» what happens to the momentum when two objects coming from different directions with different velocites collide and go in different directions.

Discussion

17.	Name the constituents of a cell.
Answer» Name the constituents of a cell.

Discussion

18.	Why momentum is used and for what purpose?
Answer» Why momentum is used and for what purpose?

Discussion

19.	When an object of height 1cm is kept at a distance 4cm from a concave mirror, it's erect image of height 1.5cm is formed at a distance 6cm behind the mirror. Find the focal length of the mirror.
Answer» When an object of height 1cm is kept at a distance 4cm from a concave mirror, it's erect image of height 1.5cm is formed at a distance 6cm behind the mirror. Find the focal length of the mirror.

Discussion

20.	What is upthrust ? What are the quantities that can vary upthrust? How does it account for the floating of a body? when a partially immersed body is pressed down a little, what will happen to the upthrust?
Answer» What is upthrust ? What are the quantities that can vary upthrust? How does it account for the floating of a body? when a partially immersed body is pressed down a little, what will happen to the upthrust?

Discussion

21.	When an object is moving with negative acceleratio then when force is negative does tha mean if some one goes in front of it and gets hit will he not get hit
Answer» When an object is moving with negative acceleratio then when force is negative does tha mean if some one goes in front of it and gets hit will he not get hit

Discussion

22.	Change in momentum when a car weighing 700kg changes its speed from 100m/s to 200 m/s is:
Answer» Change in momentum when a car weighing 700kg changes its speed from 100m/s to 200 m/s is:

Discussion

23.	Consider a hydraulic system with two pistons, piston1 and piston2. A force F1 is applied to piston1 of area A1 and piston2 applies a force F2 over area A2. If we double the force applied by piston1 and reduce the area of piston2 by a factor of three, then the new force applied by piston2 is
Answer» Consider a hydraulic system with two pistons, piston1 and piston2. A force $F_{1}$ is applied to piston1 of area $A_{1}$ and piston2 applies a force $F_{2}$ over area $A_{2}$ . If we double the force applied by piston1 and reduce the area of piston2 by a factor of three, then the new force applied by piston2 is

Discussion

24.	A body weighs 48 N on the surface on earth, its weight at the centre of the earth is:
Answer» A body weighs 48 N on the surface on earth, its weight at the centre of the earth is:

Discussion

25.	Discuss the law of conservation of momentum. State its unit. [3 MARKS]
Answer» Discuss the law of conservation of momentum. State its unit. [3 MARKS]

Discussion

26.	When glass of water is freezed, formation of ice starts from the top layer but melting of ice starts from bottom. Justify.
Answer» When glass of water is freezed, formation of ice starts from the top layer but melting of ice starts from bottom. Justify.

Discussion

27.	At 20o C, the minimum distance of a person from a sound reflecting surface to hear an echo is : (a) 12.2 m (b) 17.2 m (c) 15.2 m (d) 34.4 m
Answer» At $20^{o} C$ , the minimum distance of a person from a sound reflecting surface to hear an echo is : (a) 12.2 m (b) 17.2 m (c) 15.2 m (d) 34.4 m

27.

At 20o C, the minimum distance of a person from a sound reflecting surface to hear an echo is : (a) 12.2 m (b) 17.2 m (c) 15.2 m (d) 34.4 m

Answer»

At $20^{o} C$ , the minimum distance of a person from a sound reflecting surface to hear an echo is :

(a) 12.2 m

(b) 17.2 m

(c) 15.2 m

(d) 34.4 m

Discussion

28.	What is meant by the quality (or timbre) of sound ? On what factor does the quality (or timbre) of a sound depend ?
Answer» What is meant by the quality (or timbre) of sound ? On what factor does the quality (or timbre) of a sound depend ?

Discussion

29.	Four wires each of same length diameter and material are connected to each other to form a square. If the resistance of each wire is R, then the equivalent resistance across the opposite corners is:
Answer» Four wires each of same length diameter and material are connected to each other to form a square. If the resistance of each wire is R, then the equivalent resistance across the opposite corners is:

Discussion

30.	Differences between kinetic energy and potential energy?
Answer» Differences between kinetic energy and potential energy?

Discussion

31.	A vessel at rest explodes into three pieces. Two pieces having equal masses fly off perpendicular to one another with the same velocity 30 metre per second. The third piece has three times mass of each of other piece. The magnitude and direction of the velocity of the third piece will be
Answer» A vessel at rest explodes into three pieces. Two pieces having equal masses fly off perpendicular to one another with the same velocity 30 metre per second. The third piece has three times mass of each of other piece. The magnitude and direction of the velocity of the third piece will be

Discussion

32.	Value of Gravitational constant G on moon
Answer» Value of Gravitational constant G on moon

Discussion

33.	In which of the following cases the strength of the magnetic field inside an electromagnet would change?
Answer» In which of the following cases the strength of the magnetic field inside an electromagnet would change?

Discussion

34.	Two spherical balls of mass 10 kg each are placed with their centers 10 cm apart. Find the gravitational force of attraction between them. Take G=6.67×10−11 Nm2kg−2
Answer» Two spherical balls of mass 10 kg each are placed with their centers 10 cm apart. Find the gravitational force of attraction between them. Take $G = 6.67 \times 10^{- 11} N m^{2} k g^{- 2}$

Discussion

35.	Why the handle of an ordinary water handpump made longer?
Answer» Why the handle of an ordinary water handpump made longer?

Discussion

36.	Explain the third law of Kepler.
Answer» Explain the third law of Kepler.

Discussion

37.	Is P =W/t =mgh/t correct? Because W=F*s so how can W=mgh/t be the value of W?
Answer» Is P =W/t =mgh/t correct? Because W=F*s so how can W=mgh/t be the value of W?

Discussion

38.	_______ is the mass of one litre (1000 ml) of pure water at 4-degree Celsius.
Answer» _______ is the mass of one litre (1000 ml) of pure water at 4-degree Celsius.

Discussion

39.	A constant force is acting on a body, then: Mass × change in velocity = ___ × time interval.
Answer» A constant force is acting on a body, then: Mass $\times$ change in velocity = ___ $\times$ time interval.

39.

A constant force is acting on a body, then: Mass × change in velocity = ___ × time interval.

Answer»

A constant force is acting on a body, then:

Mass $\times$ change in velocity = ___ $\times$ time interval.

Discussion

40.	The mass of water displaced by a solid of mass 400 g and volume 150 cm3 is
Answer» The mass of water displaced by a solid of mass 400 g and volume 150 cm³ is

Discussion

41.	In the following graph, what is the acceleration at t =1s?
Answer» In the following graph, what is the acceleration at t =1s?

41.

In the following graph, what is the acceleration at t =1s?

Answer»

In the following graph, what is the acceleration at t =1s?

Discussion

42.	The brakes applied to a car produce a negative acceleration of 6 m/s2. If the car takes 2 seconds to stop after applying the brakes, calculate the distance it travels during this time. (Give your answer in m) __
Answer» The brakes applied to a car produce a negative acceleration of 6 $m / s^{2}$ . If the car takes 2 seconds to stop after applying the brakes, calculate the distance it travels during this time. (Give your answer in m) __

Discussion

43.	Which of the following quantity causes motion in a body?
Answer» Which of the following quantity causes motion in a body?

Discussion

44.	Which of the following is the formula for the time period of a simple pendulum?
Answer» Which of the following is the formula for the time period of a simple pendulum?

Discussion

45.	What is the speed of sound in air ?
Answer» What is the speed of sound in air ?

Discussion

46.	In the above figures, the arrows indicate the direction of force and the magnitude of the force is written above/below the arrows. Which box is experiencing a balanced force?
Answer» In the above figures, the arrows indicate the direction of force and the magnitude of the force is written above/below the arrows. Which box is experiencing a balanced force?

46.

In the above figures, the arrows indicate the direction of force and the magnitude of the force is written above/below the arrows. Which box is experiencing a balanced force?

Answer»

In the above figures, the arrows indicate the direction of force and the magnitude of the force is written above/below the arrows.

Which box is experiencing a balanced force?

Discussion

47.	(a) What is an echo? How is echo formed? (b) What is the minimum distance in air required from a sound reflecting surface to hear an echo (at 20o C)? (c) A man standing 825 metres away from a cliff (steep rock) fires a gun. After how long will he hear its echo? The speed of sound in air is 330 m/s.
Answer» (a) What is an echo? How is echo formed? (b) What is the minimum distance in air required from a sound reflecting surface to hear an echo (at $20^{o}$ C)? (c) A man standing 825 metres away from a cliff (steep rock) fires a gun. After how long will he hear its echo? The speed of sound in air is $330 m / s$ .

47.

(a) What is an echo? How is echo formed? (b) What is the minimum distance in air required from a sound reflecting surface to hear an echo (at 20o C)? (c) A man standing 825 metres away from a cliff (steep rock) fires a gun. After how long will he hear its echo? The speed of sound in air is 330 m/s.

Answer»

(a) What is an echo? How is echo formed?

(b) What is the minimum distance in air required from a sound reflecting surface to hear an echo (at $20^{o}$ C)?

(c) A man standing 825 metres away from a cliff (steep rock) fires a gun. After how long will he hear its echo? The speed of sound in air is $330 m / s$ .

Discussion

48.	What is the scientific name of the 'upward force' acting on an object immersed in a liquid ?
Answer» What is the scientific name of the 'upward force' acting on an object immersed in a liquid ?

Discussion

49.	What conclusion can be obtained from the observation that when the prongs of a sound making tuning fork touch the surface of water in a beaker, the water gets splashed ?
Answer» What conclusion can be obtained from the observation that when the prongs of a sound making tuning fork touch the surface of water in a beaker, the water gets splashed ?

Discussion

50.	Question 73 The mass of an aluminium rod varies directly with its length. If a 16 cm long rod has a mass of 192 g, find the length of the rod whose mass is 105 g.
Answer» Question 73 The mass of an aluminium rod varies directly with its length. If a 16 cm long rod has a mass of 192 g, find the length of the rod whose mass is 105 g.

50.

Question 73 The mass of an aluminium rod varies directly with its length. If a 16 cm long rod has a mass of 192 g, find the length of the rod whose mass is 105 g.

Answer»

Question 73

The mass of an aluminium rod varies directly with its length. If a 16 cm long rod has a mass of 192 g, find the length of the rod whose mass is 105 g.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A ball is thrown from the top of a building. As it approaches the ground which of the following decreases?

Which of the following mirrors has a larger field of view?

A guitar produces a sound which has a frequency of 300 Hz and a wavelength of 1.3 m. Calculate the speed with which this sound travels.

How does the pitch of a sound depend on frequency ?

(a) What is the difference between 'distance travelled' by a body and its 'displacement' ? Explain with the help of a diagram. (b) An ant travels a distance of 8 cm from P to Q and then moves a distance of 6 cm at right angles to PQ. Find its resultant displacement.

What type of waves are illustrated by the movement of a rope whose one end is fixed to a pole and the other end is moved up and down ?

Two particles are placed at some distance from each other. If, keeping the distance between them unchanged, the mass of each of the two particles is doubled, the value of gravitational force between them will become : (a) 14 times (b) 12 times (c) 4 times (d) 2 times

A body of mass 2 kg having an initial speed of 11 m/s accelerated uniformly at 2 m/s for 5 seconds. What will be the final kinetic energy?

What causes compression and rarefaction in longitudinal waves ?

How is the thrust related to pressure ?

A ball A is thrown up vertically with speed u.At the same instant another ball B is released from rest at height h.At time t speed of A relative to B is ?

Name the force which is responsible for change in position or state of an object

A car is travelling with a speed of 36km/h. The driver applies brakes retards the car uniformly. The car is stopped in 5seconds. Find the retardation of the car and the distance travelled before it is stopped.

A ball thrown vertically upwards with a speed of 19.6 m/s from the top of a tower returns to the earth in 6s. Find the height of tower. What is a=-g in this case?

what happens to the momentum when two objects coming from different directions with different velocites collide and go in different directions.

Name the constituents of a cell.

Why momentum is used and for what purpose?

When an object of height 1cm is kept at a distance 4cm from a concave mirror, it's erect image of height 1.5cm is formed at a distance 6cm behind the mirror. Find the focal length of the mirror.

What is upthrust ? What are the quantities that can vary upthrust? How does it account for the floating of a body? when a partially immersed body is pressed down a little, what will happen to the upthrust?

When an object is moving with negative acceleratio then when force is negative does tha mean if some one goes in front of it and gets hit will he not get hit

Change in momentum when a car weighing 700kg changes its speed from 100m/s to 200 m/s is:

Consider a hydraulic system with two pistons, piston1 and piston2. A force F1 is applied to piston1 of area A1 and piston2 applies a force F2 over area A2. If we double the force applied by piston1 and reduce the area of piston2 by a factor of three, then the new force applied by piston2 is

A body weighs 48 N on the surface on earth, its weight at the centre of the earth is:

Discuss the law of conservation of momentum. State its unit. [3 MARKS]

When glass of water is freezed, formation of ice starts from the top layer but melting of ice starts from bottom. Justify.

At 20o C, the minimum distance of a person from a sound reflecting surface to hear an echo is : (a) 12.2 m (b) 17.2 m (c) 15.2 m (d) 34.4 m

What is meant by the quality (or timbre) of sound ? On what factor does the quality (or timbre) of a sound depend ?

Four wires each of same length diameter and material are connected to each other to form a square. If the resistance of each wire is R, then the equivalent resistance across the opposite corners is:

Differences between kinetic energy and potential energy?

A vessel at rest explodes into three pieces. Two pieces having equal masses fly off perpendicular to one another with the same velocity 30 metre per second. The third piece has three times mass of each of other piece. The magnitude and direction of the velocity of the third piece will be

Value of Gravitational constant G on moon

In which of the following cases the strength of the magnetic field inside an electromagnet would change?

Two spherical balls of mass 10 kg each are placed with their centers 10 cm apart. Find the gravitational force of attraction between them. Take G=6.67×10−11 Nm2kg−2

Why the handle of an ordinary water handpump made longer?

Explain the third law of Kepler.

Is P =W/t =mgh/t correct? Because W=F*s so how can W=mgh/t be the value of W?

_______ is the mass of one litre (1000 ml) of pure water at 4-degree Celsius.

A constant force is acting on a body, then: Mass × change in velocity = ___ × time interval.

The mass of water displaced by a solid of mass 400 g and volume 150 cm3 is

In the following graph, what is the acceleration at t =1s?

The brakes applied to a car produce a negative acceleration of 6 m/s2. If the car takes 2 seconds to stop after applying the brakes, calculate the distance it travels during this time. (Give your answer in m) __

Which of the following quantity causes motion in a body?

Which of the following is the formula for the time period of a simple pendulum?

What is the speed of sound in air ?

In the above figures, the arrows indicate the direction of force and the magnitude of the force is written above/below the arrows. Which box is experiencing a balanced force?

(a) What is an echo? How is echo formed? (b) What is the minimum distance in air required from a sound reflecting surface to hear an echo (at 20o C)? (c) A man standing 825 metres away from a cliff (steep rock) fires a gun. After how long will he hear its echo? The speed of sound in air is 330 m/s.

What is the scientific name of the 'upward force' acting on an object immersed in a liquid ?

What conclusion can be obtained from the observation that when the prongs of a sound making tuning fork touch the surface of water in a beaker, the water gets splashed ?

Question 73 The mass of an aluminium rod varies directly with its length. If a 16 cm long rod has a mass of 192 g, find the length of the rod whose mass is 105 g.