13232 + Interview Questions in Physics

1.	What is a neutral point? How is the position of neutral point located with the use of a compass needle?
Answer» What is a neutral point? How is the position of neutral point located with the use of a compass needle?

Discussion

2.	For a constant acceleration, the nature of velocity-time graph is:
Answer» For a constant acceleration, the nature of velocity-time graph is:

2.

For a constant acceleration, the nature of velocity-time graph is:

Answer»

For a constant acceleration, the nature of velocity-time graph is:

Discussion

3.	The frequency of a source of sound is 100 Hz. How many times does it vibrate in a minute?
Answer» The frequency of a source of sound is 100 Hz. How many times does it vibrate in a minute?

Discussion

4.	A person who can see nearby objects clearly, but cannot see distant objects distinctly is said to be suffering from
Answer» A person who can see nearby objects clearly, but cannot see distant objects distinctly is said to be suffering from

Discussion

5.	Rahul and Rohan are climbing two different hills of the same height but different inclinations. Rahul's hill is making less angle with horizontal than that of Rohit's. Who is doing more work in climbing to the top? (Assume they have equal mass)
Answer» Rahul and Rohan are climbing two different hills of the same height but different inclinations. Rahul's hill is making less angle with horizontal than that of Rohit's. Who is doing more work in climbing to the top? (Assume they have equal mass)

Discussion

6.	An airplane accelerates on the runway at 3.0 m s−2. It has two engines which exert a total thrust of 3.0× 105N. What is the mass of this airplane?
Answer» An airplane accelerates on the runway at $3.0 m s^{- 2}$ . It has two engines which exert a total thrust of $3.0 \times$ $10^{5} N$ . What is the mass of this airplane?

Discussion

7.	A car travels from Bangalore to Mumbai and returns in 20 hours. What is the average velocity and average speed of the car if odometer reading of the car, when it started was 2200 km and when finished was 3800 km?
Answer» A car travels from Bangalore to Mumbai and returns in $20 h o u r s$ . What is the average velocity and average speed of the car if odometer reading of the car, when it started was $2200 k m$ and when finished was $3800 k m$ ?

Discussion

8.	Milk turns sour at 40∘C three times as faster as 0∘C. Hence, Ea in the process of turning of milk sour is
Answer» Milk turns sour at $40^{\circ}$ C three times as faster as $0^{\circ}$ C. Hence, $E_{a}$ in the process of turning of milk sour is

Discussion

9.	The mass of a coin in air is 100 g. When it is completely immersed in water, its weight reduces by 0.061 N. What is the mass of the water displaced by the coin?
Answer» The mass of a coin in air is 100 g. When it is completely immersed in water, its weight reduces by 0.061 N. What is the mass of the water displaced by the coin?

9.

The mass of a coin in air is 100 g. When it is completely immersed in water, its weight reduces by 0.061 N. What is the mass of the water displaced by the coin?

Answer»

The mass of a coin in air is 100 g. When it is completely immersed in water, its weight reduces by 0.061 N.

What is the mass of the water displaced by the coin?

Discussion

10.	Question 17 An electric heater of resistance 8Ω draws 15 A from the service mains 2 hours. Calculate the rate at which heat is developed in the heater.
Answer» Question 17 An electric heater of resistance $8 Ω$ draws 15 A from the service mains 2 hours. Calculate the rate at which heat is developed in the heater.

Discussion

11.	In a photo electric emission process from a metal of work function 1.8 eV, the kinetic energy of most energetic electrons is 0.5 eV. The corresponding stopping potential is
Answer» In a photo electric emission process from a metal of work function 1.8 eV, the kinetic energy of most energetic electrons is 0.5 eV. The corresponding stopping potential is

Discussion

12.	In the following displacement-time graph describing the motion of a body, what would be its average velocity in ms−1 from starting to the end of 9 seconds?
Answer» In the following displacement-time graph describing the motion of a body, what would be its average velocity in $m s^{- 1}$ from starting to the end of $9 s e c o n d s$ ?

Discussion

13.	Given mass of earth =6.4×1024 kg , radius of earth = 6.4×106 m. Calculate the force of attraction experienced by a man of mass 50 kg.
Answer» Given mass of earth = $6.4 \times 10^{24}$ kg , radius of earth = $6.4 \times 10^{6}$ m. Calculate the force of attraction experienced by a man of mass 50 kg.

Discussion

14.	The pressure difference for movement of wind is created by:
Answer» The pressure difference for movement of wind is created by:

Discussion

15.	A ball is thrown upwards with an initial velocity of 20 ms−1. Find the time of flight and the maximum height reached by the body respectively. (g=10 ms−2)
Answer» A ball is thrown upwards with an initial velocity of $20 m s^{- 1}$ . Find the time of flight and the maximum height reached by the body respectively. ( $g = 10 m s^{- 2}$ )

Discussion

16.	Focus of a plane mirror is at ___.
Answer» Focus of a plane mirror is at ___.

Discussion

17.	How is it that both weight and work done are represented by W?
Answer» How is it that both weight and work done are represented by W?

Discussion

18.	How is the small cotton thread used to light the oil lamp(diyas) able to soak the oil in a reverse motion or backward when gravity will totally resist anything to move upward . then how is this possible?
Answer» How is the small cotton thread used to light the oil lamp(diyas) able to soak the oil in a reverse motion or backward when gravity will totally resist anything to move upward . then how is this possible?

Discussion

19.	What is gravity made up of?
Answer» What is gravity made up of?

Discussion

20.	The echo of a sound is heard after 5 seconds. If the speed of sound in the air is 342 m/s. calculate the distance of the reflecting surface.
Answer» The echo of a sound is heard after 5 seconds. If the speed of sound in the air is 342 m/s. calculate the distance of the reflecting surface.

Discussion

21.	The gravitational force of attraction between two objects is x. Keeping the masses of the objects unchanged, if the distance between the objects is halved, then the magnitude of gravitational force between them will become : (a) x/4 (b) x/2 (c) 2x (d) 4x
Answer» The gravitational force of attraction between two objects is x. Keeping the masses of the objects unchanged, if the distance between the objects is halved, then the magnitude of gravitational force between them will become : (a) $x / 4$ (b) $x / 2$ (c) $2 x$ (d) $4 x$

21.

The gravitational force of attraction between two objects is x. Keeping the masses of the objects unchanged, if the distance between the objects is halved, then the magnitude of gravitational force between them will become : (a) x/4 (b) x/2 (c) 2x (d) 4x

Answer»

The gravitational force of attraction between two objects is x. Keeping the masses of the objects unchanged, if the distance between the objects is halved, then the magnitude of gravitational force between them will become :

(a) $x / 4$
(b) $x / 2$
(c) $2 x$
(d) $4 x$

Discussion

22.	Which of the following is/are the properties of a magnet?
Answer» Which of the following is/are the properties of a magnet?

Discussion

23.	When light enters normally into turpentine oil (μ=1.47)from water, its speed ________ .
Answer» When light enters normally into turpentine oil ( $μ = 1.47)$ from water, its speed ________ .

Discussion

24.	A destroyer sends out an ultrasound to detect the presence of any submarine. A reflection of the ultrasound (reflected back from a submarine) is detected 5.8 seconds after its transmission. The speed of the ultrasound is 1531 m/s. What is the distance between the submarine and the destroyer?
Answer» A destroyer sends out an ultrasound to detect the presence of any submarine. A reflection of the ultrasound (reflected back from a submarine) is detected 5.8 seconds after its transmission. The speed of the ultrasound is 1531 m/s. What is the distance between the submarine and the destroyer?

24.

A destroyer sends out an ultrasound to detect the presence of any submarine. A reflection of the ultrasound (reflected back from a submarine) is detected 5.8 seconds after its transmission. The speed of the ultrasound is 1531 m/s. What is the distance between the submarine and the destroyer?

Answer»

A destroyer sends out an ultrasound to detect the presence of any submarine. A reflection of the ultrasound (reflected back from a submarine) is detected 5.8 seconds after its transmission. The speed of the ultrasound is 1531 m/s.

What is the distance between the submarine and the destroyer?

Discussion

25.	Why is the floating ice less submerged in brine than in water ?
Answer» Why is the floating ice less submerged in brine than in water ?

Discussion

26.	Brakes are applied by a truck to produce retardation of 10 ms−2. If the truck takes 5 seconds to stop after applying the brakes, the distance covered by the truck before coming to rest is
Answer» Brakes are applied by a truck to produce retardation of $10 m s^{- 2}$ . If the truck takes 5 seconds to stop after applying the brakes, the distance covered by the truck before coming to rest is

Discussion

27.	What is an altimeter ? State its principle. How is it's scale calibrated ?
Answer» What is an altimeter ? State its principle. How is it's scale calibrated ?

Discussion

28.	As we go inside the earth, what is the effect on the value of g ?
Answer» As we go inside the earth, what is the effect on the value of g ?

Discussion

29.	Which of the following factors affect the viscosity of a liquid?
Answer» Which of the following factors affect the viscosity of a liquid?

Discussion

30.	The earth's gravitational force causes an acceleration of 5 ms−2 in a 1 kg mass somewhere in space. How much will the acceleration of a 3 kg mass be at the same place?
Answer» The earth's gravitational force causes an acceleration of 5 $m s^{- 2}$ in a 1 kg mass somewhere in space. How much will the acceleration of a 3 kg mass be at the same place?

Discussion

31.	Example to prove that two bodies having same quantity of heat may differ in their temperatures.
Answer» Example to prove that two bodies having same quantity of heat may differ in their temperatures.

Discussion

32.	Newton's second law of motion? With explanation!
Answer» Newton's second law of motion? With explanation!

Discussion

33.	Rahul drove his car with speed of 20km/hr while going to his college . When he returned to his home along the same route the speed of car is 30km/hr. Calculate the average speed of the car during the entire journey
Answer» Rahul drove his car with speed of 20km/hr while going to his college . When he returned to his home along the same route the speed of car is 30km/hr. Calculate the average speed of the car during the entire journey

Discussion

34.	A drawing pin is pierced in a wooden table with a force of 5N.Calculate the pressure exerted by the pin on the wooden table if the area is 0.02mm
Answer» A drawing pin is pierced in a wooden table with a force of 5N.Calculate the pressure exerted by the pin on the wooden table if the area is 0.02mm

Discussion

35.	Name the eye defect in which eye lens becomes cloudy or milky. Mention the method for its correction. A person uses a lens of power -1.0 D for correcting his distant vision and for correcting his near vision he uses a lens of power + 2.0 D. Calculate the focal length of the lenses required to correct these defects. Explain why a normal eye is not able to see clearly the objects placed closer than the near points.
Answer» Name the eye defect in which eye lens becomes cloudy or milky. Mention the method for its correction. A person uses a lens of power -1.0 D for correcting his distant vision and for correcting his near vision he uses a lens of power + 2.0 D. Calculate the focal length of the lenses required to correct these defects. Explain why a normal eye is not able to see clearly the objects placed closer than the near points.

Discussion

36.	When you will say a body is in uniform accleration non uniform accleration
Answer» When you will say a body is in uniform accleration non uniform accleration

36.

When you will say a body is in uniform accleration non uniform accleration

Answer»

When you will say a body is in

uniform accleration

non uniform accleration

Discussion

37.	What is apparent weight?
Answer» What is apparent weight?

Discussion

38.	The density of tap water is less than that of sea water. if an object is immersed completely in both one by one, what will be the loss in weight?
Answer» The density of tap water is less than that of sea water. if an object is immersed completely in both one by one, what will be the loss in weight?

Discussion

39.	Newton's 1st law is in second law of newton. Justify the statement
Answer» Newton's 1st law is in second law of newton. Justify the statement

Discussion

40.	A wire of given material having length l and area of cross-sectional area A has a resistance of 4 ohms. What would be the resistance of another wire of the same material having length l2 and area of cross-section 2A?
Answer» A wire of given material having length $l$ and area of cross-sectional area $A$ has a resistance of 4 ohms. What would be the resistance of another wire of the same material having length $\frac{l}{2}$ and area of cross-section $2 A$ ?

Discussion

41.	The wavelength of light of a particular colour is 5800 A∘. Express it in (a) nanometre and (b) metre.
Answer» The wavelength of light of a particular colour is 5800 $A^{\circ}$ . Express it in (a) nanometre and (b) metre.

41.

The wavelength of light of a particular colour is 5800 A∘. Express it in (a) nanometre and (b) metre.

Answer»

The wavelength of light of a particular colour is 5800 $A^{\circ}$ . Express it in

(a) nanometre and

(b) metre.

Discussion

42.	What does the given symbol represent? (∑15i=1Xi)15
Answer» What does the given symbol represent? $\frac{(\sum_{i = 1}^{15} X_{i})}{15}$

42.

What does the given symbol represent? (∑15i=1Xi)15

Answer»

What does the given symbol represent?

$\frac{(\sum_{i = 1}^{15} X_{i})}{15}$

Discussion

43.	Why we should conserve momentum? Please explain in simple manner.what is the need to conserve momentum
Answer» Why we should conserve momentum? Please explain in simple manner.what is the need to conserve momentum

Discussion

44.	We saw in Newton's laws of motion that if we apply an external unbalanced force on a ball,it will move and also will come to a stop because of gravitational pull and also frictional force. If we do the same thing in space,will the ball come to a stop? Because,in space there is no frictional force and no gravitational pull,so will it come to stop?
Answer» We saw in Newton's laws of motion that if we apply an external unbalanced force on a ball,it will move and also will come to a stop because of gravitational pull and also frictional force. If we do the same thing in space,will the ball come to a stop? Because,in space there is no frictional force and no gravitational pull,so will it come to stop?

44.

We saw in Newton's laws of motion that if we apply an external unbalanced force on a ball,it will move and also will come to a stop because of gravitational pull and also frictional force. If we do the same thing in space,will the ball come to a stop? Because,in space there is no frictional force and no gravitational pull,so will it come to stop?

Answer»

We saw in Newton's laws of motion that if we apply an external unbalanced force on a ball,it will move and also will come to a stop because of gravitational pull and also frictional force. If we do the same thing in space,will the ball come to a stop?

Because,in space there is no frictional force and no gravitational pull,so will it come to stop?

Discussion

45.	How is the distance related with time for the motion under uniform acceleration such as the motion of a freely falling body?
Answer» How is the distance related with time for the motion under uniform acceleration such as the motion of a freely falling body?

Discussion

46.	How will global warming affect the agriculture ?
Answer» How will global warming affect the agriculture ?

Discussion

47.	How is the mechanical advantage (M.A) related to the velocity ratio(V.R) for an ideal machine?
Answer» How is the mechanical advantage (M.A) related to the velocity ratio(V.R) for an ideal machine?

Discussion

48.	A ball of mass 0.1 kg is thrown against a wall... It strikes the wall normally with a velocity of 30 m/s and rebounds with a velocity of 20 m/s. Calculate the change in momentum of the ball...
Answer» A ball of mass 0.1 kg is thrown against a wall... It strikes the wall normally with a velocity of 30 m/s and rebounds with a velocity of 20 m/s. Calculate the change in momentum of the ball...

Discussion

49.	A lump of cheese of weight 24 N is kept on a table. It is a cubic lump with an area 6 cm2. What pressure does it exert on the table?
Answer» A lump of cheese of weight 24 N is kept on a table. It is a cubic lump with an area 6 $c m^{2}$ . What pressure does it exert on the table?

49.

A lump of cheese of weight 24 N is kept on a table. It is a cubic lump with an area 6 cm2. What pressure does it exert on the table?

Answer»

A lump of cheese of weight 24 N is kept on a table. It is a cubic lump with an area 6 $c m^{2}$ . What pressure does it exert on the table?

Discussion

50.	If we fold the paper into two halves and press it hard then it creates a line between it and then if we try to tear it apart it is much easier . Why?
Answer» If we fold the paper into two halves and press it hard then it creates a line between it and then if we try to tear it apart it is much easier . Why?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is a neutral point? How is the position of neutral point located with the use of a compass needle?

For a constant acceleration, the nature of velocity-time graph is:

The frequency of a source of sound is 100 Hz. How many times does it vibrate in a minute?

A person who can see nearby objects clearly, but cannot see distant objects distinctly is said to be suffering from

Rahul and Rohan are climbing two different hills of the same height but different inclinations. Rahul's hill is making less angle with horizontal than that of Rohit's. Who is doing more work in climbing to the top? (Assume they have equal mass)

An airplane accelerates on the runway at 3.0 m s−2. It has two engines which exert a total thrust of 3.0× 105N. What is the mass of this airplane?

A car travels from Bangalore to Mumbai and returns in 20 hours. What is the average velocity and average speed of the car if odometer reading of the car, when it started was 2200 km and when finished was 3800 km?

Milk turns sour at 40∘C three times as faster as 0∘C. Hence, Ea in the process of turning of milk sour is

The mass of a coin in air is 100 g. When it is completely immersed in water, its weight reduces by 0.061 N. What is the mass of the water displaced by the coin?

Question 17 An electric heater of resistance 8Ω draws 15 A from the service mains 2 hours. Calculate the rate at which heat is developed in the heater.

In a photo electric emission process from a metal of work function 1.8 eV, the kinetic energy of most energetic electrons is 0.5 eV. The corresponding stopping potential is

In the following displacement-time graph describing the motion of a body, what would be its average velocity in ms−1 from starting to the end of 9 seconds?

Given mass of earth =6.4×1024 kg , radius of earth = 6.4×106 m. Calculate the force of attraction experienced by a man of mass 50 kg.

The pressure difference for movement of wind is created by:

A ball is thrown upwards with an initial velocity of 20 ms−1. Find the time of flight and the maximum height reached by the body respectively. (g=10 ms−2)

Focus of a plane mirror is at ___.

How is it that both weight and work done are represented by W​​​​​​?

How is the small cotton thread used to light the oil lamp(diyas) able to soak the oil in a reverse motion or backward when gravity will totally resist anything to move upward . then how is this possible?

What is gravity made up of?

The echo of a sound is heard after 5 seconds. If the speed of sound in the air is 342 m/s. calculate the distance of the reflecting surface.

The gravitational force of attraction between two objects is x. Keeping the masses of the objects unchanged, if the distance between the objects is halved, then the magnitude of gravitational force between them will become : (a) x/4 (b) x/2 (c) 2x (d) 4x

Which of the following is/are the properties of a magnet?

When light enters normally into turpentine oil (μ=1.47)from water, its speed ________ .

A destroyer sends out an ultrasound to detect the presence of any submarine. A reflection of the ultrasound (reflected back from a submarine) is detected 5.8 seconds after its transmission. The speed of the ultrasound is 1531 m/s. What is the distance between the submarine and the destroyer?

Why is the floating ice less submerged in brine than in water ?

Brakes are applied by a truck to produce retardation of 10 ms−2. If the truck takes 5 seconds to stop after applying the brakes, the distance covered by the truck before coming to rest is

What is an altimeter ? State its principle. How is it's scale calibrated ?

As we go inside the earth, what is the effect on the value of g ?

Which of the following factors affect the viscosity of a liquid?

The earth's gravitational force causes an acceleration of 5 ms−2 in a 1 kg mass somewhere in space. How much will the acceleration of a 3 kg mass be at the same place?

Example to prove that two bodies having same quantity of heat may differ in their temperatures.

Newton's second law of motion? With explanation!

Rahul drove his car with speed of 20km/hr while going to his college . When he returned to his home along the same route the speed of car is 30km/hr. Calculate the average speed of the car during the entire journey

A drawing pin is pierced in a wooden table with a force of 5N.Calculate the pressure exerted by the pin on the wooden table if the area is 0.02mm

When you will say a body is in uniform accleration non uniform accleration

What is apparent weight?

The density of tap water is less than that of sea water. if an object is immersed completely in both one by one, what will be the loss in weight?

Newton's 1st law is in second law of newton. Justify the statement

A wire of given material having length l and area of cross-sectional area A has a resistance of 4 ohms. What would be the resistance of another wire of the same material having length l2 and area of cross-section 2A?

The wavelength of light of a particular colour is 5800 A∘. Express it in (a) nanometre and (b) metre.

What does the given symbol represent? (∑15i=1Xi)15

Why we should conserve momentum? Please explain in simple manner.what is the need to conserve momentum

How is the distance related with time for the motion under uniform acceleration such as the motion of a freely falling body?

How will global warming affect the agriculture ?

How is the mechanical advantage (M.A) related to the velocity ratio(V.R) for an ideal machine?

A ball of mass 0.1 kg is thrown against a wall... It strikes the wall normally with a velocity of 30 m/s and rebounds with a velocity of 20 m/s. Calculate the change in momentum of the ball...

A lump of cheese of weight 24 N is kept on a table. It is a cubic lump with an area 6 cm2. What pressure does it exert on the table?

If we fold the paper into two halves and press it hard then it creates a line between it and then if we try to tear it apart it is much easier . Why?

How is it that both weight and work done are represented by W?