13232 + Interview Questions in Physics

1.	What is the amount of work to be done approximately on a car of mass text 1000 kg to increase its velocity from 10 km/hr to 20km/hr?
Answer» What is the amount of work to be done approximately on a car of mass text 1000 kg to increase its velocity from 10 km/hr to 20km/hr?

Discussion

2.	What will be the effect of global warming at the poles ?
Answer» What will be the effect of global warming at the poles ?

Discussion

3.	Suppose a planet exists, whose mass and radius both are half of the earth. Calculate the acceleration due to gravity on the surface of this planet. The universal law of gravitation states that every object exerts a gravitational force of attraction on every other object. If this is true, then why don't we see the various objects in a room moving towards one another?
Answer» Suppose a planet exists, whose mass and radius both are half of the earth. Calculate the acceleration due to gravity on the surface of this planet. The universal law of gravitation states that every object exerts a gravitational force of attraction on every other object. If this is true, then why don't we see the various objects in a room moving towards one another?

Discussion

4.	A light and heavy body have equal momentum. Which one has greater kinetic energy?
Answer» A light and heavy body have equal momentum. Which one has greater kinetic energy?

Discussion

5.	Why is butt of rifle kept broad.
Answer» Why is butt of rifle kept broad.

Discussion

6.	What is the power of a body which is doing work at the rate of one joule per second ?
Answer» What is the power of a body which is doing work at the rate of one joule per second ?

Discussion

7.	Question 22(i) An electron moving with a velocity of 5×104ms−1 enters into a uniform electric field and acquires a uniform acceleration of 104ms−2 in the direction of its initial motion. (i) Calculate the time in which the electron would acquire a velocity double of its initial velocity.
Answer» Question 22(i) An electron moving with a velocity of $5 \times 10^{4} m s^{- 1}$ enters into a uniform electric field and acquires a uniform acceleration of $10^{4} m s^{- 2}$ in the direction of its initial motion. (i) Calculate the time in which the electron would acquire a velocity double of its initial velocity.

Discussion

8.	While determing the density of the material of a sphere using a spring balance and measuring cylinder,a student noted the following readings a)Reading of water level in the cylinder without sphere in it=56ml b)Reading of water level in the cylinder with sphere in it=64ml If the mass of the sphere is 80g,calculate the density of the sphere.
Answer» While determing the density of the material of a sphere using a spring balance and measuring cylinder,a student noted the following readings a)Reading of water level in the cylinder without sphere in it=56ml b)Reading of water level in the cylinder with sphere in it=64ml If the mass of the sphere is 80g,calculate the density of the sphere.

8.

While determing the density of the material of a sphere using a spring balance and measuring cylinder,a student noted the following readings a)Reading of water level in the cylinder without sphere in it=56ml b)Reading of water level in the cylinder with sphere in it=64ml If the mass of the sphere is 80g,calculate the density of the sphere.

Answer»

While determing the density of the material of a sphere using a spring balance and measuring cylinder,a student noted the following readings

a)Reading of water level in the cylinder without sphere in it=56ml

b)Reading of water level in the cylinder with sphere in it=64ml

If the mass of the sphere is 80g,calculate the density of the sphere.

Discussion

9.	Why we have to hold the wooden board for inserting a iron nail in it?
Answer» Why we have to hold the wooden board for inserting a iron nail in it?

Discussion

10.	What happens to acceleration (a) When you double the force of an object (b) When you double the mass of an object
Answer» What happens to acceleration (a) When you double the force of an object (b) When you double the mass of an object

Discussion

11.	What is newton's third law of motion?
Answer» What is newton's third law of motion?

Discussion

12.	What is the relation between force and momentum and how are each of them calculated?
Answer» What is the relation between force and momentum and how are each of them calculated?

Discussion

13.	The circle of illumination is the –
Answer» The circle of illumination is the –

Discussion

14.	No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be
Answer» No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be

Discussion

15.	Question 1 (b) Judge the equivalent resistance when the following are connected in parallel – (b) 1Ω, 103Ω and 106Ω.
Answer» Question 1 (b) Judge the equivalent resistance when the following are connected in parallel – (b) $1 Ω$ , $10^{3} Ω$ and $10^{6} Ω$ .

Discussion

16.	If mass of an object is m, velocity v, acceleration a and applied force is F then the momentum is given by:
Answer» If mass of an object is m, velocity v, acceleration a and applied force is F then the momentum is given by:

Discussion

17.	A boy while playing under a mango tree saw a mango falling on his head. This is due to the force of:
Answer» A boy while playing under a mango tree saw a mango falling on his head. This is due to the force of:

Discussion

18.	For a body starting from rest and moving with uniform acceleration, the ratio of the distances covered for 1s, 2s, 3s, ..... is
Answer» For a body starting from rest and moving with uniform acceleration, the ratio of the distances covered for 1s, 2s, 3s, ..... is

Discussion

19.	A unitless quantity
Answer» A unitless quantity

Discussion

20.	Which of the bones in the middle ear are responsible for amplification of the vibrations?
Answer» Which of the bones in the middle ear are responsible for amplification of the vibrations?

Discussion

21.	An observer stands at a distance of 850 m from the cliff and fires a gun. After what time will he hear the echo of gunfire if sound travels at a speed of 350 ms−1 in the air?
Answer» An observer stands at a distance of $850 m$ from the cliff and fires a gun. After what time will he hear the echo of gunfire if sound travels at a speed of $350 m s^{- 1}$ in the air?

Discussion

22.	The excess of pressure inside a soap bubble than that of the outer pressure is
Answer» The excess of pressure inside a soap bubble than that of the outer pressure is

Discussion

23.	Question 3 Where should an object be placed in front of a convex lens to get a real image of the size of the object? (a) At the principal focus of the lens (b) At twice the focal length (c) At infinity (d) Between the optical centre of the lens and its principal focus
Answer» Question 3 Where should an object be placed in front of a convex lens to get a real image of the size of the object? (a) At the principal focus of the lens (b) At twice the focal length (c) At infinity (d) Between the optical centre of the lens and its principal focus

Discussion

24.	At normal temperature and pressure conditions, water boils at 100∘C. Deep down the mine, at what temperature will the water boil?
Answer» At normal temperature and pressure conditions, water boils at $100^{\circ} C$ . Deep down the mine, at what temperature will the water boil?

Discussion

25.	The relative density of silver is 10.8. The density of water is 1000 kg m−3. The density of silver is
Answer» The relative density of silver is $10.8.$ The density of water is $1000 k g m^{- 3}$ . The density of silver is

Discussion

26.	A ball is thrown upwards with a velocity of 10 ms−1. Find the maximum height reached by the ball.
Answer» A ball is thrown upwards with a velocity of $10 m s^{- 1}$ . Find the maximum height reached by the ball.

Discussion

27.	Question 9 What is the momentum of an object of mass m, moving with a velocity v? (a) (mv)2 (b) mv2 (c) 12mv2 (d) mv
Answer» Question 9 What is the momentum of an object of mass m, moving with a velocity v? (a) $(m v)^{2}$ (b) $m v^{2}$ (c) $\frac{1}{2} m v^{2}$ (d) mv

Discussion

28.	An object is placed at a distance of 10 cmfrom a concave mirror of radius of curvature 0.6 m. Which of the following statement is incorrect?
Answer» An object is placed at a distance of 10 $c m$ from a concave mirror of radius of curvature 0.6 $m$ . Which of the following statement is incorrect?

Discussion

29.	A marble with speed 20 cm/s rolls off the edge of a table 80 cm high. How long does it take to drop to the floor? How far horizontally from the table edge does the marble strike the floor?
Answer» A marble with speed 20 cm/s rolls off the edge of a table 80 cm high. How long does it take to drop to the floor? How far horizontally from the table edge does the marble strike the floor?

Discussion

30.	Calculate the work done to lift the 100 kg of water at the height of 10m.(take g=9.8m/s2)
Answer» Calculate the work done to lift the 100 kg of water at the height of 10m.(take g=9.8m/s²)

Discussion

31.	What is the effect of altitude on the value of g ?
Answer» What is the effect of altitude on the value of g ?

Discussion

32.	How does jet aeroplane fly in the air?
Answer» How does jet aeroplane fly in the air?

Discussion

33.	Like sound barrier, does light barrier also exist?
Answer» Like sound barrier, does light barrier also exist?

Discussion

34.	A lorry moving with 54km/h speed hits a rock and comes back to halt within 0.1s.if the mass of the lorry is twenty metric tone. Then find the force exerted .
Answer» A lorry moving with 54km/h speed hits a rock and comes back to halt within 0.1s.if the mass of the lorry is twenty metric tone. Then find the force exerted .

Discussion

35.	A car is moving in a circular path of radius 2 metre. Calculate both the distance and the magnitude of the displacement of the car after: 1) one complete revolution 2) one half revolution 3) one fourth revolution What can you conclude about the relationship between distance and displacement.
Answer» A car is moving in a circular path of radius 2 metre. Calculate both the distance and the magnitude of the displacement of the car after: 1) one complete revolution 2) one half revolution 3) one fourth revolution What can you conclude about the relationship between distance and displacement.

Discussion

36.	At what height above surface of earth the weight of an object will become 1\4 times of the weight at earth surface?( Radius of earth=6400km)
Answer» At what height above surface of earth the weight of an object will become 1\4 times of the weight at earth surface?( Radius of earth=6400km)

Discussion

37.	A bulb of 40 W is designed to operate at 240 V. What is the resistance of the filament of the bulb.
Answer» A bulb of $40 W$ is designed to operate at $240 V$ . What is the resistance of the filament of the bulb.

Discussion

38.	The perimeter of sheet of paper in the shape of a quadrant of a circle is 12.5 cm , then area of the paper is
Answer» The perimeter of sheet of paper in the shape of a quadrant of a circle is 12.5 cm , then area of the paper is

Discussion

39.	What is a lunar month?
Answer» What is a lunar month?

Discussion

40.	Oil spill took place in Indian Ocean from a oil refinery. What will be the implications?
Answer» Oil spill took place in Indian Ocean from a oil refinery. What will be the implications?

Discussion

41.	What is the work to be done to increase the velocity of a car from 30 km per hour to 60 km per hour if the mass of the car is 1500 kg?
Answer» What is the work to be done to increase the velocity of a car from 30 km per hour to 60 km per hour if the mass of the car is 1500 kg?

Discussion

42.	If water be used to construct a barometer, what would be the height of water column at standard atmospheric pressure i.e., 76 cm of mercury? Specific gravity of mercury = 13.6
Answer» If water be used to construct a barometer, what would be the height of water column at standard atmospheric pressure i.e., 76 cm of mercury? Specific gravity of mercury = 13.6

Discussion

43.	The distance (in km), from one edge to the other edge of the Milky Way is:
Answer» The distance (in km), from one edge to the other edge of the Milky Way is:

Discussion

44.	I am continuously shaking both my legs in an oscillating manner back and forth while sitting on a chair. I am i said to be in motion or not and why
Answer» I am continuously shaking both my legs in an oscillating manner back and forth while sitting on a chair. I am i said to be in motion or not and why

Discussion

45.	It is easier to swim in the seawater than in the river water, because:
Answer» It is easier to swim in the seawater than in the river water, because:

45.

It is easier to swim in the seawater than in the river water, because:

Answer»

It is easier to swim in the seawater than in the river water, because:

Discussion

46.	A bullet of mass 60 g is fired with a velocity of 60 m/s from a gun of mass 10 kg. Calculate the recoil velocity of the gun.
Answer» A bullet of mass 60 g is fired with a velocity of 60 m/s from a gun of mass 10 kg. Calculate the recoil velocity of the gun.

Discussion

47.	A gun weighing 4 kg fires a bullet of 40 g with a velocity of 500ms−1. With what velocity does the gun recoil?
Answer» A gun weighing 4 kg fires a bullet of 40 g with a velocity of $500 m s^{-} 1$ . With what velocity does the gun recoil?

Discussion

48.	In human eye, the power of accommodation is controlled by
Answer» In human eye, the power of accommodation is controlled by

Discussion

49.	In the figure given below iron filings are sprinkled on a cardboard perpendicular to which a current carrying copper wire runs. The other components of the circuit have their usual meanings If the polarity of the battery in the circuit is changed then
Answer» In the figure given below iron filings are sprinkled on a cardboard perpendicular to which a current carrying copper wire runs. The other components of the circuit have their usual meanings If the polarity of the battery in the circuit is changed then

49.

In the figure given below iron filings are sprinkled on a cardboard perpendicular to which a current carrying copper wire runs. The other components of the circuit have their usual meanings If the polarity of the battery in the circuit is changed then

Answer»

In the figure given below iron filings are sprinkled on a cardboard perpendicular to which a current carrying copper wire runs. The other components of the circuit have their usual meanings

If the polarity of the battery in the circuit is changed then

Discussion

50.	Question 3 (b) Fill in the blanks in the following statements: (b) A charged body ___an uncharged body towards it.
Answer» Question 3 (b) Fill in the blanks in the following statements: (b) A charged body ___an uncharged body towards it.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is the amount of work to be done approximately on a car of mass text 1000 kg to increase its velocity from 10 km/hr to 20km/hr?

What will be the effect of global warming at the poles ?

A light and heavy body have equal momentum. Which one has greater kinetic energy?

Why is butt of rifle kept broad.

What is the power of a body which is doing work at the rate of one joule per second ?

Question 22(i) An electron moving with a velocity of 5×104ms−1 enters into a uniform electric field and acquires a uniform acceleration of 104ms−2 in the direction of its initial motion. (i) Calculate the time in which the electron would acquire a velocity double of its initial velocity.

Why we have to hold the wooden board for inserting a iron nail in it?

What happens to acceleration (a) When you double the force of an object (b) When you double the mass of an object

What is newton's third law of motion?

What is the relation between force and momentum and how are each of them calculated?

The circle of illumination is the –

No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be

Question 1 (b) Judge the equivalent resistance when the following are connected in parallel – (b) 1Ω, 103Ω and 106Ω.

If mass of an object is m, velocity v, acceleration a and applied force is F then the momentum is given by:

A boy while playing under a mango tree saw a mango falling on his head. This is due to the force of:

For a body starting from rest and moving with uniform acceleration, the ratio of the distances covered for 1s, 2s, 3s, ..... is

A unitless quantity

Which of the bones in the middle ear are responsible for amplification of the vibrations?

An observer stands at a distance of 850 m from the cliff and fires a gun. After what time will he hear the echo of gunfire if sound travels at a speed of 350 ms−1 in the air?

The excess of pressure inside a soap bubble than that of the outer pressure is

Question 3 Where should an object be placed in front of a convex lens to get a real image of the size of the object? (a) At the principal focus of the lens (b) At twice the focal length (c) At infinity (d) Between the optical centre of the lens and its principal focus

At normal temperature and pressure conditions, water boils at 100∘C. Deep down the mine, at what temperature will the water boil?

The relative density of silver is 10.8. The density of water is 1000 kg m−3. The density of silver is

A ball is thrown upwards with a velocity of 10 ms−1. Find the maximum height reached by the ball.

Question 9 What is the momentum of an object of mass m, moving with a velocity v? (a) (mv)2 (b) mv2 (c) 12mv2 (d) mv

An object is placed at a distance of 10 cmfrom a concave mirror of radius of curvature 0.6 m. Which of the following statement is incorrect?

A marble with speed 20 cm/s rolls off the edge of a table 80 cm high. How long does it take to drop to the floor? How far horizontally from the table edge does the marble strike the floor?

Calculate the work done to lift the 100 kg of water at the height of 10m.(take g=9.8m/s2)

What is the effect of altitude on the value of g ?

How does jet aeroplane fly in the air?

Like sound barrier, does light barrier also exist?

A lorry moving with 54km/h speed hits a rock and comes back to halt within 0.1s.if the mass of the lorry is twenty metric tone. Then find the force exerted .

At what height above surface of earth the weight of an object will become 1\4 times of the weight at earth surface?( Radius of earth=6400km)

A bulb of 40 W is designed to operate at 240 V. What is the resistance of the filament of the bulb.

The perimeter of sheet of paper in the shape of a quadrant of a circle is 12.5 cm , then area of the paper is

What is a lunar month?

Oil spill took place in Indian Ocean from a oil refinery. What will be the implications?

What is the work to be done to increase the velocity of a car from 30 km per hour to 60 km per hour if the mass of the car is 1500 kg?

If water be used to construct a barometer, what would be the height of water column at standard atmospheric pressure i.e., 76 cm of mercury? Specific gravity of mercury = 13.6

The distance (in km), from one edge to the other edge of the Milky Way is:

I am continuously shaking both my legs in an oscillating manner back and forth while sitting on a chair. I am i said to be in motion or not and why

It is easier to swim in the seawater than in the river water, because:

A bullet of mass 60 g is fired with a velocity of 60 m/s from a gun of mass 10 kg. Calculate the recoil velocity of the gun.

A gun weighing 4 kg fires a bullet of 40 g with a velocity of 500ms−1. With what velocity does the gun recoil?

In human eye, the power of accommodation is controlled by

In the figure given below iron filings are sprinkled on a cardboard perpendicular to which a current carrying copper wire runs. The other components of the circuit have their usual meanings If the polarity of the battery in the circuit is changed then

Question 3 (b) Fill in the blanks in the following statements: (b) A charged body ___an uncharged body towards it.