16569 + Interview Questions in Physics

1.	If a turbine is build in a fast flowing stream of river without building dam, what energy conversion will happen for power generation?
Answer» If a turbine is build in a fast flowing stream of river without building dam, what energy conversion will happen for power generation?

Discussion

2.	As per the Dobereiner's triads, what should be the value of the ‘X’ in the given triad. Li (6.9), Na (X), K (39.0)
Answer» As per the Dobereiner's triads, what should be the value of the ‘X’ in the given triad. Li (6.9), Na (X), K (39.0)

Discussion

3.	For what position of an object, a real and diminished image is formed by a concave mirror ?
Answer» For what position of an object, a real and diminished image is formed by a concave mirror ?

Discussion

4.	During thermal expansion, ___ .
Answer» During thermal expansion, ___ .

Discussion

5.	What is the role of split rings in a motor and generator
Answer» What is the role of split rings in a motor and generator

Discussion

6.	A man landing with a parachute assumes a constant velocity a few 100 m above the ground. The man along with the parachute is said to be at
Answer» A man landing with a parachute assumes a constant velocity a few 100 m above the ground. The man along with the parachute is said to be at

Discussion

7.	What is the difference between focus and principal focus of concave and convex lenses
Answer» What is the difference between focus and principal focus of concave and convex lenses

Discussion

8.	A diverging lens is used in : (a) a magnifying glass (b) a car to see objects on rear side (c) spectacles for the correction of short sight (d) a simple camera
Answer» A diverging lens is used in : (a) a magnifying glass (b) a car to see objects on rear side (c) spectacles for the correction of short sight (d) a simple camera

Discussion

9.	What is the number of reflection and refraction taking place in water droplet in a primary rainbow?
Answer» What is the number of reflection and refraction taking place in water droplet in a primary rainbow?

Discussion

10.	A man raises a box of mass 50 kg to a height of 2 m in 20 s, while another man raises the same box to the same height in 50 s. (a) Compare:(i) the work done,and (ii) the power developed by them. (b) Calculate:(i) the work done,and (ii) the power developed by each man.Take g=10 N kg−1.
Answer» A man raises a box of mass 50 kg to a height of 2 m in 20 s, while another man raises the same box to the same height in 50 s. (a) Compare:(i) the work done,and (ii) the power developed by them. (b) Calculate:(i) the work done,and (ii) the power developed by each man.Take g=10 N $k g^{- 1}$ .

10.

A man raises a box of mass 50 kg to a height of 2 m in 20 s, while another man raises the same box to the same height in 50 s. (a) Compare:(i) the work done,and (ii) the power developed by them. (b) Calculate:(i) the work done,and (ii) the power developed by each man.Take g=10 N kg−1.

Answer»

A man raises a box of mass 50 kg to a height of 2 m in 20 s, while another man raises the same box to the same height in 50 s.

(a) Compare:(i) the work done,and (ii) the power developed by them.

(b) Calculate:(i) the work done,and (ii) the power developed by each man.Take g=10 N $k g^{- 1}$ .

Discussion

11.	In Figure (a) and (b), F1 and F2 are the two foci of the thin lenses and AB is the incident ray. Complete the diagram to show the path of the ray AB after refraction through each lens.
Answer» In Figure (a) and (b), $F_{1} a n d F_{2}$ are the two foci of the thin lenses and AB is the incident ray. Complete the diagram to show the path of the ray AB after refraction through each lens.

11.

In Figure (a) and (b), F1 and F2 are the two foci of the thin lenses and AB is the incident ray. Complete the diagram to show the path of the ray AB after refraction through each lens.

Answer»

In Figure (a) and (b), $F_{1} a n d F_{2}$ are the two foci of the thin lenses and AB is the incident ray. Complete the diagram to show the path of the ray AB after refraction through each lens.

Discussion

12.	Describe a simple experiment to veryfy the principle of moments, if you are supplied with a metre rule, a fulcrum and two springs with slotted weights.
Answer» Describe a simple experiment to veryfy the principle of moments, if you are supplied with a metre rule, a fulcrum and two springs with slotted weights.

Discussion

13.	An electic bulb is rated '100 W, 250 V' What information does this convey?
Answer» An electic bulb is rated '100 W, 250 V' What information does this convey?

Discussion

14.	The focal lengths of four convex lenses P, Q, R and S are 20 cm, 15 cm, 5 cm and 10 cm, respectively. The lens having greatest power is : (a) P (b) Q (c) R (d) S
Answer» The focal lengths of four convex lenses P, Q, R and S are 20 cm, 15 cm, 5 cm and 10 cm, respectively. The lens having greatest power is : (a) P (b) Q (c) R (d) S

Discussion

15.	Critical Angle is defined as
Answer» Critical Angle is defined as

Discussion

16.	Why is a series arrangement not used for connecting domestic electrical appliances in a circuit?
Answer» Why is a series arrangement not used for connecting domestic electrical appliances in a circuit?

Discussion

17.	To correct myopic vision one should use
Answer» To correct myopic vision one should use

Discussion

18.	Two resistors R1 and R2 are joined in series. Find the equivalent resistance.
Answer» Two resistors $R_{1}$ and $R_{2}$ are joined in series. Find the equivalent resistance.

Discussion

19.	Organisms invisible to the naked eye can be observed using
Answer» Organisms invisible to the naked eye can be observed using

Discussion

20.	A man is riding on a cycle with velocity 7.2 km/hr up a hill having a slope 1 in 20. The total mass of the man and cycle is 100 kg. The power of the man is
Answer» A man is riding on a cycle with velocity 7.2 km/hr up a hill having a slope 1 in 20. The total mass of the man and cycle is 100 kg. The power of the man is

Discussion

21.	Which is the transparent front part of the human eye?
Answer» Which is the transparent front part of the human eye?

Discussion

22.	SI units of current and resistance respectively are:
Answer» SI units of current and resistance respectively are:

Discussion

23.	To form an image twice the size of the object, using a convex lens of focal length 20 cm, the object distance must be
Answer» To form an image twice the size of the object, using a convex lens of focal length $20 c m$ , the object distance must be

Discussion

24.	What frequency do whales communicate at ?
Answer» What frequency do whales communicate at ?

Discussion

25.	A wire of resistance 9ohm is tripled on itself.New resistance?
Answer» A wire of resistance 9ohm is tripled on itself.New resistance?

Discussion

26.	In the given figure the galvanometer will not have a deflection if:
Answer» In the given figure the galvanometer will not have a deflection if:

Discussion

27.	A ray of light is normally incident on one face of an equilateral glass prism. Answer the following: (a) What is the angle of incidence on the first face of the prism? (b) What is the angle of refraction from the first face of the prism? (c) What will be the angle of incidence at the second face of the prism? (d) Will the light ray suffer minimum deviation by the prism?
Answer» A ray of light is normally incident on one face of an equilateral glass prism. Answer the following: (a) What is the angle of incidence on the first face of the prism? (b) What is the angle of refraction from the first face of the prism? (c) What will be the angle of incidence at the second face of the prism? (d) Will the light ray suffer minimum deviation by the prism?

27.

A ray of light is normally incident on one face of an equilateral glass prism. Answer the following: (a) What is the angle of incidence on the first face of the prism? (b) What is the angle of refraction from the first face of the prism? (c) What will be the angle of incidence at the second face of the prism? (d) Will the light ray suffer minimum deviation by the prism?

Answer»

A ray of light is normally incident on one face of an equilateral glass prism. Answer the following:

(a) What is the angle of incidence on the first face of the prism?

(b) What is the angle of refraction from the first face of the prism?

(c) What will be the angle of incidence at the second face of the prism?

(d) Will the light ray suffer minimum deviation by the prism?

Discussion

28.	Again, the engine does 41,000 J of useful work. If it sinks 9,000 J of energy in the form of heat to its cold reservoir, what is the efficiency of this engine?
Answer» Again, the engine does 41,000 J of useful work. If it sinks 9,000 J of energy in the form of heat to its cold reservoir, what is the efficiency of this engine?

Discussion

29.	What is the usual current rating of the fuse fire in the line to fed 1.lights and fans 2.appliances of 2kW or more power
Answer» What is the usual current rating of the fuse fire in the line to fed 1.lights and fans 2.appliances of 2kW or more power

Discussion

30.	Velocity of a car of mass 2 tonnes is increased from 36 km/hr to 144km/hr in 10 seconds. Calculate the force applied by its engine. [ 1 tonne = 1000kg]
Answer» Velocity of a car of mass 2 tonnes is increased from 36 km/hr to 144km/hr in 10 seconds. Calculate the force applied by its engine. [ 1 tonne = 1000kg]

Discussion

31.	An object of size 1cm is placed at a distance of 15cm in front of a convex lens of focal length 10cm . Find the nature, size, location of the image
Answer» An object of size 1cm is placed at a distance of 15cm in front of a convex lens of focal length 10cm . Find the nature, size, location of the image

Discussion

32.	Arjun and Khushi are two astronauts moving close to each other in outer space, Arjun suddenly feels his oxygen supply is running out and shouts out to Khushi, but Khushi cannot hear him. What is the most probable reason for this?
Answer» Arjun and Khushi are two astronauts moving close to each other in outer space, Arjun suddenly feels his oxygen supply is running out and shouts out to Khushi, but Khushi cannot hear him. What is the most probable reason for this?

Discussion

33.	What leads to formation of fire rainbow?
Answer» What leads to formation of fire rainbow?

Discussion

34.	As seen from above, the apparent depth of a liquid in a vessel is 15 cm, when its real depth is 20 cm. Find the refractive index of the liquid.
Answer» As seen from above, the apparent depth of a liquid in a vessel is $15 c m$ , when its real depth is $20 c m$ . Find the refractive index of the liquid.

Discussion

35.	Use the following information to answer the next question. Two simple electric circuits are shown in the given figure. Direction of the current flowing through a wire segment can be shown as for current from O to O'. Which wire segment is not paired with the arrow head showing the direction of current flowing through it?
Answer» Use the following information to answer the next question. Two simple electric circuits are shown in the given figure. Direction of the current flowing through a wire segment can be shown as for current from O to O'. Which wire segment is not paired with the arrow head showing the direction of current flowing through it?

35.

Use the following information to answer the next question. Two simple electric circuits are shown in the given figure. Direction of the current flowing through a wire segment can be shown as for current from O to O'. Which wire segment is not paired with the arrow head showing the direction of current flowing through it?

Answer»

Use the following information to answer the next question.

Two simple electric circuits are shown in the given figure.

Direction of the current flowing through a wire segment can be shown as for current from O to O'.

Which wire segment is not paired with the arrow head showing the direction of current flowing through it?

Discussion

36.	Which of the following concerning a d.c. motor is correct? (1) It converts electrical energy to mechanical energy. (2) The commutator rotates together with the coil in the magnetic field.
Answer» Which of the following concerning a d.c. motor is correct? (1) It converts electrical energy to mechanical energy. (2) The commutator rotates together with the coil in the magnetic field.

36.

Which of the following concerning a d.c. motor is correct? (1) It converts electrical energy to mechanical energy. (2) The commutator rotates together with the coil in the magnetic field.

Answer»

Which of the following concerning a d.c. motor is correct?

(1) It converts electrical energy to mechanical energy.
(2) The commutator rotates together with the coil in the magnetic field.

Discussion

37.	What is equivalent Celsius value for 55 ∘F?
Answer» What is equivalent Celsius value for $55^{\circ} F$ ?

Discussion

38.	Q. Are the forces due to charge only attractive?
Answer» Q. Are the forces due to charge only attractive?

Discussion

39.	A force of 5 kgf is required to cut a metal sheet. A shears used for cutting the metal sheet has its blades 5 cm long, while its handles are 10 cm long . What effort is needed to cut the sheet ?
Answer» A force of 5 kgf is required to cut a metal sheet. A shears used for cutting the metal sheet has its blades 5 cm long, while its handles are 10 cm long . What effort is needed to cut the sheet ?

Discussion

40.	Why hydro power plants are associated with dams? [3 MARKS]
Answer» Why hydro power plants are associated with dams? [3 MARKS]

Discussion

41.	An electric kettle is rated 2.5 kW, 250 V. The cost of running the kettle for two hours at 60 paise per unit will be
Answer» An electric kettle is rated 2.5 kW, 250 V. The cost of running the kettle for two hours at 60 paise per unit will be

Discussion

42.	Ram has 2 different resistors whose resistance is unknown. He connects the resistors one by one across a battery source along with a galvanometer. He gets a higher deflection in the galvanometer when using the first resistor R1. So Which resistor has more resistance R1 or R2 ?
Answer» Ram has 2 different resistors whose resistance is unknown. He connects the resistors one by one across a battery source along with a galvanometer. He gets a higher deflection in the galvanometer when using the first resistor $R_{1}$ . So Which resistor has more resistance $R_{1}$ or $R_{2}$ ?

Discussion

43.	Identify the condition, which will form a real, inverted and enlarged image.
Answer» Identify the condition, which will form a real, inverted and enlarged image.

Discussion

44.	Polar is located at a distance of 434 light-years from Earth. If this distance is to be expressed in astronomical units, what will be the value?
Answer» Polar is located at a distance of 434 light-years from Earth. If this distance is to be expressed in astronomical units, what will be the value?

Discussion

45.	When external forces acting on a body are zero, then its centre of mass
Answer» When external forces acting on a body are zero, then its centre of mass

Discussion

46.	Harry is standing in front of a plane mirror at a distance of 6 m. His image on the other side will form at a distance of
Answer» Harry is standing in front of a plane mirror at a distance of 6 m. His image on the other side will form at a distance of

Discussion

47.	What is the nature and focal length of the lens If the power of a lens is + 0.1 D?
Answer» What is the nature and focal length of the lens If the power of a lens is $+ 0.1 D$ ?

Discussion

48.	Two bodies of mass 3 kg and 1 kg have equal momentum. Ratio of their kinetic energy is:
Answer» Two bodies of mass 3 kg and 1 kg have equal momentum. Ratio of their kinetic energy is:

Discussion

49.	Heat transfer through conduction is ___.
Answer» Heat transfer through conduction is ___.

Discussion

50.	Voltage drop accross 100 ohm resistor is
Answer» Voltage drop accross 100 ohm resistor is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

If a turbine is build in a fast flowing stream of river without building dam, what energy conversion will happen for power generation?

As per the Dobereiner's triads, what should be the value of the ‘X’ in the given triad. Li (6.9), Na (X), K (39.0)

For what position of an object, a real and diminished image is formed by a concave mirror ?

During thermal expansion, ___ .

What is the role of split rings in a motor and generator

A man landing with a parachute assumes a constant velocity a few 100 m above the ground. The man along with the parachute is said to be at

What is the difference between focus and principal focus of concave and convex lenses

A diverging lens is used in : (a) a magnifying glass (b) a car to see objects on rear side (c) spectacles for the correction of short sight (d) a simple camera

What is the number of reflection and refraction taking place in water droplet in a primary rainbow?

A man raises a box of mass 50 kg to a height of 2 m in 20 s, while another man raises the same box to the same height in 50 s. (a) Compare:(i) the work done,and (ii) the power developed by them. (b) Calculate:(i) the work done,and (ii) the power developed by each man.Take g=10 N kg−1.

In Figure (a) and (b), F1 and F2 are the two foci of the thin lenses and AB is the incident ray. Complete the diagram to show the path of the ray AB after refraction through each lens.

Describe a simple experiment to veryfy the principle of moments, if you are supplied with a metre rule, a fulcrum and two springs with slotted weights.

An electic bulb is rated '100 W, 250 V' What information does this convey?

The focal lengths of four convex lenses P, Q, R and S are 20 cm, 15 cm, 5 cm and 10 cm, respectively. The lens having greatest power is : (a) P (b) Q (c) R (d) S

Critical Angle is defined as

Why is a series arrangement not used for connecting domestic electrical appliances in a circuit?

To correct myopic vision one should use

Two resistors R1 and R2 are joined in series. Find the equivalent resistance.

Organisms invisible to the naked eye can be observed using

A man is riding on a cycle with velocity 7.2 km/hr up a hill having a slope 1 in 20. The total mass of the man and cycle is 100 kg. The power of the man is

Which is the transparent front part of the human eye?

SI units of current and resistance respectively are:

To form an image twice the size of the object, using a convex lens of focal length 20 cm, the object distance must be

What frequency do whales communicate at ?

A wire of resistance 9ohm is tripled on itself.New resistance?

In the given figure the galvanometer will not have a deflection if:

Again, the engine does 41,000 J of useful work. If it sinks 9,000 J of energy in the form of heat to its cold reservoir, what is the efficiency of this engine?

What is the usual current rating of the fuse fire in the line to fed 1.lights and fans 2.appliances of 2kW or more power

Velocity of a car of mass 2 tonnes is increased from 36 km/hr to 144km/hr in 10 seconds. Calculate the force applied by its engine. [ 1 tonne = 1000kg]

An object of size 1cm is placed at a distance of 15cm in front of a convex lens of focal length 10cm . Find the nature, size, location of the image

Arjun and Khushi are two astronauts moving close to each other in outer space, Arjun suddenly feels his oxygen supply is running out and shouts out to Khushi, but Khushi cannot hear him. What is the most probable reason for this?

What leads to formation of fire rainbow?

As seen from above, the apparent depth of a liquid in a vessel is 15 cm, when its real depth is 20 cm. Find the refractive index of the liquid.

Which of the following concerning a d.c. motor is correct? (1) It converts electrical energy to mechanical energy. (2) The commutator rotates together with the coil in the magnetic field.

What is equivalent Celsius value for 55 ∘F?

Q. Are the forces due to charge only attractive?

A force of 5 kgf is required to cut a metal sheet. A shears used for cutting the metal sheet has its blades 5 cm long, while its handles are 10 cm long . What effort is needed to cut the sheet ?

Why hydro power plants are associated with dams? [3 MARKS]

An electric kettle is rated 2.5 kW, 250 V. The cost of running the kettle for two hours at 60 paise per unit will be

Ram has 2 different resistors whose resistance is unknown. He connects the resistors one by one across a battery source along with a galvanometer. He gets a higher deflection in the galvanometer when using the first resistor R1. So Which resistor has more resistance R1 or R2 ?

Identify the condition, which will form a real, inverted and enlarged image.

Polar is located at a distance of 434 light-years from Earth. If this distance is to be expressed in astronomical units, what will be the value?

When external forces acting on a body are zero, then its centre of mass

Harry is standing in front of a plane mirror at a distance of 6 m. His image on the other side will form at a distance of

What is the nature and focal length of the lens If the power of a lens is + 0.1 D?

Two bodies of mass 3 kg and 1 kg have equal momentum. Ratio of their kinetic energy is:

Heat transfer through conduction is ___.

Voltage drop accross 100 ohm resistor is