16569 + Interview Questions in Physics

1.	(a) Solar cells are used to provide the electric current to charge the batteries of a car driven by an electric motor. Describe the energy changes which take place. (b) What differences would you expect in the charging of car batteries (i) on bright sunlight (ii) on a cloudy day (iii) at night ?
Answer» (a) Solar cells are used to provide the electric current to charge the batteries of a car driven by an electric motor. Describe the energy changes which take place. (b) What differences would you expect in the charging of car batteries (i) on bright sunlight (ii) on a cloudy day (iii) at night ?

Discussion

2.	A body of mass 'm' moving with velocity 'v' collides head on elastically with another body of mass '2m' which was initially at rest. The ratio of K.E. of colliding body of mass 'm' before and after collision would be
Answer» A body of mass 'm' moving with velocity 'v' collides head on elastically with another body of mass '2m' which was initially at rest. The ratio of K.E. of colliding body of mass 'm' before and after collision would be

Discussion

3.	In a house, the connections are such that a bulb is in parallel with the fan and geyser. The resistances offered by them being 10Ω, 10Ω and 220Ω. The voltage for the house is 220V. Find the power consumed by the geyser because every time the geyser is on the fan speed reduces drastically.Also, What is the reason for this?
Answer» In a house, the connections are such that a bulb is in parallel with the fan and geyser. The resistances offered by them being 10Ω, 10Ω and 220Ω. The voltage for the house is 220V. Find the power consumed by the geyser because every time the geyser is on the fan speed reduces drastically.Also, What is the reason for this?

Discussion

4.	What is ohms law?
Answer» What is ohms law?

Discussion

5.	Consider a simple circuit containing a battery and three identical incandescent bulbs A, B and C. Bulb A is wired in parallel with bulb B and this combination is wired in series with bulb C. What would happen to the brightness of the other two bulbs if bulb A were to burn out?
Answer» Consider a simple circuit containing a battery and three identical incandescent bulbs A, B and C. Bulb A is wired in parallel with bulb B and this combination is wired in series with bulb C. What would happen to the brightness of the other two bulbs if bulb A were to burn out?

Discussion

6.	Identify the processes that could be A, B and C with respect to the following figure.
Answer» Identify the processes that could be A, B and C with respect to the following figure.

Discussion

7.	Which of the following is the most suitable instrument for measuring length of a curved line?
Answer» Which of the following is the most suitable instrument for measuring length of a curved line?

Discussion

8.	Show analytically that an object placed between the pole and focus of a concave mirror produces a virtual and enlarged image.
Answer» Show analytically that an object placed between the pole and focus of a concave mirror produces a virtual and enlarged image.

Discussion

9.	If a substance has 58 electrons and 53 protons then find the net charge on the substance.
Answer» If a substance has 58 electrons and 53 protons then find the net charge on the substance.

Discussion

10.	At a particular temperature, the ratio of molar conductance to specific conductance of 0.01 M NaCl solution is:
Answer» At a particular temperature, the ratio of molar conductance to specific conductance of 0.01 M NaCl solution is:

Discussion

11.	The current produced by a generator with slip rings will have which of the following current variations with time as output ?
Answer» The current produced by a generator with slip rings will have which of the following current variations with time as output ?

Discussion

12.	For the figure given below, find the effective potential difference when the batteries are connected in series.
Answer» For the figure given below, find the effective potential difference when the batteries are connected in series.

Discussion

13.	Transparent layer covering the exposed part of the eye. Enter 1 word only.__
Answer» Transparent layer covering the exposed part of the eye. Enter 1 word only. __

13.

Transparent layer covering the exposed part of the eye. Enter 1 word only.__

Answer»

Transparent layer covering the exposed part of the eye.

Enter 1 word only.

__

Discussion

14.	what is a ferromagnet substance?
Answer» what is a ferromagnet substance?

Discussion

15.	Properties of magnetic effect explin
Answer» Properties of magnetic effect explin

Discussion

16.	Explain the construction and working of a box type solar cooker.
Answer» Explain the construction and working of a box type solar cooker.

Discussion

17.	Which is the component that breaks the electric circuit in case of excess current?
Answer» Which is the component that breaks the electric circuit in case of excess current?

Discussion

18.	Define the term specific latent heat of fusion of ice. State its S.I. unit.
Answer» Define the term specific latent heat of fusion of ice. State its S.I. unit.

18.

Define the term specific latent heat of fusion of ice. State its S.I. unit.

Answer»

Define the term specific latent heat of fusion of ice. State its S.I. unit.

Discussion

19.	Explain how to read the following message which was found on some blotting paper :
Answer» Explain how to read the following message which was found on some blotting paper :

Discussion

20.	If the intensities of two sounds are in ratio 9:4, what is the ratio of their amplitude?
Answer» If the intensities of two sounds are in ratio $9 : 4$ , what is the ratio of their amplitude?

Discussion

21.	Look at the figure given below and answer the question based on it. 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. The deflection of the compass needle decreases as the compass is moved away from the copper wire. This tells us that?
Answer» Look at the figure given below and answer the question based on it. 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. The deflection of the compass needle decreases as the compass is moved away from the copper wire. This tells us that?

21.

Look at the figure given below and answer the question based on it. 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. The deflection of the compass needle decreases as the compass is moved away from the copper wire. This tells us that?

Answer»

Look at the figure given below and answer the question based on it.

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.

The deflection of the compass needle decreases as the compass is moved away from the copper wire. This tells us that?

Discussion

22.	Calculate the value of centripetal acceleration for a mass of 10 kg performing a circular motion with 4 m/s with the radius 0.5 m.
Answer» Calculate the value of centripetal acceleration for a mass of $10 k g$ performing a circular motion with $4 m / s$ with the radius $0.5 m$ .

Discussion

23.	How does the two sounds of same loudness and same pitch produced by different instruments differ ? Draw diagrams to illustrate your answer.
Answer» How does the two sounds of same loudness and same pitch produced by different instruments differ ? Draw diagrams to illustrate your answer.

Discussion

24.	Which colour light has the maximum wavelength?
Answer» Which colour light has the maximum wavelength?

Discussion

25.	A student while studying the force experienced by a current carrying conductor in a magnetic field records the following observations: a) The force experienced by the conductor increases as the current is increased. b) The force experienced by the conductor decreases as the strength of the magnetic field is increased. Which of the two observations is correct, amongst a) and b) and why?
Answer» A student while studying the force experienced by a current carrying conductor in a magnetic field records the following observations: a) The force experienced by the conductor increases as the current is increased. b) The force experienced by the conductor decreases as the strength of the magnetic field is increased. Which of the two observations is correct, amongst a) and b) and why?

25.

A student while studying the force experienced by a current carrying conductor in a magnetic field records the following observations: a) The force experienced by the conductor increases as the current is increased. b) The force experienced by the conductor decreases as the strength of the magnetic field is increased. Which of the two observations is correct, amongst a) and b) and why?

Answer»

A student while studying the force experienced by a current carrying conductor in a magnetic field records the following observations:

a) The force experienced by the conductor increases as the current is increased.

b) The force experienced by the conductor decreases as the strength of the magnetic field is increased.

Which of the two observations is correct, amongst a) and b) and why?

Discussion

26.	The stars twinkle but the planets do not twinkle at night because : (a) the stars are small but the planets are large (b) the stars are very large but planets are small (c) the stars are much nearer but planets are far off (d) the stars are far off but planets are nearer to earth
Answer» The stars twinkle but the planets do not twinkle at night because : (a) the stars are small but the planets are large (b) the stars are very large but planets are small (c) the stars are much nearer but planets are far off (d) the stars are far off but planets are nearer to earth

Discussion

27.	A stationary source producing a sound of frequency 90 Hz. What will be the frequency heard by the listener at a distance of 50 m in rest?90
Answer» A stationary source producing a sound of frequency 90 Hz. What will be the frequency heard by the listener at a distance of 50 m in rest? 90

Discussion

28.	How does the wave pattern of a loud note differ from a soft note ? Draw a diagram.
Answer» How does the wave pattern of a loud note differ from a soft note ? Draw a diagram.

Discussion

29.	A stone tied to a string when whirled in a vertical circular loop___
Answer» A stone tied to a string when whirled in a vertical circular loop___

Discussion

30.	If specific heat of a substance is infinite, it means
Answer» If specific heat of a substance is infinite, it means

30.

If specific heat of a substance is infinite, it means

Answer»

If specific heat of a substance is infinite, it means

Discussion

31.	The refractive index of a prism is 2.This prism can have a maximum refracting angle of
Answer» The refractive index of a prism is 2.This prism can have a maximum refracting angle of

Discussion

32.	State the order of specific resistance of (i) a metal, (ii) a semiconductor, and (iii) an insulator.
Answer» State the order of specific resistance of (i) a metal, (ii) a semiconductor, and (iii) an insulator.

Discussion

33.	Which of the following ray diagram is correct?
Answer» Which of the following ray diagram is correct?

Discussion

34.	Hydrogen is a good fuel even then it is not used as a domestic fuel. Why?
Answer» Hydrogen is a good fuel even then it is not used as a domestic fuel. Why?

Discussion

35.	Are the light in our house in service
Answer» Are the light in our house in service

Discussion

36.	In a convex lens, where is the image formed, when an object is placed at 2F?
Answer» In a convex lens, where is the image formed, when an object is placed at 2F?

Discussion

37.	The angle between an incident ray and the plane mirror is 30∘. The total angle between the incident ray and reflected ray will be : (a) 30∘ (b) 60∘ (c) 90∘ (d) 120∘
Answer» The angle between an incident ray and the plane mirror is $30^{\circ}$ . The total angle between the incident ray and reflected ray will be : (a) $30^{\circ}$ (b) $60^{\circ}$ (c) $90^{\circ}$ (d) $120^{\circ}$

Discussion

38.	If 3 parallel rays fall on an irregular reflecting surface then how many reflected rays do we get?
Answer» If 3 parallel rays fall on an irregular reflecting surface then how many reflected rays do we get?

Discussion

39.	When the loop becomes perpendicular to the magnetic field, no current flows through it momentarily as the brush loses contact with the split rings. Then why doesn't the motor stop in this position? IS IT DUE TO THE MOMENTUM PRESENT IN THE LOOP??
Answer» When the loop becomes perpendicular to the magnetic field, no current flows through it momentarily as the brush loses contact with the split rings. Then why doesn't the motor stop in this position? IS IT DUE TO THE MOMENTUM PRESENT IN THE LOOP??

Discussion

40.	Three different circuits (I, II and III) are constructed using identical batteries and resistors of R and 2R ohm. What can be said about current I in arm AB of each circuit?
Answer» Three different circuits (I, II and III) are constructed using identical batteries and resistors of R and 2R ohm. What can be said about current I in arm AB of each circuit?

40.

Three different circuits (I, II and III) are constructed using identical batteries and resistors of R and 2R ohm. What can be said about current I in arm AB of each circuit?

Answer»

Three different circuits (I, II and III) are constructed using identical batteries and resistors of R and 2R ohm.

What can be said about current I in arm AB of each circuit?

Discussion

41.	Find the work done to transfer 1019 electrons from point A to B which are maintained at a potential difference of 5 volts.
Answer» Find the work done to transfer $10^{19}$ electrons from point A to B which are maintained at a potential difference of 5 volts.

Discussion

42.	In the circuit shown below: The potential difference across the 3Ω resistor is : (a)19V(b)12(c)1V(d)2V
Answer» In the circuit shown below: The potential difference across the $3 Ω$ resistor is : $(a) \frac{1}{9} V (b) \frac{1}{2} (c) 1 V (d) 2 V$

Discussion

43.	A p.d. of 6 V is applied to two resistors of 3Ω and 6Ω connected in parallel, calculate : (a) the combined resistance (b) the current flowing in the main circuit (c) the current flowing in the 3Ω resistor.
Answer» A p.d. of 6 V is applied to two resistors of $3 Ω$ and $6 Ω$ connected in parallel, calculate : (a) the combined resistance (b) the current flowing in the main circuit (c) the current flowing in the $3 Ω$ resistor.

43.

A p.d. of 6 V is applied to two resistors of 3Ω and 6Ω connected in parallel, calculate : (a) the combined resistance (b) the current flowing in the main circuit (c) the current flowing in the 3Ω resistor.

Answer»

A p.d. of 6 V is applied to two resistors of $3 Ω$ and $6 Ω$ connected in parallel, calculate :

(a) the combined resistance
(b) the current flowing in the main circuit
(c) the current flowing in the $3 Ω$ resistor.

Discussion

44.	In which of the following stages of power distribution a step-down transformer is used?
Answer» In which of the following stages of power distribution a step-down transformer is used?

Discussion

45.	Electrical power P is given by the expression P=(Q×V)÷time. (a) What do th symbols Q and V represent? (b) Expresss the power P in terms of current and resistance explaining the meaning of symbols used there in.
Answer» Electrical power P is given by the expression $P = (Q \times V) \div t i m e .$ (a) What do th symbols Q and V represent? (b) Expresss the power P in terms of current and resistance explaining the meaning of symbols used there in.

Discussion

46.	Q15. Consider the following statements about Sophia: 1. Sophia is a social humanoid robot. 2. It is the first non-human to be given any United Nations title. Which of the above statements are correct?
Answer» Q15. Consider the following statements about Sophia: 1. Sophia is a social humanoid robot. 2. It is the first non-human to be given any United Nations title. Which of the above statements are correct?

46.

Q15. Consider the following statements about Sophia: 1. Sophia is a social humanoid robot. 2. It is the first non-human to be given any United Nations title. Which of the above statements are correct?

Answer»

Q15. Consider the following statements about Sophia:

1. Sophia is a social humanoid robot.

2. It is the first non-human to be given any United Nations title.

Which of the above statements are correct?

Discussion

47.	A dichromatic light of wavelength 5600 ∘A and 6300 ∘A pass through a prism of crown glass.Then:
Answer» A dichromatic light of wavelength 5600 $\circ A$ and 6300 $\circ A$ pass through a prism of crown glass.Then:

Discussion

48.	Explain the working of AC and DC generator.
Answer» Explain the working of AC and DC generator.

Discussion

49.	A person sitting on a bench hears the sound of a truck moving away at a speed of 10 m s−1. If the frequency of the sound produced by the truck is 300 Hz, what is the percentage change in the frequency of the sound (in seconds) perceived by the person? (velocity of sound in air ≈350 m s−1)
Answer» A person sitting on a bench hears the sound of a truck moving away at a speed of $10 {m s}^{- 1}$ . If the frequency of the sound produced by the truck is $300 Hz$ , what is the percentage change in the frequency of the sound (in seconds) perceived by the person? (velocity of sound in air $\approx 350 {m s}^{- 1}$ )

Discussion

50.	In which type of disability the person will have a shorter far point?
Answer» In which type of disability the person will have a shorter far point?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

(a) Solar cells are used to provide the electric current to charge the batteries of a car driven by an electric motor. Describe the energy changes which take place. (b) What differences would you expect in the charging of car batteries (i) on bright sunlight (ii) on a cloudy day (iii) at night ?

A body of mass 'm' moving with velocity 'v' collides head on elastically with another body of mass '2m' which was initially at rest. The ratio of K.E. of colliding body of mass 'm' before and after collision would be

What is ohms law?

Consider a simple circuit containing a battery and three identical incandescent bulbs A, B and C. Bulb A is wired in parallel with bulb B and this combination is wired in series with bulb C. What would happen to the brightness of the other two bulbs if bulb A were to burn out?

Identify the processes that could be A, B and C with respect to the following figure. ​​​​​​​

Which of the following is the most suitable instrument for measuring length of a curved line?

Show analytically that an object placed between the pole and focus of a concave mirror produces a virtual and enlarged image.

If a substance has 58 electrons and 53 protons then find the net charge on the substance.

At a particular temperature, the ratio of molar conductance to specific conductance of 0.01 M NaCl solution is:

The current produced by a generator with slip rings will have which of the following current variations with time as output ?

For the figure given below, find the effective potential difference when the batteries are connected in series.

Transparent layer covering the exposed part of the eye. Enter 1 word only.__

what is a ferromagnet substance?

Properties of magnetic effect explin

Explain the construction and working of a box type solar cooker.

Which is the component that breaks the electric circuit in case of excess current?

Define the term specific latent heat of fusion of ice. State its S.I. unit.

Explain how to read the following message which was found on some blotting paper :

If the intensities of two sounds are in ratio 9:4, what is the ratio of their amplitude?

Calculate the value of centripetal acceleration for a mass of 10 kg performing a circular motion with 4 m/s with the radius 0.5 m.

How does the two sounds of same loudness and same pitch produced by different instruments differ ? Draw diagrams to illustrate your answer.

Which colour light has the maximum wavelength?

The stars twinkle but the planets do not twinkle at night because : (a) the stars are small but the planets are large (b) the stars are very large but planets are small (c) the stars are much nearer but planets are far off (d) the stars are far off but planets are nearer to earth

A stationary source producing a sound of frequency 90 Hz. What will be the frequency heard by the listener at a distance of 50 m in rest?90

How does the wave pattern of a loud note differ from a soft note ? Draw a diagram.

A stone tied to a string when whirled in a vertical circular loop___

If specific heat of a substance is infinite, it means

The refractive index of a prism is 2.This prism can have a maximum refracting angle of

State the order of specific resistance of (i) a metal, (ii) a semiconductor, and (iii) an insulator.

Which of the following ray diagram is correct?

Hydrogen is a good fuel even then it is not used as a domestic fuel. Why?

Are the light in our house in service

In a convex lens, where is the image formed, when an object is placed at 2F?

The angle between an incident ray and the plane mirror is 30∘. The total angle between the incident ray and reflected ray will be : (a) 30∘ (b) 60∘ (c) 90∘ (d) 120∘

If 3 parallel rays fall on an irregular reflecting surface then how many reflected rays do we get?

When the loop becomes perpendicular to the magnetic field, no current flows through it momentarily as the brush loses contact with the split rings. Then why doesn't the motor stop in this position? IS IT DUE TO THE MOMENTUM PRESENT IN THE LOOP??

Three different circuits (I, II and III) are constructed using identical batteries and resistors of R and 2R ohm. What can be said about current I in arm AB of each circuit?

Find the work done to transfer 1019 electrons from point A to B which are maintained at a potential difference of 5 volts.

In the circuit shown below: The potential difference across the 3Ω resistor is : (a)19V(b)12(c)1V(d)2V

A p.d. of 6 V is applied to two resistors of 3Ω and 6Ω connected in parallel, calculate : (a) the combined resistance (b) the current flowing in the main circuit (c) the current flowing in the 3Ω resistor.

In which of the following stages of power distribution a step-down transformer is used?

Electrical power P is given by the expression P=(Q×V)÷time. (a) What do th symbols Q and V represent? (b) Expresss the power P in terms of current and resistance explaining the meaning of symbols used there in.

Q15. Consider the following statements about Sophia: 1. Sophia is a social humanoid robot. 2. It is the first non-human to be given any United Nations title. Which of the above statements are correct?

A dichromatic light of wavelength 5600 ∘A and 6300 ∘A pass through a prism of crown glass.Then:

Explain the working of AC and DC generator.

A person sitting on a bench hears the sound of a truck moving away at a speed of 10 m s−1. If the frequency of the sound produced by the truck is 300 Hz, what is the percentage change in the frequency of the sound (in seconds) perceived by the person? (velocity of sound in air ≈350 m s−1)

In which type of disability the person will have a shorter far point?

Identify the processes that could be A, B and C with respect to the following figure.