16569 + Interview Questions in Physics

1.	A body of mass 2 kg is dropped from a building of height 5m. The maximum kinetic energy body can attain is
Answer» A body of mass 2 kg is dropped from a building of height 5m. The maximum kinetic energy body can attain is

Discussion

2.	What is successive magnification
Answer» What is successive magnification

Discussion

3.	Transformers:
Answer» Transformers:

Discussion

4.	With the increase in population, the energy demand has
Answer» With the increase in population, the energy demand has

Discussion

5.	Which of the following is the example of human interference with nature, has upset the biological equilibrium?
Answer» Which of the following is the example of human interference with nature, has upset the biological equilibrium?

Discussion

6.	Volt per ampere is the other name of ?
Answer» Volt per ampere is the other name of ?

Discussion

7.	With respect to a lead-acid accumulator, which of the following is true?
Answer» With respect to a lead-acid accumulator, which of the following is true?

Discussion

8.	Consider the following statements: Statement 1: Cryogenics involves temperatures below - 80∘C. Statement 2: Nitrogen and helium gases are used to attain low temperatures in cryogenics.
Answer» Consider the following statements: Statement 1: Cryogenics involves temperatures below - $80^{\circ}$ C. Statement 2: Nitrogen and helium gases are used to attain low temperatures in cryogenics.

8.

Consider the following statements: Statement 1: Cryogenics involves temperatures below - 80∘C. Statement 2: Nitrogen and helium gases are used to attain low temperatures in cryogenics.

Answer»

Consider the following statements:

Statement 1: Cryogenics involves temperatures below - $80^{\circ}$ C.

Statement 2: Nitrogen and helium gases are used to attain low temperatures in cryogenics.

Discussion

9.	Arjun decided to extend Oersted's experiment. He took two conducting wires and attached them to the battery so that current was flowing in the same direction in both of them. He noticed that wires were getting attracted towards each other. What could have been the cause of this attraction?
Answer» Arjun decided to extend Oersted's experiment. He took two conducting wires and attached them to the battery so that current was flowing in the same direction in both of them. He noticed that wires were getting attracted towards each other. What could have been the cause of this attraction?

Discussion

10.	Which of the following is not the attribute of a good source of energy?
Answer» Which of the following is not the attribute of a good source of energy?

Discussion

11.	A short-sighted person has a near point of 15 cm and a far point of 40 cm. (a) Can he see clearly an object at a distance of : (i) 5 cm ? (ii) 25 cm ? (iii) 50 cm ? (b) To see clearly an object at infinity, what kind of spectacle lenses does he need ?
Answer» A short-sighted person has a near point of 15 cm and a far point of 40 cm. (a) Can he see clearly an object at a distance of : (i) 5 cm ? (ii) 25 cm ? (iii) 50 cm ? (b) To see clearly an object at infinity, what kind of spectacle lenses does he need ?

Discussion

12.	Which fossil fuel is conserved: (a) when we save on electricity? (b) when we use bicycle for covering short distances instead of a motorbike?
Answer» Which fossil fuel is conserved: (a) when we save on electricity? (b) when we use bicycle for covering short distances instead of a motorbike?

Discussion

13.	The diagram shows a pulley system which lifts a load of 1000N against gravity through a height 2m. Calculate the displacement of the effort and the efficiency of the system is 100% then calculate the tension force in the tackle.
Answer» The diagram shows a pulley system which lifts a load of 1000N against gravity through a height 2m. Calculate the displacement of the effort and the efficiency of the system is 100% then calculate the tension force in the tackle.

13.

The diagram shows a pulley system which lifts a load of 1000N against gravity through a height 2m. Calculate the displacement of the effort and the efficiency of the system is 100% then calculate the tension force in the tackle.

Answer»

The diagram shows a pulley system which lifts a load of 1000N against gravity through a height 2m. Calculate the displacement of the effort and the efficiency of the system is 100% then calculate the tension force in the tackle.

Discussion

14.	What is the condition of a total internal reflection?
Answer» What is the condition of a total internal reflection?

Discussion

15.	Which of the following phenomena takes place in a fuse that results in the breaking of the electric circuit?
Answer» Which of the following phenomena takes place in a fuse that results in the breaking of the electric circuit?

Discussion

16.	The frequency of second’s pendulum is
Answer» The frequency of second’s pendulum is

Discussion

17.	A pump is rated at 100 HP. Calculate the force it applies if it lifts water at 2ms-1.
Answer» A pump is rated at 100 HP. Calculate the force it applies if it lifts water at 2ms^-1.

Discussion

18.	State (i) two dissimilarities, and (ii) two similarities between a D.C motor and an A.C generator.
Answer» State (i) two dissimilarities, and (ii) two similarities between a D.C motor and an A.C generator.

Discussion

19.	State Fleming's right hand rule.
Answer» State Fleming's right hand rule.

Discussion

20.	Match the formulae with their names
Answer» Match the formulae with their names

Discussion

21.	Why does a driver prefer to use a convex mirror as a rear-view mirror in a vehicle ?
Answer» Why does a driver prefer to use a convex mirror as a rear-view mirror in a vehicle ?

Discussion

22.	The one having maximum protective power (G.No. = Gold number)
Answer» The one having maximum protective power (G.No. = Gold number)

Discussion

23.	I have a glass of water at room temperature, kept inside a closed room. I get a hot mug of coffee which is kept on another table. As the coffee cools down, what happens to the temperature of the glass of water?
Answer» I have a glass of water at room temperature, kept inside a closed room. I get a hot mug of coffee which is kept on another table. As the coffee cools down, what happens to the temperature of the glass of water?

Discussion

24.	State the cause of increase of green house effect.
Answer» State the cause of increase of green house effect.

Discussion

25.	Look at the figure given below and answer question based on that. Iron filings are sprinkled on a cardboard perpendicular to which a current carrying copper wire runs. A compass is placed at point 'P'. The other components of the circuit have their usual meanings If the polarity of the battery in the circuit is changed then__
Answer» Look at the figure given below and answer question based on that. Iron filings are sprinkled on a cardboard perpendicular to which a current carrying copper wire runs. A compass is placed at point 'P'. The other components of the circuit have their usual meanings If the polarity of the battery in the circuit is changed then__

25.

Look at the figure given below and answer question based on that. Iron filings are sprinkled on a cardboard perpendicular to which a current carrying copper wire runs. A compass is placed at point 'P'. The other components of the circuit have their usual meanings If the polarity of the battery in the circuit is changed then__

Answer»

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

Iron filings are sprinkled on a cardboard perpendicular to which a current carrying copper wire runs. A compass is placed at point 'P'. The other components of the circuit have their usual meanings

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

Discussion

26.	A man standing in front of a special mirror finds his image having a very small head, a fat body and legs of normal size. What is the shape of : (a) top part of the mirror ? (b) middle part of the mirror ? (c) bottom part of the mirror ? Give reasons for your choice.
Answer» A man standing in front of a special mirror finds his image having a very small head, a fat body and legs of normal size. What is the shape of : (a) top part of the mirror ? (b) middle part of the mirror ? (c) bottom part of the mirror ? Give reasons for your choice.

Discussion

27.	The absolute refractive index of the diamond is 2.1. What is the velocity of light in a diamond?
Answer» The absolute refractive index of the diamond is 2.1. What is the velocity of light in a diamond?

Discussion

28.	Which way does the wire in the diagram below tend to move ?
Answer» Which way does the wire in the diagram below tend to move ?

28.

Which way does the wire in the diagram below tend to move ?

Answer»

Which way does the wire in the diagram below tend to move ?

Discussion

29.	Name two factors which can be used to find whether river water has been contaminated.
Answer» Name two factors which can be used to find whether river water has been contaminated.

Discussion

30.	Question 83 (i) In her Science class, Jyoti learned that the atomic weight of Helium is 4.0030; of Hydrogen is 1.0080; and of Oxygen is 16.0000. find the difference between the atomic weights of : (a) Oxygen and Hydrogen
Answer» Question 83 (i) In her Science class, Jyoti learned that the atomic weight of Helium is 4.0030; of Hydrogen is 1.0080; and of Oxygen is 16.0000. find the difference between the atomic weights of : (a) Oxygen and Hydrogen

30.

Question 83 (i) In her Science class, Jyoti learned that the atomic weight of Helium is 4.0030; of Hydrogen is 1.0080; and of Oxygen is 16.0000. find the difference between the atomic weights of : (a) Oxygen and Hydrogen

Answer»

Question 83 (i)

In her Science class, Jyoti learned that the atomic weight of Helium is 4.0030; of Hydrogen is 1.0080; and of Oxygen is 16.0000. find the difference between the atomic weights of :
(a) Oxygen and Hydrogen

Discussion

31.	Draw the magnetic field lines representing uniform magnetic field. [2 MARKS]
Answer» Draw the magnetic field lines representing uniform magnetic field. [2 MARKS]

Discussion

32.	Question 2 In the following example, try to identify the number of times the velocity of the ball changes: "A football player kicks a football to another player of his team who kicks the football towards the goal. The goalkeeper of the opposite team collects the football and kicks it towards a player of his own team". Also identify the agent supplying the force in each case.
Answer» Question 2 In the following example, try to identify the number of times the velocity of the ball changes: "A football player kicks a football to another player of his team who kicks the football towards the goal. The goalkeeper of the opposite team collects the football and kicks it towards a player of his own team". Also identify the agent supplying the force in each case.

Discussion

33.	If the refractive index of a dense flint glass is 1.65 and of alcohol is 1.36 with respect to air, then the refractive index of the dense flint glass with respect to alcohol is
Answer» If the refractive index of a dense flint glass is $1.65$ and of alcohol is $1.36$ with respect to air, then the refractive index of the dense flint glass with respect to alcohol is

Discussion

34.	The I-V characteristic of an LED is
Answer» The I-V characteristic of an LED is

Discussion

35.	When is heated, it decomposes into . If some is added, the reaction goes much faster because [CPMT 1971,76,80,94]
Answer» When is heated, it decomposes into . If some is added, the reaction goes much faster because [CPMT 1971,76,80,94]

35.

When is heated, it decomposes into . If some is added, the reaction goes much faster because [CPMT 1971,76,80,94]

Answer»

When is heated, it decomposes into . If some is added, the reaction goes much faster because

[CPMT 1971,76,80,94]

Discussion

36.	The coefficient of linear expansion(α) of a solid is equal to ____.
Answer» The coefficient of linear expansion( $α$ ) of a solid is equal to ____.

Discussion

37.	Option 25 Why does a magnetic compass needle pointing North and South in the absence of a nearby magnet get deflected when a bar magnet or a current carrying loop is brought near it. Describe some salient features of magnetic lines of field concept.
Answer» Option 25 Why does a magnetic compass needle pointing North and South in the absence of a nearby magnet get deflected when a bar magnet or a current carrying loop is brought near it. Describe some salient features of magnetic lines of field concept.

Discussion

38.	An illuminated object lies at a distance 1.0 m from a screen. A convex lens is used to form the image of the object on a screen placed at a distance 75 cm from the lens. Find : 1) the focal length of lens 2) the magnification.
Answer» An illuminated object lies at a distance 1.0 m from a screen. A convex lens is used to form the image of the object on a screen placed at a distance 75 cm from the lens. Find : 1) the focal length of lens 2) the magnification.

Discussion

39.	The same current flows through all the resistances if they are connected in __.
Answer» The same current flows through all the resistances if they are connected in __.

Discussion

40.	If a light ray does not undergo refraction at boundary of two media then angle of inference is?
Answer» If a light ray does not undergo refraction at boundary of two media then angle of inference is?

Discussion

41.	Why does air conduct electricity while lightning even if it is a very bad conductor of electricity ?
Answer» Why does air conduct electricity while lightning even if it is a very bad conductor of electricity ?

Discussion

42.	Suppose the ammeter or the voltmeter that you are using in the circuit do not have positive and negative terminal markings,how will you use such an ammeter or voltmeter in the circuit
Answer» Suppose the ammeter or the voltmeter that you are using in the circuit do not have positive and negative terminal markings,how will you use such an ammeter or voltmeter in the circuit

Discussion

43.	Why is it desirable to transmit high votage and low current during the transmission of power?
Answer» Why is it desirable to transmit high votage and low current during the transmission of power?

Discussion

44.	How does potential difference (v) across a resistor depend on current passing through it ? What is nature of I-V graph obtained
Answer» How does potential difference (v) across a resistor depend on current passing through it ? What is nature of I-V graph obtained

Discussion

45.	why are we not using joule as commercial unit ?
Answer» why are we not using joule as commercial unit ?

Discussion

46.	If I keep the north pole of a bar magnet facing a conducting loop and move it towards the loop, I find a current flowing through it, let's say in the clockwise direction. If I want a current to flow in the counter clockwise direction using the same bar magnet, I should :
Answer» If I keep the north pole of a bar magnet facing a conducting loop and move it towards the loop, I find a current flowing through it, let's say in the clockwise direction. If I want a current to flow in the counter clockwise direction using the same bar magnet, I should :

Discussion

47.	A current carrying conductor is placed from West to East direction. What will be the direction of the force due to the earth's magnetic field?
Answer» A current carrying conductor is placed from West to East direction. What will be the direction of the force due to the earth's magnetic field?

Discussion

48.	An ideal gas enclosed in a vessel subjected to heat, What happens to the gases?
Answer» An ideal gas enclosed in a vessel subjected to heat, What happens to the gases?

Discussion

49.	Can absolute refractive index be less than 1? justify.
Answer» Can absolute refractive index be less than 1? justify.

Discussion

50.	A certain sound has a frequency of 256 Hz and wavelength of 1. 3 m. calculate the speed with which this sound Travels .what difference would be felt by a listner between this sound and another sound travelling at the same speed but of wavelength 2. 6 m?
Answer» A certain sound has a frequency of 256 Hz and wavelength of 1. 3 m. calculate the speed with which this sound Travels .what difference would be felt by a listner between this sound and another sound travelling at the same speed but of wavelength 2. 6 m?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A body of mass 2 kg is dropped from a building of height 5m. The maximum kinetic energy body can attain is

What is successive magnification

Transformers:

With the increase in population, the energy demand has

Which of the following is the example of human interference with nature, has upset the biological equilibrium?

Volt per ampere is the other name of ?

With respect to a lead-acid accumulator, which of the following is true?

Consider the following statements: Statement 1: Cryogenics involves temperatures below - 80∘C. Statement 2: Nitrogen and helium gases are used to attain low temperatures in cryogenics.

Arjun decided to extend Oersted's experiment. He took two conducting wires and attached them to the battery so that current was flowing in the same direction in both of them. He noticed that wires were getting attracted towards each other. What could have been the cause of this attraction?

Which of the following is not the attribute of a good source of energy?

A short-sighted person has a near point of 15 cm and a far point of 40 cm. (a) Can he see clearly an object at a distance of : (i) 5 cm ? (ii) 25 cm ? (iii) 50 cm ? (b) To see clearly an object at infinity, what kind of spectacle lenses does he need ?

Which fossil fuel is conserved: (a) when we save on electricity? (b) when we use bicycle for covering short distances instead of a motorbike?

The diagram shows a pulley system which lifts a load of 1000N against gravity through a height 2m. Calculate the displacement of the effort and the efficiency of the system is 100% then calculate the tension force in the tackle.

What is the condition of a total internal reflection?

Which of the following phenomena takes place in a fuse that results in the breaking of the electric circuit?

The frequency of second’s pendulum is

A pump is rated at 100 HP. Calculate the force it applies if it lifts water at 2ms-1.

State (i) two dissimilarities, and (ii) two similarities between a D.C motor and an A.C generator.

State Fleming's right hand rule.

Match the formulae with their names

Why does a driver prefer to use a convex mirror as a rear-view mirror in a vehicle ?

The one having maximum protective power (G.No. = Gold number)

I have a glass of water at room temperature, kept inside a closed room. I get a hot mug of coffee which is kept on another table. As the coffee cools down, what happens to the temperature of the glass of water?

State the cause of increase of green house effect.

A man standing in front of a special mirror finds his image having a very small head, a fat body and legs of normal size. What is the shape of : (a) top part of the mirror ? (b) middle part of the mirror ? (c) bottom part of the mirror ? Give reasons for your choice.

The absolute refractive index of the diamond is 2.1. What is the velocity of light in a diamond?

Which way does the wire in the diagram below tend to move ?

Name two factors which can be used to find whether river water has been contaminated.

Question 83 (i) In her Science class, Jyoti learned that the atomic weight of Helium is 4.0030; of Hydrogen is 1.0080; and of Oxygen is 16.0000. find the difference between the atomic weights of : (a) Oxygen and Hydrogen

Draw the magnetic field lines representing uniform magnetic field. [2 MARKS]

If the refractive index of a dense flint glass is 1.65 and of alcohol is 1.36 with respect to air, then the refractive index of the dense flint glass with respect to alcohol is

The I-V characteristic of an LED is

When is heated, it decomposes into . If some is added, the reaction goes much faster because [CPMT 1971,76,80,94]

The coefficient of linear expansion(α) of a solid is equal to ____.

Option 25 Why does a magnetic compass needle pointing North and South in the absence of a nearby magnet get deflected when a bar magnet or a current carrying loop is brought near it. Describe some salient features of magnetic lines of field concept.

An illuminated object lies at a distance 1.0 m from a screen. A convex lens is used to form the image of the object on a screen placed at a distance 75 cm from the lens. Find : 1) the focal length of lens 2) the magnification.

The same current flows through all the resistances if they are connected in __.

If a light ray does not undergo refraction at boundary of two media then angle of inference is?

Why does air conduct electricity while lightning even if it is a very bad conductor of electricity ?

Suppose the ammeter or the voltmeter that you are using in the circuit do not have positive and negative terminal markings,how will you use such an ammeter or voltmeter in the circuit

Why is it desirable to transmit high votage and low current during the transmission of power?

How does potential difference (v) across a resistor depend on current passing through it ? What is nature of I-V graph obtained

why are we not using joule as commercial unit ?

If I keep the north pole of a bar magnet facing a conducting loop and move it towards the loop, I find a current flowing through it, let's say in the clockwise direction. If I want a current to flow in the counter clockwise direction using the same bar magnet, I should :

A current carrying conductor is placed from West to East direction. What will be the direction of the force due to the earth's magnetic field?

An ideal gas enclosed in a vessel subjected to heat, What happens to the gases?

Can absolute refractive index be less than 1? justify.

A certain sound has a frequency of 256 Hz and wavelength of 1. 3 m. calculate the speed with which this sound Travels .what difference would be felt by a listner between this sound and another sound travelling at the same speed but of wavelength 2. 6 m?