16569 + Interview Questions in Physics

1.	A doctor has prescribed a corrective lens of power, -1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging ?
Answer» A doctor has prescribed a corrective lens of power, -1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging ?

Discussion

2.	Tropic of cancer 2312∘N does not pass through which state of India?
Answer» Tropic of cancer $23 {\frac{1}{2}}^{\circ} N$ does not pass through which state of India?

Discussion

3.	Which among the following is not true for a plane mirror?
Answer» Which among the following is not true for a plane mirror?

Discussion

4.	Q23. Consider the following statements about India Energy Security Scenarios: 1. The tool aims to explore a range of potential future energy scenarios for India, for diverse energy demand and supply sectors leading up to 2047. 2. BEEE launched the second version of the India Energy Security Scenarios 2047 calculator (IESS 2047). Which of the above statements are correct?
Answer» Q23. Consider the following statements about India Energy Security Scenarios: 1. The tool aims to explore a range of potential future energy scenarios for India, for diverse energy demand and supply sectors leading up to 2047. 2. BEEE launched the second version of the India Energy Security Scenarios 2047 calculator (IESS 2047). Which of the above statements are correct?

4.

Q23. Consider the following statements about India Energy Security Scenarios: 1. The tool aims to explore a range of potential future energy scenarios for India, for diverse energy demand and supply sectors leading up to 2047. 2. BEEE launched the second version of the India Energy Security Scenarios 2047 calculator (IESS 2047). Which of the above statements are correct?

Answer»

Q23. Consider the following statements about India Energy Security Scenarios:

1. The tool aims to explore a range of potential future energy scenarios for India, for diverse energy demand and supply sectors leading up to 2047.

2. BEEE launched the second version of the India Energy Security Scenarios 2047 calculator (IESS 2047).

Which of the above statements are correct?

Discussion

5.	40 g of water at 600C is poured into a vessel containing 50 g of water at 200C. The final temperature recorded is 300C. Calculate the thermal capacity of the vessel. (Take specific heat capacity of water as 4.2 Jg−10C−1).
Answer» 40 g of water at 60 $^{0} C$ is poured into a vessel containing 50 g of water at 20 $^{0} C$ . The final temperature recorded is 30 $^{0} C$ . Calculate the thermal capacity of the vessel. (Take specific heat capacity of water as 4.2 $J g {- 1}^{0} C^{- 1}$ ).

Discussion

6.	A current of 2 A is passed through a coil of resistance 75Ω for 2 minutes. (a) How much heat energy is produced? (b) How much charge is passed through the resistance?
Answer» A current of 2 A is passed through a coil of resistance $75 Ω$ for 2 minutes. (a) How much heat energy is produced? (b) How much charge is passed through the resistance?

6.

A current of 2 A is passed through a coil of resistance 75Ω for 2 minutes. (a) How much heat energy is produced? (b) How much charge is passed through the resistance?

Answer»

A current of 2 A is passed through a coil of resistance $75 Ω$ for 2 minutes.

(a) How much heat energy is produced?

(b) How much charge is passed through the resistance?

Discussion

7.	An electric heater is rated 1000 W-200 V. The current flowing through the heater is:
Answer» An electric heater is rated 1000 W-200 V. The current flowing through the heater is:

Discussion

8.	(a) State the laws of refraction of light. Explain the term absolute refractive index of a medium and write an expression to relate it with the speed of light in vacuum. (b) The absolute refractive indices of two media 'A' and 'B' are 2.0 and 1.5 respectively. If the speed of light in medium 'B' is 2×108 m/s, calculate the speed of light in: (i) vacuum, (ii) medium 'A'.
Answer» (a) State the laws of refraction of light. Explain the term absolute refractive index of a medium and write an expression to relate it with the speed of light in vacuum. (b) The absolute refractive indices of two media 'A' and 'B' are 2.0 and 1.5 respectively. If the speed of light in medium 'B' is $2 \times 10^{8}$ m/s, calculate the speed of light in: (i) vacuum, (ii) medium 'A'.

Discussion

9.	What is magnetic electric filed and magnetic electric line
Answer» What is magnetic electric filed and magnetic electric line

Discussion

10.	Why are coal and petroleum categorised as natural resources ? Give a reason as to why they should be used judiciously.
Answer» Why are coal and petroleum categorised as natural resources ? Give a reason as to why they should be used judiciously.

Discussion

11.	Work done in moving a unit positive test charge from one point to other inside an electric field is called__.
Answer» Work done in moving a unit positive test charge from one point to other inside an electric field is called__.

Discussion

12.	what is the focal length of our eye when we are sleeping or when we are thinking with closed eyes ?
Answer» what is the focal length of our eye when we are sleeping or when we are thinking with closed eyes ?

Discussion

13.	During propagation of a wave which of the following quantities is transferred?
Answer» During propagation of a wave which of the following quantities is transferred?

Discussion

14.	A uniform magnetic field is directed vertically upwards. In which direction in this field should an alpha particle be projected so that it is deflected southward ? Name and state the rule you have used to find the direction in this case .
Answer» A uniform magnetic field is directed vertically upwards. In which direction in this field should an alpha particle be projected so that it is deflected southward ? Name and state the rule you have used to find the direction in this case .

Discussion

15.	In Fig. 7.15, A, B, C and D represent the test tubes each of height 20 cm which are filled with water up to heights of 12 cm, 14 cm, 16 cm and 18 cm respectively. If a vibrating tuning fork is placed over the mouth of test tube D, a loud sound is heard. (a) Describe the observations with the tubes A, B and C when the vibrating tuning fork is placed over the mounth of these tubes. (b) Give the reason for your observation in each tube. (c) State the principle illustrated by the above experiment.
Answer» In Fig. 7.15, A, B, C and D represent the test tubes each of height 20 cm which are filled with water up to heights of 12 cm, 14 cm, 16 cm and 18 cm respectively. If a vibrating tuning fork is placed over the mouth of test tube D, a loud sound is heard. (a) Describe the observations with the tubes A, B and C when the vibrating tuning fork is placed over the mounth of these tubes. (b) Give the reason for your observation in each tube. (c) State the principle illustrated by the above experiment.

15.

In Fig. 7.15, A, B, C and D represent the test tubes each of height 20 cm which are filled with water up to heights of 12 cm, 14 cm, 16 cm and 18 cm respectively. If a vibrating tuning fork is placed over the mouth of test tube D, a loud sound is heard. (a) Describe the observations with the tubes A, B and C when the vibrating tuning fork is placed over the mounth of these tubes. (b) Give the reason for your observation in each tube. (c) State the principle illustrated by the above experiment.

Answer»

In Fig. 7.15, A, B, C and D represent the test tubes each of height 20 cm which are filled with water up to heights of 12 cm, 14 cm, 16 cm and 18 cm respectively. If a vibrating tuning fork is placed over the mouth of test tube D, a loud sound is heard.

(a) Describe the observations with the tubes A, B and C when the vibrating tuning fork is placed over the mounth of these tubes.

(b) Give the reason for your observation in each tube.

(c) State the principle illustrated by the above experiment.

Discussion

16.	Why are fossil fuels classified as non-renewable sources of energy?
Answer» Why are fossil fuels classified as non-renewable sources of energy?

Discussion

17.	Fill in the following blanks with suitable words : A person is short-sighted if his eyeball is too ___ Spectacles with a ___ lens are needed. A person is long-sighted if his eyeball is too ___ Spectacles with a ___ lens are needed. These focus light rays exactly on to the ___
Answer» Fill in the following blanks with suitable words : A person is short-sighted if his eyeball is too ___ Spectacles with a ___ lens are needed. A person is long-sighted if his eyeball is too ___ Spectacles with a ___ lens are needed. These focus light rays exactly on to the ___

Discussion

18.	A lens of focal length 10 cm is being used by a student in the laboratory as magnifying glass. His near point distance is 25 cm. What magnification is the student getting ?
Answer» A lens of focal length 10 cm is being used by a student in the laboratory as magnifying glass. His near point distance is 25 cm. What magnification is the student getting ?

Discussion

19.	What will be compass direction if we take it to space?
Answer» What will be compass direction if we take it to space?

Discussion

20.	Ram has one bar in each hand of his. It is known to him that one of them is a magnet and the other is a magnetic material but not which bar is the magnet or which one is the magnetic material. He brings together the ends of both bars. He feels that there is an attractive force between them. Now he repeats the experiment, but this time, he brings together the end of the bar in his left hand and the centre of the bar in his right hand. He experiences an attractive force but one which is weaker than the earlier force. What could be the correct answer?
Answer» Ram has one bar in each hand of his. It is known to him that one of them is a magnet and the other is a magnetic material but not which bar is the magnet or which one is the magnetic material. He brings together the ends of both bars. He feels that there is an attractive force between them. Now he repeats the experiment, but this time, he brings together the end of the bar in his left hand and the centre of the bar in his right hand. He experiences an attractive force but one which is weaker than the earlier force. What could be the correct answer?

20.

Ram has one bar in each hand of his. It is known to him that one of them is a magnet and the other is a magnetic material but not which bar is the magnet or which one is the magnetic material. He brings together the ends of both bars. He feels that there is an attractive force between them. Now he repeats the experiment, but this time, he brings together the end of the bar in his left hand and the centre of the bar in his right hand. He experiences an attractive force but one which is weaker than the earlier force. What could be the correct answer?

Answer»

Ram has one bar in each hand of his. It is known to him that one of them is a magnet and the other is a magnetic material but not which bar is the magnet or which one is the magnetic material. He brings together the ends of both bars. He feels that there is an attractive force between them. Now he repeats the experiment, but this time, he brings together the end of the bar in his left hand and the centre of the bar in his right hand. He experiences an attractive force but one which is weaker than the earlier force. What could be the correct answer?

Discussion

21.	Why does gamma radiation actually occur
Answer» Why does gamma radiation actually occur

Discussion

22.	What is magnetic flux ?
Answer» What is magnetic flux ?

Discussion

23.	The meaning of the statement "The critical angle for diamond is 24” is:
Answer» The meaning of the statement "The critical angle for diamond is 24” is:

Discussion

24.	The force used to dry clothes in a washing machine is
Answer» The force used to dry clothes in a washing machine is

Discussion

25.	“When a magnet is brought close to the loop, the induced current in the loop will be in a direction such that the part of the loop facing the magnet repels the magnet.” Using the above statement, choose the correct answers.
Answer» “When a magnet is brought close to the loop, the induced current in the loop will be in a direction such that the part of the loop facing the magnet repels the magnet.” Using the above statement, choose the correct answers.

Discussion

26.	The figure below shows overhead views of four situations in which two forces act on the same block of mass m=1 kg and accelerate the block across a frictionless floor. Rank the situations according to the magnitudes of the acceleration of the block,
Answer» The figure below shows overhead views of four situations in which two forces act on the same block of mass m=1 kg and accelerate the block across a frictionless floor. Rank the situations according to the magnitudes of the acceleration of the block,

26.

The figure below shows overhead views of four situations in which two forces act on the same block of mass m=1 kg and accelerate the block across a frictionless floor. Rank the situations according to the magnitudes of the acceleration of the block,

Answer»

The figure below shows overhead views of four situations in which two forces act on the same block of mass m=1 kg and accelerate the block across a frictionless floor. Rank the situations according to the magnitudes of the acceleration of the block,

Discussion

27.	Describe the nature of image formed when an object is placed at a distance of 30 cm from a convex lens of focal length 15 cm.
Answer» Describe the nature of image formed when an object is placed at a distance of 30 cm from a convex lens of focal length 15 cm.

Discussion

28.	The Time period of a vibrating body of frequency 100 Hz is:
Answer» The Time period of a vibrating body of frequency 100 Hz is:

Discussion

29.	What do you mean by positive zero error with respect to a screw gauge? Support your answer with an appropriate diagram.
Answer» What do you mean by positive zero error with respect to a screw gauge? Support your answer with an appropriate diagram.

Discussion

30.	At what distance from a concave mirror of focal length 10 cm should an object 2 cm long be placed in order to get an erect image 6 cm tall ?
Answer» At what distance from a concave mirror of focal length 10 cm should an object 2 cm long be placed in order to get an erect image 6 cm tall ?

Discussion

31.	One cannot see through fog because :
Answer» One cannot see through fog because :

Discussion

32.	Name the most common practice of recharging ground water?
Answer» Name the most common practice of recharging ground water?

Discussion

33.	fisherman aims at the tail of the fish during spear fishing.give reason
Answer» fisherman aims at the tail of the fish during spear fishing.give reason

Discussion

34.	Which causes more bending (or more refraction) of light rays passing through it : a convex lens of long focal length or a convex lens of short focal length ?
Answer» Which causes more bending (or more refraction) of light rays passing through it : a convex lens of long focal length or a convex lens of short focal length ?

Discussion

35.	How to identify concave mirror
Answer» How to identify concave mirror

Discussion

36.	One important function of electron gun is
Answer» One important function of electron gun is

Discussion

37.	Twinkling of stars is due to___________.
Answer» Twinkling of stars is due to___________.

Discussion

38.	A ray of light travelling in air strikes the glass surface at an angle of incidence 60∘. Find the angle of refraction in glass if refractive index of glass is 32? (given sin60∘=√32 and sin35∘=1√3)
Answer» A ray of light travelling in air strikes the glass surface at an angle of incidence $60^{\circ}$ . Find the angle of refraction in glass if refractive index of glass is $\frac{3}{2}$ ? (given $s i n 60^{\circ} = \frac{\sqrt{3}}{2}$ and $s i n 35^{\circ} = \frac{1}{\sqrt{3}}$ )

Discussion

39.	The calorific values of three fuels A, B and C are 33 kJ/g, 48 kJ/g and 150 kJ/g, respectively. A is solid, B is liquid and C is a gas at room temperature. On combustion, both A and B produce carbon dioxide while C explodes forming steam. B and C leave no residue after combustion while A leaves behind some solid residue. Which one of the three fuels is the most ideal? Give two reasons to support your answer.
Answer» The calorific values of three fuels A, B and C are 33 kJ/g, 48 kJ/g and 150 kJ/g, respectively. A is solid, B is liquid and C is a gas at room temperature. On combustion, both A and B produce carbon dioxide while C explodes forming steam. B and C leave no residue after combustion while A leaves behind some solid residue. Which one of the three fuels is the most ideal? Give two reasons to support your answer.

Discussion

40.	Fossil fuels are energy rich compounds of an element X which were originally made by the plants with the help of sun's energy. (a) Name the element X. (b) Name another element which is usually found in combination with X in fossil fuels.
Answer» Fossil fuels are energy rich compounds of an element X which were originally made by the plants with the help of sun's energy. (a) Name the element X. (b) Name another element which is usually found in combination with X in fossil fuels.

Discussion

41.	Where will parallel rays meet/appears to meet ?
Answer» Where will parallel rays meet/appears to meet ?

41.

Where will parallel rays meet/appears to meet ?

Answer»

Where will parallel rays meet/appears to meet ?

Discussion

42.	A uniform metre rule is pivoted at its mid - point. A weight of 50 gf is suspended at one end of it. Where should a weight of 100 gf be suspended to keep the rule horizontal ?
Answer» A uniform metre rule is pivoted at its mid - point. A weight of 50 gf is suspended at one end of it. Where should a weight of 100 gf be suspended to keep the rule horizontal ?

Discussion

43.	Which lens is converging: (i) an equiconcave lens or an equiconvex lens? (ii) a concavo-convex lens or a convexo-concave lens?
Answer» Which lens is converging: (i) an equiconcave lens or an equiconvex lens? (ii) a concavo-convex lens or a convexo-concave lens?

Discussion

44.	Factors on which the resistance of a wire depend are
Answer» Factors on which the resistance of a wire depend are

Discussion

45.	Which of the following has the same value for all waves when travelling through vacuum?
Answer» Which of the following has the same value for all waves when travelling through vacuum?

Discussion

46.	An electric heater of power 600 W rasies the temperature of 4.0 kg of a liquid from 10.0∘C to 15.0∘C in 100 s.Calculate:(i) the heat capacity of 4.0 kg of liquid,and(ii) the specific heat capacity of liquid.
Answer» An electric heater of power 600 W rasies the temperature of 4.0 kg of a liquid from ${10.0}^{\circ} C t o {15.0}^{\circ} C$ in 100 s.Calculate:(i) the heat capacity of 4.0 kg of liquid,and(ii) the specific heat capacity of liquid.

Discussion

47.	Fig 8.13 below shows the I-V characteristic curves for four resistors. Identify the ohmic and non-ohmic resistors. Give a reason for your answer.
Answer» Fig 8.13 below shows the I-V characteristic curves for four resistors. Identify the ohmic and non-ohmic resistors. Give a reason for your answer.

47.

Fig 8.13 below shows the I-V characteristic curves for four resistors. Identify the ohmic and non-ohmic resistors. Give a reason for your answer.

Answer»

Fig 8.13 below shows the I-V characteristic curves for four resistors. Identify the ohmic and non-ohmic resistors. Give a reason for your answer.

Discussion

48.	Study the circuit diagram shown below carefully and calculate the: (a) current in the main circuit. (b) current in each of the resistors in the parallel circuit. [5 MARKS]
Answer» Study the circuit diagram shown below carefully and calculate the: (a) current in the main circuit. (b) current in each of the resistors in the parallel circuit. [5 MARKS]

Discussion

49.	What are the conditions in which light will behave as a 1. Wave 2.Particle 3.Ray
Answer» What are the conditions in which light will behave as a 1. Wave 2.Particle 3.Ray

Discussion

50.	What colour does the sky appear to an astronaut ?
Answer» What colour does the sky appear to an astronaut ?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A doctor has prescribed a corrective lens of power, -1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging ?

Tropic of cancer 2312∘N does not pass through which state of India?

Which among the following is not true for a plane mirror?

40 g of water at 600C is poured into a vessel containing 50 g of water at 200C. The final temperature recorded is 300C. Calculate the thermal capacity of the vessel. (Take specific heat capacity of water as 4.2 Jg−10C−1​).

A current of 2 A is passed through a coil of resistance 75Ω for 2 minutes. (a) How much heat energy is produced? (b) How much charge is passed through the resistance?

An electric heater is rated 1000 W-200 V. The current flowing through the heater is:

What is magnetic electric filed and magnetic electric line

Why are coal and petroleum categorised as natural resources ? Give a reason as to why they should be used judiciously.

Work done in moving a unit positive test charge from one point to other inside an electric field is called__.

what is the focal length of our eye when we are sleeping or when we are thinking with closed eyes ?

During propagation of a wave which of the following quantities is transferred?

A uniform magnetic field is directed vertically upwards. In which direction in this field should an alpha particle be projected so that it is deflected southward ? Name and state the rule you have used to find the direction in this case .

Why are fossil fuels classified as non-renewable sources of energy?

Fill in the following blanks with suitable words : A person is short-sighted if his eyeball is too ___ Spectacles with a ___ lens are needed. A person is long-sighted if his eyeball is too ___ Spectacles with a ___ lens are needed. These focus light rays exactly on to the ___

A lens of focal length 10 cm is being used by a student in the laboratory as magnifying glass. His near point distance is 25 cm. What magnification is the student getting ?

What will be compass direction if we take it to space?

Why does gamma radiation actually occur

What is magnetic flux ?

The meaning of the statement "The critical angle for diamond is 24” is:

The force used to dry clothes in a washing machine is

“When a magnet is brought close to the loop, the induced current in the loop will be in a direction such that the part of the loop facing the magnet repels the magnet.” Using the above statement, choose the correct answers.

The figure below shows overhead views of four situations in which two forces act on the same block of mass m=1 kg and accelerate the block across a frictionless floor. Rank the situations according to the magnitudes of the acceleration of the block,

Describe the nature of image formed when an object is placed at a distance of 30 cm from a convex lens of focal length 15 cm.

The Time period of a vibrating body of frequency 100 Hz is:

What do you mean by positive zero error with respect to a screw gauge? Support your answer with an appropriate diagram.

At what distance from a concave mirror of focal length 10 cm should an object 2 cm long be placed in order to get an erect image 6 cm tall ?

One cannot see through fog because :

Name the most common practice of recharging ground water?

fisherman aims at the tail of the fish during spear fishing.give reason

Which causes more bending (or more refraction) of light rays passing through it : a convex lens of long focal length or a convex lens of short focal length ?

How to identify concave mirror

One important function of electron gun is

Twinkling of stars is due to___________.

A ray of light travelling in air strikes the glass surface at an angle of incidence 60∘. Find the angle of refraction in glass if refractive index of glass is 32? (given sin60∘=√32 and sin35∘=1√3)

Fossil fuels are energy rich compounds of an element X which were originally made by the plants with the help of sun's energy. (a) Name the element X. (b) Name another element which is usually found in combination with X in fossil fuels.

Where will parallel rays meet/appears to meet ?

A uniform metre rule is pivoted at its mid - point. A weight of 50 gf is suspended at one end of it. Where should a weight of 100 gf be suspended to keep the rule horizontal ?

Which lens is converging: (i) an equiconcave lens or an equiconvex lens? (ii) a concavo-convex lens or a convexo-concave lens?

Factors on which the resistance of a wire depend are

Which of the following has the same value for all waves when travelling through vacuum?

An electric heater of power 600 W rasies the temperature of 4.0 kg of a liquid from 10.0∘C to 15.0∘C in 100 s.Calculate:(i) the heat capacity of 4.0 kg of liquid,and(ii) the specific heat capacity of liquid.

Fig 8.13 below shows the I-V characteristic curves for four resistors. Identify the ohmic and non-ohmic resistors. Give a reason for your answer.

Study the circuit diagram shown below carefully and calculate the: (a) current in the main circuit. (b) current in each of the resistors in the parallel circuit. [5 MARKS]

What are the conditions in which light will behave as a 1. Wave ​​​​2.Particle 3.Ray ​

What colour does the sky appear to an astronaut ?

40 g of water at 600C is poured into a vessel containing 50 g of water at 200C. The final temperature recorded is 300C. Calculate the thermal capacity of the vessel. (Take specific heat capacity of water as 4.2 Jg−10C−1).

Fill in the following blanks with suitable words : A person is short-sighted if his eyeball is too _ Spectacles with a _ lens are needed. A person is long-sighted if his eyeball is too _ Spectacles with a _ lens are needed. These focus light rays exactly on to the ___

What are the conditions in which light will behave as a 1. Wave 2.Particle 3.Ray