16569 + Interview Questions in Physics

1.	The unit in which the domestic electric meters measure the electrical energy consumed and its value in SI unit is:
Answer» The unit in which the domestic electric meters measure the electrical energy consumed and its value in SI unit is:

Discussion

2.	Two sounds A and B are of same amplitudes, same wave forms but of frequencies F and 2F respectively. Then : (a) B differ in quality from A (b) B is grave, A is shrill (c) B is shrill, A is grave (d) B is louder than A.
Answer» Two sounds A and B are of same amplitudes, same wave forms but of frequencies F and 2F respectively. Then : (a) B differ in quality from A (b) B is grave, A is shrill (c) B is shrill, A is grave (d) B is louder than A.

2.

Two sounds A and B are of same amplitudes, same wave forms but of frequencies F and 2F respectively. Then : (a) B differ in quality from A (b) B is grave, A is shrill (c) B is shrill, A is grave (d) B is louder than A.

Answer»

Two sounds A and B are of same amplitudes, same wave forms but of frequencies F and 2F respectively.

Then :

(a) B differ in quality from A

(b) B is grave, A is shrill

(c) B is shrill, A is grave

(d) B is louder than A.

Discussion

3.	In one average life
Answer» In one average life

Discussion

4.	Floating turbine generators are used in the sea to harness ______
Answer» Floating turbine generators are used in the sea to harness ______

Discussion

5.	The sound created by a sound source travelling at supersonic speed is known as ___.
Answer» The sound created by a sound source travelling at supersonic speed is known as ___.

Discussion

6.	Find the relation between drift velocity and relaxation time of charge carries in a conductor. A conductor of length 'L' is connected to a d.c. source of emf 'E'. If the length of the conductor is tripled by stretching it, keeping 'E' constant, explain how its drift velocity would be affected.
Answer» Find the relation between drift velocity and relaxation time of charge carries in a conductor. A conductor of length 'L' is connected to a d.c. source of emf 'E'. If the length of the conductor is tripled by stretching it, keeping 'E' constant, explain how its drift velocity would be affected.

Discussion

7.	How do they keep high voltage and low current in step down transformers even though Voltage is directly proportional to Current?
Answer» How do they keep high voltage and low current in step down transformers even though Voltage is directly proportional to Current?

Discussion

8.	An ideal gas at 1 bar is heated from 273 K to 373 K at constant pressure. If its initial volume is 5.46 L, what will be the final volume?
Answer» An ideal gas at 1 bar is heated from 273 K to 373 K at constant pressure. If its initial volume is 5.46 L, what will be the final volume?

Discussion

9.	The angle between incident ray and emergent ray of prism is called
Answer» The angle between incident ray and emergent ray of prism is called

Discussion

10.	What happens to the heat produced in a conductor when current is doubled?
Answer» What happens to the heat produced in a conductor when current is doubled?

Discussion

11.	What do you understand by the term spectrum ?
Answer» What do you understand by the term spectrum ?

Discussion

12.	A coil having 12 turns is connected to a battery. The magnetic field at the axis of the helix will be ___ compared to the magnetic field at the center of a circular loop of the same radius carrying current.
Answer» A coil having 12 turns is connected to a battery. The magnetic field at the axis of the helix will be ___ compared to the magnetic field at the center of a circular loop of the same radius carrying current.

Discussion

13.	The area of cross section of a conductor is 10 cm2 and a current of 3 A is flowing through it. The drift velocity of electrons is 4×10−4 ms−1. What will be the new cross sectional area if we are increasing the drift velocity to 7×10−3 ms−1 keeping the current flow constant?
Answer» The area of cross section of a conductor is $10 c m^{2}$ and a current of $3 A$ is flowing through it. The drift velocity of electrons is $4 \times 10^{- 4} m s^{- 1}$ . What will be the new cross sectional area if we are increasing the drift velocity to $7 \times 10^{- 3} m s^{- 1}$ keeping the current flow constant?

Discussion

14.	How do fusion and fission differ?
Answer» How do fusion and fission differ?

Discussion

15.	A pump is used to pump a liquid of density ρ continuously through a pipe of cross-sectional area A. If the liquid is flowing with a speed v, find the power of the pump.
Answer» A pump is used to pump a liquid of density $ρ$ continuously through a pipe of cross-sectional area $A$ . If the liquid is flowing with a speed $v$ , find the power of the pump.

Discussion

16.	(a+b)3
Answer» (a+b)3

Discussion

17.	What is the difference between latent heat and specific latent heat ?
Answer» What is the difference between latent heat and specific latent heat ?

Discussion

18.	Why school bell are made up of metals ?
Answer» Why school bell are made up of metals ?

Discussion

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

Discussion

20.	Number of α and β particles emitted when uranium nucleus 92U238 decays to 82Pb214 are
Answer» Number of $α$ and $β$ particles emitted when uranium nucleus $_{92} U^{238}$ decays to $_{82} P b^{214}$ are

Discussion

21.	How a charge in acceleration produces a magnetic field ?
Answer» How a charge in acceleration produces a magnetic field ?

Discussion

22.	An electric iron of resistance 20Ω takes a current of 5 A. Calculate the heat developed in 30 seconds.
Answer» An electric iron of resistance $20 Ω$ takes a current of $5 A$ . Calculate the heat developed in $30 s e c o n d s$ .

Discussion

23.	use two rays to find the position and nature of image of an object placed at distance of 8cm from concave mirror of focal length 12 cm.
Answer» use two rays to find the position and nature of image of an object placed at distance of 8cm from concave mirror of focal length 12 cm.

Discussion

24.	If A is a skew-symmetric matrix of order 3, then the matrix A4 is
Answer» If A is a skew-symmetric matrix of order 3, then the matrix $A^{4}$ is

Discussion

25.	Which type of transistors are given in figure a and figure b respectively?
Answer» Which type of transistors are given in figure a and figure b respectively?

Discussion

26.	10 g of ice at 0oC absorbs 5460 J of heat energy to melt and change to water at 50oC. Calculate the specific latent heat of fusion of ice. Specific heat capacity of water is 4200 J kg−1 K−1.
Answer» 10 g of ice at $0^{o} C$ absorbs 5460 J of heat energy to melt and change to water at $50^{o} C$ . Calculate the specific latent heat of fusion of ice. Specific heat capacity of water is 4200 J $k g^{-} 1 K^{- 1}$ .

Discussion

27.	In the experiment on finding the equivalent resistance of two resistors connected in parallel three students connected the Voltmeter in their circuits in the three ways X, Y and Z shown here. The voltmeter has been correctly connected in.
Answer» In the experiment on finding the equivalent resistance of two resistors connected in parallel three students connected the Voltmeter in their circuits in the three ways X, Y and Z shown here. The voltmeter has been correctly connected in.

27.

In the experiment on finding the equivalent resistance of two resistors connected in parallel three students connected the Voltmeter in their circuits in the three ways X, Y and Z shown here. The voltmeter has been correctly connected in.

Answer»

In the experiment on finding the equivalent resistance of two resistors connected in parallel three students connected the Voltmeter in their circuits in the three ways X, Y and Z shown here.

The voltmeter has been correctly connected in.

Discussion

28.	The sky would appear red instead of blue, if:
Answer» The sky would appear red instead of blue, if:

Discussion

29.	The resistance of a conductor is said to be 1 Ω if:
Answer» The resistance of a conductor is said to be $1 Ω$ if:

Discussion

30.	The floor of the swimming pool looks shallower that what it really is. What is the phenomenon responsible for it?
Answer» The floor of the swimming pool looks shallower that what it really is. What is the phenomenon responsible for it?

Discussion

31.	Use the following information to answer the next question. The length of a copper rod at 35°C is measured to be 1.5 m by an aluminium tape, which is correct at 15°C. Assume that the coefficients of linear expansion for aluminium and copper are 2.5 × 10 − 15/K and 1.7 × 10 − 5/K respectively. What is the length of the copper rod at temperature 15°C?
Answer» Use the following information to answer the next question. The length of a copper rod at 35°C is measured to be 1.5 m by an aluminium tape, which is correct at 15°C. Assume that the coefficients of linear expansion for aluminium and copper are 2.5 × 10 ^{− 15}/K and 1.7 × 10 ^{− 5}/K respectively. What is the length of the copper rod at temperature 15°C?

31.

Use the following information to answer the next question. The length of a copper rod at 35°C is measured to be 1.5 m by an aluminium tape, which is correct at 15°C. Assume that the coefficients of linear expansion for aluminium and copper are 2.5 × 10 − 15/K and 1.7 × 10 − 5/K respectively. What is the length of the copper rod at temperature 15°C?

Answer»

Use the following information to answer the next question.

The length of a copper rod at 35°C is measured to be 1.5 m by an aluminium tape, which is correct at 15°C. Assume that the coefficients of linear expansion for aluminium and copper are 2.5 × 10 ^{− 15}/K and 1.7 × 10 ^{− 5}/K respectively.

What is the length of the copper rod at temperature 15°C?

Discussion

32.	A man holding a lighted candle in front of thick glass mirror and viewing it obliquely sees a number of images of the candle. What is the origin of these multiple images?
Answer» A man holding a lighted candle in front of thick glass mirror and viewing it obliquely sees a number of images of the candle. What is the origin of these multiple images?

Discussion

33.	Which of the following options is correct for the values that magnification (m) can take for a concave lens?
Answer» Which of the following options is correct for the values that magnification (m) can take for a concave lens?

Discussion

34.	What are Orbitals??
Answer» What are Orbitals??

Discussion

35.	What kind of lens is used to correct (a) short-sightedness (b) long-sightedness ?
Answer» What kind of lens is used to correct (a) short-sightedness (b) long-sightedness ?

Discussion

36.	What is the relationship between wavelength and frequency for a sound wave moving at a constant speed?
Answer» What is the relationship between wavelength and frequency for a sound wave moving at a constant speed?

Discussion

37.	When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.
Answer» When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.

Discussion

38.	The sun sends out a coronal mass ejection continuously towards the earth having charged particles at the constant rate of 1.6 × (10) ^19 coulombs/sec throughout the day. Assuming that the sun and earth are maintained at a potential difference of 10,000 volts, find the energy (in J) received by India in 5 days. Given India receives 10 % of the energy received by the face of the earth. A) 345 ×10-19 B) 3.5 ×1028 C) 3.5×10 27 D) 1.6 ×1019
Answer» The sun sends out a coronal mass ejection continuously towards the earth having charged particles at the constant rate of 1.6 × (10) ^19 coulombs/sec throughout the day. Assuming that the sun and earth are maintained at a potential difference of 10,000 volts, find the energy (in J) received by India in 5 days. Given India receives 10 % of the energy received by the face of the earth. A) 345 ×10-19 B) 3.5 ×1028 C) 3.5×10 27 D) 1.6 ×1019

Discussion

39.	What is lenz law
Answer» What is lenz law

Discussion

40.	The phenomenon of rainbow happens due to:
Answer» The phenomenon of rainbow happens due to:

Discussion

41.	Heat wave toll in Telangana crosses 100. Consider the following statements about the Heat Wave: Which of the above statement(s) is/are incorrect?
Answer» Heat wave toll in Telangana crosses 100. Consider the following statements about the Heat Wave: Which of the above statement(s) is/are incorrect?

Discussion

42.	The correct statement(s) pertaining to the adsorption of a gas on a solid surface is (are)
Answer» The correct statement(s) pertaining to the adsorption of a gas on a solid surface is (are)

Discussion

43.	Q5. Consider the following statements. 1. The Energy Management Centre (EMC) of Kerala government has been listed in one of the six projects recognized by the United Nations Environment Programme (UNEP). 2. The EMC is the only Indian project to get recognition for energy efficiency. 3. The Global Status Report 2017: Towards a zero-emission, efficient, resilient buildings and construction sector is published by UNEP. Which of the above statement(s) is/are correct?
Answer» Q5. Consider the following statements. 1. The Energy Management Centre (EMC) of Kerala government has been listed in one of the six projects recognized by the United Nations Environment Programme (UNEP). 2. The EMC is the only Indian project to get recognition for energy efficiency. 3. The Global Status Report 2017: Towards a zero-emission, efficient, resilient buildings and construction sector is published by UNEP. Which of the above statement(s) is/are correct?

43.

Q5. Consider the following statements. 1. The Energy Management Centre (EMC) of Kerala government has been listed in one of the six projects recognized by the United Nations Environment Programme (UNEP). 2. The EMC is the only Indian project to get recognition for energy efficiency. 3. The Global Status Report 2017: Towards a zero-emission, efficient, resilient buildings and construction sector is published by UNEP. Which of the above statement(s) is/are correct?

Answer»

Q5. Consider the following statements.

1. The Energy Management Centre (EMC) of Kerala government has been listed in one of the six projects recognized by the United Nations Environment Programme (UNEP).

2. The EMC is the only Indian project to get recognition for energy efficiency.

3. The Global Status Report 2017: Towards a zero-emission, efficient, resilient buildings and construction sector is published by UNEP.

Which of the above statement(s) is/are correct?

Discussion

44.	A person having myopic eyes uses a concave lens of focal length 50 cm. What is the power of the lens?
Answer» A person having myopic eyes uses a concave lens of focal length 50 cm. What is the power of the lens?

Discussion

45.	An object is placed at a distance of 10 cm from a concave mirror of focal length 20 cm. (a) Draw a ray diagram for the formation of image. (b) Calculate the image distance. (c) State two characteristics of the image formed.
Answer» An object is placed at a distance of 10 cm from a concave mirror of focal length 20 cm . (a) Draw a ray diagram for the formation of image. (b) Calculate the image distance. (c) State two characteristics of the image formed.

45.

An object is placed at a distance of 10 cm from a concave mirror of focal length 20 cm. (a) Draw a ray diagram for the formation of image. (b) Calculate the image distance. (c) State two characteristics of the image formed.

Answer»

An object is placed at a distance of 10 cm from a concave mirror of focal length 20 cm

. (a) Draw a ray diagram for the formation of image.

(b) Calculate the image distance.

(c) State two characteristics of the image formed.

Discussion

46.	What should the angle between force and displacement be to get the minimum work?
Answer» What should the angle between force and displacement be to get the minimum work?

Discussion

47.	Define the term principal axis of a lens.
Answer» Define the term principal axis of a lens.

Discussion

48.	Which is the nuclear power plant located near kerala?
Answer» Which is the nuclear power plant located near kerala?

48.

Which is the nuclear power plant located near kerala?

Answer»

Which is the nuclear power plant located near kerala?

Discussion

49.	You do not enjoy watching a movie from a very short distance from the screen in a cinema hall. Why?
Answer» You do not enjoy watching a movie from a very short distance from the screen in a cinema hall. Why?

Discussion

50.	What is thermal resistivity?
Answer» What is thermal resistivity?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The unit in which the domestic electric meters measure the electrical energy consumed and its value in SI unit is:

Two sounds A and B are of same amplitudes, same wave forms but of frequencies F and 2F respectively. Then : (a) B differ in quality from A (b) B is grave, A is shrill (c) B is shrill, A is grave (d) B is louder than A.

In one average life

Floating turbine generators are used in the sea to harness ______

The sound created by a sound source travelling at supersonic speed is known as ___.

Find the relation between drift velocity and relaxation time of charge carries in a conductor. A conductor of length 'L' is connected to a d.c. source of emf 'E'. If the length of the conductor is tripled by stretching it, keeping 'E' constant, explain how its drift velocity would be affected.

How do they keep high voltage and low current in step down transformers even though Voltage is directly proportional to Current?

An ideal gas at 1 bar is heated from 273 K to 373 K at constant pressure. If its initial volume is 5.46 L, what will be the final volume?

The angle between incident ray and emergent ray of prism is called

What happens to the heat produced in a conductor when current is doubled?

What do you understand by the term spectrum ?

A coil having 12 turns is connected to a battery. The magnetic field at the axis of the helix will be ___ compared to the magnetic field at the center of a circular loop of the same radius carrying current.

The area of cross section of a conductor is 10 cm2 and a current of 3 A is flowing through it. The drift velocity of electrons is 4×10−4 ms−1. What will be the new cross sectional area if we are increasing the drift velocity to 7×10−3 ms−1 keeping the current flow constant?

How do fusion and fission differ?

A pump is used to pump a liquid of density ρ continuously through a pipe of cross-sectional area A. If the liquid is flowing with a speed v, find the power of the pump.

(a+b)3

What is the difference between latent heat and specific latent heat ?

Why school bell are made up of metals ?

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

Number of α and β particles emitted when uranium nucleus 92U238 decays to 82Pb214 are

How a charge in acceleration produces a magnetic field ?

An electric iron of resistance 20Ω takes a current of 5 A. Calculate the heat developed in 30 seconds.

use two rays to find the position and nature of image of an object placed at distance of 8cm from concave mirror of focal length 12 cm.

If A is a skew-symmetric matrix of order 3, then the matrix A4 is

Which type of transistors are given in figure a and figure b respectively?

10 g of ice at 0oC absorbs 5460 J of heat energy to melt and change to water at 50oC. Calculate the specific latent heat of fusion of ice. Specific heat capacity of water is 4200 J kg−1 K−1.

In the experiment on finding the equivalent resistance of two resistors connected in parallel three students connected the Voltmeter in their circuits in the three ways X, Y and Z shown here. The voltmeter has been correctly connected in.

The sky would appear red instead of blue, if:

The resistance of a conductor is said to be 1 Ω if:

The floor of the swimming pool looks shallower that what it really is. What is the phenomenon responsible for it?

A man holding a lighted candle in front of thick glass mirror and viewing it obliquely sees a number of images of the candle. What is the origin of these multiple images?

Which of the following options is correct for the values that magnification (m) can take for a concave lens?

What are Orbitals??

What kind of lens is used to correct (a) short-sightedness (b) long-sightedness ?

What is the relationship between wavelength and frequency for a sound wave moving at a constant speed?

When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.

What is lenz law

The phenomenon of rainbow happens due to:

Heat wave toll in Telangana crosses 100. Consider the following statements about the Heat Wave: Which of the above statement(s) is/are incorrect?

The correct statement(s) pertaining to the adsorption of a gas on a solid surface is (are)

A person having myopic eyes uses a concave lens of focal length 50 cm. What is the power of the lens?

An object is placed at a distance of 10 cm from a concave mirror of focal length 20 cm. (a) Draw a ray diagram for the formation of image. (b) Calculate the image distance. (c) State two characteristics of the image formed.

What should the angle between force and displacement be to get the minimum work?

Define the term principal axis of a lens.

Which is the nuclear power plant located near kerala?

You do not enjoy watching a movie from a very short distance from the screen in a cinema hall. Why?

What is thermal resistivity?