16569 + Interview Questions in Physics

1.	What device other than a plane mirror can be used to turn a ray of light through 180∘ ? Draw a diagram in support of your answer. Name an instrument in which this device is used.
Answer» What device other than a plane mirror can be used to turn a ray of light through $180^{\circ}$ ? Draw a diagram in support of your answer. Name an instrument in which this device is used.

Discussion

2.	A concave lens of focal length 'f' forms an image which is 'n' times the size of the object. The distance of the object from the lens is?
Answer» A concave lens of focal length 'f' forms an image which is 'n' times the size of the object. The distance of the object from the lens is?

Discussion

3.	How is the electric potential difference between the two points defined ? State its S.I. unit.
Answer» How is the electric potential difference between the two points defined ? State its S.I. unit.

Discussion

4.	(a) Write two points of difference between electric energy and electric power. (b) Out of 60 W and 40 W lamps, which one has a higher electrical resistance when in use. (c) What is commercial unit of electric energy? Convert it into Joules.
Answer» (a) Write two points of difference between electric energy and electric power. (b) Out of 60 W and 40 W lamps, which one has a higher electrical resistance when in use. (c) What is commercial unit of electric energy? Convert it into Joules.

Discussion

5.	State the Snell’s laws of refraction of light.
Answer» State the Snell’s laws of refraction of light.

Discussion

6.	Calculate the resistance of a resistor if the current flowing through it is 200 A when the applied potential difference is 0.8V
Answer» Calculate the resistance of a resistor if the current flowing through it is 200 A when the applied potential difference is 0.8V

Discussion

7.	Name the part of eye on which the image of the object is formed by the eye lens?
Answer» Name the part of eye on which the image of the object is formed by the eye lens?

Discussion

8.	What do you mean by a pitch of the screw?
Answer» What do you mean by a pitch of the screw?

Discussion

9.	Which of the following is true with respect to cryogenics being used in power transmission?
Answer» Which of the following is true with respect to cryogenics being used in power transmission?

Discussion

10.	Are sea waves completely transverse waves?
Answer» Are sea waves completely transverse waves?

Discussion

11.	How much amount of matter will produce 9×1016 J of energy during a nuclear fission reaction?
Answer» How much amount of matter will produce $9 \times 10^{16}$ J of energy during a nuclear fission reaction?

Discussion

12.	What is the harmful pollutant released from CFLs and LEDs?
Answer» What is the harmful pollutant released from CFLs and LEDs?

Discussion

13.	Suppose two spherical mirrors with reflecting surface towards your face are lying on the table,how will you distinguish between them just by looking?
Answer» Suppose two spherical mirrors with reflecting surface towards your face are lying on the table,how will you distinguish between them just by looking?

Discussion

14.	What is d.c and a.c.in terms of current
Answer» What is d.c and a.c.in terms of current

Discussion

15.	Q.. HOW DOES SIGN CONVENTION FOR LENSES AND MIRROR DIFFERS ?
Answer» Q.. HOW DOES SIGN CONVENTION FOR LENSES AND MIRROR DIFFERS ?

Discussion

16.	For class 1 lever, which one of the following statements is true?
Answer» For class 1 lever, which one of the following statements is true?

16.

For class 1 lever, which one of the following statements is true?

Answer»

For class 1 lever, which one of the following statements is true?

Discussion

17.	What type of image is formed : (a) in a plane mirror ? (b) on a cinema screen?
Answer» What type of image is formed : (a) in a plane mirror ? (b) on a cinema screen?

Discussion

18.	Can you run electric geysor with power rating 2kW ;220V on a 5A line? Give reason to justify your answer.
Answer» Can you run electric geysor with power rating 2kW ;220V on a 5A line? Give reason to justify your answer.

Discussion

19.	A rod of 2 m length pivoted at 0.5 m is balanced when a weight of 200 gf is placed at one of its ends. Calculate the weight of the rod.
Answer» A rod of 2 m length pivoted at 0.5 m is balanced when a weight of 200 gf is placed at one of its ends. Calculate the weight of the rod.

Discussion

20.	The waves produced by a motor boat sailing in water are:
Answer» The waves produced by a motor boat sailing in water are:

Discussion

21.	Liquid A of specific heat capacity 0.84 J g−1 K−1 at a temperature of 50∘C is mixed with 200g of a liquid B of specific heat capacity 2.1 J g−1 K−1 at 30∘C.The final temperature of mixture becomes 42∘C. Find the mass of liquid A.
Answer» Liquid A of specific heat capacity 0.84 J g⁻¹ K⁻¹ at a temperature of $50^{\circ} C$ is mixed with 200g of a liquid B of specific heat capacity 2.1 J g⁻¹ K⁻¹ at $30^{\circ} C$ .The final temperature of mixture becomes $42^{\circ} C$ . Find the mass of liquid A.

Discussion

22.	The work done in moving a unit positive charge between two points in an electric circuit is a measure of ___________.
Answer» The work done in moving a unit positive charge between two points in an electric circuit is a measure of ___________.

Discussion

23.	Identify the correct statements: (i) A compass is used to show the directions. (ii) The needle of a compass is magnetic. (iii) The needle of a compass always indicates the north and the south directions of the earth.
Answer» Identify the correct statements: (i) A compass is used to show the directions. (ii) The needle of a compass is magnetic. (iii) The needle of a compass always indicates the north and the south directions of the earth.

Discussion

24.	State qualitatively the effect of inserting an iron core into a current-carrying solenoid.
Answer» State qualitatively the effect of inserting an iron core into a current-carrying solenoid.

Discussion

25.	What is an electric circuit?
Answer» What is an electric circuit?

Discussion

26.	The work done in moving a unit positive charge between two points in an electric circuit is a measure of ___difference.
Answer» The work done in moving a unit positive charge between two points in an electric circuit is a measure of ___difference.

Discussion

27.	Define the terms pole, principal axis and centre of curvature with reference to a spherical mirror.
Answer» Define the terms pole, principal axis and centre of curvature with reference to a spherical mirror.

Discussion

28.	In which of the following Tyndall effect is not observed?
Answer» In which of the following Tyndall effect is not observed?

Discussion

29.	The power of a lens is positive if it ..................the rays.
Answer» The power of a lens is positive if it ..................the rays.

Discussion

30.	Which one of the following statements is incorrect regarding lyophilic sol
Answer» Which one of the following statements is incorrect regarding lyophilic sol

Discussion

31.	The electrical resistance of a mercury column in a cylindrical container is R. When all of the mercury is poured out into another cylindrical container of half the radius of cross section, the resistance of the new mercury column will be ______.
Answer» The electrical resistance of a mercury column in a cylindrical container is $R$ . When all of the mercury is poured out into another cylindrical container of half the radius of cross section, the resistance of the new mercury column will be ______.

Discussion

32.	Liquid A of specific heat capacity 0.84 Jg−1k−1at a temperature of 50∘C is mixed with 200 g of a liquid B of specific heat capacity 2.1 Jg−1k−1 at 30∘C. The final temperature of mixture becomes 42∘C. The mass of liquid A (in g) will be333750375data not sufficient
Answer» Liquid A of specific heat capacity $0.84 J g^{- 1} k^{- 1}$ at a temperature of $50^{\circ} C$ is mixed with $200 g$ of a liquid B of specific heat capacity $2.1 J g^{- 1} k^{- 1}$ at $30^{\circ} C$ . The final temperature of mixture becomes $42^{\circ} C$ . The mass of liquid A (in $g$ ) will be 333 750 375 data not sufficient

32.

Liquid A of specific heat capacity 0.84 Jg−1k−1at a temperature of 50∘C is mixed with 200 g of a liquid B of specific heat capacity 2.1 Jg−1k−1 at 30∘C. The final temperature of mixture becomes 42∘C. The mass of liquid A (in g) will be333750375data not sufficient

Answer»

Liquid A of specific heat capacity $0.84 J g^{- 1} k^{- 1}$ at a temperature of $50^{\circ} C$ is mixed with $200 g$ of a liquid B of specific heat capacity $2.1 J g^{- 1} k^{- 1}$ at $30^{\circ} C$ . The final temperature of mixture becomes $42^{\circ} C$ . The mass of liquid A (in $g$ ) will be

333
750
375
data not sufficient

Discussion

33.	A straight wire lying in a horizontal plane carries a current from north to south. (a) What will be the direction of magnetic field at a point just underneath it? (b) Name the law used to arrive at the answer in part (a).
Answer» A straight wire lying in a horizontal plane carries a current from north to south. (a) What will be the direction of magnetic field at a point just underneath it? (b) Name the law used to arrive at the answer in part (a).

33.

A straight wire lying in a horizontal plane carries a current from north to south. (a) What will be the direction of magnetic field at a point just underneath it? (b) Name the law used to arrive at the answer in part (a).

Answer»

A straight wire lying in a horizontal plane carries a current from north to south.

(a) What will be the direction of magnetic field at a point just underneath it?

(b) Name the law used to arrive at the answer in part (a).

Discussion

34.	A ray of light is incident from air to water. If the angle of incidence is 60∘, find the angle of refraction. Given the refractive index of water is 43.
Answer» A ray of light is incident from air to water. If the angle of incidence is $60^{\circ}$ , find the angle of refraction. Given the refractive index of water is $\frac{4}{3}$ .

Discussion

35.	Question 4 The figure shows a ray of light as it travels from medium A to medium B. Refractive index of the medium B relative to medium A is (a) √3√2 (b) √2√3 (c) 1√2 (d) √2
Answer» Question 4 The figure shows a ray of light as it travels from medium A to medium B. Refractive index of the medium B relative to medium A is (a) $\frac{\sqrt{3}}{\sqrt{2}}$ (b) $\frac{\sqrt{2}}{\sqrt{3}}$ (c) $\frac{1}{\sqrt{2}}$ (d) $\sqrt{2}$

Discussion

36.	In the adjoining diagram, a wavefront AB, moving in air is incident on a plane glass surface XY. Its position CD after refraction through a glass slab is shown also along with the normals drawn at A and D. The refractive index of glass with respect to air (μ=1 ) will be equal to
Answer» In the adjoining diagram, a wavefront AB, moving in air is incident on a plane glass surface XY. Its position CD after refraction through a glass slab is shown also along with the normals drawn at A and D. The refractive index of glass with respect to air (μ=1 ) will be equal to

Discussion

37.	Which of the following is not a radioactive element?
Answer» Which of the following is not a radioactive element?

Discussion

38.	Spherical mirror produces an image of magnification-1 on a screen placed at a distance of 50cm from mirror 1. Write the type of mirror 2. Find distance of image from object and it's it's focal length
Answer» Spherical mirror produces an image of magnification-1 on a screen placed at a distance of 50cm from mirror 1. Write the type of mirror 2. Find distance of image from object and it's it's focal length

38.

Spherical mirror produces an image of magnification-1 on a screen placed at a distance of 50cm from mirror 1. Write the type of mirror 2. Find distance of image from object and it's it's focal length

Answer»

Spherical mirror produces an image of magnification-1 on a screen placed at a distance of 50cm from mirror

1. Write the type of mirror

2. Find distance of image from object and it's it's focal length

Discussion

39.	fig. Shows the variation of force acting on a body with time. Assuming the body to start from rest, the variation of its momentum with time is best represented by which plot?
Answer» fig. Shows the variation of force acting on a body with time. Assuming the body to start from rest, the variation of its momentum with time is best represented by which plot?

Discussion

40.	Why voltmeter is connected in parallel across two points in the circuit to measure the potential difference?
Answer» Why voltmeter is connected in parallel across two points in the circuit to measure the potential difference?

Discussion

41.	A resistor of 8 Ω is connected in parallel with another resistor R2. The resultant resistance of the combination is 4 Ω. Then, the value of resistor R2 is:
Answer» A resistor of 8 Ω is connected in parallel with another resistor R₂. The resultant resistance of the combination is 4 Ω. Then, the value of resistor R₂ is:

Discussion

42.	Question 82 (i) Meteorology One measure of average global temperature shows how each year varies from a base measure. The table shows results for several years. Year19581964196519782002Difference from base0.10∘C−0.17∘C−0.10∘C(150)∘C0.54∘ See the table and answer the following : Order the five years from coldest to warmest.
Answer» Question 82 (i) Meteorology One measure of average global temperature shows how each year varies from a base measure. The table shows results for several years. $\begin{matrix} Y e a r & 1958 & 1964 & 1965 & 1978 & 2002 D i f f e r e n c e f r o m b a s e & {0.10}^{\circ} C & - {0.17}^{\circ} C & - {0.10}^{\circ} C & {(\frac{1}{50})}^{\circ} C & {0.54}^{\circ} \end{matrix}$ See the table and answer the following : Order the five years from coldest to warmest.

42.

Question 82 (i) Meteorology One measure of average global temperature shows how each year varies from a base measure. The table shows results for several years. Year19581964196519782002Difference from base0.10∘C−0.17∘C−0.10∘C(150)∘C0.54∘ See the table and answer the following : Order the five years from coldest to warmest.

Answer»

Question 82 (i)

Meteorology One measure of average global temperature shows how each year varies from a base measure. The table shows results for several years.
$\begin{matrix} Y e a r & 1958 & 1964 & 1965 & 1978 & 2002 D i f f e r e n c e f r o m b a s e & {0.10}^{\circ} C & - {0.17}^{\circ} C & - {0.10}^{\circ} C & {(\frac{1}{50})}^{\circ} C & {0.54}^{\circ} \end{matrix}$
See the table and answer the following :
Order the five years from coldest to warmest.

Discussion

43.	Which phenomenon of light makes the water to appear shallower than it really is ?
Answer» Which phenomenon of light makes the water to appear shallower than it really is ?

Discussion

44.	Does the refractive index of an object chqnges when we use light of different wavelength/ colors?
Answer» Does the refractive index of an object chqnges when we use light of different wavelength/ colors?

Discussion

45.	Fuse wire used in power circuit is of
Answer» Fuse wire used in power circuit is of

Discussion

46.	The Indian Space Research Organisation was formed in which year?1969
Answer» The Indian Space Research Organisation was formed in which year? 1969

Discussion

47.	(a) Which requires more heat : 1 g ice at 0oC or 1 g water at 0oC to raise its temperature to 10oC ? (b) Explain your answer in part (a).
Answer» (a) Which requires more heat : 1 g ice at $0^{o} C$ or 1 g water at $0^{o} C$ to raise its temperature to $10^{o} C$ ? (b) Explain your answer in part (a).

47.

(a) Which requires more heat : 1 g ice at 0oC or 1 g water at 0oC to raise its temperature to 10oC ? (b) Explain your answer in part (a).

Answer»

(a) Which requires more heat : 1 g ice at $0^{o} C$ or 1 g water at $0^{o} C$ to raise its temperature to $10^{o} C$ ?

(b) Explain your answer in part (a).

Discussion

48.	Why planets do not twinkle?
Answer» Why planets do not twinkle?

Discussion

49.	What was the advantage of having HST design with two hyperbolic mirrors?
Answer» What was the advantage of having HST design with two hyperbolic mirrors?

Discussion

50.	Can......we......magnetize......a .......charged body??????????????
Answer» Can......we......magnetize......a .......charged body??????????????

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What device other than a plane mirror can be used to turn a ray of light through 180∘ ? Draw a diagram in support of your answer. Name an instrument in which this device is used.

A concave lens of focal length 'f' forms an image which is 'n' times the size of the object. The distance of the object from the lens is?

How is the electric potential difference between the two points defined ? State its S.I. unit.

(a) Write two points of difference between electric energy and electric power. (b) Out of 60 W and 40 W lamps, which one has a higher electrical resistance when in use. (c) What is commercial unit of electric energy? Convert it into Joules.

State the Snell’s laws of refraction of light.

Calculate the resistance of a resistor if the current flowing through it is 200 A when the applied potential difference is 0.8V

Name the part of eye on which the image of the object is formed by the eye lens?

What do you mean by a pitch of the screw?

Which of the following is true with respect to cryogenics being used in power transmission?

Are sea waves completely transverse waves?

How much amount of matter will produce 9×1016 J of energy during a nuclear fission reaction?

What is the harmful pollutant released from CFLs and LEDs?

Suppose two spherical mirrors with reflecting surface towards your face are lying on the table,how will you distinguish between them just by looking?

What is d.c and a.c.in terms of current

Q.. HOW DOES SIGN CONVENTION FOR LENSES AND MIRROR DIFFERS ?

For class 1 lever, which one of the following statements is true?

What type of image is formed : (a) in a plane mirror ? (b) on a cinema screen?

Can you run electric geysor with power rating 2kW ;220V on a 5A line? Give reason to justify your answer.

A rod of 2 m length pivoted at 0.5 m is balanced when a weight of 200 gf is placed at one of its ends. Calculate the weight of the rod.

The waves produced by a motor boat sailing in water are:

Liquid A of specific heat capacity 0.84 J g−1 K−1 at a temperature of 50∘C is mixed with 200g of a liquid B of specific heat capacity 2.1 J g−1 K−1 at 30∘C.The final temperature of mixture becomes 42∘C. Find the mass of liquid A.

The work done in moving a unit positive charge between two points in an electric circuit is a measure of ___________.

Identify the correct statements: (i) A compass is used to show the directions. (ii) The needle of a compass is magnetic. (iii) The needle of a compass always indicates the north and the south directions of the earth.

State qualitatively the effect of inserting an iron core into a current-carrying solenoid.

What is an electric circuit?

The work done in moving a unit positive charge between two points in an electric circuit is a measure of ___difference.

Define the terms pole, principal axis and centre of curvature with reference to a spherical mirror.

In which of the following Tyndall effect is not observed?

The power of a lens is positive if it ..................the rays.

Which one of the following statements is incorrect regarding lyophilic sol

The electrical resistance of a mercury column in a cylindrical container is R. When all of the mercury is poured out into another cylindrical container of half the radius of cross section, the resistance of the new mercury column will be ______.

Liquid A of specific heat capacity 0.84 Jg−1k−1at a temperature of 50∘C is mixed with 200 g of a liquid B of specific heat capacity 2.1 Jg−1k−1 at 30∘C. The final temperature of mixture becomes 42∘C. The mass of liquid A (in g) will be333750375data not sufficient

A straight wire lying in a horizontal plane carries a current from north to south. (a) What will be the direction of magnetic field at a point just underneath it? (b) Name the law used to arrive at the answer in part (a).

A ray of light is incident from air to water. If the angle of incidence is 60∘, find the angle of refraction. Given the refractive index of water is 43.

Question 4 The figure shows a ray of light as it travels from medium A to medium B. Refractive index of the medium B relative to medium A is (a) √3√2 (b) √2√3 (c) 1√2 (d) √2

In the adjoining diagram, a wavefront AB, moving in air is incident on a plane glass surface XY. Its position CD after refraction through a glass slab is shown also along with the normals drawn at A and D. The refractive index of glass with respect to air (μ=1 ) will be equal to

Which of the following is not a radioactive element?

Spherical mirror produces an image of magnification-1 on a screen placed at a distance of 50cm from mirror 1. Write the type of mirror 2. Find distance of image from object and it's it's focal length

fig. Shows the variation of force acting on a body with time. Assuming the body to start from rest, the variation of its momentum with time is best represented by which plot?

Why voltmeter is connected in parallel across two points in the circuit to measure the potential difference?

A resistor of 8 Ω is connected in parallel with another resistor R2. The resultant resistance of the combination is 4 Ω. Then, the value of resistor R2 is:

Which phenomenon of light makes the water to appear shallower than it really is ?

Does the refractive index of an object chqnges when we use light of different wavelength/ colors?

Fuse wire used in power circuit is of

The Indian Space Research Organisation was formed in which year?1969

(a) Which requires more heat : 1 g ice at 0oC or 1 g water at 0oC to raise its temperature to 10oC ? (b) Explain your answer in part (a).

Why planets do not twinkle?

What was the advantage of having HST design with two hyperbolic mirrors?

Can......we......magnetize......a .......charged body??????????????