16569 + Interview Questions in Physics

1.	Rakesh wanted to do the prism experiment, he took a prism and passed a monochromatic light through the prism. Which of the following phenomenon would be observed?
Answer» Rakesh wanted to do the prism experiment, he took a prism and passed a monochromatic light through the prism. Which of the following phenomenon would be observed?

Discussion

2.	A window air conditioner is brought into the center of a dorm room and turned on. After several minutes, the temperature of the room:
Answer» A window air conditioner is brought into the center of a dorm room and turned on. After several minutes, the temperature of the room:

Discussion

3.	How can overloading occur in a circuit when many appliances are connected to a single socket?
Answer» How can overloading occur in a circuit when many appliances are connected to a single socket?

Discussion

4.	Calculate the ratio of intensity or loudness of 2 waves having amplitudes in the ratio 4: 9
Answer» Calculate the ratio of intensity or loudness of 2 waves having amplitudes in the ratio 4: 9

Discussion

5.	Draw ray diagrams showing the image formation by a convex lens when an object is placed (a) between optical centre and focus of the lens (b) between focus and twice the focal length of the lens (c) at twice the focal length of the lens (d) at infinity (e) at the focus of the lens
Answer» Draw ray diagrams showing the image formation by a convex lens when an object is placed (a) between optical centre and focus of the lens (b) between focus and twice the focal length of the lens (c) at twice the focal length of the lens (d) at infinity (e) at the focus of the lens

Discussion

6.	In the following circuit the equivalent resistance between A and B is
Answer» In the following circuit the equivalent resistance between A and B is

Discussion

7.	The three types of radioactivity in increasing order of penetrating power are?
Answer» The three types of radioactivity in increasing order of penetrating power are?

Discussion

8.	electricity is the flow of electrons and in byjus video they said electrons revolve around protons and neutons(nucleus) how can electrons move in a direction when protons are attracting them and if protons move along with electron they dont generate electricity as stated in Byjus video.
Answer» electricity is the flow of electrons and in byjus video they said electrons revolve around protons and neutons(nucleus) how can electrons move in a direction when protons are attracting them and if protons move along with electron they dont generate electricity as stated in Byjus video.

Discussion

9.	Varsha went to her native village recently which is facing shortage of water. She found out that people in her village are basically involved in agricultural activities and use traditional methods of irrigation. They also depend on rain for most of the irrigation. In addition, they clear forests for agricultural activities. Also, a factory is being setup at a nearby site which will be drawing water from the only river beside the village. Many buildings are also being constructed for the factory. What effect do you think these activities will have on the problem of water shortage? Justify your answer. [5 MARKS]
Answer» Varsha went to her native village recently which is facing shortage of water. She found out that people in her village are basically involved in agricultural activities and use traditional methods of irrigation. They also depend on rain for most of the irrigation. In addition, they clear forests for agricultural activities. Also, a factory is being setup at a nearby site which will be drawing water from the only river beside the village. Many buildings are also being constructed for the factory. What effect do you think these activities will have on the problem of water shortage? Justify your answer. [5 MARKS]

Discussion

10.	Potential is defined as work done from bringing a unit charge from a specific point to a point in the electric field without producing acceleration. In this definition why there is no acceleration involved. Explain.
Answer» Potential is defined as work done from bringing a unit charge from a specific point to a point in the electric field without producing acceleration. In this definition why there is no acceleration involved. Explain.

Discussion

11.	Statement 1: Stars twinkle but planets do not. Statement 2: Stars have their own light but a planet does not.
Answer» Statement 1: Stars twinkle but planets do not. Statement 2: Stars have their own light but a planet does not.

11.

Statement 1: Stars twinkle but planets do not. Statement 2: Stars have their own light but a planet does not.

Answer»

Statement 1: Stars twinkle but planets do not.

Statement 2: Stars have their own light but a planet does not.

Discussion

12.	A and B represent the displacement-distance graphs for two sound waves when they pass through air. Find the ratio between their loudness. fig A fig B
Answer» A and B represent the displacement-distance graphs for two sound waves when they pass through air. Find the ratio between their loudness. fig A fig B

Discussion

13.	In which is thermionic work function measured? How is it related is it related to the S.I. unit of this quantity?
Answer» In which is thermionic work function measured? How is it related is it related to the S.I. unit of this quantity?

Discussion

14.	Name the eye defect in which lens becomes opaque and the amount of light entering is reduced. Enter 1 word only.__
Answer» Name the eye defect in which lens becomes opaque and the amount of light entering is reduced. Enter 1 word only. __

14.

Name the eye defect in which lens becomes opaque and the amount of light entering is reduced. Enter 1 word only.__

Answer»

Name the eye defect in which lens becomes opaque and the amount of light entering is reduced.

Enter 1 word only.

__

Discussion

15.	Which type of lever has a mechanical advantage always more than 1 ? Give reason with one example. What change can be made in this lever to increase its mechanical advantage ?
Answer» Which type of lever has a mechanical advantage always more than 1 ? Give reason with one example. What change can be made in this lever to increase its mechanical advantage ?

Discussion

16.	A 10 cm tall candle when viewed using a convex lens appears to be 30 cm tall as shown in the below figure. The focal length of the lens is 5 cm. The magnitude of distance of the object is _________ cm. 3.33
Answer» A $10 c m$ tall candle when viewed using a convex lens appears to be $30 c m$ tall as shown in the below figure. The focal length of the lens is $5 c m$ . The magnitude of distance of the object is _________ $c m$ . 3.33

16.

A 10 cm tall candle when viewed using a convex lens appears to be 30 cm tall as shown in the below figure. The focal length of the lens is 5 cm. The magnitude of distance of the object is _________ cm. 3.33

Answer»

A $10 c m$ tall candle when viewed using a convex lens appears to be $30 c m$ tall as shown in the below figure. The focal length of the lens is $5 c m$ . The magnitude of distance of the object is _________ $c m$ .

3.33

Discussion

17.	How is loudness of sound related to the intensity of wave producing it ?
Answer» How is loudness of sound related to the intensity of wave producing it ?

Discussion

18.	The inference/ inferences that you can get from the following atomic model:-
Answer» The inference/ inferences that you can get from the following atomic model:-

18.

The inference/ inferences that you can get from the following atomic model:-

Answer»

The inference/ inferences that you can get from the following atomic model:-

Discussion

19.	Bending of light from its original path while traveling from one medium to another is called:
Answer» Bending of light from its original path while traveling from one medium to another is called:

Discussion

20.	The power of a lens is -2.0 D. Find its focal length and its kind.
Answer» The power of a lens is -2.0 D. Find its focal length and its kind.

Discussion

21.	Define focus
Answer» Define focus

Discussion

22.	Explain how tribals are dependent on forests. [2 MARKS]
Answer» Explain how tribals are dependent on forests. [2 MARKS]

Discussion

23.	What is the purpose of earthing an electrical appliance?
Answer» What is the purpose of earthing an electrical appliance?

Discussion

24.	A body is moved in a direction opposite to the direction of force acting on it. State whether the work is done by the force or work is done against the force.
Answer» A body is moved in a direction opposite to the direction of force acting on it. State whether the work is done by the force or work is done against the force.

Discussion

25.	A wire of resistance 2 Ω is stretched to double its length such that its volume remains constant. What is the resistance of the stretched wire?8
Answer» A wire of resistance $2 Ω$ is stretched to double its length such that its volume remains constant. What is the resistance of the stretched wire? 8

Discussion

26.	What do you mean by the power rating of an electrical appliance?
Answer» What do you mean by the power rating of an electrical appliance?

Discussion

27.	The wavelengths for the light of red and blue colors are nearly 7.8×10−7m and 4.8×10−7m respectively. (a) Which color has the greater speed in a vacuum? (b) Which color has the greater speed in glass?
Answer» The wavelengths for the light of red and blue colors are nearly $7.8 \times 10^{- 7} m$ and $4.8 \times 10^{- 7} m$ respectively. (a) Which color has the greater speed in a vacuum? (b) Which color has the greater speed in glass?

27.

The wavelengths for the light of red and blue colors are nearly 7.8×10−7m and 4.8×10−7m respectively. (a) Which color has the greater speed in a vacuum? (b) Which color has the greater speed in glass?

Answer»

The wavelengths for the light of red and blue colors are nearly $7.8 \times 10^{- 7} m$ and $4.8 \times 10^{- 7} m$ respectively.

(a) Which color has the greater speed in a vacuum?

(b) Which color has the greater speed in glass?

Discussion

28.	Angle of reflection is always______ angle of incidence.
Answer» Angle of reflection is always______ angle of incidence.

Discussion

29.	Two plane mirrors are inclined to one another at an angle of 40∘. A point object is placed in between them. The number of images formed due to reflection at both mirrors is
Answer» Two plane mirrors are inclined to one another at an angle of $40^{\circ}$ . A point object is placed in between them. The number of images formed due to reflection at both mirrors is

Discussion

30.	Two masses of 5kg and 10kg are connected to a pulley as shown. What will be the acceleration of the system (g=acceleration due to gravity)
Answer» Two masses of 5kg and 10kg are connected to a pulley as shown. What will be the acceleration of the system (g=acceleration due to gravity)

30.

Two masses of 5kg and 10kg are connected to a pulley as shown. What will be the acceleration of the system (g=acceleration due to gravity)

Answer»

Two masses of 5kg and 10kg are connected to a pulley as shown. What will be the acceleration of the system (g=acceleration due to gravity)

Discussion

31.	Refractive index of glass is 32. A ray of light travelling in glass is incident on glass-water surface at an angle 30° with normal. Will it be able to come out into the water. Refractive index of water = 43.
Answer» Refractive index of glass is $\frac{3}{2}$ . A ray of light travelling in glass is incident on glass-water surface at an angle 30° with normal. Will it be able to come out into the water. Refractive index of water = $\frac{4}{3}$ .

Discussion

32.	A straight conductor AB is held parallel to a freely suspended magnetic needle, such that the current flows from A to B. Why dose the magentic needle show deflection?
Answer» A straight conductor AB is held parallel to a freely suspended magnetic needle, such that the current flows from A to B. Why dose the magentic needle show deflection?

32.

A straight conductor AB is held parallel to a freely suspended magnetic needle, such that the current flows from A to B. Why dose the magentic needle show deflection?

Answer»

A straight conductor AB is held parallel to a freely suspended magnetic needle, such that the current flows from A to B. Why dose the magentic needle show deflection?

Discussion

33.	1. Why potential difference exists across three resistor connected in parallel arrangement to a battery .
Answer» 1. Why potential difference exists across three resistor connected in parallel arrangement to a battery .

Discussion

34.	How to control the speed of the electric motor
Answer» How to control the speed of the electric motor

Discussion

35.	A house hold use one heater of rated power 1000w for 1 hour a day, five bulbs of power 40w used for 5 hours a day and the fan of rated power 100w used for 10 hours a day. Find the number of units of electirical energy consumed in 10 days.
Answer» A house hold use one heater of rated power 1000w for 1 hour a day, five bulbs of power 40w used for 5 hours a day and the fan of rated power 100w used for 10 hours a day. Find the number of units of electirical energy consumed in 10 days.

Discussion

36.	Why is shell type transformer used in transmitters and receivers ?
Answer» Why is shell type transformer used in transmitters and receivers ?

Discussion

37.	1. Two conducting wires of the same material and equal lengths and equal diameters are first connected in series and then in parallel in a circuit across the same potential difference . What is the ratio of heat produce in series and parallel combinations?
Answer» 1. Two conducting wires of the same material and equal lengths and equal diameters are first connected in series and then in parallel in a circuit across the same potential difference . What is the ratio of heat produce in series and parallel combinations?

Discussion

38.	The dark old room was closed for a long time but once the curtains were removed slightly, the sunlight entered the room and whole of the room got illuminated. The effect by which the whole room gets illuminated is known as?
Answer» The dark old room was closed for a long time but once the curtains were removed slightly, the sunlight entered the room and whole of the room got illuminated. The effect by which the whole room gets illuminated is known as?

Discussion

39.	The radius of curvature of a concave mirror is 10 cm. At what distance from the pole of the mirror would an image of the sun be formed?
Answer» The radius of curvature of a concave mirror is $10 c m$ . At what distance from the pole of the mirror would an image of the sun be formed?

Discussion

40.	Where is the image formed in the eye?
Answer» Where is the image formed in the eye?

Discussion

41.	Keeping the p.d. constant, the resistance of the circuit is halved. The current will become. (a) One-fourth (b) four times (c) half (d) double
Answer» Keeping the p.d. constant, the resistance of the circuit is halved. The current will become. (a) One-fourth (b) four times (c) half (d) double

Discussion

42.	In the circuit shown in figure, the steady state voltage drop across the capacitor is :
Answer» In the circuit shown in figure, the steady state voltage drop across the capacitor is :

Discussion

43.	Question 7 The values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given below − Plot a graph between V and I and calculate the resistance of that resistor.
Answer» Question 7 The values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given below − Plot a graph between V and I and calculate the resistance of that resistor.

Discussion

44.	What is astigmatism and what are its effects
Answer» What is astigmatism and what are its effects

Discussion

45.	The human eye act as ___ lens.
Answer» The human eye act as ___ lens.

Discussion

46.	All electromagnetic waves:
Answer» All electromagnetic waves:

Discussion

47.	How does the melting point of ice change with a change in atmospheric pressure?
Answer» How does the melting point of ice change with a change in atmospheric pressure?

Discussion

48.	A wire of uniform cross-section and length l has a resistance of 4 ohms. The wire is cut into 4 equal pieces. Each piece is then stretched to length l. Thereafter, the four wires are joined in parallel. Calculate net resistance.
Answer» A wire of uniform cross-section and length l has a resistance of 4 ohms. The wire is cut into 4 equal pieces. Each piece is then stretched to length l. Thereafter, the four wires are joined in parallel. Calculate net resistance.

Discussion

49.	How to represent electrons???? e or ē I already posted this question and received answer to be e- I am still doubted Isn't it ē
Answer» How to represent electrons???? e or ē I already posted this question and received answer to be e- I am still doubted Isn't it ē

49.

How to represent electrons???? e or ē I already posted this question and received answer to be e- I am still doubted Isn't it ē

Answer»

How to represent electrons???? e or ē

I already posted this question and received answer to be e-

I am still doubted

Isn't it ē

Discussion

50.	Why AC current is used for transmission of electricity over long distance.
Answer» Why AC current is used for transmission of electricity over long distance.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Rakesh wanted to do the prism experiment, he took a prism and passed a monochromatic light through the prism. Which of the following phenomenon would be observed?

A window air conditioner is brought into the center of a dorm room and turned on. After several minutes, the temperature of the room:

How can overloading occur in a circuit when many appliances are connected to a single socket?

Calculate the ratio of intensity or loudness of 2 waves having amplitudes in the ratio 4: 9

Draw ray diagrams showing the image formation by a convex lens when an object is placed (a) between optical centre and focus of the lens (b) between focus and twice the focal length of the lens (c) at twice the focal length of the lens (d) at infinity (e) at the focus of the lens

In the following circuit the equivalent resistance between A and B is

The three types of radioactivity in increasing order of penetrating power are?

electricity is the flow of electrons and in byjus video they said electrons revolve around protons and neutons(nucleus) how can electrons move in a direction when protons are attracting them and if protons move along with electron they dont generate electricity as stated in Byjus video.

Potential is defined as work done from bringing a unit charge from a specific point to a point in the electric field without producing acceleration. In this definition why there is no acceleration involved. Explain.

Statement 1: Stars twinkle but planets do not. Statement 2: Stars have their own light but a planet does not.

A and B represent the displacement-distance graphs for two sound waves when they pass through air. Find the ratio between their loudness. fig A fig B

In which is thermionic work function measured? How is it related is it related to the S.I. unit of this quantity?

Name the eye defect in which lens becomes opaque and the amount of light entering is reduced. Enter 1 word only.__

Which type of lever has a mechanical advantage always more than 1 ? Give reason with one example. What change can be made in this lever to increase its mechanical advantage ?

A 10 cm tall candle when viewed using a convex lens appears to be 30 cm tall as shown in the below figure. The focal length of the lens is 5 cm. The magnitude of distance of the object is _________ cm. 3.33

How is loudness of sound related to the intensity of wave producing it ?

The inference/ inferences that you can get from the following atomic model:-

Bending of light from its original path while traveling from one medium to another is called:

The power of a lens is -2.0 D. Find its focal length and its kind.

Define focus

Explain how tribals are dependent on forests. [2 MARKS]

What is the purpose of earthing an electrical appliance?

A body is moved in a direction opposite to the direction of force acting on it. State whether the work is done by the force or work is done against the force.

A wire of resistance 2 Ω is stretched to double its length such that its volume remains constant. What is the resistance of the stretched wire?8

What do you mean by the power rating of an electrical appliance?

The wavelengths for the light of red and blue colors are nearly 7.8×10−7m and 4.8×10−7m respectively. (a) Which color has the greater speed in a vacuum? (b) Which color has the greater speed in glass?

Angle of reflection is always______ angle of incidence.

Two plane mirrors are inclined to one another at an angle of 40∘. A point object is placed in between them. The number of images formed due to reflection at both mirrors is

Two masses of 5kg and 10kg are connected to a pulley as shown. What will be the acceleration of the system (g=acceleration due to gravity)

Refractive index of glass is 32. A ray of light travelling in glass is incident on glass-water surface at an angle 30° with normal. Will it be able to come out into the water. Refractive index of water = 43.

A straight conductor AB is held parallel to a freely suspended magnetic needle, such that the current flows from A to B. Why dose the magentic needle show deflection?

1. Why potential difference exists across three resistor connected in parallel arrangement to a battery .

How to control the speed of the electric motor

A house hold use one heater of rated power 1000w for 1 hour a day, five bulbs of power 40w used for 5 hours a day and the fan of rated power 100w used for 10 hours a day. Find the number of units of electirical energy consumed in 10 days.

Why is shell type transformer used in transmitters and receivers ?

1. Two conducting wires of the same material and equal lengths and equal diameters are first connected in series and then in parallel in a circuit across the same potential difference . What is the ratio of heat produce in series and parallel combinations?

The dark old room was closed for a long time but once the curtains were removed slightly, the sunlight entered the room and whole of the room got illuminated. The effect by which the whole room gets illuminated is known as?

The radius of curvature of a concave mirror is 10 cm. At what distance from the pole of the mirror would an image of the sun be formed?

Where is the image formed in the eye?

Keeping the p.d. constant, the resistance of the circuit is halved. The current will become. (a) One-fourth (b) four times (c) half (d) double

In the circuit shown in figure, the steady state voltage drop across the capacitor is :

Question 7 The values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given below − Plot a graph between V and I and calculate the resistance of that resistor.

What is astigmatism and what are its effects

The human eye act as ___ lens.

All electromagnetic waves:

How does the melting point of ice change with a change in atmospheric pressure?

A wire of uniform cross-section and length l has a resistance of 4 ohms. The wire is cut into 4 equal pieces. Each piece is then stretched to length l. Thereafter, the four wires are joined in parallel. Calculate net resistance.

How to represent electrons???? e or ē I already posted this question and received answer to be e- I am still doubted Isn't it ē

Why AC current is used for transmission of electricity over long distance.