16569 + Interview Questions in Physics

1.	The value of angle of deviation produced by a prism varies with Wavelength of incident light as follows:
Answer» The value of angle of deviation produced by a prism varies with Wavelength of incident light as follows:

Discussion

2.	An AC generator is connected to an electrical appliance. In 10 revolutions of the armature the current in the appliance changes direction:
Answer» An AC generator is connected to an electrical appliance. In 10 revolutions of the armature the current in the appliance changes direction:

Discussion

3.	If a magnification of, -1 is to be obtained by using a converging lens of focal length 12 cm, then the object must be placed : (a) within 12 cm (b) at 24 cm (c) at 6 cm (d) beyond 24 cm
Answer» If a magnification of, -1 is to be obtained by using a converging lens of focal length 12 cm, then the object must be placed : (a) within 12 cm (b) at 24 cm (c) at 6 cm (d) beyond 24 cm

Discussion

4.	(a) With the help of a circuit diagram, obtain the relation for the equivalent resistance of two resistances connected in parallel. (b) IN the circuit diagram shown below, find: (i) Total resistance. (ii) Current shown by the ammeter A
Answer» (a) With the help of a circuit diagram, obtain the relation for the equivalent resistance of two resistances connected in parallel. (b) IN the circuit diagram shown below, find: (i) Total resistance. (ii) Current shown by the ammeter A

Discussion

5.	what is name of the rectifier shown in figure and is dode d1 forward biased or reverse biased when point A is at higher potential than point B
Answer» what is name of the rectifier shown in figure and is dode d1 forward biased or reverse biased when point A is at higher potential than point B

Discussion

6.	The kinetic energy of a body of mass 0.5 kg and momentum 30 kgms−1 is ___ J.
Answer» The kinetic energy of a body of mass $0.5 k g$ and momentum $30 k g m s^{- 1}$ is ___ J.

Discussion

7.	Out of the following, the colour of light having the maximum wavelength is : (a) violet (b) indigo (c) green (d) orange
Answer» Out of the following, the colour of light having the maximum wavelength is : (a) violet (b) indigo (c) green (d) orange

Discussion

8.	Three samples of the same gas A,B and C each of γ=32 have initially equal volume. Now the volume of each sample is doubled. The process is adiabatic for A, isobaric for B and isothermal for C. If the final pressures are equal for all three samples, the ratio of their initial pressures are
Answer» Three samples of the same gas $A, B$ and $C$ each of $γ = \frac{3}{2}$ have initially equal volume. Now the volume of each sample is doubled. The process is adiabatic for $A$ , isobaric for $B$ and isothermal for $C$ . If the final pressures are equal for all three samples, the ratio of their initial pressures are

Discussion

9.	What is the relation between escape velocity and orbital velocity?
Answer» What is the relation between escape velocity and orbital velocity?

Discussion

10.	A piece of wire having resistance 'R' is cut into four equal parts. a) How does the resistance of each part compare with the original resistance? b) If the four are placed in parallel, how will the resistance of combination compare with the resistance of the original wire.
Answer» A piece of wire having resistance 'R' is cut into four equal parts. a) How does the resistance of each part compare with the original resistance? b) If the four are placed in parallel, how will the resistance of combination compare with the resistance of the original wire.

10.

A piece of wire having resistance 'R' is cut into four equal parts. a) How does the resistance of each part compare with the original resistance? b) If the four are placed in parallel, how will the resistance of combination compare with the resistance of the original wire.

Answer»

A piece of wire having resistance 'R' is cut into four equal parts.

a) How does the resistance of each part compare with the original resistance?

b) If the four are placed in parallel, how will the resistance of combination compare with the resistance of the original wire.

Discussion

11.	Four wires, each of the same length, diameter and material are connected to each other to form a square. If the resistance of each wire is R, the equivalent resistance across the opposite corners is:
Answer» Four wires, each of the same length, diameter and material are connected to each other to form a square. If the resistance of each wire is R, the equivalent resistance across the opposite corners is:

Discussion

12.	An object is placed at a distance at a distance of 10 cm in front of a concave lens of focal length 10 cm. Find the linear magnification of the lens?
Answer» An object is placed at a distance at a distance of $10 c m$ in front of a concave lens of focal length $10 c m$ . Find the linear magnification of the lens?

Discussion

13.	An oil tanker explodes in the sea. At that instant, an aircraft and a submarine were present vertically above and below the oil tanker respectively at equal distances from it. Find the ratio of the time taken by sound waves to reach them. (Speed of sound in air = 340 m/s. The speed of sound in seawater = 1520 m/s)
Answer» An oil tanker explodes in the sea. At that instant, an aircraft and a submarine were present vertically above and below the oil tanker respectively at equal distances from it. Find the ratio of the time taken by sound waves to reach them. (Speed of sound in air = 340 m/s. The speed of sound in seawater = 1520 m/s)

Discussion

14.	Explain why does a metal wire when connected to a cell offer resistance to the flow of current.
Answer» Explain why does a metal wire when connected to a cell offer resistance to the flow of current.

Discussion

15.	Majorly the equilibrim is classified into _____ types.
Answer» Majorly the equilibrim is classified into _____ types.

Discussion

16.	If the length of a wire is halved and the cross-sectional area doubled, what will be the effect on resistance?
Answer» If the length of a wire is halved and the cross-sectional area doubled, what will be the effect on resistance?

Discussion

17.	(a) What is an electric motor ? With the help of a labelled diagram, describe the working of a simple electric motor. (b) What are the special features of commercial electric motors ?
Answer» (a) What is an electric motor ? With the help of a labelled diagram, describe the working of a simple electric motor. (b) What are the special features of commercial electric motors ?

17.

(a) What is an electric motor ? With the help of a labelled diagram, describe the working of a simple electric motor. (b) What are the special features of commercial electric motors ?

Answer»

(a) What is an electric motor ? With the help of a labelled diagram, describe the working of a simple electric motor.

(b) What are the special features of commercial electric motors ?

Discussion

18.	If a Hydrogen nucleus is completely converted into energy, the energy produced will be around?
Answer» If a Hydrogen nucleus is completely converted into energy, the energy produced will be around?

Discussion

19.	In how much time (in seconds) should a charge of 10 C flow through a point in the conductor so as to maintain a constant current of 100 A?
Answer» In how much time (in seconds) should a charge of $10 C$ flow through a point in the conductor so as to maintain a constant current of $100 A$ ?

Discussion

20.	In the electric circuit shown in Fig.9.16, label the parts A, B, C, D, E, and F. State the function of each part. Show in the diagram the direction of flow of current.
Answer» In the electric circuit shown in Fig.9.16, label the parts A, B, C, D, E, and F. State the function of each part. Show in the diagram the direction of flow of current.

20.

In the electric circuit shown in Fig.9.16, label the parts A, B, C, D, E, and F. State the function of each part. Show in the diagram the direction of flow of current.

Answer»

In the electric circuit shown in Fig.9.16, label the parts A, B, C, D, E, and F. State the function of each part. Show in the diagram the direction of flow of current.

Discussion

21.	what happens if angle vision is greater than 60°
Answer» what happens if angle vision is greater than 60°

Discussion

22.	An object in a denser medium when viewed from a rearer medium appears to be raised.The shift is maximum for which colour of light.
Answer» An object in a denser medium when viewed from a rearer medium appears to be raised.The shift is maximum for which colour of light.

Discussion

23.	A car of mass 1200 kg is moving along a straight line with a uniform velocity of 90 kmph. Its velocity is slowed down to 18 kmph in 4 s by an unbalanced external force. Calculate the change in momentum and the magnitude of the force required. [3 MARKS]
Answer» A car of mass 1200 kg is moving along a straight line with a uniform velocity of 90 $k m p h$ . Its velocity is slowed down to 18 $k m p h$ in 4 s by an unbalanced external force. Calculate the change in momentum and the magnitude of the force required. [3 MARKS]

Discussion

24.	Question 2 Which of the following terms does not represent electrical power in a circuit? (a) I2R (b) IR2 (c) VI (d) V2R
Answer» Question 2 Which of the following terms does not represent electrical power in a circuit? (a) $I^{2} R$ (b) $I R^{2}$ (c) VI (d) $\frac{V^{2}}{R}$

Discussion

25.	What is the meaning of F=qE
Answer» What is the meaning of F=qE

Discussion

26.	Name the original source of wind energy.
Answer» Name the original source of wind energy.

Discussion

27.	What is electromagnetic induction
Answer» What is electromagnetic induction

Discussion

28.	What is the difference between potential difference and potential difference across 2 points?
Answer» What is the difference between potential difference and potential difference across 2 points?

Discussion

29.	After the Arabari Sal forests in West Bengal were reclaimed what was their estimated value in crores in 1983? ___
Answer» After the Arabari Sal forests in West Bengal were reclaimed what was their estimated value in crores in 1983? ___

29.

After the Arabari Sal forests in West Bengal were reclaimed what was their estimated value in crores in 1983? ___

Answer»

After the Arabari Sal forests in West Bengal were reclaimed what was their estimated value in crores in 1983?

___

Discussion

30.	in our supply current of our houses we know that the current sometimes increases so we have put fuses and mcbs as protection can voltage ever increase in place of current
Answer» in our supply current of our houses we know that the current sometimes increases so we have put fuses and mcbs as protection can voltage ever increase in place of current

Discussion

31.	What happens when a current carrying conducter is placed in a magnetic field?
Answer» What happens when a current carrying conducter is placed in a magnetic field?

Discussion

32.	What is the difference between least distance of distinct vision and near point?
Answer» What is the difference between least distance of distinct vision and near point?

Discussion

33.	What do you understand by the natural vibrations of a body ? Give one example.
Answer» What do you understand by the natural vibrations of a body ? Give one example.

Discussion

34.	The lens of a Hypermetropic person is _________ in the middle.
Answer» The lens of a Hypermetropic person is _________ in the middle.

Discussion

35.	What is the value of the focal length of plane mirror
Answer» What is the value of the focal length of plane mirror

Discussion

36.	How could we use the principle of electromagnetic induction in case of using ATM card when its magnetic strip is swiped through a scanner?
Answer» How could we use the principle of electromagnetic induction in case of using ATM card when its magnetic strip is swiped through a scanner?

Discussion

37.	When a bulb of resistance 1 Ω is connected across a battery, it draws a constant power of 400 W. What is the total power drawn when 4 such bulbs are connected in series across the same battery?
Answer» When a bulb of resistance $1 Ω$ is connected across a battery, it draws a constant power of $400 W$ . What is the total power drawn when $4$ such bulbs are connected in series across the same battery?

Discussion

38.	Give one example of a good domestic fuel.
Answer» Give one example of a good domestic fuel.

Discussion

39.	Thermal resistivity is the ___of thermal conductivity.
Answer» Thermal resistivity is the ___of thermal conductivity.

Discussion

40.	Give one example to show how the participation of local people can lead to the efficient conservation of forests.
Answer» Give one example to show how the participation of local people can lead to the efficient conservation of forests.

Discussion

41.	A machine lifts a load of 200 kg in a vertically upward direction. If the machine is driven by a freely falling mass of 40 kg through a distance of 8 m in 4 s, calculate power intput of machine.[Take g =10ms–2]
Answer» A machine lifts a load of 200 kg in a vertically upward direction. If the machine is driven by a freely falling mass of 40 kg through a distance of 8 m in 4 s, calculate power intput of machine.[Take g =10ms^–2]

Discussion

42.	An object is moved closer to an eye. What changes must take place in the eye in order to keep the image in sharp focus ?
Answer» An object is moved closer to an eye. What changes must take place in the eye in order to keep the image in sharp focus ?

Discussion

43.	In Fig. 4.67, a ray of light PQ is incident normally on the face AB of an equilateral glass prism. Complete the ray diagram showing its emergence into air after passing through the prism. Take critical angle for glass = 42∘. (a) Write the angles of incidence at the faces AB and AC of the prism. (b) Name the phenomenon which the ray of light suffers at the face AB, AC and BC of the prism.
Answer» In Fig. 4.67, a ray of light PQ is incident normally on the face AB of an equilateral glass prism. Complete the ray diagram showing its emergence into air after passing through the prism. Take critical angle for glass = $42^{\circ}$ . (a) Write the angles of incidence at the faces AB and AC of the prism. (b) Name the phenomenon which the ray of light suffers at the face AB, AC and BC of the prism.

43.

In Fig. 4.67, a ray of light PQ is incident normally on the face AB of an equilateral glass prism. Complete the ray diagram showing its emergence into air after passing through the prism. Take critical angle for glass = 42∘. (a) Write the angles of incidence at the faces AB and AC of the prism. (b) Name the phenomenon which the ray of light suffers at the face AB, AC and BC of the prism.

Answer»

In Fig. 4.67, a ray of light PQ is incident normally on the face AB of an equilateral glass prism. Complete the ray diagram showing its emergence into air after passing through the prism. Take critical angle for glass = $42^{\circ}$ .

(a) Write the angles of incidence at the faces AB and AC of the prism.

(b) Name the phenomenon which the ray of light suffers at the face AB, AC and BC of the prism.

Discussion

44.	In which wire in an A. C. housing circuit is the switch introduced to operate the lights ?
Answer» In which wire in an A. C. housing circuit is the switch introduced to operate the lights ?

Discussion

45.	Which of the following combinations of length(l) and diameter(d) of cross-section of a wire will give us minimum resistance?
Answer» Which of the following combinations of length(l) and diameter(d) of cross-section of a wire will give us minimum resistance?

Discussion

46.	Two resistors when in series have an effective resistance of 25 Ω & when in parallel have an effective resistance of 4 Ω. Calculate the value of individual resistances.
Answer» Two resistors when in series have an effective resistance of 25 Ω & when in parallel have an effective resistance of 4 Ω. Calculate the value of individual resistances.

Discussion

47.	Differentiate between watt and watt hour.
Answer» Differentiate between watt and watt hour.

Discussion

48.	Both a pair of scissors and a pair of pliers belong to the same class of levers. Name the class of lever. Which one has the mechanical advantage less than 1 ?
Answer» Both a pair of scissors and a pair of pliers belong to the same class of levers. Name the class of lever. Which one has the mechanical advantage less than 1 ?

Discussion

49.	Tony Stark wants to build an engine to propel his Iron Man suit; he wants to achieve an efficiency of 1.5 to make the suit lighter and faster! Which of the following laws of physics would he be violating?
Answer» Tony Stark wants to build an engine to propel his Iron Man suit; he wants to achieve an efficiency of 1.5 to make the suit lighter and faster! Which of the following laws of physics would he be violating?

Discussion

50.	Which of the following options can a ray of light undergo?
Answer» Which of the following options can a ray of light undergo?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The value of angle of deviation produced by a prism varies with Wavelength of incident light as follows:

An AC generator is connected to an electrical appliance. In 10 revolutions of the armature the current in the appliance changes direction:

If a magnification of, -1 is to be obtained by using a converging lens of focal length 12 cm, then the object must be placed : (a) within 12 cm (b) at 24 cm (c) at 6 cm (d) beyond 24 cm

(a) With the help of a circuit diagram, obtain the relation for the equivalent resistance of two resistances connected in parallel. (b) IN the circuit diagram shown below, find: (i) Total resistance. (ii) Current shown by the ammeter A

what is name of the rectifier shown in figure and is dode d1 forward biased or reverse biased when point A is at higher potential than point B

The kinetic energy of a body of mass 0.5 kg and momentum 30 kgms−1 is ___ J.

Out of the following, the colour of light having the maximum wavelength is : (a) violet (b) indigo (c) green (d) orange

Three samples of the same gas A,B and C each of γ=32 have initially equal volume. Now the volume of each sample is doubled. The process is adiabatic for A, isobaric for B and isothermal for C. If the final pressures are equal for all three samples, the ratio of their initial pressures are

What is the relation between escape velocity and orbital velocity?

A piece of wire having resistance 'R' is cut into four equal parts. a) How does the resistance of each part compare with the original resistance? b) If the four are placed in parallel, how will the resistance of combination compare with the resistance of the original wire.

Four wires, each of the same length, diameter and material are connected to each other to form a square. If the resistance of each wire is R, the equivalent resistance across the opposite corners is:

An object is placed at a distance at a distance of 10 cm in front of a concave lens of focal length 10 cm. Find the linear magnification of the lens?

Explain why does a metal wire when connected to a cell offer resistance to the flow of current.

Majorly the equilibrim is classified into _____ types.

If the length of a wire is halved and the cross-sectional area doubled, what will be the effect on resistance?

(a) What is an electric motor ? With the help of a labelled diagram, describe the working of a simple electric motor. (b) What are the special features of commercial electric motors ?

If a Hydrogen nucleus is completely converted into energy, the energy produced will be around?

In how much time (in seconds) should a charge of 10 C flow through a point in the conductor so as to maintain a constant current of 100 A?

In the electric circuit shown in Fig.9.16, label the parts A, B, C, D, E, and F. State the function of each part. Show in the diagram the direction of flow of current.

what happens if angle vision is greater than 60°

An object in a denser medium when viewed from a rearer medium appears to be raised.The shift is maximum for which colour of light.

A car of mass 1200 kg is moving along a straight line with a uniform velocity of 90 kmph. Its velocity is slowed down to 18 kmph in 4 s by an unbalanced external force. Calculate the change in momentum and the magnitude of the force required. [3 MARKS]

Question 2 Which of the following terms does not represent electrical power in a circuit? (a) I2R (b) IR2 (c) VI (d) V2R

What is the meaning of F=qE

Name the original source of wind energy.

What is electromagnetic induction

What is the difference between potential difference and potential difference across 2 points?

After the Arabari Sal forests in West Bengal were reclaimed what was their estimated value in crores in 1983? ___

in our supply current of our houses we know that the current sometimes increases so we have put fuses and mcbs as protection can voltage ever increase in place of current

What happens when a current carrying conducter is placed in a magnetic field?

What is the difference between least distance of distinct vision and near point?

What do you understand by the natural vibrations of a body ? Give one example.

The lens of a Hypermetropic person is _________ in the middle.

What is the value of the focal length of plane mirror

How could we use the principle of electromagnetic induction in case of using ATM card when its magnetic strip is swiped through a scanner?

When a bulb of resistance 1 Ω is connected across a battery, it draws a constant power of 400 W. What is the total power drawn when 4 such bulbs are connected in series across the same battery?

Give one example of a good domestic fuel.

Thermal resistivity is the ___of thermal conductivity.

Give one example to show how the participation of local people can lead to the efficient conservation of forests.

A machine lifts a load of 200 kg in a vertically upward direction. If the machine is driven by a freely falling mass of 40 kg through a distance of 8 m in 4 s, calculate power intput of machine.[Take g =10ms–2]

An object is moved closer to an eye. What changes must take place in the eye in order to keep the image in sharp focus ?

In which wire in an A. C. housing circuit is the switch introduced to operate the lights ?

Which of the following combinations of length(l) and diameter(d) of cross-section of a wire will give us minimum resistance?

Two resistors when in series have an effective resistance of 25 Ω &amp; when in parallel have an effective resistance of 4 Ω. Calculate the value of individual resistances.

Differentiate between watt and watt hour.

Both a pair of scissors and a pair of pliers belong to the same class of levers. Name the class of lever. Which one has the mechanical advantage less than 1 ?

Tony Stark wants to build an engine to propel his Iron Man suit; he wants to achieve an efficiency of 1.5 to make the suit lighter and faster! Which of the following laws of physics would he be violating?

Which of the following options can a ray of light undergo?

Two resistors when in series have an effective resistance of 25 Ω & when in parallel have an effective resistance of 4 Ω. Calculate the value of individual resistances.