16569 + Interview Questions in Physics

1.	The substances whose resistivity lies between those of conductors and insulators are called ................ . __
Answer» The substances whose resistivity lies between those of conductors and insulators are called ................ . __

Discussion

2.	Question 11 Explain why the planets do not twinkle?
Answer» Question 11 Explain why the planets do not twinkle?

Discussion

3.	Which among the following equations give the correct relation between resistance(R), length of the conductor(L) and area of cross-section of the conductor(A)?
Answer» Which among the following equations give the correct relation between resistance(R), length of the conductor(L) and area of cross-section of the conductor(A)?

Discussion

4.	The refractive index of diamond is much greater than that of ordinary glass. Is this fact of some use to a diamond-cutter? [3 MARKS]
Answer» The refractive index of diamond is much greater than that of ordinary glass. Is this fact of some use to a diamond-cutter? [3 MARKS]

Discussion

5.	A physical balance has its arms of length 60 cm and 40 cm. What weight kept on pan of longer arm will balance an object of weight 100 gf kept on other pan ?
Answer» A physical balance has its arms of length 60 cm and 40 cm. What weight kept on pan of longer arm will balance an object of weight 100 gf kept on other pan ?

Discussion

6.	A nut is opened by a wrench of length 10 cm. If the least force required is 5.0 N, find the moment of force needed to turn the nut.
Answer» A nut is opened by a wrench of length 10 cm. If the least force required is 5.0 N, find the moment of force needed to turn the nut.

Discussion

7.	If a person can see distant objects clearly, but cannot see nearby objects clearly, then the person is said to be affected from which of the following defects.
Answer» If a person can see distant objects clearly, but cannot see nearby objects clearly, then the person is said to be affected from which of the following defects.

Discussion

8.	If the radius of curvature of a spherical mirror is 34.52 cm, then the focal length of that spherical mirror is
Answer» If the radius of curvature of a spherical mirror is 34.52 cm, then the focal length of that spherical mirror is

Discussion

9.	Drop of water behaves likes a
Answer» Drop of water behaves likes a

Discussion

10.	Select the statements that are true.
Answer» Select the statements that are true.

Discussion

11.	Think about a moving coil microphone. Then, with reference to it, pick out the odd one from the following given options.
Answer» Think about a moving coil microphone. Then, with reference to it, pick out the odd one from the following given options.

Discussion

12.	In the given electric circuit if the current flowing through 3 Ω resistor is 1 A, find the voltage of the battery and the current I drawn from it.
Answer» In the given electric circuit if the current flowing through 3 $Ω$ resistor is 1 A, find the voltage of the battery and the current I drawn from it.

Discussion

13.	On the Celsius scale the absolute zero of temperature is at___ Degree Celsius.
Answer» On the Celsius scale the absolute zero of temperature is at___ Degree Celsius.

Discussion

14.	Name and state the principle of a simple a.c.generator. What is its use?
Answer» Name and state the principle of a simple a.c.generator. What is its use?

Discussion

15.	A tank of water is viewed normally from above. (a) State how does the depth of tank appear to change. (b) Draw a labeled ray diagram to explain your answer.
Answer» A tank of water is viewed normally from above. (a) State how does the depth of tank appear to change. (b) Draw a labeled ray diagram to explain your answer.

Discussion

16.	Choose the statements which are true among the following.
Answer» Choose the statements which are true among the following.

Discussion

17.	How is the boiling point of water affected when some salt is added to it?
Answer» How is the boiling point of water affected when some salt is added to it?

17.

How is the boiling point of water affected when some salt is added to it?

Answer»

How is the boiling point of water affected when some salt is added to it?

Discussion

18.	Insulator have ............... free electrons. __
Answer» Insulator have ............... free electrons. __

Discussion

19.	Question 1 A cell, a resistor, a key and an ammeter are arranged as shown in the circuit diagrams given below. The current recorded in the ammeter will be (a) maximum in (i) (b) maximum in (ii) (c) maximum in (iii) (d) same in all the cases
Answer» Question 1 A cell, a resistor, a key and an ammeter are arranged as shown in the circuit diagrams given below. The current recorded in the ammeter will be (a) maximum in (i) (b) maximum in (ii) (c) maximum in (iii) (d) same in all the cases

Discussion

20.	The arm of an electric generator with split rings is rotated clockwise. Then the deflection of the galvanometer will be ___
Answer» The arm of an electric generator with split rings is rotated clockwise. Then the deflection of the galvanometer will be ___

Discussion

21.	How is charcoal prepared?
Answer» How is charcoal prepared?

Discussion

22.	How does the presence of impurities in a metal affect it's resistance?
Answer» How does the presence of impurities in a metal affect it's resistance?

Discussion

23.	Identify the words which can be used to replace the underlined part of the sentence. The yellow-coloured umbrella is in the backyard. I have kept the black umbrellas in the cupboard.
Answer» Identify the words which can be used to replace the underlined part of the sentence. The yellow-coloured umbrella is in the backyard. I have kept the black umbrellas in the cupboard.

23.

Identify the words which can be used to replace the underlined part of the sentence. The yellow-coloured umbrella is in the backyard. I have kept the black umbrellas in the cupboard.

Answer»

Identify the words which can be used to replace the underlined part of the sentence.
The yellow-coloured umbrella is in the backyard. I have kept the black umbrellas in the cupboard.

Discussion

24.	A circular object when kept between a small source of light and a screen, casts a sharp shadow on the screen. What could be the phenomenon responsible?
Answer» A circular object when kept between a small source of light and a screen, casts a sharp shadow on the screen. What could be the phenomenon responsible?

24.

A circular object when kept between a small source of light and a screen, casts a sharp shadow on the screen. What could be the phenomenon responsible?

Answer»

A circular object when kept between a small source of light and a screen, casts a sharp shadow on the screen. What could be the phenomenon responsible?

Discussion

25.	The moment of force is assigned a negative sign. The turning tendency of the force will be
Answer» The moment of force is assigned a negative sign. The turning tendency of the force will be

Discussion

26.	Five resistors of different resistances are connected together as shown in the figure. A 12 V battery is connected to the arrangement. The total current flowing in the circuit is :
Answer» Five resistors of different resistances are connected together as shown in the figure. A 12 V battery is connected to the arrangement. The total current flowing in the circuit is :

26.

Five resistors of different resistances are connected together as shown in the figure. A 12 V battery is connected to the arrangement. The total current flowing in the circuit is :

Answer»

Five resistors of different resistances are connected together as shown in the figure. A 12 V battery is connected to the arrangement. The total current flowing in the circuit is :

Discussion

27.	A current of 5 A exists in a 10 Ω resistance for 4 minutes. The charges that pass through any cross-section of the resistor in this time equals __ C.
Answer» A current of 5 A exists in a 10 $Ω$ resistance for 4 minutes. The charges that pass through any cross-section of the resistor in this time equals __ C.

Discussion

28.	How much energy (in kJ) is produced when 2 kg of substance is fully converted into energy?
Answer» How much energy (in kJ) is produced when 2 kg of substance is fully converted into energy?

Discussion

29.	If a ray of light goes from a rarer medium to a denser medium, will it bend towards the normal or away from it?
Answer» If a ray of light goes from a rarer medium to a denser medium, will it bend towards the normal or away from it?

Discussion

30.	What is the nature of a mirror having a focal length of, +10 cm ?
Answer» What is the nature of a mirror having a focal length of, +10 cm ?

Discussion

31.	A ring of radius 30 m and mass 10 kg is pivoted at point 'A' to a perpendicular wall. Find the magnitude of force so that ring will be in equillibrium? (Take acceleration due to gravity g = 10ms−2)
Answer» A ring of radius $30 m$ and mass $10 k g$ is pivoted at point 'A' to a perpendicular wall. Find the magnitude of force so that ring will be in equillibrium? (Take acceleration due to gravity $g$ = $10 m s^{-} 2$ )

Discussion

32.	A TV set shoots out a beam of electrons. The beam current is 10 μA. How many electrons strike the TV screen in each second? How much charge strikes the screen in a minute? [3 MARKS]
Answer» A TV set shoots out a beam of electrons. The beam current is 10 $μ$ A. How many electrons strike the TV screen in each second? How much charge strikes the screen in a minute? [3 MARKS]

Discussion

33.	A wave has wavelength 50 ∘A (a) Name the wave. (b) State its speed in vacuum. (c) State its one use.
Answer» A wave has wavelength 50 $\circ A$ (a) Name the wave. (b) State its speed in vacuum. (c) State its one use.

Discussion

34.	What would be the relation between the velocity of gun and bullet, iIf the mass of gun is less than the mass of bullet?
Answer» What would be the relation between the velocity of gun and bullet, iIf the mass of gun is less than the mass of bullet?

Discussion

35.	Write the uses of aluminium, copper and steel. [3 MARKS]
Answer» Write the uses of aluminium, copper and steel. [3 MARKS]

Discussion

36.	For which of the following colour, the magnifying power of a microscope will be maximum
Answer» For which of the following colour, the magnifying power of a microscope will be maximum

Discussion

37.	The power generated in a windmill depends on the ___ of wind
Answer» The power generated in a windmill depends on the ___ of wind

Discussion

38.	When glass prism of refracting angle 60∘ is immersed in a liquid, its angle of minimum deviation is 30∘.The critical angle of glass with respect to the liquid medium is
Answer» When glass prism of refracting angle $60^{\circ}$ is immersed in a liquid, its angle of minimum deviation is $30^{\circ}$ .The critical angle of glass with respect to the liquid medium is

Discussion

39.	V=IR So, V is directly proportional to I I=Q/t So, I is directly proportional to Q So, V must be directly proportional to Q But, V=W/Q That means V is inversely proportional to Q........ How can this be possible?????
Answer» V=IR So, V is directly proportional to I I=Q/t So, I is directly proportional to Q So, V must be directly proportional to Q But, V=W/Q That means V is inversely proportional to Q........ How can this be possible?????

Discussion

40.	What is the value of acceleration due to gravity in CGS unit?
Answer» What is the value of acceleration due to gravity in CGS unit?

Discussion

41.	If a pulse produced in a slinky takes 24 s to complete 6 journeys from end A to the other end B and then back to A, find the speed of the pulse along the slinky. Given the distance between the two ends, A and B is 4 m.
Answer» If a pulse produced in a slinky takes 24 s to complete 6 journeys from end A to the other end B and then back to A, find the speed of the pulse along the slinky. Given the distance between the two ends, A and B is 4 m.

Discussion

42.	If a glass of juice and a glass of water is heated to 100°C and then allowed to cool down to 35 °C, the amount of heat released by both of them will be?
Answer» If a glass of juice and a glass of water is heated to 100°C and then allowed to cool down to 35 °C, the amount of heat released by both of them will be?

Discussion

43.	The given figure shows two V-I graphs. Which of these represents ohmic conductor and which one represents non-ohmic conductor. Give the reason for your answer. [2 MARKS]
Answer» The given figure shows two V-I graphs. Which of these represents ohmic conductor and which one represents non-ohmic conductor. Give the reason for your answer. [2 MARKS]

Discussion

44.	If the radius of curvature of a concave mirror is 20 cm, then its focal length is:10
Answer» If the radius of curvature of a concave mirror is 20 cm, then its focal length is: 10

Discussion

45.	Why do we conserve energy if it can't be created nor destroyed?
Answer» Why do we conserve energy if it can't be created nor destroyed?

Discussion

46.	A pump can rise 600 kg of water from well to an average of 20 m/s. If efficiency of the pump is 70 %. Find its power in HP. Please show the full working.
Answer» A pump can rise 600 kg of water from well to an average of 20 m/s. If efficiency of the pump is 70 %. Find its power in HP. Please show the full working.

Discussion

47.	Question-based on practicals: While experimentally verifying Ohm's Law, a student observed that the pointer of the voltmeter coincide with the 15th division when the voltmeter has a least count of 0.05V. Find the observed reading of the voltmeter. Answer with full explanations. (2 marks) I am not able to solve this!!
Answer» Question-based on practicals: While experimentally verifying Ohm's Law, a student observed that the pointer of the voltmeter coincide with the 15th division when the voltmeter has a least count of 0.05V. Find the observed reading of the voltmeter. Answer with full explanations. (2 marks) I am not able to solve this!!

Discussion

48.	A flat coil ABCD is freely suspended between the poles of a U-shaped permanent magnet with the plane of coil parallel to the magnetic field as shown in the diagram. Now the AB part of the coil will ______.
Answer» A flat coil ABCD is freely suspended between the poles of a U-shaped permanent magnet with the plane of coil parallel to the magnetic field as shown in the diagram. Now the AB part of the coil will ______.

48.

A flat coil ABCD is freely suspended between the poles of a U-shaped permanent magnet with the plane of coil parallel to the magnetic field as shown in the diagram. Now the AB part of the coil will ______.

Answer»

A flat coil ABCD is freely suspended between the poles of a U-shaped permanent magnet with the plane of coil parallel to the magnetic field as shown in the diagram. Now the AB part of the coil will ______.

Discussion

49.	Cryogenics deals with the
Answer» Cryogenics deals with the

Discussion

50.	A dipole is said to be in stable equilibrium when angle between electric field and dipole moment is:
Answer» A dipole is said to be in stable equilibrium when angle between electric field and dipole moment is:

50.

A dipole is said to be in stable equilibrium when angle between electric field and dipole moment is:

Answer»

A dipole is said to be in stable equilibrium when angle between electric field and dipole moment is:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The substances whose resistivity lies between those of conductors and insulators are called ................ . __

Question 11 Explain why the planets do not twinkle?

Which among the following equations give the correct relation between resistance(R), length of the conductor(L) and area of cross-section of the conductor(A)?

The refractive index of diamond is much greater than that of ordinary glass. Is this fact of some use to a diamond-cutter? [3 MARKS]

A physical balance has its arms of length 60 cm and 40 cm. What weight kept on pan of longer arm will balance an object of weight 100 gf kept on other pan ?

A nut is opened by a wrench of length 10 cm. If the least force required is 5.0 N, find the moment of force needed to turn the nut.

If a person can see distant objects clearly, but cannot see nearby objects clearly, then the person is said to be affected from which of the following defects.

If the radius of curvature of a spherical mirror is 34.52 cm, then the focal length of that spherical mirror is

Drop of water behaves likes a

Select the statements that are true.

Think about a moving coil microphone. Then, with reference to it, pick out the odd one from the following given options.

In the given electric circuit if the current flowing through 3 Ω resistor is 1 A, find the voltage of the battery and the current I drawn from it.

On the Celsius scale the absolute zero of temperature is at___ Degree Celsius.

Name and state the principle of a simple a.c.generator. What is its use?

A tank of water is viewed normally from above. (a) State how does the depth of tank appear to change. (b) Draw a labeled ray diagram to explain your answer.

Choose the statements which are true among the following.

How is the boiling point of water affected when some salt is added to it?

Insulator have ............... free electrons. __

Question 1 A cell, a resistor, a key and an ammeter are arranged as shown in the circuit diagrams given below. The current recorded in the ammeter will be (a) maximum in (i) (b) maximum in (ii) (c) maximum in (iii) (d) same in all the cases

The arm of an electric generator with split rings is rotated clockwise. Then the deflection of the galvanometer will be ___

How is charcoal prepared?

How does the presence of impurities in a metal affect it's resistance?

Identify the words which can be used to replace the underlined part of the sentence. The yellow-coloured umbrella is in the backyard. I have kept the black umbrellas in the cupboard.

A circular object when kept between a small source of light and a screen, casts a sharp shadow on the screen. What could be the phenomenon responsible?

The moment of force is assigned a negative sign. The turning tendency of the force will be

Five resistors of different resistances are connected together as shown in the figure. A 12 V battery is connected to the arrangement. The total current flowing in the circuit is :

A current of 5 A exists in a 10 Ω resistance for 4 minutes. The charges that pass through any cross-section of the resistor in this time equals __ C.

How much energy (in kJ) is produced when 2 kg of substance is fully converted into energy?

If a ray of light goes from a rarer medium to a denser medium, will it bend towards the normal or away from it?

What is the nature of a mirror having a focal length of, +10 cm ?

A ring of radius 30 m and mass 10 kg is pivoted at point 'A' to a perpendicular wall. Find the magnitude of force so that ring will be in equillibrium? (Take acceleration due to gravity g = 10ms−2)

A TV set shoots out a beam of electrons. The beam current is 10 μA. How many electrons strike the TV screen in each second? How much charge strikes the screen in a minute? [3 MARKS]

A wave has wavelength 50 ∘A (a) Name the wave. (b) State its speed in vacuum. (c) State its one use.

What would be the relation between the velocity of gun and bullet, iIf the mass of gun is less than the mass of bullet?

Write the uses of aluminium, copper and steel. [3 MARKS]

For which of the following colour, the magnifying power of a microscope will be maximum

The power generated in a windmill depends on the ___ of wind

When glass prism of refracting angle 60∘ is immersed in a liquid, its angle of minimum deviation is 30∘.The critical angle of glass with respect to the liquid medium is

V=IR So, V is directly proportional to I I=Q/t So, I is directly proportional to Q So, V must be directly proportional to Q But, V=W/Q That means V is inversely proportional to Q........ How can this be possible?????

What is the value of acceleration due to gravity in CGS unit?

If a pulse produced in a slinky takes 24 s to complete 6 journeys from end A to the other end B and then back to A, find the speed of the pulse along the slinky. Given the distance between the two ends, A and B is 4 m.

If a glass of juice and a glass of water is heated to 100°C and then allowed to cool down to 35 °C, the amount of heat released by both of them will be?

The given figure shows two V-I graphs. Which of these represents ohmic conductor and which one represents non-ohmic conductor. Give the reason for your answer. [2 MARKS]

If the radius of curvature of a concave mirror is 20 cm, then its focal length is:10

Why do we conserve energy if it can't be created nor destroyed?

A pump can rise 600 kg of water from well to an average of 20 m/s. If efficiency of the pump is 70 %. Find its power in HP. Please show the full working.

A flat coil ABCD is freely suspended between the poles of a U-shaped permanent magnet with the plane of coil parallel to the magnetic field as shown in the diagram. Now the AB part of the coil will ______.

Cryogenics deals with the

A dipole is said to be in stable equilibrium when angle between electric field and dipole moment is: