16569 + Interview Questions in Physics

1.	Question 14 The path of a ray of light coming from air passing through a rectangular glass slab traced by four students are shown as A, B, C and D in figure. Which one of them is correct? (a) A (b) B (c) C (d) D
Answer» Question 14 The path of a ray of light coming from air passing through a rectangular glass slab traced by four students are shown as A, B, C and D in figure. Which one of them is correct? (a) A (b) B (c) C (d) D

Discussion

2.	The reason why earth wire is used is:
Answer» The reason why earth wire is used is:

Discussion

3.	If diameter of a conductor is doubled , then drift velocity of electrons inside it will not change Although we have the relation I = neaVd
Answer» If diameter of a conductor is doubled , then drift velocity of electrons inside it will not change Although we have the relation I = neaVd

3.

If diameter of a conductor is doubled , then drift velocity of electrons inside it will not change Although we have the relation I = neaVd

Answer»

If diameter of a conductor is doubled , then drift velocity of electrons inside it will not change

Although we have the relation I = neaVd

Discussion

4.	A pencil partly immersed in a glass tumbler filled with water appears to be displaced at the interface of air and water because:
Answer» A pencil partly immersed in a glass tumbler filled with water appears to be displaced at the interface of air and water because:

Discussion

5.	A light ray is incident on an equilateral prism of refractive index 5/3. What should be the angle of incidence such that the ray gazes on the second surface ?
Answer» A light ray is incident on an equilateral prism of refractive index 5/3. What should be the angle of incidence such that the ray gazes on the second surface ?

Discussion

6.	A circular disc of mass M and radius R is at rest at the top of an incline of height H (Fig.). On releasing, the disc rolls down the incline without slipping. What is the angular momentum of the disc about its centre of mass when it reaches the bottom of the incline?
Answer» A circular disc of mass M and radius R is at rest at the top of an incline of height H (Fig.). On releasing, the disc rolls down the incline without slipping. What is the angular momentum of the disc about its centre of mass when it reaches the bottom of the incline?

Discussion

7.	What conclusion did the Chandrayaan derive from the Terrain Mapping Camera?
Answer» What conclusion did the Chandrayaan derive from the Terrain Mapping Camera?

Discussion

8.	A concave mirror produces a real image 1 cm tall of an object 2.5 mm tall placed 5 cm from the mirror. Find the position of the image and the focal length of the mirror.
Answer» A concave mirror produces a real image 1 cm tall of an object 2.5 mm tall placed 5 cm from the mirror. Find the position of the image and the focal length of the mirror.

Discussion

9.	The given diagram shows a ray of light incident on an equilateral glass prism placed in minimum deviation position. How are angle of incidence and angle of emergence related to each other in this position of the prism?
Answer» The given diagram shows a ray of light incident on an equilateral glass prism placed in minimum deviation position. How are angle of incidence and angle of emergence related to each other in this position of the prism?

9.

The given diagram shows a ray of light incident on an equilateral glass prism placed in minimum deviation position. How are angle of incidence and angle of emergence related to each other in this position of the prism?

Answer»

The given diagram shows a ray of light incident on an equilateral glass prism placed in minimum deviation position. How are angle of incidence and angle of emergence related to each other in this position of the prism?

Discussion

10.	The charge on an electron is :
Answer» The charge on an electron is :

Discussion

11.	What are ultraviolet radiations ? How are they detected ? State one use of these radiations.
Answer» What are ultraviolet radiations ? How are they detected ? State one use of these radiations.

Discussion

12.	A piece of iron of mass 2.0 kg has a heat capacity of 966 J K−1.Find:(i) heat energy needed to warm it by 15∘C,and (ii) its specific heat capacity in S.I. unit
Answer» A piece of iron of mass 2.0 kg has a heat capacity of 966 J $K^{- 1}$ .Find:(i) heat energy needed to warm it by $15^{\circ} C$ ,and (ii) its specific heat capacity in S.I. unit

Discussion

13.	A. In the hands of a lesser player, the HZ Jazz can sound rather flat and woody, but good players succeed in producing a vibrant, singing tone. B. Though the British system was once widely favored in England, Smorgasbord-system instruments are no longer made there, and the last prominent English player of the British system retired in the 1980s. C. Conversely, when poorly played, the Smorgasbord can sound buzzy and nasal, but good players succeed in producing a warm, expressive sound different from but in no way inferior to that of the HZ. D. As with all Jazzs, the tone varies considerably depending on the individual instrument and performer. E. However, with its continued use in some regions and its distinctive tone, the Smorgasbord continues to have a place in modern Jazz playing, particularly in Britain. ___
Answer» A. In the hands of a lesser player, the HZ Jazz can sound rather flat and woody, but good players succeed in producing a vibrant, singing tone. B. Though the British system was once widely favored in England, Smorgasbord-system instruments are no longer made there, and the last prominent English player of the British system retired in the 1980s. C. Conversely, when poorly played, the Smorgasbord can sound buzzy and nasal, but good players succeed in producing a warm, expressive sound different from but in no way inferior to that of the HZ. D. As with all Jazzs, the tone varies considerably depending on the individual instrument and performer. E. However, with its continued use in some regions and its distinctive tone, the Smorgasbord continues to have a place in modern Jazz playing, particularly in Britain. ___

13.

A. In the hands of a lesser player, the HZ Jazz can sound rather flat and woody, but good players succeed in producing a vibrant, singing tone. B. Though the British system was once widely favored in England, Smorgasbord-system instruments are no longer made there, and the last prominent English player of the British system retired in the 1980s. C. Conversely, when poorly played, the Smorgasbord can sound buzzy and nasal, but good players succeed in producing a warm, expressive sound different from but in no way inferior to that of the HZ. D. As with all Jazzs, the tone varies considerably depending on the individual instrument and performer. E. However, with its continued use in some regions and its distinctive tone, the Smorgasbord continues to have a place in modern Jazz playing, particularly in Britain. ___

Answer»

A. In the hands of a lesser player, the HZ Jazz can sound rather flat and woody, but good players succeed in producing a vibrant, singing tone.

B. Though the British system was once widely favored in England, Smorgasbord-system instruments are no longer made there, and the last prominent English player of the British system retired in the 1980s.

C. Conversely, when poorly played, the Smorgasbord can sound buzzy and nasal, but good players succeed in producing a warm, expressive sound different from but in no way inferior to that of the HZ.

D. As with all Jazzs, the tone varies considerably depending on the individual instrument and performer.

E. However, with its continued use in some regions and its distinctive tone, the Smorgasbord continues to have a place in modern Jazz playing, particularly in Britain.

___

Discussion

14.	please provide numerical problems from chapter electricity for practice.
Answer» please provide numerical problems from chapter electricity for practice.

Discussion

15.	A convex lens of focal length 25cm and a concave lens of focal length 10cm are placed in close contact with each other. Calculate the lens power of this combination
Answer» A convex lens of focal length 25cm and a concave lens of focal length 10cm are placed in close contact with each other. Calculate the lens power of this combination

Discussion

16.	The danger signals are red in colour because it is
Answer» The danger signals are red in colour because it is

Discussion

17.	The most suitable material for making the core of an electromagnet is : (a) soft iron (b) brass (c) aluminium (d) steel
Answer» The most suitable material for making the core of an electromagnet is : (a) soft iron (b) brass (c) aluminium (d) steel

17.

The most suitable material for making the core of an electromagnet is : (a) soft iron (b) brass (c) aluminium (d) steel

Answer»

The most suitable material for making the core of an electromagnet is :

(a) soft iron

(b) brass

(c) aluminium

(d) steel

Discussion

18.	Name the spherical mirror which has : (a) virtual principal focus. (b) real principal focus.
Answer» Name the spherical mirror which has : (a) virtual principal focus. (b) real principal focus.

Discussion

19.	(a) The earthing of an electric appliance is useful only if the fuse is in the live wire. Give the reason. (b) Name the part of the appliance which is earthed.
Answer» (a) The earthing of an electric appliance is useful only if the fuse is in the live wire. Give the reason. (b) Name the part of the appliance which is earthed.

19.

(a) The earthing of an electric appliance is useful only if the fuse is in the live wire. Give the reason. (b) Name the part of the appliance which is earthed.

Answer»

(a) The earthing of an electric appliance is useful only if the fuse is in the live wire. Give the reason.

(b) Name the part of the appliance which is earthed.

Discussion

20.	Choose the correct option.
Answer» Choose the correct option.

Discussion

21.	The order of temperature required for thermonuclear fusion to take place is:
Answer» The order of temperature required for thermonuclear fusion to take place is:

Discussion

22.	List four advantages of water stored in the ground.
Answer» List four advantages of water stored in the ground.

Discussion

23.	A force of 4 N is acting on a football of diameter 30 cm as shown. Calculate the moment of the force about the point shown.
Answer» A force of $4 N$ is acting on a football of diameter $30 c m$ as shown. Calculate the moment of the force about the point shown.

Discussion

24.	1) state two practical use of convex lens and concave lens?
Answer» 1) state two practical use of convex lens and concave lens?

Discussion

25.	When a mass rotates in a plane about a fixed point, the direction of angular momentum is along
Answer» When a mass rotates in a plane about a fixed point, the direction of angular momentum is along

Discussion

26.	How do you think the brightness of two lamps arranged in parallel compares with the brightness of two lamps arranged in series (Both arrangements having one cell)?
Answer» How do you think the brightness of two lamps arranged in parallel compares with the brightness of two lamps arranged in series (Both arrangements having one cell)?

Discussion

27.	If the potential difference between the ends of a fixed resistor is halved, the electric power will become : (a) Double (b) half (c) four times (d) one-fourth
Answer» If the potential difference between the ends of a fixed resistor is halved, the electric power will become : (a) Double (b) half (c) four times (d) one-fourth

27.

If the potential difference between the ends of a fixed resistor is halved, the electric power will become : (a) Double (b) half (c) four times (d) one-fourth

Answer»

If the potential difference between the ends of a fixed resistor is halved, the electric power will become :

(a) Double (b) half (c) four times (d) one-fourth

Discussion

28.	a. State how resistance of a conductor is affected when low current passes through it for short duration. b) a heavy current passes through it for 30 seconds
Answer» a. State how resistance of a conductor is affected when low current passes through it for short duration. b) a heavy current passes through it for 30 seconds

Discussion

29.	Name three primary colour?
Answer» Name three primary colour?

Discussion

30.	State Fleming’s Left Hand Rule.
Answer» State Fleming’s Left Hand Rule.

Discussion

31.	On what factors does the focal length of a lens depend? [2 MARKS]
Answer» On what factors does the focal length of a lens depend? [2 MARKS]

Discussion

32.	A non-conducting ring of radius R has charge Q distributed unevenly over it. If it rotates with an angular velocity ω, the equivalent resistance between parallel faces is
Answer» A non-conducting ring of radius R has charge Q distributed unevenly over it. If it rotates with an angular velocity ω, the equivalent resistance between parallel faces is

Discussion

33.	what is an real image
Answer» what is an real image

Discussion

34.	When nucleus of an electrically neutral atom undergoes a radioactive decay process, it will remain neutral after the decay, if the process is
Answer» When nucleus of an electrically neutral atom undergoes a radioactive decay process, it will remain neutral after the decay, if the process is

Discussion

35.	The diagram represents a Lever. Calculate the ratio ‘Force A’ to ‘Force B’. What is this ratio called?
Answer» The diagram represents a Lever. Calculate the ratio ‘Force A’ to ‘Force B’. What is this ratio called?

35.

The diagram represents a Lever. Calculate the ratio ‘Force A’ to ‘Force B’. What is this ratio called?

Answer»

The diagram represents a Lever.

Calculate the ratio ‘Force A’ to ‘Force B’.

What is this ratio called?

Discussion

36.	We say energy can neither be created nor destroyed but it is interchangeable. And we know electricity is also a type of energy, so why do we say save electricity for future ?
Answer» We say energy can neither be created nor destroyed but it is interchangeable. And we know electricity is also a type of energy, so why do we say save electricity for future ?

Discussion

37.	Why aurora forms near North pole and South pole only?
Answer» Why aurora forms near North pole and South pole only?

Discussion

38.	Tyndall effect is the scattering of light by
Answer» Tyndall effect is the scattering of light by

Discussion

39.	If an object is placed at the focus of a concave mirror, where is the image formed ?
Answer» If an object is placed at the focus of a concave mirror, where is the image formed ?

Discussion

40.	A prism with an angle A=60° produces an angle of minimum deviation 30°.Then the refractive index of the material of prism
Answer» A prism with an angle A=60° produces an angle of minimum deviation 30°.Then the refractive index of the material of prism

Discussion

41.	Potential difference between two points of a wire carrying 5 ampere current is 0.5 volt. What is the resistance between these two points?
Answer» Potential difference between two points of a wire carrying 5 ampere current is 0.5 volt. What is the resistance between these two points?

Discussion

42.	Stems of 2 vibrating tuning forks A and B are touched to the wooden box of a sinister.It is observed that the paper rider (a small piece of paper folded at the centre.)present on the wire flies off when the stem of vibrating tuning fork B is touched to the wooden box but the paper just vibrates when the stem of vibrating tuning fork A is touched to the wooden box. I) Name the phenomenon when the paper rider just vibrates. 2)Name the phenomenon when the paper rider flies off. 3)Why the paper rider fly off when the stem of tuning fork B is touched to the box?
Answer» Stems of 2 vibrating tuning forks A and B are touched to the wooden box of a sinister.It is observed that the paper rider (a small piece of paper folded at the centre.)present on the wire flies off when the stem of vibrating tuning fork B is touched to the wooden box but the paper just vibrates when the stem of vibrating tuning fork A is touched to the wooden box. I) Name the phenomenon when the paper rider just vibrates. 2)Name the phenomenon when the paper rider flies off. 3)Why the paper rider fly off when the stem of tuning fork B is touched to the box?

42.

Stems of 2 vibrating tuning forks A and B are touched to the wooden box of a sinister.It is observed that the paper rider (a small piece of paper folded at the centre.)present on the wire flies off when the stem of vibrating tuning fork B is touched to the wooden box but the paper just vibrates when the stem of vibrating tuning fork A is touched to the wooden box. I) Name the phenomenon when the paper rider just vibrates. 2)Name the phenomenon when the paper rider flies off. 3)Why the paper rider fly off when the stem of tuning fork B is touched to the box?

Answer»

Stems of 2 vibrating tuning forks A and B are touched to the wooden box of a sinister.It is observed that the paper rider (a small piece of paper folded at the centre.)present on the wire flies off when the stem of vibrating tuning fork B is touched to the wooden box but the paper just vibrates when the stem of vibrating tuning fork A is touched to the wooden box.

I) Name the phenomenon when the paper rider just vibrates.

2)Name the phenomenon when the paper rider flies off.

3)Why the paper rider fly off when the stem of tuning fork B is touched to the box?

Discussion

43.	Give two uses of electromagnets. [2 MARKS]
Answer» Give two uses of electromagnets. [2 MARKS]

Discussion

44.	Angle of minimum deviation is equal to the angle of prism A of an equilateral glass prism. The angle of incidence at which minimum deviation will be obtained is
Answer» Angle of minimum deviation is equal to the angle of prism A of an equilateral glass prism. The angle of incidence at which minimum deviation will be obtained is

Discussion

45.	Give two characteristics of a high tension wire.
Answer» Give two characteristics of a high tension wire.

45.

Give two characteristics of a high tension wire.

Answer»

Give two characteristics of a high tension wire.

Discussion

46.	Question 16 An electric kettle consumes 1 KW of electric power when operated at 220 V. A fuse wire of what rating must be used for it? (a) 1 A (b) 2 A (c) 4 A (d) 5 A
Answer» Question 16 An electric kettle consumes 1 KW of electric power when operated at 220 V. A fuse wire of what rating must be used for it? (a) 1 A (b) 2 A (c) 4 A (d) 5 A

Discussion

47.	A cylindrical bar magnet is placed at a fixed point along the axis of a circular coil as shown in the figure below. If the magnet is rotated about the axis of the coil, then:
Answer» A cylindrical bar magnet is placed at a fixed point along the axis of a circular coil as shown in the figure below. If the magnet is rotated about the axis of the coil, then:

47.

A cylindrical bar magnet is placed at a fixed point along the axis of a circular coil as shown in the figure below. If the magnet is rotated about the axis of the coil, then:

Answer»

A cylindrical bar magnet is placed at a fixed point along the axis of a circular coil as shown in the figure below. If the magnet is rotated about the axis of the coil, then:

Discussion

48.	Gold number of haemoglobin is 0.03. Hence 100 ml of gold sol will require haemoglobin in what quantity so that gold is not coagulated by 10ml 10% NaCl solution.
Answer» Gold number of haemoglobin is 0.03. Hence 100 ml of gold sol will require haemoglobin in what quantity so that gold is not coagulated by 10ml 10% NaCl solution.

Discussion

49.	What happens to the resistance of a circuit if the current through it is doubled
Answer» What happens to the resistance of a circuit if the current through it is doubled

Discussion

50.	When a soft iron core is inserted in a coil, the strength of the magnetic field:
Answer» When a soft iron core is inserted in a coil, the strength of the magnetic field:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Question 14 The path of a ray of light coming from air passing through a rectangular glass slab traced by four students are shown as A, B, C and D in figure. Which one of them is correct? (a) A (b) B (c) C (d) D

The reason why earth wire is used is:

If diameter of a conductor is doubled , then drift velocity of electrons inside it will not change Although we have the relation I = neaVd

A pencil partly immersed in a glass tumbler filled with water appears to be displaced at the interface of air and water because:

A light ray is incident on an equilateral prism of refractive index 5/3. What should be the angle of incidence such that the ray gazes on the second surface ?

A circular disc of mass M and radius R is at rest at the top of an incline of height H (Fig.). On releasing, the disc rolls down the incline without slipping. What is the angular momentum of the disc about its centre of mass when it reaches the bottom of the incline?

What conclusion did the Chandrayaan derive from the Terrain Mapping Camera?

A concave mirror produces a real image 1 cm tall of an object 2.5 mm tall placed 5 cm from the mirror. Find the position of the image and the focal length of the mirror.

The given diagram shows a ray of light incident on an equilateral glass prism placed in minimum deviation position. How are angle of incidence and angle of emergence related to each other in this position of the prism?

The charge on an electron is :

What are ultraviolet radiations ? How are they detected ? State one use of these radiations.

A piece of iron of mass 2.0 kg has a heat capacity of 966 J K−1.Find:(i) heat energy needed to warm it by 15∘C,and (ii) its specific heat capacity in S.I. unit

please provide numerical problems from chapter electricity for practice.

A convex lens of focal length 25cm and a concave lens of focal length 10cm are placed in close contact with each other. Calculate the lens power of this combination

The danger signals are red in colour because it is

The most suitable material for making the core of an electromagnet is : (a) soft iron (b) brass (c) aluminium (d) steel

Name the spherical mirror which has : (a) virtual principal focus. (b) real principal focus.

(a) The earthing of an electric appliance is useful only if the fuse is in the live wire. Give the reason. (b) Name the part of the appliance which is earthed.

Choose the correct option.

The order of temperature required for thermonuclear fusion to take place is:

List four advantages of water stored in the ground.

A force of 4 N is acting on a football of diameter 30 cm as shown. Calculate the moment of the force about the point shown.

1) state two practical use of convex lens and concave lens?

When a mass rotates in a plane about a fixed point, the direction of angular momentum is along

How do you think the brightness of two lamps arranged in parallel compares with the brightness of two lamps arranged in series (Both arrangements having one cell)?

If the potential difference between the ends of a fixed resistor is halved, the electric power will become : (a) Double (b) half (c) four times (d) one-fourth

a. State how resistance of a conductor is affected when low current passes through it for short duration. b) a heavy current passes through it for 30 seconds

Name three primary colour?

State Fleming’s Left Hand Rule.

On what factors does the focal length of a lens depend? [2 MARKS]

A non-conducting ring of radius R has charge Q distributed unevenly over it. If it rotates with an angular velocity ω, the equivalent resistance between parallel faces is

what is an real image

When nucleus of an electrically neutral atom undergoes a radioactive decay process, it will remain neutral after the decay, if the process is

The diagram represents a Lever. Calculate the ratio ‘Force A’ to ‘Force B’. What is this ratio called?

We say energy can neither be created nor destroyed but it is interchangeable. And we know electricity is also a type of energy, so why do we say save electricity for future ?

Why aurora forms near North pole and South pole only?

Tyndall effect is the scattering of light by

If an object is placed at the focus of a concave mirror, where is the image formed ?

A prism with an angle A=60° produces an angle of minimum deviation 30°.Then the refractive index of the material of prism

Potential difference between two points of a wire carrying 5 ampere current is 0.5 volt. What is the resistance between these two points?

Give two uses of electromagnets. [2 MARKS]

Angle of minimum deviation is equal to the angle of prism A of an equilateral glass prism. The angle of incidence at which minimum deviation will be obtained is

Give two characteristics of a high tension wire.

Question 16 An electric kettle consumes 1 KW of electric power when operated at 220 V. A fuse wire of what rating must be used for it? (a) 1 A (b) 2 A (c) 4 A (d) 5 A

A cylindrical bar magnet is placed at a fixed point along the axis of a circular coil as shown in the figure below. If the magnet is rotated about the axis of the coil, then:

Gold number of haemoglobin is 0.03. Hence 100 ml of gold sol will require haemoglobin in what quantity so that gold is not coagulated by 10ml 10% NaCl solution.

What happens to the resistance of a circuit if the current through it is doubled

When a soft iron core is inserted in a coil, the strength of the magnetic field: