16569 + Interview Questions in Physics

1.	What is the definition of light . Is light a ray or wave or particles(photons).
Answer» What is the definition of light . Is light a ray or wave or particles(photons).

1.

What is the definition of light . Is light a ray or wave or particles(photons).

Answer»

What is the definition of light .

Is light a ray or wave or particles(photons).

2.	Which is eco friendly? Wearing an extra sweater or using a heating device on cold days?
Answer» Which is eco friendly? Wearing an extra sweater or using a heating device on cold days?

Discussion

3.	A current of 0.1A was passed for 2hr through a solution of cuprocyanide and 0.3745g of copper was deposited on the cathode. Calculate the current efficiency for the copper deposition ( Cu = 63.5) Ans : 79% Please give detailed explanation as I won't be able to understand concise answers.
Answer» A current of 0.1A was passed for 2hr through a solution of cuprocyanide and 0.3745g of copper was deposited on the cathode. Calculate the current efficiency for the copper deposition ( Cu = 63.5) Ans : 79% Please give detailed explanation as I won't be able to understand concise answers.

3.

A current of 0.1A was passed for 2hr through a solution of cuprocyanide and 0.3745g of copper was deposited on the cathode. Calculate the current efficiency for the copper deposition ( Cu = 63.5) Ans : 79% Please give detailed explanation as I won't be able to understand concise answers.

Answer»

A current of 0.1A was passed for 2hr through a solution of cuprocyanide and 0.3745g of copper was deposited on the cathode. Calculate the current efficiency for the copper deposition ( Cu = 63.5)

Ans : 79%

Please give detailed explanation as I won't be able to understand concise answers.

Discussion

4.	Differentiate between Geothermal energy and Tidal energy?
Answer» Differentiate between Geothermal energy and Tidal energy?

Discussion

5.	Choose the correct option according to the angle between force and direction of displacement. Coloumn1Coloumn21. θ is zeroi) Work done is always zero2. θ is less than 900 ii) Work done is non-negative 3.θ is greater than 900iii) Work done is always positive4. θ is 900 iv) Work done is never positive
Answer» Choose the correct option according to the angle between force and direction of displacement. $\begin{matrix} Coloumn1 & Coloumn2 1. θ is zero & i) Work done is always zero 2. θ is less than 90^{0} & ii) Work done is non-negative 3. θ is greater than 90^{0} & iii) Work done is always positive 4. θ is 90^{0} & iv) Work done is never positive \end{matrix}$

5.

Choose the correct option according to the angle between force and direction of displacement. Coloumn1Coloumn21. θ is zeroi) Work done is always zero2. θ is less than 900 ii) Work done is non-negative 3.θ is greater than 900iii) Work done is always positive4. θ is 900 iv) Work done is never positive

Answer»

Choose the correct option according to the angle between force and direction of displacement.

$\begin{matrix} Coloumn1 & Coloumn2 1. θ is zero & i) Work done is always zero 2. θ is less than 90^{0} & ii) Work done is non-negative 3. θ is greater than 90^{0} & iii) Work done is always positive 4. θ is 90^{0} & iv) Work done is never positive \end{matrix}$

Discussion

6.	The radius of the driving wheel of a set of gears is 18 cm. It has 100 teeth and rotates at a speed of 30 rpm. If the driven wheel rotates at a speed of 150 rpm, what is the radius of the driven wheel.
Answer» The radius of the driving wheel of a set of gears is 18 cm. It has 100 teeth and rotates at a speed of 30 rpm. If the driven wheel rotates at a speed of 150 rpm, what is the radius of the driven wheel.

Discussion

7.	The wattage of a bulb is 24W when it is connected to a 12 v battery. Calculate the effective wattage if it operates on 6v battery. Calculate the wattage if it operates on a 6 v battery. Which of the following solution is correct for the above question and why and how to know which way to do? Solution 1:- P=VI I=P/V I=24/12 I=2 A Now V = 6v New P = VI = 6*2 = 12W Solution 2:- P = V2/R R = V2/P R = 122/24 R = 6 Ohm Now V = 6v New P = V2/R = 62/6 = 6W
Answer» The wattage of a bulb is 24W when it is connected to a 12 v battery. Calculate the effective wattage if it operates on 6v battery. Calculate the wattage if it operates on a 6 v battery. Which of the following solution is correct for the above question and why and how to know which way to do? Solution 1:- P=VI I=P/V I=24/12 I=2 A Now V = 6v New P = VI = 6*2 = 12W Solution 2:- P = V²/R R = V²/P R = 12²/24 R = 6 Ohm Now V = 6v New P = V²/R = 6²/6 = 6W

Discussion

8.	A mono atomic gas is supplied the heat Q very slowly keeping the pressure constant. The work done by the gas will be
Answer» A mono atomic gas is supplied the heat Q very slowly keeping the pressure constant. The work done by the gas will be

Discussion

9.	Give three advantages of DC over AC..
Answer» Give three advantages of DC over AC..

Discussion

10.	In these diagrams, the angle of refraction r has been correctly marked in which diagram?
Answer» In these diagrams, the angle of refraction r has been correctly marked in which diagram?

10.

In these diagrams, the angle of refraction r has been correctly marked in which diagram?

Answer»

In these diagrams, the angle of refraction r has been correctly marked in which diagram?

Discussion

11.	A convex lens forms an image of the same size as the object at a distance of 30 cm from the lens. Find the total length of the lens. Also find power of the lens. What is the distance of the object from the lens?
Answer» A convex lens forms an image of the same size as the object at a distance of 30 cm from the lens. Find the total length of the lens. Also find power of the lens. What is the distance of the object from the lens?

Discussion

12.	Three 2 V cells are connected in series and used as a battery in a circuit. (a) What is the p.d. at the terminals of the battery? (b) How many joules of electrical energy does 1 C gain on passing through (i) one cell (ii) all three cells?
Answer» Three 2 V cells are connected in series and used as a battery in a circuit. (a) What is the p.d. at the terminals of the battery? (b) How many joules of electrical energy does 1 C gain on passing through (i) one cell (ii) all three cells?

Discussion

13.	The lens of power + 1.0 D is : (a) convex of focal length 1.0 cm (b) convex of focal length 1.0 m (c) concave of focal length 1.0 cm (d) concave of focal length 1.0 m
Answer» The lens of power + 1.0 D is : (a) convex of focal length 1.0 cm (b) convex of focal length 1.0 m (c) concave of focal length 1.0 cm (d) concave of focal length 1.0 m

13.

The lens of power + 1.0 D is : (a) convex of focal length 1.0 cm (b) convex of focal length 1.0 m (c) concave of focal length 1.0 cm (d) concave of focal length 1.0 m

Answer»

The lens of power + 1.0 D is :

(a) convex of focal length 1.0 cm

(b) convex of focal length 1.0 m

(c) concave of focal length 1.0 cm

(d) concave of focal length 1.0 m

Discussion

14.	The substance having infinitely high electrical resistance is called: (a) conductor (b) resistor (c) superconductor (d) insulator
Answer» The substance having infinitely high electrical resistance is called: (a) conductor (b) resistor (c) superconductor (d) insulator

Discussion

15.	An electrical appliance has a resistance of 25Ω when this electrical appliance is connected to a 230 V supply line, the current passing through it will be:
Answer» An electrical appliance has a resistance of $25 Ω$ when this electrical appliance is connected to a 230 V supply line, the current passing through it will be:

Discussion

16.	___ has high calorific value, burns readily and can be used as fuel in homes and automobiles.
Answer» ___ has high calorific value, burns readily and can be used as fuel in homes and automobiles.

Discussion

17.	Consider a two-particle system with the particles having masses m1 and m2. If the first particle is pushed towards the centre of mass through a distance d, by what distance should the second particle be moved so as to keep the centre of mass at the same position?
Answer» Consider a two-particle system with the particles having masses $m_{1}$ and $m_{2}$ . If the first particle is pushed towards the centre of mass through a distance d, by what distance should the second particle be moved so as to keep the centre of mass at the same position?

Discussion

18.	When the current in a conductor is doubled, keeping other parameters constant, the heating effect of the current will become:
Answer» When the current in a conductor is doubled, keeping other parameters constant, the heating effect of the current will become:

Discussion

19.	Choose the correct statement/statements from the following options regarding the magnetic field lines of an electromagnet.
Answer» Choose the correct statement/statements from the following options regarding the magnetic field lines of an electromagnet.

Discussion

20.	Which of the following is/are correct pair/s?
Answer» Which of the following is/are correct pair/s?

Discussion

21.	One of the following don't represent electrical power a . I²R b. IR² c . VI d. V² by R
Answer» One of the following don't represent electrical power a . I²R b. IR² c . VI d. V² by R

21.

One of the following don't represent electrical power a . I²R b. IR² c . VI d. V² by R

Answer»

One of the following don't represent electrical power

a . I²R

b. IR²

c . VI

d. V² by R

Discussion

22.	What is the difference between the AC and DC motor. And which one is motor or generator??
Answer» What is the difference between the AC and DC motor. And which one is motor or generator??

Discussion

23.	Luke Skywalker has a mass of 13kg and weight of 127.4N on Earth. Find his weight on the Endor moon. Acceleration on Endor due to gravity is 2ms−2.
Answer» Luke Skywalker has a mass of $13 k g$ and weight of $127.4 N$ on Earth. Find his weight on the Endor moon. Acceleration on Endor due to gravity is $2 m s^{- 2}$ .

Discussion

24.	How is it so that a bulb glows as soon as it's switch on; though the electron drift Wat the speed of 1 or 2 cm/ s
Answer» How is it so that a bulb glows as soon as it's switch on; though the electron drift Wat the speed of 1 or 2 cm/ s

Discussion

25.	An object is placed at a long distance in front of a convex mirror of radius of curvature 30 cm. State the position of its image.
Answer» An object is placed at a long distance in front of a convex mirror of radius of curvature 30 cm. State the position of its image.

Discussion

26.	A virtual image of an object is formed by a concave lens. The lens is then coupled (placed in contact) with a convex lens. A virtual image is again formed. The image, now
Answer» A virtual image of an object is formed by a concave lens. The lens is then coupled (placed in contact) with a convex lens. A virtual image is again formed. The image, now

Discussion

27.	Which one of the following statements is not true ? (a) In a house circuit, lamps are used in parallel. (b) Switches, fuses adn circuit breakes should be placed in the neutral wire (c) An electric iron has its earth wire connected to the metal case to prevent the user receiving a shock (d) When connecting a three-core cable to a 13 A three-pin plug, the red wire goes to the live pin.
Answer» Which one of the following statements is not true ? (a) In a house circuit, lamps are used in parallel. (b) Switches, fuses adn circuit breakes should be placed in the neutral wire (c) An electric iron has its earth wire connected to the metal case to prevent the user receiving a shock (d) When connecting a three-core cable to a 13 A three-pin plug, the red wire goes to the live pin.

27.

Which one of the following statements is not true ? (a) In a house circuit, lamps are used in parallel. (b) Switches, fuses adn circuit breakes should be placed in the neutral wire (c) An electric iron has its earth wire connected to the metal case to prevent the user receiving a shock (d) When connecting a three-core cable to a 13 A three-pin plug, the red wire goes to the live pin.

Answer»

Which one of the following statements is not true ?

(a) In a house circuit, lamps are used in parallel.

(b) Switches, fuses adn circuit breakes should be placed in the neutral wire

(c) An electric iron has its earth wire connected to the metal case to prevent the user receiving a shock

(d) When connecting a three-core cable to a 13 A three-pin plug, the red wire goes to the live pin.

Discussion

28.	Which effect fo current is utilised in the working of an elelctric fuse?
Answer» Which effect fo current is utilised in the working of an elelctric fuse?

Discussion

29.	Two identical immersion heaters are to be used to heat water, in a large container. Which connection will produce more heat in series or in parallel?
Answer» Two identical immersion heaters are to be used to heat water, in a large container. Which connection will produce more heat in series or in parallel?

Discussion

30.	Is the magnetic field produced by a straight current carrying wire uniform?
Answer» Is the magnetic field produced by a straight current carrying wire uniform?

Discussion

31.	The refractive index of water is : (a) 1.33 (b) 1.50 (c) 2.42 (d) 1.36
Answer» The refractive index of water is : (a) 1.33 (b) 1.50 (c) 2.42 (d) 1.36

Discussion

32.	Why do the tendrils of the climbers grow around the hard support?
Answer» Why do the tendrils of the climbers grow around the hard support?

Discussion

33.	Two fuse wires are rated 5 A and 20 A. Which of the two is thicker?
Answer» Two fuse wires are rated 5 A and 20 A. Which of the two is thicker?

33.

Two fuse wires are rated 5 A and 20 A. Which of the two is thicker?

Answer»

Two fuse wires are rated 5 A and 20 A. Which of the two is thicker?

Discussion

34.	The current produced by an AC generator with slip rings is shown in graphs (1) and (2). Then which of the following correctly represent the variations in current with time?
Answer» The current produced by an AC generator with slip rings is shown in graphs (1) and (2). Then which of the following correctly represent the variations in current with time?

Discussion

35.	What is EMF? How it is related to other parameters of current electricity? What is it's application in electricity?
Answer» What is EMF? How it is related to other parameters of current electricity? What is it's application in electricity?

Discussion

36.	How does the speed of light in glass change on increasing the wavelength of light ?
Answer» How does the speed of light in glass change on increasing the wavelength of light ?

Discussion

37.	Two bulbs marked 200 watt-250 volts and 100 watt-250 volts are joined in series to 250 volts supply. Power consumed in circuit is:
Answer» Two bulbs marked 200 watt-250 volts and 100 watt-250 volts are joined in series to 250 volts supply. Power consumed in circuit is:

Discussion

38.	What are the advantages and disadvantages of a dry cell?
Answer» What are the advantages and disadvantages of a dry cell?

Discussion

39.	What is the order of the seven colors that we see after dispersion through a glass prism?
Answer» What is the order of the seven colors that we see after dispersion through a glass prism?

Discussion

40.	The magnetic field strength at a point due to a current carrying circular wire depends on _________.
Answer» The magnetic field strength at a point due to a current carrying circular wire depends on _________.

Discussion

41.	What is retina made up of?
Answer» What is retina made up of?

Discussion

42.	Two identical bedsheets one crumbled and the other stretched are kept for drying in the same sunlight a) which bed sheet will dry quickly? b) Explain the scientific reason for your answer.
Answer» Two identical bedsheets one crumbled and the other stretched are kept for drying in the same sunlight a) which bed sheet will dry quickly? b) Explain the scientific reason for your answer.

Discussion

43.	Fill in the following blanks with suitable words: Resistance is measured in _____. The resistance of a wire increases as the length _________. The resistance of a wire increases as the temperature________. The resistance of a wire increases as the cross-sectional area__________.
Answer» Fill in the following blanks with suitable words: Resistance is measured in _____. The resistance of a wire increases as the length _________. The resistance of a wire increases as the temperature________. The resistance of a wire increases as the cross-sectional area__________.

43.

Fill in the following blanks with suitable words: Resistance is measured in _. The resistance of a wire increases as the length _. The resistance of a wire increases as the temperature. The resistance of a wire increases as the cross-sectional area______.

Answer»

Fill in the following blanks with suitable words:
Resistance is measured in _____.

The resistance of a wire increases as the length _________.

The resistance of a wire increases as the temperature________.

The resistance of a wire increases as the cross-sectional area__________.

Discussion

44.	An object is placed between f and 2f of a convex lens. Which of the following statements correctly describes its image ? (a) real, larger than the object (c) inverted, same size as object
Answer» An object is placed between f and 2f of a convex lens. Which of the following statements correctly describes its image ? (a) real, larger than the object (c) inverted, same size as object

Discussion

45.	While performing the experiment to trace the path of a ray of light passing through a glass prism, four students marked the incident ray and the emergent ray in their diagrams in the manner shown below
Answer» While performing the experiment to trace the path of a ray of light passing through a glass prism, four students marked the incident ray and the emergent ray in their diagrams in the manner shown below

45.

While performing the experiment to trace the path of a ray of light passing through a glass prism, four students marked the incident ray and the emergent ray in their diagrams in the manner shown below

Answer»

While performing the experiment to trace the path of a ray of light passing through a glass prism, four students marked the incident ray and the emergent ray in their diagrams in the manner shown below

Discussion

46.	A boy of mass 50kg slides down a wooden plank 500cm high. Calculate the speed with which the boy will reach the ground.
Answer» A boy of mass 50kg slides down a wooden plank 500cm high. Calculate the speed with which the boy will reach the ground.

Discussion

47.	State whether the following statement is true or false : The planets twinkle at night due to atmospheric refraction of light.
Answer» State whether the following statement is true or false : The planets twinkle at night due to atmospheric refraction of light.

Discussion

48.	State two ways by which the speed of rotation of an electric motor can be increased.
Answer» State two ways by which the speed of rotation of an electric motor can be increased.

Discussion

49.	In the figure below, the EMF (ϵ) of the cell is 4 V. It reduces to 2 V, when connected to a 16 Ω load. Determine the internal resistance (r) of the cell in mΩ. 16000
Answer» In the figure below, the EMF ( $ϵ$ ) of the cell is $4 V$ . It reduces to $2 V$ , when connected to a $16 Ω$ load. Determine the internal resistance ( $r$ ) of the cell in $m Ω$ . 16000

49.

In the figure below, the EMF (ϵ) of the cell is 4 V. It reduces to 2 V, when connected to a 16 Ω load. Determine the internal resistance (r) of the cell in mΩ. 16000

Answer» In the figure below, the EMF (

ϵ

) of the cell is

4 V

. It reduces to

2 V

, when connected to a

16 Ω

load. Determine the internal resistance (

r

) of the cell in

m Ω

.

16000

Discussion

50.	Question 5 Identify the circuit (figure) in which the electrical components have been properly connected. (a) (i) (b) (ii) (c) (iii) (d) (iv)
Answer» Question 5 Identify the circuit (figure) in which the electrical components have been properly connected. (a) (i) (b) (ii) (c) (iii) (d) (iv)

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is the definition of light . Is light a ray or wave or particles(photons).

Which is eco friendly? Wearing an extra sweater or using a heating device on cold days?

A current of 0.1A was passed for 2hr through a solution of cuprocyanide and 0.3745g of copper was deposited on the cathode. Calculate the current efficiency for the copper deposition ( Cu = 63.5) Ans : 79% Please give detailed explanation as I won't be able to understand concise answers.

Differentiate between Geothermal energy and Tidal energy?

The radius of the driving wheel of a set of gears is 18 cm. It has 100 teeth and rotates at a speed of 30 rpm. If the driven wheel rotates at a speed of 150 rpm, what is the radius of the driven wheel.

A mono atomic gas is supplied the heat Q very slowly keeping the pressure constant. The work done by the gas will be

Give three advantages of DC over AC..

In these diagrams, the angle of refraction r has been correctly marked in which diagram?

A convex lens forms an image of the same size as the object at a distance of 30 cm from the lens. Find the total length of the lens. Also find power of the lens. What is the distance of the object from the lens?

Three 2 V cells are connected in series and used as a battery in a circuit. (a) What is the p.d. at the terminals of the battery? (b) How many joules of electrical energy does 1 C gain on passing through (i) one cell (ii) all three cells?

The lens of power + 1.0 D is : (a) convex of focal length 1.0 cm (b) convex of focal length 1.0 m (c) concave of focal length 1.0 cm (d) concave of focal length 1.0 m

The substance having infinitely high electrical resistance is called: (a) conductor (b) resistor (c) superconductor (d) insulator

An electrical appliance has a resistance of 25Ω when this electrical appliance is connected to a 230 V supply line, the current passing through it will be:

___ has high calorific value, burns readily and can be used as fuel in homes and automobiles.

Consider a two-particle system with the particles having masses m1 and m2. If the first particle is pushed towards the centre of mass through a distance d, by what distance should the second particle be moved so as to keep the centre of mass at the same position?

When the current in a conductor is doubled, keeping other parameters constant, the heating effect of the current will become:

Choose the correct statement/statements from the following options regarding the magnetic field lines of an electromagnet.

Which of the following is/are correct pair/s?

One of the following don't represent electrical power a . I²R b. IR² c . VI d. V² by R

What is the difference between the AC and DC motor. And which one is motor or generator??

Luke Skywalker has a mass of 13kg and weight of 127.4N on Earth. Find his weight on the Endor moon. Acceleration on Endor due to gravity is 2ms−2.

How is it so that a bulb glows as soon as it's switch on; though the electron drift Wat the speed of 1 or 2 cm/ s

An object is placed at a long distance in front of a convex mirror of radius of curvature 30 cm. State the position of its image.

A virtual image of an object is formed by a concave lens. The lens is then coupled (placed in contact) with a convex lens. A virtual image is again formed. The image, now

Which effect fo current is utilised in the working of an elelctric fuse?

Two identical immersion heaters are to be used to heat water, in a large container. Which connection will produce more heat in series or in parallel?

Is the magnetic field produced by a straight current carrying wire uniform?

The refractive index of water is : (a) 1.33 (b) 1.50 (c) 2.42 (d) 1.36

Why do the tendrils of the climbers grow around the hard support?

Two fuse wires are rated 5 A and 20 A. Which of the two is thicker?

The current produced by an AC generator with slip rings is shown in graphs (1) and (2). Then which of the following correctly represent the variations in current with time?

What is EMF? How it is related to other parameters of current electricity? What is it's application in electricity?

How does the speed of light in glass change on increasing the wavelength of light ?

Two bulbs marked 200 watt-250 volts and 100 watt-250 volts are joined in series to 250 volts supply. Power consumed in circuit is:

What are the advantages and disadvantages of a dry cell?

What is the order of the seven colors that we see after dispersion through a glass prism?

The magnetic field strength at a point due to a current carrying circular wire depends on _________.

What is retina made up of?

Two identical bedsheets one crumbled and the other stretched are kept for drying in the same sunlight a) which bed sheet will dry quickly? b) Explain the scientific reason for your answer.

Fill in the following blanks with suitable words: Resistance is measured in _____. The resistance of a wire increases as the length _________. The resistance of a wire increases as the temperature________. The resistance of a wire increases as the cross-sectional area__________.

An object is placed between f and 2f of a convex lens. Which of the following statements correctly describes its image ? (a) real, larger than the object (c) inverted, same size as object

While performing the experiment to trace the path of a ray of light passing through a glass prism, four students marked the incident ray and the emergent ray in their diagrams in the manner shown below

A boy of mass 50kg slides down a wooden plank 500cm high. Calculate the speed with which the boy will reach the ground.

State whether the following statement is true or false : The planets twinkle at night due to atmospheric refraction of light.

State two ways by which the speed of rotation of an electric motor can be increased.

In the figure below, the EMF (ϵ) of the cell is 4 V. It reduces to 2 V, when connected to a 16 Ω load. Determine the internal resistance (r) of the cell in mΩ. 16000

Question 5 Identify the circuit (figure) in which the electrical components have been properly connected. (a) (i) (b) (ii) (c) (iii) (d) (iv)

Fill in the following blanks with suitable words: Resistance is measured in _. The resistance of a wire increases as the length _. The resistance of a wire increases as the temperature. The resistance of a wire increases as the cross-sectional area______.