16569 + Interview Questions in Physics

1.	Sun appears red at sunrise and sunset. This is due to light having shorter wavelengths gets scattered away.longer wavelengths gets scattered away.lower frequencies gets scattered away.all frequencies gets scattered away.
Answer» Sun appears red at sunrise and sunset. This is due to light having shorter wavelengths gets scattered away. longer wavelengths gets scattered away. lower frequencies gets scattered away. all frequencies gets scattered away.

1.

Sun appears red at sunrise and sunset. This is due to light having shorter wavelengths gets scattered away.longer wavelengths gets scattered away.lower frequencies gets scattered away.all frequencies gets scattered away.

Answer»

Sun appears red at sunrise and sunset. This is due to light having

shorter wavelengths gets scattered away.

longer wavelengths gets scattered away.

lower frequencies gets scattered away.

all frequencies gets scattered away.

Discussion

2.	An observer stands at a distance of 850 m from the cliff and fires a gun. After what time gap will he hear the echo, if sound travels at a speed of 350ms−1 in air?
Answer» An observer stands at a distance of $850 m$ from the cliff and fires a gun. After what time gap will he hear the echo, if sound travels at a speed of $350 m s^{- 1}$ in air?

Discussion

3.	Which of the following represents electrical power dissipated in an electrical circuit?
Answer» Which of the following represents electrical power dissipated in an electrical circuit?

Discussion

4.	The power of engine of a car of mass 1200 kg is 25kW. The minimum time required to reach a velocity of 90km/he by the car after starting from rest is-???
Answer» The power of engine of a car of mass 1200 kg is 25kW. The minimum time required to reach a velocity of 90km/he by the car after starting from rest is-???

Discussion

5.	If g is the acceleration due to gravity on the surface of the earth, it's value at a height equal to triple the radius of earth is (assuming the earth to be a perfect sphere)
Answer» If g is the acceleration due to gravity on the surface of the earth, it's value at a height equal to triple the radius of earth is (assuming the earth to be a perfect sphere)

Discussion

6.	Question 9 What happens to the image distance when we increase the distance of an object from the eye?
Answer» Question 9 What happens to the image distance when we increase the distance of an object from the eye?

Discussion

7.	A hydroelectric power station takes its water from a lake whose water level is 50 m above the turbine. Assuming an overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1 MW. (g = 10 ms–2)
Answer» A hydroelectric power station takes its water from a lake whose water level is 50 m above the turbine. Assuming an overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1 MW. (g = 10 ms^–2)

Discussion

8.	A convex lens is a ________ and a concave lens is a _________.
Answer» A convex lens is a ________ and a concave lens is a _________.

Discussion

9.	A ray of light falling on a lens passes through it undeviated when the
Answer» A ray of light falling on a lens passes through it undeviated when the

Discussion

10.	Using the circuit given below, state which of the following statement is correct? (a) When S1 and S2 are closed, lamps A and B are lit. (b) With S1open and S2 closed, A is lit and B is not lit. (c) With S2 open and S1 closed A and B are lit. (d) With S1 closed and S2 open, lamp A remains lit een if lamp B gets fused.
Answer» Using the circuit given below, state which of the following statement is correct? (a) When $S_{1}$ and $S_{2}$ are closed, lamps A and B are lit. (b) With $S_{1}$ open and $S_{2}$ closed, A is lit and B is not lit. (c) With $S_{2}$ open and $S_{1}$ closed A and B are lit. (d) With $S_{1}$ closed and $S_{2}$ open, lamp A remains lit een if lamp B gets fused.

10.

Using the circuit given below, state which of the following statement is correct? (a) When S1 and S2 are closed, lamps A and B are lit. (b) With S1open and S2 closed, A is lit and B is not lit. (c) With S2 open and S1 closed A and B are lit. (d) With S1 closed and S2 open, lamp A remains lit een if lamp B gets fused.

Answer»

Using the circuit given below, state which of the following statement is correct?

(a) When $S_{1}$ and $S_{2}$ are closed, lamps A and B are lit.
(b) With $S_{1}$ open and $S_{2}$ closed, A is lit and B is not lit.
(c) With $S_{2}$ open and $S_{1}$ closed A and B are lit.
(d) With $S_{1}$ closed and $S_{2}$ open, lamp A remains lit een if lamp B gets fused.

Discussion

11.	Calculate the Mechanical Advantage(M.A) for a load of 40 N, when the required force to lift the load is 15 N.
Answer» Calculate the Mechanical Advantage(M.A) for a load of 40 N, when the required force to lift the load is 15 N.

Discussion

12.	When a nucleus emits alpha radiation, its mass number drops by ___(digit).
Answer» When a nucleus emits alpha radiation, its mass number drops by ___(digit).

Discussion

13.	Match the following in most appropriate way: Part of eyeFunctiona)Irisp)Converts the lightinto neural signals, and send these signals on to the brain for visual recognition.b) Pupilq)Primarily focusesand controls the entrance of light into the eye.c)Retinar)Controls size of pupil and amount of light reachingthe retina.d)Corneas)Focuses light onto the retina and help the eye to focus on objects at different distances.
Answer» Match the following in most appropriate way: $\begin{matrix} Part of eye & Function a) Iris & p) Converts the light into neural signals, and send these signals on to the brain for visual recognition . b) Pupil & q) Primarily focuses and controls the entrance of light into the eye. c) Retina & r) Controls size of pupil and amount of light reaching the retina. d) Cornea & s) Focuses light onto the retina and help the eye to focus on objects at different distances. \end{matrix}$

Discussion

14.	Argon – 40 and Calcium – 40 are the examples of ___.
Answer» Argon – 40 and Calcium – 40 are the examples of ___.

Discussion

15.	Why do we observe random wavering or flickering of the objects near a fire or on a very hot day? [1 MARK]
Answer» Why do we observe random wavering or flickering of the objects near a fire or on a very hot day? [1 MARK]

Discussion

16.	Resistors R1=10Ω, R2 = 40Ω, R3 = 30Ω, R4 = 20Ω, R5 = 60Ω and a 12V battery is connected as shown. Calculate: (a) the total resistance (b) the total current flowing in the circuit. [3 MARKS]
Answer» Resistors $R_{1}$ =10 $Ω$ , $R_{2}$ = 40 $Ω$ , $R_{3}$ = 30 $Ω$ , $R_{4}$ = 20 $Ω$ , $R_{5}$ = 60 $Ω$ and a 12V battery is connected as shown. Calculate: (a) the total resistance (b) the total current flowing in the circuit. [3 MARKS]

16.

Resistors R1=10Ω, R2 = 40Ω, R3 = 30Ω, R4 = 20Ω, R5 = 60Ω and a 12V battery is connected as shown. Calculate: (a) the total resistance (b) the total current flowing in the circuit. [3 MARKS]

Answer»

Resistors $R_{1}$ =10 $Ω$ , $R_{2}$ = 40 $Ω$ , $R_{3}$ = 30 $Ω$ , $R_{4}$ = 20 $Ω$ , $R_{5}$ = 60 $Ω$ and a 12V battery is connected as shown.

Calculate:
(a) the total resistance
(b) the total current flowing in the circuit. [3 MARKS]

Discussion

17.	A person rubbed two similar glass rods using a silk cloth. Turns out that the glass rods started to move away from each other slightly when they were placed together. What can be most logical reason for this observation?
Answer» A person rubbed two similar glass rods using a silk cloth. Turns out that the glass rods started to move away from each other slightly when they were placed together. What can be most logical reason for this observation?

Discussion

18.	What is the difference between TIR & normal reflection?
Answer» What is the difference between TIR & normal reflection?

Discussion

19.	Fill in the following blanks with suitable words : (a) A fuse should always be placed in the ........... wire of a mains circuit. (b) The earth wire should be connected to the ............ of an appliance.
Answer» Fill in the following blanks with suitable words : (a) A fuse should always be placed in the ........... wire of a mains circuit. (b) The earth wire should be connected to the ............ of an appliance.

19.

Fill in the following blanks with suitable words : (a) A fuse should always be placed in the ........... wire of a mains circuit. (b) The earth wire should be connected to the ............ of an appliance.

Answer»

Fill in the following blanks with suitable words :

(a) A fuse should always be placed in the ........... wire of a mains circuit.

(b) The earth wire should be connected to the ............ of an appliance.

Discussion

20.	Write symbols and state functions of each of the following components in an electric circuit: (i) key, (ii) cell, (iii) rheostat, (iv) ammeter, and (v) voltmeter.
Answer» Write symbols and state functions of each of the following components in an electric circuit: (i) key, (ii) cell, (iii) rheostat, (iv) ammeter, and (v) voltmeter.

20.

Write symbols and state functions of each of the following components in an electric circuit: (i) key, (ii) cell, (iii) rheostat, (iv) ammeter, and (v) voltmeter.

Answer»

Write symbols and state functions of each of the following components in an electric circuit:

(i) key, (ii) cell, (iii) rheostat, (iv) ammeter, and (v) voltmeter.

Discussion

21.	The magnifying power of a simple microscope can be increased, if we use eye-piece of
Answer» The magnifying power of a simple microscope can be increased, if we use eye-piece of

Discussion

22.	Q13. Van Dhan Vikas Kendra is an initiative of Ministry of
Answer» Q13. Van Dhan Vikas Kendra is an initiative of Ministry of

Discussion

23.	Where is the image formed?
Answer» Where is the image formed?

Discussion

24.	If an ideal pulley system can lift a load of 2000 N by an effort of 500 N. Find its velocity ratio.4
Answer» If an ideal pulley system can lift a load of $2000 N$ by an effort of $500 N$ . Find its velocity ratio. 4

Discussion

25.	At what point a real image and virtual image are formed? A 3 cm high object is placed at a distance of 80 cm from a concave lens of focal length 20 cm. Find the position and size of the image. [5 MARKS]
Answer» At what point a real image and virtual image are formed? A 3 cm high object is placed at a distance of 80 cm from a concave lens of focal length 20 cm. Find the position and size of the image. [5 MARKS]

Discussion

26.	The primary coil of a transformer has 800 turns and the secondary coil has 8 turns.It is connected to a 220 V a.c. supply.What will be the output voltage?
Answer» The primary coil of a transformer has 800 turns and the secondary coil has 8 turns.It is connected to a 220 V a.c. supply.What will be the output voltage?

Discussion

27.	The focal length of a spherical mirror of radius of curvature 30 cm is : (a) 10 cm (b) 15 cm (c) 20 cm (d) 30 cm
Answer» The focal length of a spherical mirror of radius of curvature 30 cm is : (a) 10 cm (b) 15 cm (c) 20 cm (d) 30 cm

Discussion

28.	What is staircase wiring system?
Answer» What is staircase wiring system?

Discussion

29.	The center of mass or center of gravity is used___
Answer» The center of mass or center of gravity is used___

Discussion

30.	Identify the type of lens or mirror placed at XY where O is object and I is image. (O is place between pole and focus)
Answer» Identify the type of lens or mirror placed at XY where O is object and I is image. (O is place between pole and focus)

30.

Identify the type of lens or mirror placed at XY where O is object and I is image. (O is place between pole and focus)

Answer»

Identify the type of lens or mirror placed at XY where O is object and I is image. (O is place between pole and focus)

Discussion

31.	State and define the S.I. unit of power.
Answer» State and define the S.I. unit of power.

Discussion

32.	According to the conventions, direction of flow of electric current is taken from positive terminal to negative terminal of battery, which is opposite to the flow of ___.
Answer» According to the conventions, direction of flow of electric current is taken from positive terminal to negative terminal of battery, which is opposite to the flow of ___.

Discussion

33.	Find the value of ‘I’ for the following circuit.
Answer» Find the value of ‘I’ for the following circuit.

33.

Find the value of ‘I’ for the following circuit.

Answer»

Find the value of ‘I’ for the following circuit.

Discussion

34.	Doesn't electricity exist because of the flow of electrons of atoms to fill an octet?? Explain briefly.
Answer» Doesn't electricity exist because of the flow of electrons of atoms to fill an octet?? Explain briefly.

Discussion

35.	The work done in shifting a baggage from first floor of a building to the second floor is 100 J. The change in gravitational potential energy of the baggage is
Answer» The work done in shifting a baggage from first floor of a building to the second floor is 100 J. The change in gravitational potential energy of the baggage is

Discussion

36.	Difference between resistance and specific resistance.
Answer» Difference between resistance and specific resistance.

Discussion

37.	When the concentration, pressure or temperature of a system at equilibrium is changed, the system will readjust itself so as to nullify the effect of that change and attain a new state of equilibrium. This principle is called ___.
Answer» When the concentration, pressure or temperature of a system at equilibrium is changed, the system will readjust itself so as to nullify the effect of that change and attain a new state of equilibrium. This principle is called ___.

Discussion

38.	The diagram in Fig. shows a coil of several turns of copper wire near a magnet NS. The coil is moved in the direction of arrow shown in the diagram. (i) In what direction does the induced current flow in the coil ? (ii) Name the law used to arrive at the conclusion in part (1). (iii) How would the current in coil be altered if (a) the coil has twice the number of turns, (b) the coil was made to move three times fast ?
Answer» The diagram in Fig. shows a coil of several turns of copper wire near a magnet NS. The coil is moved in the direction of arrow shown in the diagram. (i) In what direction does the induced current flow in the coil ? (ii) Name the law used to arrive at the conclusion in part (1). (iii) How would the current in coil be altered if (a) the coil has twice the number of turns, (b) the coil was made to move three times fast ?

38.

The diagram in Fig. shows a coil of several turns of copper wire near a magnet NS. The coil is moved in the direction of arrow shown in the diagram. (i) In what direction does the induced current flow in the coil ? (ii) Name the law used to arrive at the conclusion in part (1). (iii) How would the current in coil be altered if (a) the coil has twice the number of turns, (b) the coil was made to move three times fast ?

Answer»

The diagram in Fig. shows a coil of several turns of copper wire near a magnet NS. The coil is moved in the direction of arrow shown in the diagram.
(i) In what direction does the induced current flow in the coil ?
(ii) Name the law used to arrive at the conclusion in part (1).
(iii) How would the current in coil be altered if (a) the coil has twice the number of turns, (b) the coil was made to move three times fast ?

Discussion

39.	The depth of a water pond appears to be lesser on account of :
Answer» The depth of a water pond appears to be lesser on account of :

Discussion

40.	Internal energy of a system increases by 60 J when 140 J of heat is added to the gaseous system. The amount of work done would be:
Answer» Internal energy of a system increases by 60 J when 140 J of heat is added to the gaseous system. The amount of work done would be:

Discussion

41.	What are the advantages of a modular space station over a monolithic space station?
Answer» What are the advantages of a modular space station over a monolithic space station?

Discussion

42.	Electricity can be used to replace the fuel and power a rocket (using today's mechanism) just like an electric car.
Answer» Electricity can be used to replace the fuel and power a rocket (using today's mechanism) just like an electric car.

Discussion

43.	What pressure is maintained in the contact tower?
Answer» What pressure is maintained in the contact tower?

Discussion

44.	What is/are the unit/units of heat?
Answer» What is/are the unit/units of heat?

Discussion

45.	The 'coolants' which can be used in the reactor of a nulcear power station are : (a) liquid mercury and nitrogen dioxide (b) liquid sodium and carbon dioxide (c) liquid ammonia and carbon monoxide (d) liquid boron and uranium oxide.
Answer» The 'coolants' which can be used in the reactor of a nulcear power station are : (a) liquid mercury and nitrogen dioxide (b) liquid sodium and carbon dioxide (c) liquid ammonia and carbon monoxide (d) liquid boron and uranium oxide.

Discussion

46.	Phenomenon of beats is not used in
Answer» Phenomenon of beats is not used in

Discussion

47.	What is the temperature of mixture formed when 5 g of ice at 00C is placed in 200 g of water at 100C in a copper calorimeter of heat capacity 25 J/ 0C?
Answer» What is the temperature of mixture formed when 5 g of ice at 0⁰C is placed in 200 g of water at 10⁰C in a copper calorimeter of heat capacity 25 J/ ⁰C?

Discussion

48.	The magnetic potential energy stored in certain inductor is 80 mJ. When the current is 100 mA, then the inductance of given inductor will be
Answer» The magnetic potential energy stored in certain inductor is $80 m J$ . When the current is $100 m A$ , then the inductance of given inductor will be

Discussion

49.	Which of these is/are the useful effect(s) of visible light?
Answer» Which of these is/are the useful effect(s) of visible light?

Discussion

50.	Karan has heard about the water cycle but is not sure about what it is. Can you explain the water cycle to him? (Give an elaborate description with a diagram) [5 MARKS]
Answer» Karan has heard about the water cycle but is not sure about what it is. Can you explain the water cycle to him? (Give an elaborate description with a diagram) [5 MARKS]

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Sun appears red at sunrise and sunset. This is due to light having shorter wavelengths gets scattered away.longer wavelengths gets scattered away.lower frequencies gets scattered away.all frequencies gets scattered away.

An observer stands at a distance of 850 m from the cliff and fires a gun. After what time gap will he hear the echo, if sound travels at a speed of 350ms−1 in air?

Which of the following represents electrical power dissipated in an electrical circuit?

The power of engine of a car of mass 1200 kg is 25kW. The minimum time required to reach a velocity of 90km/he by the car after starting from rest is-???

If g is the acceleration due to gravity on the surface of the earth, it's value at a height equal to triple the radius of earth is (assuming the earth to be a perfect sphere)

Question 9 What happens to the image distance when we increase the distance of an object from the eye?

A hydroelectric power station takes its water from a lake whose water level is 50 m above the turbine. Assuming an overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1 MW. (g = 10 ms–2)

A convex lens is a ________ and a concave lens is a _________.

A ray of light falling on a lens passes through it undeviated when the

Calculate the Mechanical Advantage(M.A) for a load of 40 N, when the required force to lift the load is 15 N.

When a nucleus emits alpha radiation, its mass number drops by ___(digit).

Argon – 40 and Calcium – 40 are the examples of ___.

Why do we observe random wavering or flickering of the objects near a fire or on a very hot day? [1 MARK]

Resistors R1=10Ω, R2 = 40Ω, R3 = 30Ω, R4 = 20Ω, R5 = 60Ω and a 12V battery is connected as shown. Calculate: (a) the total resistance (b) the total current flowing in the circuit. [3 MARKS]

A person rubbed two similar glass rods using a silk cloth. Turns out that the glass rods started to move away from each other slightly when they were placed together. What can be most logical reason for this observation?

What is the difference between TIR &amp; normal reflection?

Fill in the following blanks with suitable words : (a) A fuse should always be placed in the ........... wire of a mains circuit. (b) The earth wire should be connected to the ............ of an appliance.

Write symbols and state functions of each of the following components in an electric circuit: (i) key, (ii) cell, (iii) rheostat, (iv) ammeter, and (v) voltmeter.

The magnifying power of a simple microscope can be increased, if we use eye-piece of

Q13. Van Dhan Vikas Kendra is an initiative of Ministry of

Where is the image formed?

If an ideal pulley system can lift a load of 2000 N by an effort of 500 N. Find its velocity ratio.4

At what point a real image and virtual image are formed? A 3 cm high object is placed at a distance of 80 cm from a concave lens of focal length 20 cm. Find the position and size of the image. [5 MARKS]

The primary coil of a transformer has 800 turns and the secondary coil has 8 turns.It is connected to a 220 V a.c. supply.What will be the output voltage?

The focal length of a spherical mirror of radius of curvature 30 cm is : (a) 10 cm (b) 15 cm (c) 20 cm (d) 30 cm

What is staircase wiring system?

The center of mass or center of gravity is used___

Identify the type of lens or mirror placed at XY where O is object and I is image. (O is place between pole and focus)

State and define the S.I. unit of power.

According to the conventions, direction of flow of electric current is taken from positive terminal to negative terminal of battery, which is opposite to the flow of ___.

Find the value of ‘I’ for the following circuit.

Doesn't electricity exist because of the flow of electrons of atoms to fill an octet?? Explain briefly.

The work done in shifting a baggage from first floor of a building to the second floor is 100 J. The change in gravitational potential energy of the baggage is

Difference between resistance and specific resistance.

When the concentration, pressure or temperature of a system at equilibrium is changed, the system will readjust itself so as to nullify the effect of that change and attain a new state of equilibrium. This principle is called ___.

The depth of a water pond appears to be lesser on account of :

Internal energy of a system increases by 60 J when 140 J of heat is added to the gaseous system. The amount of work done would be:

What are the advantages of a modular space station over a monolithic space station?

Electricity can be used to replace the fuel and power a rocket (using today's mechanism) just like an electric car.

What pressure is maintained in the contact tower?

What is/are the unit/units of heat?

The 'coolants' which can be used in the reactor of a nulcear power station are : (a) liquid mercury and nitrogen dioxide (b) liquid sodium and carbon dioxide (c) liquid ammonia and carbon monoxide (d) liquid boron and uranium oxide.

Phenomenon of beats is not used in

What is the temperature of mixture formed when 5 g of ice at 00C is placed in 200 g of water at 100C in a copper calorimeter of heat capacity 25 J/ 0C?

The magnetic potential energy stored in certain inductor is 80 mJ. When the current is 100 mA, then the inductance of given inductor will be

Which of these is/are the useful effect(s) of visible light?

Karan has heard about the water cycle but is not sure about what it is. Can you explain the water cycle to him? (Give an elaborate description with a diagram) [5 MARKS]

A convex lens is a and a concave lens is a _.

What is the difference between TIR & normal reflection?