Explore topic-wise MCQs in Physics.

This section includes 301 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.

1.

Consider the following statements
An ordinary light bulb has a rather short life because the
1. Filament wire is not uniform
2. Bulb cannot be evacuated completely
3. Wires supporting the filament melt at high temperatures.
Which of the above statements are correct?

A. 1 and 3
B. 2 and 3
C. 1 and 2
D. 1, 2 and 3
Answer» C. 1 and 2
Discussion
2.

Consider the following statements regarding a motor car battery
1. The voltage usually 12 V
2. Electrolyte used in hydrochloric acid
3. Electrodes are lead and copper
4. Capacity is expressed in ampere-hour
Which of the above statements are correct?

A. 1 and 2
B. 2 and 3
C. 3 and 4
D. 1 and 4
Answer» E.
Discussion
3.

Consider the following statements
1. An isolated electric charge exist, but an isolated magnetic monopole does not exist.
2. Electric lines of force are not closed, but magnetic lines of force are closed
Which of the statements given above is / are correct?

A. 1 only
B. 2 only
C. Both 1 and 2
D. Neither 1 nor 2
Answer» D. Neither 1 nor 2
Discussion
4.

The SI unit of pole strength is

A. Am
B. Am
C. Am
D. Am
Answer» E.
Discussion
5.

What is the difference between a CFL and an LED LAMP ?
1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semi-conductor material.
2. The average life span of a CFL is much longer than of an LED lamp.
3. A CFL is LESS energy-efficient as compared to an LED lamp.
Which of the statements given above is / are correct ?

A. 1 only
B. 2 and 3
C. 1 and 3
D. 1, 2 and 3
Answer» D. 1, 2 and 3
Discussion
6.

Assertion (A) : In our houses, the current in AC electricity line changes direction 60 times per second.
Reason (R): The frequency of alternating voltage supplied is 50 Hz.

A. Both A and R are individually true and R is the correct explanation of A.
B. Both A and R are individually true but R is not the correct explanation of A
C. A is true but is false
D. A is false but R is true
Answer» E.
Discussion
7.

Consider the following statements
At the present level of technology available in India, Solar energy can be conveniently used to
1. Supply hot water to residential buildings
2. Supply water for minor irrigation projects
3. Provide street lighting
4. Electrify a cluster of villages and small towns

A. 1, 2, 3 and 4 are correct
B. 2 and 4 are correct
C. 1 and 3 are correct
D. 1, 2 and 3 are correct
Answer» D. 1, 2 and 3 are correct
Discussion
8.

Consider the following statements regarding electric fuse wire
1. If has low melting point
2. It has very high specific resistance
3. It is connected in parallel with the electric circuit
Which of the statements given above is / are correct?

A. 1 only
B. 1 and 3
C. 1 and 2
D. 2 and 3
Answer» B. 1 and 3
Discussion
9.

Au, Ag, Cu, Zn, Sb, Bi, H2O and air are examples of

A. Diamagnetic
B. Paramagnetic
C. Ferromagnetic
D. None of these
Answer» B. Paramagnetic
Discussion
10.

What is the source of electrical energy in an artificial satellite ?

A. Solar cell
B. Mine nuclear reactor
C. Dynamo
D. Thermopile
Answer» B. Mine nuclear reactor
Discussion
11.

The filament of an electric bulb is made of

A. copper
B. aluminium
C. lead
D. tungsten
Answer» E.
Discussion
12.

What type of electromagnetic radiation is used in the remote control of a television ?

A. Infrared
B. Ultraviolet
C. Visible
D. None of these
Answer» B. Ultraviolet
Discussion
13.

A 100 watt bulb is kept switched ON for four hours. The units of electrical energy consumed is

A. 400 unit
B. 25 unit
C. 4 unit
D. 0.4 unit
Answer» E.
Discussion
14.

Tube light is filled with

A. Sodium vapour
B. argon gas at low pressure
C. mercury vapour at low pressure
D. mercuric oxide and argon gas
Answer» E.
Discussion
15.

Magnetic field due to an infinite current carrying wire varies with the distance (r) from the wire as

A. r
B. r
C. 1 / r
D. 1 / r
Answer» D. 1 / r
Discussion
16.

The susceptibility of para magnetic material is

A. Small and negative
B. Small and positive
C. Large and negative
D. large and positive
Answer» C. Large and negative
Discussion
17.

A small piece of an unmagnetized material gets repelled when it is brought near a powerful magnet the material is

A. Paramagnetic
B. Diamagnetic
C. Ferromagnetic
D. Non magnetic
Answer» C. Ferromagnetic
Discussion
18.

A hydrogen atom is para magnetic. A hydrogen molecule is

A. Diamagnetic
B. Paramagnetic
C. Ferromagnetic
D. None of these
Answer» B. Paramagnetic
Discussion
19.

If a diamagnetic substance is brought near north and south pole of a bar magnet, is

A. Attracted by poles
B. Repelled by poles
C. Attracted by north pole and repelled by the south pole
D. None of the above
Answer» C. Attracted by north pole and repelled by the south pole
Discussion
20.

Choke used to limit high frequency AC has

A. A paramagnetic core
B. A diamagnetic core
C. Air core
D. Iron core
Answer» E.
Discussion
21.

Which type of cell can be used if a device requires 75 A of current for 15 seconds ?

A. Simple voltaic cell
B. Daniel cell
C. Leclanche cell
D. Lead-acid cell
Answer» E.
Discussion
22.

A straight horizontal conductor carries a steady electric current from south to north.
Which one of the following events would happen if a small magnetic compass is placed just above the wire?

A. The needle remains perpendicular to the conductor
B. The needle remains parallel to the conductor
C. The north pole of the needle is deflected towards east
D. The north pole of the needle is deflected toward west
Answer» D. The north pole of the needle is deflected toward west
Discussion
23.

Soft iron is used in many parts of electrical machines for

A. Low hysteresis loss and low permeability
B. High hysteresis loss and low permeability
C. Low hysteresis loss and high permeability
D. High hysteresis loss and high permeability
Answer» D. High hysteresis loss and high permeability
Discussion
24.

1 volt equals

A. 1 J
B. 1 J / C
C. 1 C / J
D. none of these
Answer» C. 1 C / J
Discussion
25.

Which of the following properties is processed by the ferromagnetic substance ?

A. Directional property
B. Alternating magnetic substance
C. Hysterasis
D. Susceptability
Answer» D. Susceptability
Discussion
26.

An electron is projected in the magnetic field along the lines of force

A. There will be no effect on the motion of the electron
B. The electron speed will increase but the direction will not change
C. The elector speed will decrease but direction will not change
D. None of the above
Answer» B. The electron speed will increase but the direction will not change
Discussion
27.

The unit of magnetic induction is

A. Weber / m
B.
C. Weber / meter
D. Weber
E. None of these
Answer» B.
Discussion
28.

The capacitance of parallel plate condenser does not depend on

A. Area of the plate
B. Metal of the plate
C. Medium between the plate
D. Distance between the plate
Answer» C. Medium between the plate
Discussion
29.

Electric field intensity at a point in hollow charged spherical conductor

A. Is zero
B. Is constant
C. Increase with the distance from the centre of the sphere
D. None of the above
Answer» B. Is constant
Discussion
30.

For an electric dipole, the field at a point on the equatorial line and the dipole moment are

A. In the same direction
B. In opposite direction
C. Perpendicular to each other
D. Not related
Answer» C. Perpendicular to each other
Discussion
31.

According to Coulomb's law, the electrostatic force between two charges is

A. Inversely proportional to the product of the charges
B. Inversely proportional to the square of the distance between the charges
C. Directly proportional to the cube of the distance between charges
D. None of the above
Answer» C. Directly proportional to the cube of the distance between charges
Discussion
32.

The electric field due to a dipole at a distance r from its center is proportional to

A. 1 / r
B. r
C. r
D. 1 / r
Answer» B. r
Discussion
33.

Current provided by a battery is maximum when

A. Internal resistance is equal to external resistance
B. Internal resistance is greater than external resistance
C. Internal resistance is less than external resistance
D. None of the above
Answer» B. Internal resistance is greater than external resistance
Discussion
34.

The core of a transformer is laminated so that

A. Ratio of the voltage across the secondary and primary is doubled
B. The weight of the transformer can be kept low
C. The rusting of the core is prevented
D. Energy loss due to eddy currents is minimised
Answer» E.
Discussion
35.

The magnetic induction associated with currents flowing in a hollow copper tube will be

A. Only inside
B. only out side
C. Both inside and outside
D. Neither inside nor outside
Answer» C. Both inside and outside
Discussion
36.

When a charged particle enters a uniform magnetic field. its kinetic energy

A. Remains constant
B. Increases
C. Decreases
D. Becomes zero
Answer» B. Increases
Discussion
37.

At a point inside a charged conductor the

A. Electric field is zero
B. Electric field is constant
C. Potential is constant
D. (a) and (c) both
Answer» E.
Discussion
38.

The electric potential at the center of a charged conductor is

A. Zero
B. Twice that to the surface
C. Same as on the surface
D. None of the above
Answer» D. None of the above
Discussion
39.

A particle is moving in a uniform magnetic field.

A. Its momentum changes but total energy remains same
B. Both momentum and total energy remains same
C. Both momentum and total energy change
D. Total energy changes but momentum remains the same
Answer» B. Both momentum and total energy remains same
Discussion
40.

Metals getting magnetized by orientation of atomic magnetic moments in external magnetic field are called

A. Ferromagnetic
B. Anti-magnetic
C. Paramagnetic
D. Diamagnetic
Answer» D. Diamagnetic
Discussion
41.

If a current is passed in a spring, it

A. Gets compressed
B. Gets expanded
C. Oscillates
D. Remains unchanged
Answer» B. Gets expanded
Discussion
42.

A substance, when inserted between the poles of a magnet, is pushed out, it is

A. Diamagnetic
B. Paramagnetic
C. Ferromagnetic
D. None of these
Answer» B. Paramagnetic
Discussion
43.

By inserting a soft iron piece into solenoid, the strength of the magnetic field

A. Increase
B. Decrease
C. First increase then decrease
D. Remains unchanged
Answer» B. Decrease
Discussion
44.

Consider the following statements household electrical appliances are not usually connected in series, because
1. Switching of an appliance would switch off the rest
2. A fuse would blow as soon as one appliance is used.
3. Power consumption would be very much greater
4. The appliance would get damaged due to high current.
Which of these statements are correct?

A. 1 only
B. 2 and 3
C. 3 and 4
D. 1, 2 and 4
Answer» B. 2 and 3
Discussion
45.

Phase difference between voltage and current in a capacitor in AC circuit is

A.
B. / 2
C. 0
D. / 3
Answer» C. 0
Discussion
46.

The material of a permanent magnet has

A. High retentivity, low coercivity
B. Low retentivity, low corecivity
C. Low retentivity, high coercivity
D. High retentivity, high coercivity
Answer» E.
Discussion
47.

Domestic electrical wiring is basically a

A. series connection
B. parallel connection
C. combination of series and parallel connections
D. series connection within each room and parallel connection elsewhere
Answer» C. combination of series and parallel connections
Discussion
48.

What is the order of magnitude of electric resistance of the human body (dry) ?

A. 102 ohm
B. 104 ohm
C. 106 ohm
D. 108 ohm
Answer» C. 106 ohm
Discussion
49.

A compass needle just above a wire in which electrons are moving towards, will point

A. East
B. West
C. North
D. South
Answer» E.
Discussion
50.

The statement "Algebraic sum of the current meeting at a node is zero"

A. Ampere's law
B. Lenz's law
C. Faraday;s law
D. Kirchhoff's law
Answer» E.
Discussion