Explore topic-wise MCQs in Physics.

This section includes 168 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.

51.

Vehicles use _____ to see the objects coming from behind.

A. Concave lens
B. Convex lens
C. Convex mirror
D. Concave mirror
Answer» C. Convex mirror
Discussion
52.

A bullet of mass m and velocity a is fired in to a large block of wood of mass M . The final velocity of the system is

A. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>M</center></td><td rowspan="2"></td><td rowspan="2">a</td></tr><tr><td style="text-align: center;">m + M</td></tr></table>
B. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>m</center></td><td rowspan="2"></td><td rowspan="2">a</td></tr><tr><td style="text-align: center;">m + M</td></tr></table>
C. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>m + M</center></td><td rowspan="2"></td><td rowspan="2">a</td></tr><tr><td style="text-align: center;">m </td></tr></table>
D. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>m + M</center></td><td rowspan="2"></td><td rowspan="2">a</td></tr><tr><td style="text-align: center;">M</td></tr></table>
Answer» C. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>m + M</center></td><td rowspan="2"></td><td rowspan="2">a</td></tr><tr><td style="text-align: center;">m </td></tr></table>
Discussion
53.

Railway tracks are banked on curves so that :

A. the train may not fall down inwards.
B. the weight of the train may be reduced.
C. necessary centripetal force may be obtained from the horizontal component of the normal reaction due to track.
D. no frictional force may be produced between the wheels and the track.
Answer» D. no frictional force may be produced between the wheels and the track.
Discussion
54.

X rays are

A. positively charged particles
B. negatively charged particles
C. neutral particles
D. None of these
Answer» D. None of these
Discussion
55.

It is easy to burst a gas-filled balloon with a neelde than with a nail. It is because

A. nail is more longer than needle.
B. nail exerts more pressure than needle on the balloon.
C. needle exerts more pressure than nail on the balloon.
D. gas is reactive with the needle.
Answer» D. gas is reactive with the needle.
Discussion
56.

Which of the following property of sound is affected by change in air temperature

A. Frequency
B. Intensity
C. Amplitude
D. Wavelength
Answer» E.
Discussion
57.

The dimensional formula ML

A. Modulus of elasticity
B. Viscosity
C. Moment of a force
D. Thrust
Answer» B. Viscosity
Discussion
58.

If the horizontal range of a projectile is four times its maximum height, the angle of projection is

A. 30
B. 45
C. <table><tr><td rowspan="2">sin<sup>-1</sup></td><td rowspan="2"><img src="https://www.indiabix.com/_files/images/data-interpretation/common/15-sym-oparen-h1.gif"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"><img src="https://www.indiabix.com/_files/images/data-interpretation/common/15-sym-cparen-h1.gif"></td><td rowspan="2"> </td></tr><tr><td style="text-align: center;">4</td><br></tr></table>
D. <table><tr><td rowspan="2">tan<sup>-1</sup></td><td rowspan="2"><img src="https://www.indiabix.com/_files/images/data-interpretation/common/15-sym-oparen-h1.gif"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"><img src="https://www.indiabix.com/_files/images/data-interpretation/common/15-sym-cparen-h1.gif"></td><td rowspan="2"> </td></tr><tr><td style="text-align: center;">4</td><br></tr></table>
Answer» C. <table><tr><td rowspan="2">sin<sup>-1</sup></td><td rowspan="2"><img src="https://www.indiabix.com/_files/images/data-interpretation/common/15-sym-oparen-h1.gif"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"><img src="https://www.indiabix.com/_files/images/data-interpretation/common/15-sym-cparen-h1.gif"></td><td rowspan="2"> </td></tr><tr><td style="text-align: center;">4</td><br></tr></table>
Discussion
59.

Kepler s law of planetary motion states that the square of the time period is proportional to the

A. semi-major axis
B. square of the semi-major axis
C. cube of the semi-major axis
D. fourth power of the semi-major axis
Answer» D. fourth power of the semi-major axis
Discussion
60.

A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does

A. The rubber ball suffers greater change in momentum
B. The metal ball suffers greater change in momentum
C. Both suffer the same change in momentum
D. The initial momentum of the rubber ball is greater than that of the metal ball
Answer» B. The metal ball suffers greater change in momentum
Discussion
61.

Persistence of vision is the Principle behind:

A. Binocular
B. Cinema
C. Periscope
D. Camera
Answer» C. Periscope
Discussion
62.

Farad is the unit of :

A. Capacitance
B. Inductance
C. Resistance
D. Conductance
Answer» B. Inductance
Discussion
63.

The dimension MLT 2 corresponds to

A. force
B. work done
C. acceleration
D. velocity
Answer» B. work done
Discussion
64.

The term reactor referred to in waste water treatment is

A. Vessel
B. Settling tank
C. Clarifier
D. Aeration tank
Answer» E.
Discussion
65.

Photon is the fundamental unit/ quantum of

A. gravitation
B. electricity
C. magnetism
D. light
Answer» E.
Discussion
66.

The damage of the human body due to radiation (X-rays or grays etc,) is measured in :

A. Rems
B. Roentgen
C. Curie
D. Rads
Answer» B. Roentgen
Discussion
67.

Dioptere is the unit of

A. power of a lens
B. focal length of a lens
C. light intensity
D. sound intensity
Answer» B. focal length of a lens
Discussion
68.

Centigrade and Fahrenheit temperatures are the same at

A. 32
B. 40
C. 273
D. 40
Answer» E.
Discussion
69.

Ohm s law is valid in case of

A. semiconductor
B. conductor
C. superconductor
D. insulator
Answer» C. superconductor
Discussion
70.

Two bodies kept at a certain distance feel a gravitational force F to each other. If the distance between them is made double the former distance, the force will be

A. 2F
B. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"></td><td rowspan="2">F</td></tr><tr><td style="text-align: center;">2 </td></tr></table>
C. 4F
D. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"></td><td rowspan="2">F</td></tr><tr><td style="text-align: center;">4 </td></tr></table>
Answer» E.
Discussion
71.

If the phase difference between two points is 120 for a wave with velocity of 360 m/ and frequency 500 Hz, then path difference between the two points is

A. 1 cm
B. 6 cm
C. 12 cm
D. 24 cm
Answer» E.
Discussion
72.

If a wire of resistance R is melted and recast to half of its length, then the new resistance of the wire will be

A. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>R</center></td><td rowspan="2"></td><td rowspan="2"> </td></tr><tr><td style="text-align: center;">4</td><br></tr></table>
B. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>R</center></td><td rowspan="2"></td><td rowspan="2"> </td></tr><tr><td style="text-align: center;">4</td><br></tr></table>
C. R
D. 2R
Answer» B. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>R</center></td><td rowspan="2"></td><td rowspan="2"> </td></tr><tr><td style="text-align: center;">4</td><br></tr></table>
Discussion
73.

The minimum number of forces to keep a particle in equilibrium is

A. 1
B. 2
C. 3
D. 4
Answer» C. 3
Discussion
74.

The Greenhouse effect is mainly due to increase in atmospheric

A. Ozone
B. Nitrogen
C. Sulphur dioxide
D. Carbon dioxide
Answer» E.
Discussion
75.

A particle is moving in a uniform circular motion with constant speed v along a circle of radius r. The acceleration-of the particle is

A. zero
B. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>V</center></td><td rowspan="2"></td><td rowspan="2"></td></tr><tr><td style="text-align: center;">r</td></tr></table>
C. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>V</center></td><td rowspan="2"></td><td rowspan="2"></td></tr><tr><td style="text-align: center;">r<sup>2</sup></td></tr></table>
D. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>V<sup>2</sup></center></td><td rowspan="2"></td><td rowspan="2"></td></tr><tr><td style="text-align: center;">r</td></tr></table>
Answer» E.
Discussion
76.

A moving neutron collides with a

A. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"></td><td rowspan="2"></td></tr><tr><td style="text-align: center;">4</td></tr></table>
B. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"></td><td rowspan="2"></td></tr><tr><td style="text-align: center;">4</td></tr></table>
C. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>9</center></td><td rowspan="2"></td><td rowspan="2"></td></tr><tr><td style="text-align: center;">25</td></tr></table>
D. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>9</center></td><td rowspan="2"></td><td rowspan="2"></td></tr><tr><td style="text-align: center;">25</td></tr></table>
Answer» E.
Discussion
77.

A wire of resistance R is cut into n equal parts. These parts are then connected in parallel. The equivalent resistance of the combination will be

A. nR
B. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>R</center></td><td rowspan="2"></td><td rowspan="2"></td></tr><tr><td style="text-align: center;">n</td></tr></table>
C. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>n</center></td><td rowspan="2"></td><td rowspan="2"></td></tr><tr><td style="text-align: center;">R</td></tr></table>
D. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>R</center></td><td rowspan="2"></td><td rowspan="2"></td></tr><tr><td style="text-align: center;">n<sup>2</sup></td></tr></table>
Answer» E.
Discussion
78.

The word insolation means

A. matters which insulate
B. incoming solar radiation
C. insoluble matters
D. None of the above
Answer» C. insoluble matters
Discussion
79.

The freezing point of fresh water is _______.

A. 4 C
B. 3 C
C. 5 C
D. 0 C
Answer» E.
Discussion
80.

Green house effect is the heating up of the Earth s atmosphere which is due to

A. the ultraviolet rays
B. g-rays
C. the infra-red rays
D. X-rays
Answer» D. X-rays
Discussion
81.

When two semiconductors of pand n-type are brought in contact, they form p-n junction which acts like a/an

A. Conductor
B. Oscillator
C. Rectifier
D. Amplifier
Answer» D. Amplifier
Discussion
82.

Sensitivity of the human eye is maximum in the

A. Violet region
B. Green region
C. Blue region
D. Red region
Answer» C. Blue region
Discussion
83.

Which one of the following is responsible for the working of Newton s colour disc experiment ?

A. Formation of pure spectra
B. Formation of impure spectra
C. Persistence of vision
D. Principle of complementary colour
Answer» D. Principle of complementary colour
Discussion
84.

Persons suffering from myopia are advised to use

A. convex lens
B. concave lens
C. plano-convex lens
D. plano-concave lens
Answer» C. plano-convex lens
Discussion
85.

Electro-static precipitator is used to control

A. Chemical Pollutants
B. Radio-active Pollutants
C. Water Pollutants
D. Air Pollutants
Answer» E.
Discussion
86.

Which of the following properties is generally found in nonmetals?

A. Brittleness
B. Conductivity
C. Ductility
D. Malleability
Answer» B. Conductivity
Discussion
87.

The water from a hand pump is warm in winter because

A. Our body is cold in winter and the water appears to be warm
B. The temperature inside the earth is higher than the atmospheric temperature
C. The pumping process causes friction which warms up the water
D. Inside water comes out and absorbs heat from the environment
Answer» C. The pumping process causes friction which warms up the water
Discussion
88.

A black body can absorb radiations of ;

A. lower wavelengths only
B. intermediate wavelengths only
C. higher wavelengths only
D. all wavelengths
Answer» E.
Discussion
89.

These waves cannot be transmitted through vacuum

A. Light
B. Sound
C. Heat
D. Electromagnetic
Answer» C. Heat
Discussion
90.

The audio signals of TV are :

A. Amplitude modulated
B. Frequency modulated
C. Unmodulated
D. Velocity modulated
Answer» C. Unmodulated
Discussion
91.

Speed of sound in air is unaffected by change in :

A. Pressure
B. Humidity
C. Temperature
D. Volume
Answer» B. Humidity
Discussion
92.

Hypermetropia or longsight can be corrected by using :

A. Bifocal lenses
B. Cylindrical lenses
C. Concave lenses
D. Convex lenses
Answer» E.
Discussion
93.

Parabolic mirros are used in

A. Car headlights
B. Driving mirrors
C. Dentists mirros
D. Shaving mirros
Answer» B. Driving mirrors
Discussion
94.

The important unit of a microprocessor is

A. ALU
B. array of registers
C. control unit
D. All of the above
Answer» E.
Discussion
95.

Why do brids not have respiratory trouble at the time of flying at high altitude ?

A. Their lungs are very large
B. They fly inactively
C. They have extra air sacs
D. They use less oxygen
Answer» D. They use less oxygen
Discussion
96.

The minimum number of geostationary satellites needed for uninterrupted global coverage is :

A. 3
B. 2
C. 4
D. 1
Answer» C. 4
Discussion
97.

Conversion of heat into electrical er is achieved by using :

A. Ammeter
B. Hydrometer
C. Voltmeter
D. Thermocouple
Answer» E.
Discussion
98.

The part of the eye having the larges refractive index is :

A. cornea
B. aqueous humor
C. lens
D. vitreous humor
Answer» D. vitreous humor
Discussion
99.

Kilowatt -hour is the unit of :

A. Energy
B. Power
C. Force
D. Momentum
Answer» B. Power
Discussion
100.

The height of a geo-stationary satellite from the Earth s surface is approximately :

A. 36,000 km
B. 42,000 km
C. 30,000 km
D. None of these
Answer» B. 42,000 km
Discussion