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Physics mcq questions and answers for competitive exams

Ramya_naidu

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Physics mcq questions and answers for competitive exams UPSC SSC , SSC CGL, SSC CHSL, upsc Civils , Entrance exams Online test practice online free Quiz, mock practice online
76.
Radiocarbon is produced in the atmosphere as a result of

a
lightning discharge in atmosphere
b
action of ultraviolet light from the sun on atmospheric oxygen
c
collision between fast neutrons and nitrogen nuclei present in the atmosphere
d
action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere
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77.
Large astronomical telescopes always use as objective

a
lens
b
mirror
c
combinations of lenses
d
None of the above
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78.
Superconductors are substances which

a
conduct electricity at low temperature
b
conduct electricity at high temperatures
c
offer high resistance to the flow of current
d
offer no resistance to the flow of electricity
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79.
In which among the following is alternating current not used?

a
Refrigeration
b
Electroplating
c
Radio detection
d
Heat production
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80.
Gas law was given by

a
Boyle
b
Ostwald
c
Faraday
d
Arrhenius
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81.
The form of matter are

a
1
b
2
c
3
d
4
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82.
Who discovered X-Rays?

a
Einstein
b
Roentgen
c
Madam Curie
d
J. J. Thomson
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83.
At what temperature will the density of water be maximum?

a
0◦C
b
4◦C
c
- 4◦C
d
32◦C
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84.
Which among the following is the surface to surface missile that is made in India?

a
Naag
b
Dharti
c
Akash
d
Prithivi
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85.
Identify the vector quantity from the following

a
Time
b
Heat
c
Work
d
Angular momentum
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86.
Of the following properties of a wave, the one that is independent of the other is its

a
velocity
b
amplitude
c
frequency
d
wavelength
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87.
Supersonic plane fly with the speed

a
of light
b
of sound
c
less than the speed of sound
d
greater than the speed of sound
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88.
Materials for rain-proof coats and tents owe their water-proof properties to

a
elasticity
b
viscosity
c
specific gravity
d
surface tension
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89.
Energy posses by a body in motion is called

a
Potential Energy
b
Kinetic Energy
c
Both of Above
d
None of Above
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90.
One should not connect a number of electrical appliances to the same power socket because

a
the appliance will not get full voltage
b
this can damage the electrical meter
c
this can damage the appliances due to overloading
d
this can damage the domestic wiring due to overloading
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