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
151.
Radio telescopes are better than optical telescopes because

a
they can detect faint galaxies which no optical telescope can
b
they can work even in cloudy conditions
c
they can work during the day and night
d
All of the above

152.
Sound produced at a point is heard by a person after 5 second, while the same sound is heard by another person after 6 seconds. If the speed of sound is 300 m/s, what could be the maximum and minimum

a
1.8 km, 0.15 km
b
2.2 km, 0.20 km
c
2.8 km, 0.25 km
d
3.3 km, 0.30 km

153.
Orbital speed of a satellite is dependent of its mass.

a
True
b
False
c
May be
d
Not sured

154.
The absorption of ink by blotting paper involves

a
diffusion of ink through the blotting
b
capillary action phenomenon
c
viscosity of ink
d
siphon action

155.
What is the relation between wavelength, frequency and velocity?

a
velocity of wave = wavelength/frequency
b
velocity of wave = frequency/wavelength
c
velocity of wave = frequency * wavelength
d
None of above

156.
Solar cell converts

a
Solar energy into electrical energy
b
Electrical energy into light energy
c
Sound energy into electrical energy
d
Electrical energy into mechanical energy

157.
At what temperature are the temperature on Celsius and Fahrenheit scales equal?

a
40◦Celsius
b
- 40◦Celsius
c
273◦Celsius
d
- 273◦Celsius

158.
Intensity of sound at a point is its distance from the source.

a
directly proportional to
b
inversely proportional to
c
directly proportional to square of
d
inversely proportional to square of

159.
The centre of the Newton's rings pattern is dark since

a
The glass plate plano-convex lens
b
The light undergoes a phase change P
c
The light undergoes a phase change 2 P
d
The light undergoes a phase change P/2

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