hs Physics mcq questions For UPSC | SSC | Rail | RRB | State PSC P32

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Page 32

80067311. The different colors of different stars are due to the variation of

A

temperature

B

pressure

C

density

D

radiation from them

A

Correct Answer: A. temperature

80023312. Danger signals are generally red as red light

A

is least bright

B

undergoes least. deviation

C

has the lowest velocity

D

gives comfort to the eye

B

Correct Answer: B. undergoes least. deviation

80087313. The snow on the mountains does NOT melt all at once when it is heated by the sun because:

A

it becomes very hard

B

it reflects most of the heat from the sun

C

it has a low specific heat capacity

D

it has a high latent heat of fusion

B

Correct Answer: B. it reflects most of the heat from the sun

80081314. The mass-energy relation is the outcome of

A

quantum theory

B

general theory of relativity

C

field theory of energy

D

special theory of relativity

D

Correct Answer: D. special theory of relativity

80103315. What is the color of light related to?

A

Amplitude

B

Frequency

C

Quality

D

Velocity

A

Correct Answer: A. Amplitude

80125316. Which of the following are used for accurately measuring very small time intervals?

A

Pulsars

B

Quartz clocks

C

Atomic clocks

D

White dwarfs

C

Correct Answer: C. Atomic clocks

80085317. The sensation of weightlessness in a spacecraft in an orbit is due to the

A

absence of gravity outside

B

acceleration in the orbit which is equal to the acceleration due to gravity outside

C

the presence of gravity outside but not inside the spacecraft

D

fact that spacecraft in the orbit has no energy

B

Correct Answer: B. acceleration in the orbit which is equal to the acceleration due to gravity outside

80146318. Who defined the law of gravitation?

A

Newton

B

Archimedes

C

Galileo

D

Faraday

A

Correct Answer: A. Newton

80134319. Which of the following metals is used for the manufacture of heating elements provided in electric iron ?

A

Nickel

B

Chromium

C

Nichrome

D

Tungsten

C

Correct Answer: C. Nichrome

80010320. A particle dropped from the top of a tower uniformly falls, on the ground at a distance that is equal to the height of the tower. Which of the following paths will be traversed by the particle?

A

Circle

B

Parabolic

C

Great circle

D

Hyper-parabolic

B

Correct Answer: B. Parabolic

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