Physics mcq questions for pmt | SSC | Rail | RRB | State PSC P18

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Page 18

1505171. What kind of energy works when a watch spring is wound up?

A

Electrical energy

B

Magnetic energy

C

Kinetic energy

D

Potential energy

D

Correct Answer: D. Potential energy

1470172. The ink of pen leaks in an airplane because

A

High speed of the airplane

B

Temperature difference

C

Atmospheric pressure increases.

D

The pressure of ink inside is more than the outside pressure.

D

Correct Answer: D. The pressure of ink inside is more than the outside pressure.

1474173. When a ship enters the sea from a river, it floats up because

A

The density of the river water is greater

B

Saltwater of the sea is denser

C

Seawater is warmer

D

The speed of the ship on the sea is greater.

B

Correct Answer: B. Saltwater of the sea is denser

1555174. The principle underlying a microwave oven is

A

Microwaves are similar to thermal radiation.

B

Microwaves vibrate the water molecules in food thereby generating heat.

C

The heat generated by nuclear power

D

Not fully understood

B

Correct Answer: B. Microwaves vibrate the water molecules in food thereby generating heat.

80038175. If the velocity-time graph of a particle is represented by y = mt + c, then the particle is moving with

A

constant speed

B

constant velocity

C

constant acceleration

D

varying acceleration

C

Correct Answer: C. constant acceleration

80071176. The energy of Ultraviolet rays is great than

A

Infra-red rays

B

Gamma rays

C

X-rays

D

Cosmic rays

A

Correct Answer: A. Infra-red rays

80136177. Which of the following parts of the sunlight makes the solar cooker hot?

A

Ultra violet

B

Red light

C

Infra red

D

Cosmic rays

C

Correct Answer: C. Infra red

80126178. Which of the following has got more heat capacity?

A

Iron piece

B

Water

C

Gold piec

D

Benzene

B

Correct Answer: B. Water

80105179. What is the minimum escape velocity of a rocket to be launched into space?

A

5 Km/Sec.

B

6 Km/Sec.

C

11 Km/Sec.

D

15 Km/Sec.

C

Correct Answer: C. 11 Km/Sec.

80083180. The oldest type of energy known to man is

A

wind power

B

solar power

C

tidal energy

D

geothermal energy

D

Correct Answer: D. geothermal energy

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