Physics quiz For UPSC | SSC | Rail | RRB | State PSC | class 10 icse P27

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Page 27

80050261. Newton's first law of motion gives the concept of

A

energy

B

work

C

momentum

D

inertia

D

Correct Answer: D. inertia

80047262. Longitudinal waves cannot travel through

A

Vacuum

B

Solid

C

Liquid

D

Gas

A

Correct Answer: A. Vacuum

80130263. Which of the following is used for regulated electric supply?

A

Zener diode

B

Junction diode

C

Gun diode

D

Tunnel diode

A

Correct Answer: A. Zener diode

80007264. A gas thermometer is more sensitive than a liquid thermometer because a gas:

A

is lighter than liquid

B

expands more than a liquid

C

is easy to obtain

D

does not change state easily

D

Correct Answer: D. does not change state easily

80008265. A hydrogen balloon floats up because of

A

air pressure decreases with a decrease in height

B

air pressure decreases with decrease in weight

C

weight of the balloon is less than the weight of air displaced by it.

D

the pressure, inside the balloon is more than the pressure outside it

C

Correct Answer: C. weight of the balloon is less than the weight of air displaced by it.

80062266. Surface tension in a liquid is due to

A

Adhesive force between molecules

B

Cohesive force between molecules

C

Gravitational force between molecules

D

Electrical force between molecules

B

Correct Answer: B. Cohesive force between molecules

80118267. When the speed of the car is doubled, then what will be the braking force of the car to stop it in the same distance

A

four times

B

two times

C

half

D

one-fourth

A

Correct Answer: A. four times

80077268. The instrument used to measure the force and velocity of the wind is

A

Ammeter

B

Anemometer

C

Altimeter

D

Audiometer

B

Correct Answer: B. Anemometer

80148269. Why are we able to hear short wave broadcasts better than longwave broadcasts?

A

Short waves are more energetic than long waves.

B

Short waves are unaffected by atmospheric disturbances.

C

Short wave broadcasts are made by nearby radio stations.

D

By convention, short waves are meant for long distances, whereas long waves are reserved for short distances.

A

Correct Answer: A. Short waves are more energetic than long waves.

80124270. Which combination of colors are the most convenient during day and night time

A

Orange and blue

B

White and black

C

Yellow and blue

D

Red and green

D

Correct Answer: D. Red and green

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