Physics - Questions and Answers, General Study (GK)

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221.

The wavelength of the radiation emitted by a body depends upon

(a)the temperature of the surface

(b)the area of the surface

(c)the nature of the surface

(d)All of the above factors

Comment

Answer is: CNA

222.

At upper atmosphere, an astronaut feels

(a)extremely hot

(b)slightly hotter

(c)extremely cool

(d)slightly cooler

Comment

Answer is: CNA

223.

Which colour of heat radiation represents the highest temperature?

(a)Bloom red

(b)Dark cherry

(c)Salmon

(d)White

Comment

Answer is: DNA

224.

Which of the following is the best conductor of the heat?

(a)Mercury

(b)Silver

(c)Leather

(d)Benzene

Comment

Answer is: BNA

225.

What is the principle by which a cooling system in a motor car works?

(a)Convection

(b)Conduction only

(c)Radiation only

(d)Both conduction and radiation

Comment

Answer is: ANA

226.

The cloud float in the atmosphere because of their low

(a)velocity

(b)temperature

(c)density

(d)pressure

Comment

Answer is: CNA

227.

White clothes are cooler than black ones because they

(a)absorb all the light that reaches them

(b)reflect all the light that reaches them

(c)will not allow the light to penetrate

(d)cool the sun light completely

Comment

Answer is: BNA

228.

The change of a solid into vapor directly is called

(a)vaporization

(b)freezing

(c)melting

(d)sublimation

Comment

Answer is: DNA

229.

When water is heated from 0°C to 10°C, its volume

(a)increases

(b)decreases

(c)does not change

(d)first decreases and then increases

Comment

Answer is: DNA

230.

Metal tea pots have wooden handles because

(a)wood is a bad conductor of heat

(b)it prevents electric shock

(c)it gives beauty to the pots

(d)it is hygienic

Comment

Answer is: ANA

Comments

Good job mann.

Electric Shaver On 24.07.2018. 02:46

Physics - Questions and AnswersPage 23

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