Physics - Questions and Answers, General Study (GK)

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211.

The waves used for a communication through artificial satellite are

(a)radio waves in the FM band

(b)radio waves in the AM band

(c)microwaves

(d)none of these

Comment

Answer is: CNA

212.

Velocity of electromagnetic waves in a medium depends upon

(a)mechanical and electrical properties of medium

(b)electrical and magnetic properties of medium

(c)thermal properties of medium

(d)none of these

Comment

Answer is: BNA

213.

Speed of sound in a gas is proportional to

(a)square root of adiabatic elasticity

(b)isothermal elasticity

(c)square root of isothermal elasticity

(d)adiabatic elasticity

Comment

Answer is: ANA

214.

Red shifts is an illustration of

(a)high frequency absorption

(b)low temperature emission

(c)Doppler effect

(d)unknown phenomenon

Comment

Answer is: CNA

215.

Ultrasonic waves are used for stirring liquid solutions because they

(a)can produce perfectly homogeneous solutions

(b)do not produce chemical reactions in the solution

(c)are easy to produce

(d)do not produce noise during the operation

Comment

Answer is: ANA

216.

Sound waves in air are ………waves.

(a)radio

(b)transverse

(c)longitudinal

(d)electromagnetic

Comment

Answer is: CNA

217.

Sound waves of wavelength greater than that of audible sound are called

(a)ultrasonic waves

(b)infrasonic waves

(c)sonic waves

(d)seismic waves

Comment

Answer is: BNA

218.

In vacuum, the speed of light

(a)depends on its wavelength

(b)depends on its frequency

(c)depends on its intensity

(d)Not depend on anyone

Comment

Answer is: DNA

219.

The temperature of boiling water, steam engine may be high because

(a)there are dissolved substances in water

(b)there is low pressure inside the boiler

(c)there is high pressure inside the boiler

(d)the fire is at very high temperature

Comment

Answer is: CNA

220.

The energy that can harness heat stored below the earth's surface is known as

(a)thermal energy

(b)tidal energy

(c)nuclear energy

(d)geo-thermal energy

Comment

Answer is: DNA

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Physics - Questions and AnswersPage 22

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