Physics - Questions and Answers, General Study (GK)

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161.

With the propagation of a longitudinal wave through a material medium, the quantities transferred in the direction of propagation are

(a)energy and momentum

(b)energy, momentum and mass

(c)energy and mass

(d)energy

Comment

Answer is: ANA

162.

Sound wave cannot pass through above

(a)a solid-liquid mixture

(b)an ideal gas

(c)a liquid gas mixture

(d)a perfect vacuum

Comment

Answer is: DNA

163.

Which one of the following statements is not correct?

(a)The velocity of sound in air independent of pressure

(b)The velocity of sound in air increases with increase of temperature

(c)The velocity of sound in air decreases as the humidity increases

(d)The velocity of sound in air is not affected by the change in amplitude and frequency

Comment

Answer is: CNA

164.

Ultrasonic waves are produced by

(a)Peltier's effect

(b)Piezoelectric effect

(c)Doppler's effect

(d)Coulomb's law

Comment

Answer is: BNA

165.

With the increase in temperature, the frequency of the sound from an organ pipe

(a)increases

(b)decreases

(c)remain unchanged

(d)changes erractically

Comment

Answer is: CNA

166.

The ratio of the speed of X-rays to that of gamma rays is

(a)<1

(b)>1

(d)depends upon the ratio of their frequencies

Comment

Answer is: CNA

167.

Electromagnetic waves are produced by

(a)charge less particle

(b)a static charge

(c)a moving charge

(d)an acceleration charge

Comment

Answer is: DNA

168.

The ozone layer absorbs radiation of wavelength

(a)less than 3 x 10^-5 m

(b)more than 3 x 10^-7 m

(c)more than 3 x 10^-5 m

(d)less than 3 x 10^-7 m

Comment

Answer is: DNA

169.

Which one of the following has highest frequency?

(a)Cosmic rays

(b)X-rays

(c)Radio waves

(d)Microwaves

Comment

Answer is: ANA

170.

Which of the following electromagnetic waves has the longest wavelength?

(a)Gamma rays

(b)infrared rays

(c)Light rays

(d)Ultraviolet rays

Comment

Answer is: BNA

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Physics - Questions and AnswersPage 17

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