Physics - Questions and Answers, General Study (GK)

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201.

When light waves pass from air to glass the variables affected are

(a)wavelength, frequency and velocity

(b)velocity and frequency

(c)wavelength and frequency

(d)wavelength and velocity

Comment

Answer is: DNA

202.

Sound waves do not exhibit the phenomenon of

(a)refraction

(b)interference

(c)polarization

(d)diffraction

Comment

Answer is: CNA

203.

The Doppler's effect is applicable for

(a)light wave

(b)space wave

(c)sound wave

(d)All of these

Comment

Answer is: DNA

204.

When a wave goes from one level to another, there is a change in the
1. Frequency
2. Velocity
3. Amplitude
4. Wavelength
Choose the correct answer.

(a)1, 2 and 3

(b)2, 3 and 4

(d)1, 2, 3 and 4

Comment

Answer is: BNA

205.

The velocity of sound is generally greater in solids than in gases because

(a)the density of solids is low and the elasticity is high

(b)the elasticity of solids is very high

(c)the density of solids is high and the elasticity is low

(d)both the density and elasticity of solids are very low

Comment

Answer is: BNA

206.

Mechanical waves

(a)are longitudinal only

(b)are transverse only

(c)can be both longitudinal and transverse

(d)none of these

Comment

Answer is: CNA

207.

The velocity of sound in air is affected by change in the
1. moisture content of air
2. temperature of air
3. composition of air
4. atmospheric pressure
Choose the correct answer.

(a)1, 2 and 3

(b)2, 3 and 4

(d)1, 3 and 4

Comment

Answer is: BNA

208.

The velocity of sound produced by a vibrating body varies

(a)inversely as the frequency of the medium

(b)inversely as the density of the medium

(c)directly as the square root of density

(d)directly as the square root of frequency of the medium

Comment

Answer is: BNA

209.

X-rays absorption will be maximum for the sheets of

(a)copper

(b)iron

(c)silver

(d)lead

Comment

Answer is: DNA

210.

Structure of solids is investigated by using

(a)Gamma rays

(b)X-rays

(c)cosmic rays

(d)infrared radiation

Comment

Answer is: BNA

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Physics - Questions and AnswersPage 21

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