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Physics - Sound Wave Question with Solution | TestHub

PhysicsSound WaveWavesMedium2 minQB

PhysicsMediummultiple choice

A driver in a stationary car blows a horn which produces monochromatic sound waves of frequency 1000 Hz normally towards a reflecting wall. The wall approaches the car with a speed of 3.3 m/s (speed of sound 330 m/s):

Options:(select one or more)

Answer:

A, C

Solution:

The wall receives $1000 \times \frac{330 + 3.3}{330} = 1010$ Hz and acts as a source moving toward the driver: $f = 1010 \times \frac{330}{330 - 3.3} \approx 1020$ Hz, an increase of about 2%.

Stream:JEESubject:PhysicsTopic:Sound WaveSubtopic:Waves

⏱ 2mℹ️ Source: QB

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