Home Physics Wave and Sound Mix A bus is moving with a velocity of 30 m/s to…
Physics Wave and Sound Mix MCQ (Single Correct)

A bus is moving with a velocity of 30 m/s towards a huge wall. The drive sounds a horn of frequency 120 Hz. If the speed of sound in air = 330 m/s. Select the correct option –

A
Frequency received by wall is 120 Hz
B
Frequency received by wall is 132 Hz
C
Frequency at reflected wave observed by the driver is 240 Hz
D
Frequency of reflected wave observed by the driver is 144 Hz

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The correct answer is:
CHECK THE SOLUTION

(b, d)
Speed of bus
= frequency of horn
frequency received by the wall

Frequency observed by the driver

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