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When an aeroplane attains a speed higher...

When an aeroplane attains a speed higher than the velocity of sound in air, a loud bang is heard. This is because

A

It explodes

B

It produces a shock wave which is received as the bang

C

Its wings vibrate so violently that the bang is heard

D

The normal engine noises undergo a Doppler shift to generate the bang

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The correct Answer is:
B
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