Question

If compression strikes on ear drum, it
A)moves inwards
B)moves outwards
C)remains same
D)both a & b

Answer 1

Answer:

If compression strikes on ear drum, it moves inwards (option A)

Explanation:

Sound waves consist of compressions and rarefactions. When the compression strikes the ear drum, the pressure on the outside of ear drum increases and pushes the ear drum inwards. And when rarefaction strikes the ear drum, the pressure on the outside of ear drum decreases and it moves outwards. Thus, when sound waves fall on the ear drum, it vibrates back and forth rapidly.

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