Q. 7

A sound wave is passing through air column in the form of compression and rarefaction. In consecutive compressions and rarefactions,
A. Density remains constant.

B. Boyle’s law is obeyed.

C. Bulk modulus of air oscillates.

D. There is no transfer of heat.

Answer :

A sound wave always propagates in column by compression and rarefaction. The time taken in compression and rarefaction is very small and we can assume it as adiabatic process, hence no transfer of heat occurs.

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