A sound wave is passing through air column in the form of compression and rerefactions. In consecutive compressions and rerefactions.

Options

A. Density remains constant
B. Boyle's law is obeyed
C. Bulk modulus of air oscillates
D. There is no transfer of heat

Answer

D

Explanation

(a) Due to compression and rarefactions density of the medium (air) changes. At compressed regions density is maximum and at rarefactions density is minimum
(b) As density is changing, so Boyle’s law is not obeyed
(c) Bulk modulus remains same
(d) The time of compression and rarefaction is too small i.e., we can assume adiabatic process and hence no transfer of heat.