1.

A sound wave propagates in a medium of Bulk's modulus B by means of compressions and rarefactions. If P_(c) and P_(r) are the pressures at compression and rarefaction respectively,a be the wave amplitude and k be the angular wave number then

Answer»

`P_(c)` is maximum and `P_(r)` is minimum
`p_(c)` is minimum and `p(r)` is maximum
The pressure amplitude is Bak
If the displacement wave is `y = a SIN(omegat - kx)` which leads displacement wave by a phase angle of `(pi)/(2)`

SOLUTION :At points of compressure the pressure is more than that at RARE faction points hence OPTION (A)is correct. The pressure amplitude in the medium in sound wave is given by the expression mentioned in option (C) hence it is correct and at any pointthe VARIATION of preesure is ahead in phase compared to displacement variation by an angle `PI//2` hence option (D) is correct.


Discussion

No Comment Found

Related InterviewSolutions