Question

If at a place the speed of a sound wave of frequency $300Hz$ is $V$, the speed of another wave frequency $150Hz$ at the same place will be:

• A. $V$
• B. $V/2$
• C. $2V$
• D. $4V$

Answer 1

The correct option is A $V$

Since, medium does not change$,$ the temperature of the medium does not change$,$ pressure does not change, the velocity of sound should remain unchanged and will remain V$.$

When frequency of the sound wave changes from $300Hz$ to $150Hz,$

The wavelength of the sound wave will double from it's original value when frequency was $300Hz,$ and velocity of sound shall be still $V$ as before$.$

Hence,

option $V$ is correct answer.