Question

The equation of a progressive wave can be given by $y=15\sin (660\pi t-0.02\pi x)cm$. The frequency of the wave is :

• A. $330Hz$
• B. $342Hz$
• C. $365Hz$
• D. $660Hz$

Answer 1

The correct option is A $330Hz$

$y=15$ sin $(660\pi t-0.02\pi x)$
The general equation of a progressive wave is

$y(x,t)=A\sin (\omega t-kx)$

$\omega =2\pi \nu$

$\nu =\frac{660\pi }{2\pi }$

=330 Hz