Question

Stationary wave is represented by $Y=A\sin \left(100t\right)\cos \left(0.01x\right)$ where $y$ and $A$ are in $mm$, $t$ in sec and $x$ in $m$. The velocity of the wave:

• A. $1m/s$
• B. ${10}^{2}m/s$
• C. ${10}^{4}m/s$
• D. Zero

Answer 1

The correct option is C ${10}^{4}m/s$

Velocity of wave $v=\text{coefficient of t/coefficient of x}=100/.01={10}^{4}m/s$

Option c is correct.