Q. A plane wave is described by the equation $y = 3\cos\left( \frac{x}{4} - 10t - \frac{\pi}{2} \right)$. The maximum velocity of the particles of the medium due to this wave is
A) 30
B) $\frac{3\pi}{2}$
C) $3/4$
D) 40
Explanation
(a) $v_{\max} = a\omega = 3 \times 10 = 30$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.