Q. In a plane progressive wave given by $y = 25\cos{(2\pi t - \pi x)},$ the amplitude and frequency are respectively
A) 25,100
B) 25,1
C) 25,2
D) $50\pi,2$
Explanation
(b) Comparing the given equation with $y = a\cos{(\omega t - kx)}$
$a = 25,\ \omega = 2\pi n = 2\pi \Rightarrow n = 1Hz$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.