Q. Time period of a wave is $5 \times 10^{- 3}$s, what is the frequency?
A) $5 \times 10^{- 3}s^{- 1}$
B) $2 \times 10^{2}s^{- 1}$
C) $23 \times 10^{3}s^{- 1}$
D) $5 \times 10^{2}s^{- 1}$
Explanation
(b)
$Frequency\ (n) = \frac{1}{time\ period\ (T)}$
$Here,\ \ \ \ \ \ \ \ \ \ \ \ \ \ T = 5 \times 10^{- 3}s$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ n = \frac{1}{5 \times 10^{- 3}} = 0.2 \times 10^{3} = 2 \times 10^{2}s^{- 1}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.