Question

A wave completes 24 cycles in 0.8 s. The time period of the wave is

• A. 1/30 s
• B. 20 s
• C. 1/24 s
• D. none of these

Answer 1

The correct option is A 1/30 s

time period of wave $T=\frac{0.8}{24}sec$

so frequency is $f=\frac{24}{0.8}=30$Hz

so time period is $T=\frac{1}{30}$s

so answer is A.