Question

The time period of a vibrating body is 0.02 s. What is the number of oscillations produced in 5 seconds?

• A. 50
• B. 200
• C. 250
• D. 500

Answer 1

The correct option is C 250

Frequency is given as the reciprocal of time period.

That is,

$Frequency,f=\frac{1}{Timeperiod}$

So for, Time period 0.02 s,

$f=\frac{1}{0.02}Hz=50Hz$
The number of oscillations per second is called the frequency of oscillation.

A frequency of 50 Hz is 50 oscillations per second. i.e. in 1 second, the number of oscillations is 50.

So, in 5 seconds the number of oscillations will be

$=50\times 5=250.$