Question

What is the frequency of oscillation if the time period is 20ms?

Answer 1

Given:

Time period of oscillations = 20 ms.

To find:

Frequency of oscillations ?

Calculation:

• Frequency is defined as the number of full oscillations completed in one second.

• In other words, frequency is the reciprocal of time period.

$\therefore \: f = \dfrac{1}{T}$

$\implies \: f = \dfrac{1}{20 \: ms}$

$\implies \: f = \dfrac{1}{20 \times {10}^{ - 3} \: s}$

$\implies \: f = 50 \: hz$

So, frequency of oscillations is 50 Hz .

Answer 2

Given:

Time period of oscillations = 20 ms.

To find:

Frequency of oscillations ?

Calculation:

• Frequency is defined as the number of full oscillations completed in one second.
• In other words, frequency is the reciprocal of time period.

$f = \frac{1}{t}$

$= > f = \frac{1}{20ms}$

$= > f = \frac{1}{20 \times 10 {}^{ - 3} } s$

$= > f = 50hz$