Question

Define frequency how are the S.I. units of frequency and time period related to each other find the frequency of the vibrating body if it completes 20 vibration in one second

Answer 1

Explanation:

Frequency is defined as number of vibrations/oscillations in a second of time.

Its SI unit is Hz(hertz).

Time period is defined as time taken for completion of 1 vibration.

Its SI unit is s(seconds).

Frequency = 1/ Timeperiod

According to definition,

Frequency = no.of vibrations in 1 second.

therefore, frequency = 20Hz.

Answer 2

frequency is defined as number of vibration in a second of time

S.l unit is Hz ( hertz)

time period is defined as the time taken for completion of one vibration

SI unit is S (second )

Frequency =

$\frac{1}{time \: \: period} \\ = \frac{1}{20} \\ = 20 \: \: \: hz \: ( \: hertz)$