Question

1. What is frequmcy of sound wave
who time
heriod is 0.05.​

Answer 1

★Given:-

• Time period of a sound wave = 0.05s.

★To find:-

• Frequency.

★Solution:-

We know,

$\leadsto \underline{\boxed{\sf Frequency =\frac{1}{Time\ period} }}$

Hence,

$\mapsto \sf Frequency = \frac{1}{T} \\\\\mapsto \sf F = \dfrac{1}{0.05} \\\\\\\mapsto \sf F=\dfrac{100}{5} \\\\\\\mapsto \underline{\boxed{\sf Frequency = 20Hz.}}$

Therefore,

The frequency of the sound wave is 20Hz.

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Know more:-

Time period:

• Overall time taken for one complete cycle of vibration to pass a certain point is known as time period (T).

Frequency:

• The no of waves that pass through a certain fixed point in unit time is known as frequency.

→With the increase in the time period, the frequency of the wave decreases.

→Sound wave is a longitudinal wave.

______________

Answer 2

Given :-

• Time period of a sound wave = 0.05s.

To find :-

• Frequency.

Solution :-

We know that,

☆ $\boxed{\sf\underline{Frequancy \: = \: \frac{1}{Time \: Period}}}$

Hence,

${\sf{~~~~~~~~Frequancy = \frac{1}{t} }}$

${\sf{~~~~~~~~~~~Frequancy = \frac{1}{0.05}}}$

${\sf{~~~~~~~~~~~~~Frequancy = \frac{100}{5}}}$

☆ $\boxed{\sf\underline{Frequancy = 20Hz}}$

Therefore,

The frequency of sound waves is 20Hz.

________________

Know more,

Time period :-

• Overall time taken for one complete cycle of vibration to pàss a certain point is know as time period (T).

Frequency :-

• The no of the waves that pàss through a certain fixed point in unit time is know as frequency.

● With the increas in the time period, the frequency of the wave decreses.

● Sound wave is a longitudinal wave.