ICSE Class 10 Physics 2022 Paper

The diagram below shows a vibrating tuning fork $E$ mounted on a sound box $X$ . When the vibrating tuning forks A, B, C and D are placed on the sound box ${Y}$ one by one, it is observed that a louder sound is produced when the tuning fork B is placed on ${Y}$ .

Question : 34 of 45

Marks: +1, -0

What is the frequency of tuning fork E?

Solution:

The frequency of tuning fork

E

will be equal to the frequency of tuning fork

B

i.e.,

320\,\text{Hz}

. The reason is tuning forks

E

and

B

will be in resonance with each other as a louder sound is produced when the tuning fork B is placed on

Y

. In resonance the frequency of the external applied periodic force is equal to the frequency of the body made to vibrate.

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