A simple instrument used to produce pure sound of fixed frequency is-

A tuning fork

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Fire tongs

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Simple pendulum

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Metre scale

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Solution

The correct option is A A tuning fork
A tuning fork is the instrument used to produce sound of a certain fixed frequency. A tuning fork is a sound resonator which is a two-pronged fork.

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A simple instrument used to produce pure sound of fixed frequency is-

The correct option is A A tuning forkA tuning fork is the instrument used to produce sound of a certain fixed frequency. A tuning fork is a sound resonator which is a two-pronged fork.

The correct option is A A tuning fork
A tuning fork is the instrument used to produce sound of a certain fixed frequency. A tuning fork is a sound resonator which is a two-pronged fork.