Assertion :The process of beat formation can be observed by taking two tuning forks of the same frequency and putting some wax on the prongs of one of the prongs. Reason: Loading with wax decreases the frequency of a tuning fork little.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Beats are formed when two waves of same amplitude but slightly different frequency interfere.
Beat frequency $b = | ν_{1} - ν_{2} |$
Since, earlier, the two tuning forks have same frequency. Thus no beats were formed.
Putting some wax on the prongs of one of the tuning fork will decrease its frequency a little bit. Now, there generates a frequency difference between the two forks and so beats are formed.
Hence option A is correct.

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