Doubt from sound waves

Que 3

Getting b??


Error method never bring exact result but some time it saves a lot of time

Thanks bro😀

So what you basically did is you knew the formula relating frequency and tension
By knowing change in tension you calculated change in frequency
So can this (error method ) be applied anywhere where we want to know change in a particular quantity when we have the relation the relates the unknown change with the changes given in the question

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Yes error method can be applied anywhere when there is not a very large change is mentioned but since it a approximation method , it never bring exact result . So be careful while applying in numerical based question and when option are very close to each other.

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Ok thnx