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  4. A tuning fork produces waves in a medium. If the temperature of the medium change, one of the following will change:

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Q. A tuning fork produces waves in a medium. If the temperature of the medium change, one of the following will change:

EAMCETEAMCET 1998

Solution:

If temperature of medium changes the velocity changes, also from $ v=n\lambda $ thus, it is also true as $ v={{\left( \frac{E}{\rho } \right)}^{1/2}}. $ Both E and $ \rho $ decrease but decrease ofE is much larges. Frequency does not change on changing the temperature, hence wave length changes.