A metallic wire of length l is held betw...

A metallic wire of length `l` is held between two rigid supports. If the wire is cooled through a temperature t. (Y= Young's modulus of elasticity of wire, `rho=` density, `alpha=` thermal coefficient of linear expansion). Then the frequency of oscillation is proportional to

`1/l`

`sqrt(Y)`

`sqrt(alpha//rho)`

`sqrt(l)`

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