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A horizontally orientied unifrom copper ...

A horizontally orientied unifrom copper rod of length `l` is rotating about a vertical axis passing through its centre. Calculate the rotated frequency at which the rod ruptures. Breaking or rupture strength of copper is `sigma` and density of copper is `rho`.

A

`frac(1)(2pi) sqrt frac(8 sigma)(pl^2)`

B

`frac(1)(4pi) sqrt frac(3 sigma)(pl^2)`

C

`frac(1)(3pi) sqrt frac(2 sigma)(pl^2)`

D

None of these

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