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A uniform rod of length L pivoted at one...

A uniform rod of length L pivoted at one end P is freely rotated in a horizontal plane with an angular velocity `omega` about a vertical axis passing through P. If the temperature of the system is increased by `Delta T`, angular velocity becomes `omega/2`. If coefficient of linear expansion of the rod is `alpha (altlt1)`, then `DeltaT` will be

A

`1/alpha`

B

`1/(2alpha)`

C

`1/(4alpha)`

D

`alpha`

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