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A metallic circular wheel is rotating ab...

A metallic circular wheel is rotating about its own axis without friction. If the radius of wheel expands by `0.2%`, percentage change in its angular velocity

A

increases by `0.1 %`

B

decreses by `0.1 %`

C

increases by `0.4%`

D

decreases by `0.4%`

Text Solution

Verified by Experts

The correct Answer is:
D
`Iomega=mr^(2)omega=constant`
`omega propr^(-2)` and `(Deltaomega)/(omega)=-2(Deltar)/r`
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