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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

increase b `0.1 `%

B

decreases by `0.1` %

C

increase by `0.4` %

D

decrease by `0.4` %

Text Solution

Verified by Experts

The correct Answer is:
D
`mR^(2)omega `=constant
` omega prop 1/(R^(2))`
`(Deltar)/omega xx 100 = - 2 ((DeltaR)/R xx100)`
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