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A constant torque acting on a uniform ci...

A constant torque acting on a uniform circular wheel changes its angluar momentum from `A_0` to `4 A_0` in `4 s`. The magnitude of this torque is equal to.

A

`(3A_0)/4`

B

`A_0`

C

`4A_0`

D

`12A_0`

Text Solution

Verified by Experts

The correct Answer is:
A
`tau=(DeltaL)/(Deltat)rArr(4A_0-A_0)/4=(3A_0)/4`
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