Q.
A constant torque acting on a uniform circular wheel changes its angular momentum from A0to 4A0 in 4 seconds. The magnitude of this torque is-
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a
3A0/4
b
A0
c
4A0
d
12A0
answer is A.
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Detailed Solution
(A) ΔJ=4A0−A0=3A0 and ΔT=4∴τ=ΔJΔT=3A04
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