A constant torque acting on a uniform circular wheel changes its angular momentum from \( A_{0} ...

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A constant torque acting on a uniform circular wheel changes its angular momentum from \( A_{0} \) to \( 4 A_{0} \) in 4 seconds. The magnitude of this torque is
(1) \( \frac{3 A_{0}}{4} \)
(2) \( A_{0} \)
(3) \( 4 A_{0} \)
(4) \( 12 A_{0} \)
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