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In a torsional pendulum, the twisted wire exerts a restoring torque on the body...but how is this possible as the wire lies on the axis of rotation..so torque exerted by it should be zero right?

In a torsional pendulum, the twisted wire exerts a restoring torque on the body...but how is this possible as the wire lies on the axis of rotation..so torque exerted by it should be zero right?

Grade:11

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