The shear stress at a point in a shaft subjected to a torque is

Directly proportional to the polar moment of inertia and to the distance of the point from the axis

Directly proportional to the applied torque and inversely proportional to the polar moment of inertia

Directly proportional to the applied torque and the polar moment of inertia

Inversely proportional to the applied torque and the polar moment of inertia

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