Torque acting on a rotating body

Obtain an expression for torque acting on rotating body with constant angular acceleration.

If no torque acts on a rotating body and if its moment of inertia decreases the angular velocity omega of the body increases such a manner that

Explain the torque acting on a rigid body.

Obtain an expressing for torque acting on a body rotating with uniform angular acceleration.

Can you calculate the torque acting on a rigid body without specifying a centre of rotation ?

A torque of 50 Nm acts on a rotating body for 5 s. Its angular momentum is