Newton's Second Law in Rotational Form Practice Test

A flywheel about a fixed axle has a constant net torque $\tau$ clockwise, producing clockwise angular acceleration $\alpha$. If the flywheel’s rotational inertia is increased by a factor of $5$ while keeping the same $\alpha$, what must happen to $\tau$?

A solid cylinder rotates about its central axis. A constant net torque is applied clockwise, and the angular acceleration is clockwise. The cylinder is replaced by a different object that has smaller rotational inertia about the same axis, while the net torque is unchanged. What happens to $\alpha$?