Newton's Second Law in Rotational Form Practice Test

A rigid disk rotates about a fixed axis. The net torque is clockwise and constant, and the angular acceleration is clockwise. If both the net torque and rotational inertia are doubled, how does $\alpha$ change?

A rigid bar rotates about a frictionless pivot. A constant net torque acts clockwise, and the bar’s angular acceleration is clockwise. If the bar’s rotational inertia about the pivot is doubled while the net torque is unchanged, what is the new $\alpha$?