Final answer:
When more force is applied through gear A, torque is created, causing gear B's angular velocity to change. It increases in magnitude.
Step-by-step explanation:
When more force is applied through gear A, torque is created, causing gear B to experience a change in angular velocity. The direction of rotation of gear B remains the same as before, but the magnitude of its angular velocity changes.
In this case, since gear A turns clockwise, gear B turns counterclockwise. When more force is applied through gear A, gear B experiences an increase in magnitude of its angular velocity. This means that gear B rotates faster.
Therefore, the correct answer is a. It increases in magnitude.