Question

ws7306 - ab10uen - e1 - fet speed control circuits and switching power supplies

1. speed control circuits control the speed of a dc motor by changing the duty cycle of a pwm signal.

• a pwm
• b. ddm
• c fet
• d. rmg

Explanation:

PWM (Pulse - Width Modulation) speed control circuits change the duty cycle of a PWM signal to control the speed of a DC motor. DDM (Direct Drive Motor) is a type of motor, not a speed - control method. FET (Field - Effect Transistor) is a semiconductor device, not a speed - control circuit type. RMG is not a standard term related to this speed - control context.

Answer:

A. PWM