An SCR is used to control the speed of a dc motor by_______ the ________ of the pulse delivered to the motor.
A)decreasing, gate width
B)varying, width
C)increasing, amplitude
D)None of the above.

Question

Quizplus · Accepted Answer

Varying the width of the pulse delivered to the motor allows for control over the speed of a DC motor when using an SCR (Silicon Controlled Rectifier). This technique is known as pulse width modulation (PWM).

An SCR Is Used to Control the Speed of a Dc