As long as the voltage applied to the gate of the SCR is locked in phase with the voltage applied to the anode, the SCR cannot be fired after the AC voltage applied to the anode has reached ____°.
A) 15
B) 45
C) 90
D) 180

Question

Quizplus · Accepted Answer

The SCR cannot be fired after the AC voltage applied to the anode has reached 90° because at this point, the voltage starts to decrease, reducing the forward bias and thus the ability to turn on the SCR.

As Long as the Voltage Applied to the Gate of the SCR