Correct option is D
SCR (Silicon Controlled Rectifier):
A diode connected between the gate and cathode of an SCR (silicon controlled rectifier) protects the junction against reverse gate voltage.
Explanation:
· A diode is a two-terminal electronic component that conducts current primarily in one direction.
· A Zener diode connected across the gate circuit of an SCR protects the device from overvoltage.
· A resistor connected in series with the gate circuit protects the device from overcurrent.
· A voltage clamping device, such as a varistor, can also be used to reduce the effect of overvoltage.
· SCRs are commonly used in AC power control applications.
