1.

Voltage rating of a Zener diode denotes ____________(a) Reverse breakdown voltage(b) Forward breakdown voltage(c) Voltage at which current is maximum(d) Maximum forward voltage which a diode can withstandThe question was posed to me in an online interview.My doubt is from Voltage-Ampere Characteristics of Diode topic in chapter Diode Circuit of Analog Circuits

Answer»

Right choice is (a) Reverse breakdown VOLTAGE

To explain I would say: Voltage RATING of a zener diode indicates the voltage beyond which current increases rapidly. Beyond this point increase in reverse bias voltage will only REFLECT on current which means voltage drop beyond this point is ALMOST constant. This phenomenon holds the key role in the working of zener diode as a voltage REGULATOR.



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