What happens during regulation action of a Zener diode?

Question:

What happens during regulation action of a Zener diode?

(a) The current in and voltage across the Zenor remains fixed

(b) The current through the series Resistance (Rs ) changes

(c) The Zener resistance is constant

(d) The resistance offered by the Zener changes.

Solution:

(b) The current through the series Resistance (Rs ) changes

(d) The resistance offered by the Zener changes.

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