Ncert Exercises & Solutions

What happens during the regulation action of a Zener diode?

1.	the current and voltage across the Zener remain fixed.
2.	the current through the series Resistance (R_s) changes.
3.	the Zener resistance is constant.
4.	the resistance offered by the Zener changes.

Choose the correct option:

1.	(a, b)
2.	(b, d)
3.	(b, c)
4.	(c, d)

(2) Hint: The resistance offered by the Zener changes due to the change in current.

During the regulation action of a Zener diode, the current through the R_s changes and resistance offered by the Zener changes. The current through the Zener changes but the voltage across the Zener remains constant.

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