Question

In the given circuit the current through Zener Diode is close to:
(A) 0.0 mA (B) 6.7 mA
(C) 4.0 mA
(D) 6.0 mA

Answer 1

Answer:

In the given circuit the current through Zener Diode is close to:

Answer : (A) 0.0 mA

Explanation:

Zener diode -

It can operate continuously without being damaged in the region of reverse  biased

- wherein

1) It acts as voltage regulator

2) In forward biasing it act as ordinary diode .

Since voltage across zener must be less than 10 V , there for it will not work in break down region and its resistance is infinite and current through it is zero.

Mathematically,

Potential drop across R₂

V = iR

   = (12 / 1500 + 500) x 1500

   = 9V

9V is less 10V.

Hence the current through Zener Diode is close to (A) 0.0 mA