Question

In the circuit given below, the Zener voltage is 6V, dynamic resistance of Zener is 10Ω and Zener current is negligible. If input voltage varies between 9V to 12V, the output voltage would

(1) always be 6V

(2) lie between 9V to12V

(3) equal 9V

(4) lie between 6.1875V to 6.375V

Answer 1

(4) lie between 6.1875V to 6.375V

The equivalent circuit diagram gives