A Zener diode having break down voltage V Z=6 mathrm~V is used in a voltage regulator circuit as shown in the figure. The minimum current required to pass through the Zener to act as a voltage regulator is 10 mathrm~mA and maximum allowed current through Zener is 40 mathrm~mA. The maximum value of RS for Zener to act as a voltage regulator is

Question

A Zener diode having break down voltage V Z=6 mathrm~V is used in a voltage regulator circuit as shown in the figure. The minimum current required to pass through the Zener to act as a voltage regulator is 10 mathrm~mA and maximum allowed current through Zener is 40 mathrm~mA. The maximum value of RS for Zener to act as a voltage regulator is<img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/c8842c5bd8af77412f5be528b7d7c63e-.png" /> (A) 100 Ω (B) 400 Ω (C) 0.4 Ω (D) 950 Ω

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/875ec390b04aecb3de5d33966ee12434-.png" /> Minimum current =10 mA(IL=0) RS=(V/I)=(4 V/10 mA)=400 Ω

100 \Omega

400 \Omega

0.4 \Omega

950 \Omega

Minimum current $= 10 m A (I_{L} = 0) R_{S} = \frac{V}{I} = \frac{4 V}{10 m A} = 400 Ω$

100 \Omega

400 \Omega

0.4 \Omega

950 \Omega

Minimum current =10mA(IL​=0)RS​=IV​=10mA4V​=400Ω

Minimum current $= 10 m A (I_{L} = 0) R_{S} = \frac{V}{I} = \frac{4 V}{10 m A} = 400 Ω$