Semiconductors Question 7
Question 7 - 2024 (30 Jan Shift 1)
A Zener diode of breakdown voltage $10 V$ is used as a voltage regulator as shown in the figure. The current through the Zener diode is
(1) $50 mA$
(2) 0
(3) $30 mA$
(4) $20 mA$
Show Answer
Answer: (3)
Solution:
Zener is in breakdown region.
$I _3=\frac{10}{500}=\frac{1}{50}$
$I _1=\frac{10}{200}=\frac{1}{20}$
$I _2=I _1-I _3$
$I _2=\left(\frac{1}{20}-\frac{1}{50}\right)=\left(\frac{3}{100}\right)=30 mA$
