Rankers Physics
Topic: Semiconductor Physics
Subtopic: P-N Junction Diode and its applications

A zener diode, having breakdown voltage equal to 15 V, is used in a voltage regulator circuit shown in figure. The current through the zener diode is: Image related to
5 mA
10 mA
15 mA
20 mA

Solution:

Voltage across 250 ohm resistor= 5 volt

Current through 250 ohm resistor= 5/250 = 20 mA

Current through 1000 ohm resistor = 15/1000 = 15mA

Current through Zener Diode = 20 mA -15 mA = 5 mA

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