# Q. For the circuit shown below, the current through the Zener diode is :

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Solution:

## Assuming zener diode doesnot undergo breakdown, current in circuit = $\frac{120}{15000} = 8mA$ $\therefore$ Voltage drop across diode = 80 V > 50 V. The diode undergo breakdown. Current is $R_1 = \frac{70}{5000} = 14 mA$ Current is $R_2 = \frac{50}{10000} = 5 mA$ $\therefore$ Current through diode = 9mA

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