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Solution


Q.

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  

Ans.

(3)

Zener is in breakdown region.

I3=10500=150

I1=10200=120

I2=I1-I3

I2=(120-150)=(3100)=30 mA