Q.

The circuit shown below is working as a 8 V dc regulated voltage source. When 12 V is used as input, the power dissipated (in mW) in each diode is; (considering both zener diodes are identical)__________.
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answer is 40.

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Detailed Solution

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Current in the circuit, I=128400=102A
Power dissipated in each diode, P=VI 
P=4×102=40mW

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