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Figure shows a DC voltage regulator circuit, with a Zener diode of breakdown voltage = 6V. If the unregulated input voltage varies between 10 V to 16 V, then what is maximum Zener current ? R L = 4 k Ω I Z I L R S = 2 k Ω I S

1. 3.5 mA
2. 1.5 mA
3. 2.5 mA
4. 7.5 mA

Correct answer: 3.5 mA

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