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In a regulated power supply two similar 15 V zeners are...

This question belongs to Electrical Engineering Regulated DC Power Supply
Regulated DC Power Supply
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In a regulated power supply, two similar 15 V zeners are connected in series. The input voltage is 45 V d.c. If each Zener has a maximum current rating of 300 mA, what should be the value of the series resistance?

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Correct Answer: Option B
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