Physics · Zener Diode Voltage Regulator

A Zener diode voltage regulator circuit uses two series-connected Zener diodes, each rated at 5 W, 10 V, to obtain a 20 V regulated output across a load resistance RL from a 35 V DC power supply. What is the required value of the series resistance R to ensure proper regulation at maximum Zener power dissipation?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

Correct answer

30 Ω

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