A Zener diode of breakdown voltage 10V is used as a voltage regulator as shown in the figure. The current through the Zener diode is

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G1 Physics · Accepted Answer

Image Zener is in breakdown region. Current through 500 Ω resistor: I₃ = 10/500 = 1/50 A = 20 mA Current through 200 Ω resistor: I₁ = (20 - 10)/200 = 10/200 = 1/20 A = 50 mA Current through Zener diode: I₂ = I₁ - I₃ = 50 - 20 = 30 mA