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JEE Main · 2024 · 30 Jan 2024 · Shift 1 · Semiconductors

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A Zener diode of breakdown voltage 10 V is used as a voltage regulator as shown in the figure. The current through the Zener diode is
  1. (A)50 mA
  2. (B)0
  3. (C)30 mA✓ Correct
  4. (D)20 mA

Answer: (C)

Solution

The Zener is in breakdown, so 10 V appears across it and across the 500 load: .

Current from the 20 V supply through the 200 resistor: .

By KCL at the Zener node: .

JEE Main · 2024 · 30 Jan 2024 · Shift 1 · Single correct option

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