Practice portal › Semiconductor Electronics › Zener Diode as a Voltage Regulator

For the circuit shown below, calculate the value of I_z. [Figure: a 100 V source Vᵢ in series with Rₛ=1000 Ω feeds a Zener diode (V_z=50 V, reverse biased) in parallel with a load R=2000 Ω.]

Asked in JEE Main 20th July 1st Shift 2021 · Zener current and series resistance

• (1) 0.15 A
• (2) 0.05 A
• (3) 25 mA
• (4) 0.1 A

Step-by-step solution

Why the other options are wrong

• (1) Adds currents instead of subtracting.
• (2) This is the total series current.
• (4) Uses the full 100 V across 1000 Ω.

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