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JEE Main 2022 · 24 Jun · Shift 2, Physics question 55

In the given circuit, the value of current ILI_L will be ______ mA.

(When RL=1 kΩR_L=1\ \mathrm{k\Omega})

A 10 V battery feeds, through an 800 Ω series resistor, a 5 V Zener diode connected across the supply in reverse bias, with the load R_L = 1 kΩ in parallel with the Zener; I_L is the current through R_L.
Answer and worked solution

Official answer: 5

Zener conducts? Without it, the load would get 10×10001800≈5.610\times\dfrac{1000}{1800}\approx5.6 V >5>5 V, so the Zener breaks down and holds the load at 5 V.

Load current. IL=51000I_L=\dfrac5{1000} A =5=5 mA.

Answer: 5

Topics:Special diodes (LED, Zener, photodiode, solar cell)
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