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MHT CET 2024 (4 May, Shift 1) · Special Purpose Diodes

Special Purpose Diodes question from MHT CET 2024 (4 May, Shift 1)

Q32MHT CET 2024 · 4 MAY · SHIFT 1Medium

Special Purpose Diodes

A zener diode, having breakdown voltage 15 V is used in a voltage regulator circuit as shown. The current through the zener diode is

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Answer: (b)

Output held at $15$ V, so drop across $250\ \Omega$ is $20 - 15 = 5$ V.
$I = \frac{5}{250} = 20$ mA
$I_L = \frac{15}{1000} = 15$ mA
$I_Z = 20 - 15 = 5$ mA, so the answer is (b).

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