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The P-N junction diode conducts in which direction.

(a) Reverse direction

(b) Forward direction

(c) Both Forward and Reverse direction

(d) Neither Forward nor Reverse direction

I have been asked this question during a job interview.

Asked question is from The Volt Ampere Characteristics topic in division Semiconductor-Diode Characteristics of Electronic Devices & Circuits

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The correct answer is (b) Forward direction

To elaborate: The P-N junction diode conducts only in forward direction, it will not conduct in reverse direction so only Zener Diode was introduced as it conducts in both forward and reverse direction.

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