Physics Semiconductor Electronics P -N Junction and Semiconductor Diode / Semiconductor Devices MCQ (Single Correct)

To make a PN junction conducting

A
The value of forward bias should be more than the barrier potential
B
The value of forward bias should be less than the barrier potential
C
The value of reverse bias should be more than the barrier potential
D
The value of reverse bias should be less than the barrier potential

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Text Solution

Verified by Experts
The correct answer is:
A

A PN junction starts conducting properly when it is forward biased and the applied voltage becomes greater than the barrier potential:

• About 0.7 V for silicon diode

• About 0.3 V for germanium diode

This reduces the depletion layer and allows current to flow easily.

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