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Is a pn junction diode unilateral or bilateral?

in Electrical Engineering

Is a pn junction diode unilateral or bilateral?

1 Answer

A PN junction diode is unilateral.

This means that it allows current to flow in only one direction — from the P-type (positive) side to the N-type (negative) side, when it is forward biased. In the reverse bias (when the N-type is connected to the positive terminal and the P-type to the negative), the diode blocks current flow, acting as an open circuit.

So, the diode is unilateral because current can only flow in one direction, not both.

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