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Ohm's Law

What will be ...

Question

What will be the possible graph of drift current and diffusion current as soon as p - n diode is formed? Current from n to p is taken positive.
$i_{1}$ is diffusion current and $i_{2}$ is drift current.

A

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B

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C

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D

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Solution

The correct option is D

It was given that current from n to p is positive.
$I_{j u n c t i o n} = I_{d r i f t} + I_{d i f f u s i o n}$
S0,
$I_{d r i f t} = + v e I_{d i f f u s i o n} = - v e$
at equilibria: $I_{j u n c t i o n} = O$

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