The diffusion current in a p-n junction is: - Vidyadip

MCQ

The diffusion current in a $p-n$ junction is:

A
From the $n-$side to the $p-$side
✓
From the $p-$side to the $n-$side
C
From the $n-$side to the $p-$side if the junction is forward$-$biased and in the opposite direction if it is reverse$-$biased
D
From the $p-$side to the $n-$side if the junction is forward$-$biased and in the opposite direction if it is reverse$-$biased

✓

Answer

Correct option: B.

From the $p-$side to the $n-$side

Holes from $p-$type diffuse into the $n-$type and electrons from $n-$type diffuse into the $p-$type due to concentration gradient to form a depletion region which results in the rise of diffusion current flowing from $p$ to $n$ side.

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