Q.

The diffusion current in a p-n junction is from the

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a

n-side to the p-side

b

p-side to the n-side

c

 p-side to the n-side if the junction is forward-biased and in the opposite direction if it is reverse-biased

d

n-side to the p-side if the junction is forward-biased and in the opposite direction if it is reverse-biased

answer is B.

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Detailed Solution

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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