When a PN junction diode is reverse biased - Vidyadip

MCQ

When a $PN $ junction diode is reverse biased

A
Electrons and holes are attracted towards each other and move towards the depletion region
✓
Electrons and holes move away from the junction depletion region
C
Height of the potential barrier decreases
D
No change in the current takes place

✓

Answer

Correct option: B.

Electrons and holes move away from the junction depletion region

b
(b) when a $p-n$ junction is reversed biased, the negative terminal of the battery attracts the free holes in the $p-type$ towards itself whereas the positive terminal attracts the free electrons in $n-type$ towards itself. Hence, the electrons and the holes move away from the junction which results in increasing of the depletion width as well as the potential barrier.

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