MCQ
In $P-N$ junction, the barrier potential offers resistance to
- ✓Free electrons in $N$ region and holes in $P$ region
- BFree electrons in $P$ region and holes in $N$ region
- COnly free electrons in $N$ region
- DOnly holes in $P$ region
✓
Answer
Correct option: A.
Free electrons in $N$ region and holes in $P$ region
a
$P - N$ junction is the interface between $p$ type and $n$ type semiconductors. When both semiconductors are fused together opposite charge carriers are attracted and move across the junction for example : electrons get attracted towards the holes in p type semiconductor and holes get attracted towards the electrons of n type semiconductor during this movement immobile charge carriers left behind. The immobile charge carriers set up an imaginary potential across the junction and this potential is known as barrier potential. This barrier potential blocks the further movement of charge carriers across the junction hence offers the resistance to the charge carriers.
$P - N$ junction is the interface between $p$ type and $n$ type semiconductors. When both semiconductors are fused together opposite charge carriers are attracted and move across the junction for example : electrons get attracted towards the holes in p type semiconductor and holes get attracted towards the electrons of n type semiconductor during this movement immobile charge carriers left behind. The immobile charge carriers set up an imaginary potential across the junction and this potential is known as barrier potential. This barrier potential blocks the further movement of charge carriers across the junction hence offers the resistance to the charge carriers.
Hence, In $P - N$ junction, the barrier potential offers resistance to free electrons in $N$ region and holes in $P$ region.
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