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STD 12 - 14. Semicondutor electronics — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - 14. Semicondutor electronics4 Marks
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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