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

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 14. Semicondutor electronics4 Marks
MCQ
If no external voltage is applied across $ P-N$  junction, there would be
  • A
    No electric field across the junction
  • ✓
    An electric field pointing from $ N-$ type to $P-$ type side across the junction
  • C
    An electric field pointing from $P-$ type to $ N-$ type side across the junction
  • D
    A temporary electric field during formation of $P-N$  junction that would subsequently disappear
✓

Answer

Correct option: B.
An electric field pointing from $ N-$ type to $P-$ type side across the junction
b
(b)Across the $P - N$ junction, a barrier potential is developed whose direction is from $N$ region to $P$ region.

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