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14. Semicondutor electronics — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics14. Semicondutor electronics1 Mark
MCQ
In a $PN-$ junction diode not connected to any circuit
  • A
    The potential is the same everywhere
  • B
    The $ P-$ type is a higher potential than the $N-$ type side
  • ✓
    There is an electric field at the junction directed from the $N-$  type side to the $ P- $ type side
  • D
    There is an electric field at the junction directed from the $P-$ type side to the $N-$type side
✓

Answer

Correct option: C.
There is an electric field at the junction directed from the $N-$  type side to the $ P- $ type side
c
(c)At junction a potential barrier/depletion layer is formed, with $N-$ side at higher potential and $ P- $ side at lower potential. Therefore there is an electric field at the junction directed from the $N-$ side to $P-$ side
 

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