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Electronics — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsElectronics1 Mark
MCQ
In a $P N$-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
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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