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Question: Answered & Verified by Expert
In a $p-n$ junction diode not connected to any circuit
PhysicsSemiconductorsKCETKCET 2010
Options:
  • A the potential is the same everywhere
  • B the p-type side has a higher potential than the n-type side
  • C there is an electric field at the junction directed from the n-type side to p-type side
  • D there is an electric field at the junction directed from the p-type side to n-type side
Solution:
2963 Upvotes Verified Answer
The correct answer is: there is an electric field at the junction directed from the n-type side to 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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