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KCET2010PhysicsSemiconductors

In a p-n junction diode not connected to any circuit

Options

  1. Athe potential is the same everywhere
  2. Bthe p-type side has a higher potential than the n-type side
  3. Cthere is an electric field at the junction directed from the n-type side to p-type side
  4. Dthere is an electric field at the junction directed from the p-type side to n-type side

Correct answer

C. there is an electric field at the junction directed from the n-type side to p-type side

Step-by-step solution

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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