Q.

In a PN-junction diode not connected to any circuit

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a

There is an electric field at the junction directed from the N-type side to the P-type side.

b

The P-type is a higher potential than the N-type side.

c

There is an electric field at the junction directed from the P-type side to the N-type side.

d

The potential is the same everywhere.

answer is C.

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Detailed 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 filed at the junction direction from the N-side to P-side.

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