In a p-n junction diode, not connected to any circuit
the potential is same everywhere.
the p-type side is at 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.
there is an electric field at the junction directed from the p-type side to the n-type side.
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Correct option is C)
After joining p-type and n-type semiconductors, electrons from the n-region near the p-n interface tend to diffuse into the p-region. As electrons diffuse, they leave positively charged ions (donors) in the n-region. Likewise, holes from the p-type region near the p-n interface begin to diffuse into the n-type region, leaving fixed ions (acceptors) with negative charge. Thus, an electric field is established at the junction directed from the n-type side to the p-type side.
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