If the two ends of a p-n junction are joined by a wire,
(a) there will not be a steady current in the circuit
(b) there will be a steady current from the n-side to the p-side
(c) there will a steady current from the p-side to the n-side
(d) there may or may not be a current depending upon the resistance of the connecting wire.

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Solution

(a) there will not be a steady current in the circuit

In a p‒n junction, current flows only if it is connected to the battery. If two ends of a p‒n junction are joined by a wire, then there will be diffusion and drift currents in the circuit and they will cancel each other. Hence, no current will flow in the circuit.

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