Two identical p-n junctions may be connected in series in which a battery in three ways , fig . The potential drops across the two p - n junctions are equal in

Options

A. circuit 1 and circuit 2
B. circuit 2 and circuit 3
C. circuit 3 and circuit 1
D. circuit 1 only

Answer

B

Explanation

In circuit 1, N is conccected with N, which is not a series combiation of P - N junction. In circuit 2, each P - N junction is forward biased, hence same current flows, giving same potential difference across each P - N junction. In circuit 3, each P - N junction is reverse biased, same leakage current will flow, giving equal potential difference across each P - N junction diode.