NEET Physics Question - Semiconductor Physics - P-N Junction Diode and its applications

Two PN-junctions can be connected in series by three different methods as shown in the figure. If the potential difference in the junctions is the same, then the correct connections will be :

In the circuit (1) and (2)

In the circuit (2) and (3)

In the circuit (1) and (3)

Only in the circuit (1)

Solution:

In circuit 1. First Diode is forward biased and second diode is reverse biased. So, potential across 1st diode is less than 2nd diode.

In circuit 2: Both the diodes are forward biased so potential difference across them is equal

In circuit 3: Both the diodes are reverse biased so potential difference across them is equal to V/2.

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Solution:

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