Question

Two identical P-N junctions may be connected in series with a battery in three ways. The potential drops across the two P-N junctions are equal in

• A. Circuit 1 and 2
• B. Circuit 2 and 3
• C. Circuit 3 and 1
• D. Circuit 1 only

Answer 1

The correct option is B Circuit 2 and 3

In circuit 1 left diode is forward bias and right one is reverse biased so potential difference across both are different.

In circuit 2 both the diodes are forward biased so potential difference across both will be equal In circuit 3 both the diodes are reverse biased so potential difference across both will be equal.