Q. Two identical p-n junctions are connected in series in three different ways as shown below to a battery. The potential drop across the p-n junctions are equal in

A) Circuits 2 and 3
B) Circuits 1 and 2
C) Circuits 1 and 3
D) None of the circuit
Explanation

(a) In circuit 2, each p-n junction is reverse biased, some current will flow giving equal potential difference across each p-n junction diode. In circuit 3, each p-n junction is forward biased, hence same current flows, giving same potential difference across p-n junctions.

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.