Question

In the depletion region of a pn-junction diode, the acceptor ions in the p region and the donor ions in the n region give rise to

• A. a potential rise from n to p region
• B. a potential rise from p to n region
• C. extraction of majority charge carriers from each region
• D. injection of mejority charge carriers into each

Answer 1

The correct option is A a potential rise from n to p region

During the formation of pn junction, the p region and n region will not have equal number of free holes and free electrons, respectively. This creates a concentration gradient, which in turn, causes the holes to diffuse from the p side to the n side, and the electrons to diffuse from the n side to the p side.