Question

When p-n junction diode is forward biased, potential barrier

• A. remains the same
• B. increases
• C. decreases
• D. may increase or decrease

Answer 1

The correct option is C decreases

The width of the depletion layer in a p-n junction diode decreases in forward bias due to repulsion of carriers from battery terminals, holes from p-type and electrons from n-type. Now, due to small number of ions in depletion region its potential decreases.