Question

When p-n junction diode is forward biased, then ______.

Options

• the depletion region is widened and barrier height is reduced.

• both the depletion region and barrier height are increased.

• the depletion region is reduced and barrier height is increased.

• both the depletion region and barrier height are reduced.

Answer 1

When p-n junction diode is forward biased, then both the depletion region and barrier height are reduced.

Explanation:

When the p-n junction is forward biassed, the majority carriers in each part cross to the opposite side (holes in the p-section and electrons in the n-section). The width of the depletion region is lowered as a result of recombination of holes and electrons.