Which phenomenon in BJT is responsible for reduction in the effective base-width due to reverse-biasing of base-collector junction? (Marks : 01)

a. Hall Effect

b. Early Effect

c. Fermi-Level Effect

d. All of the above

ANSWER: Early Effect

Explanation:

The effective base width decreases as compared to metallurgical base-width because the collector junction is in reverse-biased mode.

This effect is also renowned as base -width modulation since effective base width exhibits variations in accordance to biasing conditions.