Electronic Devices & Circuits - GATE practice papers - Electronics & Communication for Q. 494

Q.  Which phenomenon in BJT is responsible for reduction in the effective base-width due to reverse-biasing of base-collector junction? (Marks : 01)
- Published on 19 Oct 15

a. Hall Effect
b. Early Effect
c. Fermi-Level Effect
d. All of the above

ANSWER: Early Effect
 
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.

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