Question

When base -emitter voltage of a transistor connected in the common-emitter mode is changed by `20 mV` the collector current is changed by `25 mA`. Find the transconductance.
A. `1.25 Omega^(-1)`
B. `2.50 Omega^(-1)`
C. `0.5 Omega^(-1)`
D. `5.5 Omega^(-1)`

Answer 1

Correct Answer - A
`g_(m) = (Delta I_(c))/(Delta V_(BE)) = (25 xx 10^(-3))/(20 xx 10^(-3))=1.25 Omega^(-1)`.