Question

A transistor is operated in common emitter configuration at V_c = 2 V, such that a change in the base current from 100 µA to 200 µA produces a change in the collector current from 5 mA to 10 mA. The current gain is

(a) 100

(b) 150

(c) 75

(d) 50

Answer 1

(d) 50

Explanation: Current gain,

\(β=\frac{ΔI_c}{ΔI_B}\) = \(\frac{(10-5)\times10^{-3}}{(200-100)\times10^{-6}}\) = 50