Semiconductor Electronics Materials Devices And Simple Circuits Ques 86
86. In the case of a common emitter transistor amplifier, the ratio of the collector current to the emitter current $I_c / I_e$ is $0.96$ . The current gain of the amplifier is
[2002]
(a) $6$
(b) $48$
(c) $24$
(d) $12$
Show Answer
Answer:
Correct Answer: 86.(c)
Solution:
- (c) $\frac{I_c}{I_e}=0.96$
$\Rightarrow I_c=0.96 $ $I_e$
But $I_e=I_c+I_b=0.96 I_e+I_b$
$\Rightarrow I_b=0.04 $ $I_e$
$\therefore$ Current gain, $\beta=\frac{I_c}{I_b}=\frac{0.96 I_e}{0.04 I_e}=24$
BETA
