Semiconductor Electronics Materials Devices And Simple Circuits
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Semiconductor Electronics Materials Devices And Simple Circuits Ques 78
78. A transistor is operated in common emitter configuration at $V_C=2 V$ such that a change in the base current from $100$ $ \mu A$ to $300 $ $\mu A$ produces a change in the collector current from $10$ $ mA$ to $20 $ $mA$. The current gain is
[2011]
(a) $50$
(b) $75$
(c) $100$
(d) $25$
Show Answer
Answer:
Correct Answer: 78.(a)
Solution:
- (a) The current gain is the ratio of the collector current to the base current in a bipolar junction transistor.
$ \beta=\frac{\Delta I_C}{\Delta I_B}=\frac{10 mA}{200 \mu A}=\frac{10 \times 10^{3}}{200}=50 $
BETA
