Semiconductor Electronics Materials Devices and Simple Circuits - Result Question 68
70. 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
(a) 50
(b) 75
(c) 100
(d) 25
[2011]
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Answer:
Correct Answer: 70. (a)
Solution:
- (a) The current gain
$ \beta=\frac{\Delta I_C}{\Delta I_B}=\frac{10 mA}{200 \mu A}=\frac{10 \times 10^{3}}{200}=50 $
