Question
Question: Consider an NPN transistor amplifier in common-emitter configuration. The current gain of the transi...
Consider an NPN transistor amplifier in common-emitter configuration. The current gain of the transistor is 100. If the collector current changes by 1 mA, what will be the change in emitter current
A
1.1 mA
B
1.01 mA
C
0.01 mA
D
10 mA
Answer
1.01 mA
Explanation
Solution
Current gain β=ΔibΔic⇒Δib=1001×10−3=10−5A
= 0.01mA.
By using Δie=Δib+Δic⇒Δie= 1.01 + 1 = 1.01mA.