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Question
The collector current in a common-emitter transistor amplifier is 4 mA. When the base current is increased by 20 µA, the collector current increases to 6 mA. The current gain is ______.
Options
100
200
300
1000
MCQ
Fill in the Blanks
Solution
The collector current in a common-emitter transistor amplifier is 4 mA. When the base current is increased by 20 µA, the collector current increases to 6 mA. The current gain is 100.
Explanation:
CE current gain, `β_(dc) = (ΔI_C)/(ΔI_B)`
= `((6 - 4) xx 10^-3)/(20 xx 10^-6)`
= `2000/20`
= 100
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Bipolar Junction Transistor (BJT)
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