Question
Question: The current gain for a common emitter amplifier is 69 if the emitter current is 7 mA, the base curre...
The current gain for a common emitter amplifier is 69 if the emitter current is 7 mA, the base current is
A
0.1mA
B
1 mA
C
0.2mA
D
2 mA
Answer
0.1mA
Explanation
Solution
: current gain, β=IBIC
For common emitter configuration
IE=IC
∴IC=7mA
∴IB=βIC=697×10−3A=0.1mA