A) 0.2 mA
B) 0.1 mA
C) 0.002 mA
D) none of these
Correct Answer: B
Solution :
Key Idea: Current amplification factor or current gain is Just the ratio of collector current to emitter current. In a common-base configuration of a transistor circuit Current gain,\[\alpha =\frac{collector\text{ }current}{emitter\text{ }current}=\frac{{{i}_{C}}}{{{i}_{E}}}\] \[\Rightarrow \] \[{{i}_{C}}=0.95\times 2\times {{10}^{-3}}A=1.9\,mA\] Also emitter current is sum of base current and collector current Also, \[{{i}_{B}}={{I}_{E}}-{{i}_{C}}=2-1.9=1.9\,\,mA\] Note: Base current is very less than emitter current.
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