Question

What is the current gain for a common-base configuration where ie = 4.2 ma and ic = 4.0 ma?

Answer 1

C. 50. D. 500. Answer: Option C. 40. What is the current gain for a common- base configuration where IE = 4.2 mA and IC = 4.0. mA? A. 16.80. B. 1.05. C ...

Answer 2

Answer:

0.95

Explanation:

Ie = 4.2ma (Given)

Ic = 4.0ma (Given)

The question follows the common base configuration in the circuit configuration of a bipolar transistor, where the emitter is the input electrode, collector is the output electrode and the base is reference electrode for both input and the output.  

Thus,  

Current gain = Ic / Ie  =I(out)/I(in)

where, IC=Output Current and IE = Input Current

= 4 / 4.2

= 0.95

Therefore, the current gain for a common-base configuration is 0.95