In a common emitter configuration the current amplification factor is expressed as
______.
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A.
(ΔIC / ΔIB )VCE
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B.
(ΔIE / ΔIC )VCE
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C.
(ΔIC × ΔIB )VCE
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D.
(ΔIB / ΔIC )VCE
Correct Answer:
A. (ΔIC / ΔIB )VCE
Explanation:
In a common emitter (CE) configuration, the emitter terminal is shared by both the input and output circuits. The current amplification factor, denoted as β (beta), represents the ratio of the output current to the input current. Specifically, it is calculated as the change in collector current (ΔIC) divided by the change in base current (ΔIB) while maintaining a constant collector-emitter voltage (VCE). This relationship is mathematically expressed as β = ΔIC / ΔIB at a constant VCE. This factor indicates the transistor's ability to amplify a small base current into a significantly larger collector current.
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