Read the passage and answer the question.
A junction diode cannot be used for amplification so another type of semiconductor device, a transistor, is used. It is a three section semiconductor with three sections being the emitter, the collector and the base. Common emitter characteristics of a transistor are graphs that are obtained between voltage and current, when emitter is earthed, base is used as input terminal and collector as the output terminal.
For collector voltage VC being constant and base current being IB, what will be the collector current if IB is increased?
Answer & explanation
Correct answer: option 2
$I_C = \beta I_B$
SO $I_C \propto I_B$
For constant Vc, IC increases with IB.