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 V_C being constant and base current being I_B, what will be the collector current if I_B is increased?

Collector current increases

$I_C = \beta I_B$

SO $I_C \propto I_B$

For constant Vc, I_C increases with I_B.