Electronics Engineering Question:

Emitter, base and collector are the three terminals of a transistor. Emitter emits majority carriers and is highly doped. Collector collects these majority carriers after the majority carriers reach base. Base is lightly doped region. As the collector is reponsible to collect majority carriers injected from the emitter it should have sufficient power handling capacity. This emphasises the need for largest area of capacitor.
Also area and doping of the base should be lowest because most of the carriers it obtains from the emmiter should contribute towards conduction.