The Iraq War: How We Spent $800 Billion (and Counting) Follow @sarah_childressMarch 18, 2013, 1:36 pm ET. The Iraq war cost twice as much as the war in Afghanistan, and more than 16 times as much as the Bush administration predicted.
emitter. 1  a person or thing that emits. 2  Electronics. an electrode on a transistor from which a flow of electrons or holes enters the region between the electrodes.
The main differences between emitter and collector are doping concentration and size. The emitter is heavily doped, while the collector is lightly doped. You could try to swap them, but you'll get a very low \$H_{FE}\$, probably even less than 1.