Lab #8- NPN Transistor check explains how an NPN transistor works to amplify a signal. When current was delivered to the emitter lead of the transistor, the LED that was connected to the base lead lit up and the LED connected to the collector lead lit up significantly brighter. This shows how the transistor takes an initial signal and amplifies the current to achieve a larger output. These are different than PNP transistors mainly in their polarity as an NPN transistor is made up of a positively doped material sandwiched between two negatively doped material whereas a PNP transistor is the opposite way as indicated by the letters. "P" representing positive and "N" representing negative.
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