Bacterial diaper rash may be caused by several different organisms. The most common are Staphylococcus aureus (Staph), which also causes impetigo, and Group AStreptococcus (Strep), which usually is seen as strep throat.
A light-emitting diode (LED) is a semiconductor device that creates light using solid-state electronics. A diode is composed of a layer of electron rich material separated by a layer of electron deficient material which forms a junction.
If this circuit didn't have a transistor to amplify the current, the LED would not light. However, with the transistor and the amplification it provides, the current is amplified large enough to light the LED. This is how it works: -The small current travels from the voltage source into the base of the transistor.