Transistor Switch:
Since transistors are semi conductors, they need certain circumstances for them to become conductor from an insolator. For example the NPN transistor where it has Negative (electrons) on the first part, Positive (protons) in the middle, and Negative (electrons) on the other end. electricity will not flow through it because the proton acts as a barrier. When electricity is given to the middle, the protons will move up due to the electricity rule, similar charges repel, positive charges attract. When the protons in the middle move, the barrier is moved and electricity is allowed to flow through the transistor from one side to the other, and the circuit is then allowed to have electricity flow through it.
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