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So, how do we create current?. When two materials of opposite charge are connected by a conductor, the charges travel from one material to the other. Coulomb: Unit of charge. Equal to the amount of charge on 6.24*10^18 electrons. Or, the number of electrons in ~25microns of wire. [10^(-6)]m (C)
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When two materials of opposite charge are connected by a conductor, the charges travel from one material to the other
Coulomb: Unit of charge. Equal to the amount of charge on 6.24*10^18 electrons. Or, the number of electrons in ~25microns of wire. [10^(-6)]m (C) This can be thought of as the amount of water a hose can carry in a small sliver of the hose.
Voltage: Difference in electric potential energy between two points in space or in a wire. Expressed in Joules per Coulomb. (J/C) Voltage can be thought of as the pressure in a hose pushing the water along. Remember Joules are a measure of “energy”.
Joule: Unit of energy. Expressed in Newton meters, i.e. the energy expended in applying one Newton of force through one meter. (J) Lift a quarter pound one meter.
Current: Motion of charges through a wire. Specifically, the number of electrons which pass through a cross section of wire per second. (C/S) Analogous to the amount of water flowing through a hose per second.
Watts: The amount of energy per second passing through a wire. (J/S)