## Electricity purposes, such as light bulbs, cell phones,

Electricity is the flow of electrons through a medium, commonly aconductive wire made of copper, or other material. Electrons create charge, andthis charge is harnessed for daily purposes, such as light bulbs, cell phones, andcomputers are all examples of devices that harness the movement of electrons tocreate electricity and function.  A DC circuit is a group or one loop of conductive material thatallows the flow of electrons (electricity). It can be composed of resistors,capacitors, or other electronic device, and is attached to an energy source,generally a battery supplying voltage. The term DC stands for direct current,which implies that the energy source in the circuit will be supplying directcurrent.  Other type of circuit is an AC circuit, in which alternate currentis supplied, however, for this lab a DC circuit was built and analyzed, and sowe should stick with it. This specific DC circuit involves resistors and avoltage that supplies the current.

Defining Voltage, Current and Resistor Voltage is basically the potential energy between two points in aclosed circuit. There is a difference in potential between these two points,one having more charge than the other, this potential difference is whatdefines voltage. Its unit is Volt (V), and it is generally represented by theletter E, V or U in circuits. Voltage is supplied to the circuit through anenergy source, generally a battery, which transforms the chemical energy intoelectrical energy. Electric current is the flow of electricity that passes through awire, or in a circuit, when a difference in potential (Voltage) from a batteryis applied into the wire or circuit. This flow of electrons is very important,because it is what gives rise to the important activities that need energy towork. Electric current is represented by the letter I, and its unit is Amperes(A).

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Electricity can flow in two different ways depending on the typeof voltage supply, direct current (DC), or in alternating current (AC). Thedifference is on the movement of the electrons trough the conductor. In DCcircuits the current flows in one direction, and in AC, it constantly changesdirections going back and forth.

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