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Ohm’s Law

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Statement of Ohm’s Law The basic law concerning the flow of electricity is Ohm’s Law. Ohm’s law states that when electrical potential (voltage) creates a flow of electricity (current), the current and the electrical resistance of the circuit are proportional to the voltage. In mathematical terms, V = I x R where V is voltage, I is current, and R is resistance

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**Circuits Electricity cannot flow without a complete circuit.**

A circuit consists of a source, a load, and the connecting circuit. Source Load

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Definitions Electrical Potential is the energy stored ready to do work. It is measured in volts, is represented as V, and is determined by the source in a circuit. Electrical Flow is the flow of energy from a high potential point to a low potential point. This flow is called the current, is measured in amperes (amps), and is represented as “I.”

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More Definitions Electrical Resistance is the resistance to the flow. The resistance can be either a function of the circuit material, or it can be the load. The load is the part of the circuit that converts the electrical energy into another form. (light bulbs, motors, heaters, etc.) Electrical resistance is measured in ohms and is represented as “R.”

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**Ohm’s Law Restated Another way to state Ohm’s law is:**

Potential (volts) equals current (amps) times the load (ohms). In a basic circuit, one of the three values can be calculated from the other two. = x

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