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Calculating Voltage, Current and Resistance

Ohm's Law

In electrical theory, Ohm’s Law is the mathematical formula for calculating the relationship between electrical voltage, current, and resistance. If a component or circuit has unaccounted electrical values, Ohm’s Law can be used to calculate these figures.

Ohm’s Law can be presented and applied in the following formula structures:

Voltage = Current X Resistance
Current = Voltage / Resistance
Resistance = Voltage / Current

Ohm's Law Triangle

Ohm’s Law is also commonly represented by the following diagram, often called the Ohm’s Law Triangle:

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