Voltage

Voltage, also known as electric pressure, electric tension, or potential difference, is the difference in electric potential between two points. In a static electric field, it corresponds to the work needed per unit of charge to move a test charge between the two points

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Abbreviation: R

Current

An electric current is a flow of charged particles, such as electrons or ions, moving through an electrical conductor or space. It is defined as the net rate of flow of electric charge through a surface

Abbreviation: I

Resistance

Also called ohmic resistance. a property of a conductor by virtue of which the passage of current is opposed, causing electric energy to be transformed into heat: equal to the voltage across the conductor divided by the current flowing in the conductor: usually measured in ohms. Abbreviation: R

Ohms Law

Ohm's Law is one of the most fundamental and important laws governing electrical and electronic circuits.

Ohm's Law relates current, voltage and resistance for a linear device, such that if two are know, the third can be calculated.