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Ohm's Law

Ohm's Law defines the relationships between (P) power, (E) voltage, (I) current, and (R) resistance. One ohm is the resistance value through which one volt will maintain a current of one ampere.
( I ) Current is what flows on a wire or conductor like water flowing down a river. Current flows from negative to positive on the surface of a conductor. Current is measured in (A) amperes or amps.
( E ) Voltage is the difference in electrical potential between two points in a circuit. It's the push or pressure behind current flow through a circuit, and is measured in (V) volts.
( R ) Resistance determines how much current will flow through a component. Resistors are used to control voltage and current levels. A very high resistance allows a small amount of current to flow. A very low resistance allows a large amount of current to flow. Resistance is measured in ohms.
( P ) Power is the amount of current times the voltage level at a given point measured in wattage or watts.


Ohm's Law:
Ohm's Law Pie Chart
Ohm's Law Calculators and Formulas
Voltage Resistance Amperage or Current Power E times I = P I squared times R = P E squared divided by R = P square root of (P times R) = E P divided by R = E I times R = E E divided by I = P E squared divided by P = R P divided by ( I squared ) = R square root of ( P divided by R ) = I P divided by E = I E divided by R = I
Ohm's Law
Ohm's Law
Mobile Electronics Basics:
Diodes
Glossary of Terms and Definitions
Ohm's Law
Recommended Books & DVD's
Recommended Wire Sizes
Relays
Resistors
Tools and Equipment



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