CECAD TECHNICAL DOCUMENTS
Be sure to check out the Ohm's
Calculator to help you determine circuit values.
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 points of
high voltage to points of low voltage on the surface
of a conductor.
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)
( R ) Resistance
determines how much current will flow through a
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.
is measured in
( P ) Power
is the amount of current times the voltage level at a
given point measured in wattage or watts.
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