DyneSystems DS820F - OHMS LAW

Appendix A - Max Current Adjustment
APPENDIX B: OHM’S LAW
Ohm’s Law denes 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) = P (Power) / E (Voltage)
I (Current) = E (Voltage) / R (Resistance)
(I) Current is what ows on a wire or conductor like water owing down a river. Current ows
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 ow through a circuit, and is measured in (V) volts.
(R) Resistance determines how much current will ow through a component. Resistors are
used to control voltage and current levels. A very high resistance allows a small amount of
current to ow. A very low resistance allows a large amount of current to ow. 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.
Dyne Systems • DS820F PAU
DPD-001-04B • © Copyright Dyne Systems, Inc.
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