Thursday, September 25, 2008

Ohm's law Formula wheel

Posted on/at 4:51 PM by Sparky

Ohm's law Formula wheel

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.

Resistor memory aid

Bad = black =0
Boys = brown = 1
R@#$ = red = 2
Our = orange = 3
Young = yellow = 4
Girls = green = 5
But = blue = 6
Violet = violet/purple = 7
Gives = gray = 8
Willingly = white = 9

use you imagination for R@#$