Ohm's law
Wednesday, April 28, 2010
12:31 PM
Ohm's law
Resistance = resistance to letting current pass 
Voltage (V volts) = current (I amps) * resistance (R ohms (Ω)) 
(V = IR)
Combining this with P=VI, we get P=I2R=V2/R.
Power (watts) = (current (amps))2 * resistance (ohms) 