Originally posted by theisgroup
all those are derivatives of ohm's law, but you stated power was the cause of the heat. and you are wrong. it is the resistance in the wire as you stated that is converted to heat that ultimately melts the wire. And ohm's law actually does not say very much in terms of electrical energy converted to heat energy. Ohm only states the relationship of current, resistance, and voltage.
And to be completely acurate. when you apply ohm's law to this, you are not looking at the voltage a battery woudl put out, the v in the equation is the voltage drop in the wire itself. so you would take the P=VI as current applied to the wire by the voltage drop of the wire. not the voltage of the battery.
sorry for the physics lesson guys, but I am a EE by education.
Fast Guy + Smart Guy = YANG!
