hello, i`ve just started getting into the science of electricity, and theres something i cant get my head around. From what i understand, in a simple DC circuit (two wires, battery, bulb), the energy that lights the bulb is not in the charges in the wires(moving electrons), its outside the wire in the electric and magnetic fields. Makes sense to me since in an AC system the electrons just wiggle.
What i dont get is in a DC system if the wire is too long, the system is going to lose lots of heat (energy) from the resistance of the wire. Where is all this energy coming from, just the kinetic energy of the electrons? Or are the electric and magnetic fields heating up the wires? Thanks!
What i dont get is in a DC system if the wire is too long, the system is going to lose lots of heat (energy) from the resistance of the wire. Where is all this energy coming from, just the kinetic energy of the electrons? Or are the electric and magnetic fields heating up the wires? Thanks!