A 5.00-A current run throug a 12-guege copper wire (diameter 2.05 mm) and through a light bulb. Copper has 8.5x10^28 free electrons per cubic meter.
a) How many electron pass throuh the light bulb each second ?
b) what is the current density in the wire ?
c) at what speed does a typical electron pass by any given point in the wire ?
d) If you were to use wire of twice the diameter, wich of the above answer would change? would they incrase or decrease?