A current of 1400 A exits in a rectangular (0.6 X 9.0)cm copper bus bar. The current is due to free electrons moving through the bus bar at an average velocity of v meters/second. If the concentration of free electrons is 10^29 electrons per cubic meter and if they are uniformly dispersed throughout the bus bar, then what is the average velocity of an electron?
I'm stuck on this problem. Please show step by step work.
I=dQ/dt where Q is the total moving charges
This solution uses a rearranged version of the equation for current to simply solve for average velocity.