How electricity moves through wires


by webberfolds
Tags: antennas, electricity, signals, wires
webberfolds
webberfolds is offline
#19
Jan24-13, 09:06 PM
P: 65
So the electric field causes a lot more current than the magnetic field in this picture? What if the electric and magnetic fields swapped places? So do the purple arrows represent the velocity of the current? V=d*E, V is the voltage between what points? "E" is the strength of the electric field where? Thanks, I'm understanding more and more of it.
Quote Quote by yungman View Post
The higher the current, the longer the arrow.
If you look at any point along the line on z direction, the EM wave moving at almost the speed of light, so one incident, the wave is at it's peak, a moment later, it's at 0 point. The surface current change accordingly, so if you measure the voltage at one fixed point, you see the change in the E field which give the voltage where V=d*E in this case. d is the separation between the bottom and the top plate as shown in the diagram.


Register to reply

Related Discussions
when light moves what moves Classical Physics 4
Advantages/disadvantages of twisted wires VS wires bundled next to each other General Engineering 12
An object moves towards another object, which moves in straight line Classical Physics 5
Electricity and Magnetism involving copper wires Introductory Physics Homework 0
Electricity through wires General Physics 10