so for say a 2 inch diameter coil and 2 inch high, with 10 turns, total wire length is 62 inches = 5.23 ft or 5.23 nanoseconds in terms of speed of light propagation through the coil. so would it take 5.23 nano seconds for a signal to reach from beginning to end. since it is going through all the wire length.

OR

does the electric field move through out the coil

so coil diameter is 2 inches and 2 inches high.

So the max amount of time needed for the signal to go from beginning to end is 160 picoseconds because the electric field doesn't move through the wire like the current does but instead moves in all directions at light speed and intersecting each turn causing current to flow.

so which is right?