Does a solenoid need to be uniformly wrapped to produce an induced EMF?

Question

I am creating an EMF with a solenoid of copper wire and a neodymium magnet. I am looking at producing about 3 volts, which will require approximately 700 turns of wire. When I am creating the solenoid, does the wire have to be perfectly tight and not overlapping on the same layer? I will be creating 7 layers of wire to get the 700 turns. Would I still get an EMF if I put tape in between each layer?

Thanks in advance

Answer 1

By winding the wire as tightly as feasible, you eliminate the dead air spaces between the windings and move the actual wires closer to the strongest magnetic field area. It'll work regardless if it's loosely wound and not evenly spaced for the maximum amount of wire in the smallest area - but it won't be nearly as efficient.

Answer 2

yes, you can wind it any old way, as long as you make all the windings in the same direction. You may lose a little in the magnetic field, but that's all. Yes, you can use tape between layers.

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Answer 3

The tighter the better, stronger magnetic field

Looking at the solenoid on end keep wrapping

clockwise or counterclockwise. For example,

if clockwise, wrap all 7 layers clockwise. Tape

is okay, but you'll have a little less EMF.