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So I've been into electronics and electricity in general, lately. I've been trying to understand induction. Here's a few questions I had pertaining to it.

  • In what way are coils connected together to increase voltage? In parallel? In series?

  • Where does the magnetic field effect the copper coil(s)? Inside of the coil? Outside of it? The sides? Above or below? Should the field pass the coil up/down or left /right?

(From my experiments I've got it to work by placing spinning magnets inside the coils, but am curious if there are different methods of inducing the current from another angle.) Here's a few examples of different setups.

Inside coil Example 1 In front of coil Example 2

  • What produces more electricity, a larger coil with less coils, or a smaller coil with more coils? (I'd try it myself but these experiments get a little expensive sometimes.
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    \$\begingroup\$ Your last setup would be a LOT more efficient if you were to bend the long end of the nail around into a U shape so that the tip is near the other pole of the magnet. \$\endgroup\$ – Dave Tweed Oct 19 '18 at 16:12

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