eli5: why do we use coils to generate a magnetic field? why does adding more coils increase the magnetic field strength better than other shapes?

Question

Why a coil shape basically, why not some other shape, why is a coil more advantageous?

In: 13

Answer 1

the best shape for generating a magnetic field is a closed loop actually. A coil; especially one where the turns are close together as possible is essentially a stack of identical loops all generating a magnetic field of the same direction in the same region with the same current. increasing the amount of space between each turn on a fixed number of turns will actually reduce the strength of the magnetic field generated