Current-carrying coil and solenoid

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    Coil Current Solenoid
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What is the difference between a current-carrying coil and a solenoid?
 
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Baluncore said:
The difference is the current.
https://en.wikipedia.org/wiki/Solenoid
Assume that the same current I passes through the coil and the solenoid. Honestly, that picture in the Wikipedia article looks like a coil to me. It seems that both a coil and a solenoid have N turns of a current-carrying wire with radius r, and I don't see the difference.
 
Meow12 said:
Assume that the same current I passes through the coil and the solenoid.
Then the only difference is the shape of the coil.
A solenoid is a helix.
A coil wound on a toroid, or as a planar spiral, is not a helix, so not a solenoid.
 
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