What power generators, etc don't use magnets?

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I've been thinking about this for a few seconds and am a little stuck in the
old brain area. What types of power generators in today's world "DON'T" use
magnets? I can only think of a transducer like a Solar Panel that would
generate power with out the need of them.

Really everything uses a magnetic motor/generator to convert motion to
electricity.

Cheers,

Matthew.

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