If electricity can be used to create a magnet/electromagnet, why can’t a magnet be used to create electricity without it moving?
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One reason is that it is useless tech.
We have electricity. We don’t have on command magnetic forces, so we use the electricity to get what we need, a magnetic force.
The opposite can be done but we don’t have strong enough magnetic fields in nature, having no magnetic field to harvest means that a magnetic field harvesting device is useless.
We do have systems like that that are used as sensors for navigation. They transform the earth magnetic field in electrical power, and this power goes to a device that display the compass. For aircraft for example. But that’s just enough to give a North indication, not enough to power a led lamp or else.
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