From my understanding when a magnetic field passes through a coil it generates a current. What prevents us from being able to create a coil that can harness earths magnetic field to generate a current/electricity? Would it need to be huge? Is the earths magnetic field to low? Idk I’ve been thinking about it a lot recently and I just don’t understand why it wouldn’t work.
In: Planetary Science
It has to be a movingchanging magnetic field to make current in a coil. Eg if you hold a magnet beside a wire loop nothing happens. If you *spin* a magnet inside a wire loop it makes electric current in the wire.
Having a coil on the Earths surface doesn’t make electricity because the field and the coil are both stationary relative to each other. It’s like just holding a magnet and wire beside each other. You’d need a coil outside of the planet while the Earth spins beside or inside of it to generate electricity.
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