Why is it not possible to induce current from the Earth's magnetic field? I thought Maxwell said that electric fields and magnetic fields were the same thing.

Talon Mcbride 2022-07-17 Answered
Why is it not possible to induce current from the Earth's magnetic field? I thought Maxwell said that electric fields and magnetic fields were the same thing.
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Answers (1)

Coleman Ali
Answered 2022-07-18 Author has 13 answers
The law of induction of electromotive force is E = d Φ / d t \mathscr E = -\text d \Phi / dt where Φ \Phi is the magnetic flux. Thus, for generating an electromotive force E \mathscr E a variable magnetic field is needed in your coil. I am not sure whether the magnetic field of the Earth varies in time at all, and surely not as quickly and in the form as needed for producing current in your coil.
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