Physics, 15.03.2020 04:27 terrasami3152

Help please!

Which setup could not be used to induce an electric current?

Spinning wire coils within an array of fixed permanent magnets
Spinning electromagnets within an array of fixed wire coils
Spinning permanent magnets within an array of fixed permanent magnets
Spinning wire coils within an array of fixed electromagnets

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Which setup could not be used to induce an electric current?

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