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In 1831, an English scientist name Michael Faraday wanted to test the connection between electricity and magnetism. Faraday already knew that he could create an electromagnet by running a current through a wire that was looped around an iron torus or ring. In the circuit layout below, what component should be placed in Box A in order to run a current through the wire?

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A resistor
An ammeter
A magnetometer
A battery

1 answer

A battery
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