In Oersted's experiment, suppose that the compass was 0.15 m from the current-carrying wire. If a magnetic
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In Oersted's experiment, suppose that the compass was 0.15 m from the current-carrying wire. If a magnetic field of one-third the Earth's magnetic field of 5.0 × 10-5 T was required to give a noticeable deflection of the compass needle, what current must the wire have carried?
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