Asked by dallasboy
Tonya is modeling the discovery of electromagnetic induction. Which procedure should she use?
moving a magnet into a coil of wire in a closed circuit
moving a magnet into a coil of wire in an open circuit
bringing a compass near a wire that has no electric current
bringing a compass near a wire that has an electric current
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moving a magnet into a coil of wire in a closed circuit
Reason: electromagnetic induction is produced by a changing magnetic flux through a loop. Moving the magnet into a coil changes the flux and, if the coil is part of a closed circuit, induces a measurable current (Faraday’s experiment). An open circuit produces no current, and using a compass near a wire tests magnetic fields from currents (Oersted’s effect), not induction.
Reason: electromagnetic induction is produced by a changing magnetic flux through a loop. Moving the magnet into a coil changes the flux and, if the coil is part of a closed circuit, induces a measurable current (Faraday’s experiment). An open circuit produces no current, and using a compass near a wire tests magnetic fields from currents (Oersted’s effect), not induction.
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