Oersted's Experiment

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Oersted's experiment
Class experiment
This is one of the greatest demonstrations in the history of electromagnetism.
Apparatus and materials

•Copper wire, PVC-covered, 26 SWG, 50-100 cm with bare ends
•Plotting compass
•Power supply, low-voltage ('Westminster pattern' very-low-voltage supplies are best)
Technical notes
The power supplies used in this experiment must be able to allow a current of up to 10 amps to flow when a short piece of wire is connected across its 1 or 2 volt terminals. Many 0-12 volt power supplies will not pass such high currents and so the trip switch will cut out or, worse still, the power supply will be damaged. Students should be encouraged to switch off the power supply when they are not using it because the wires and coils will become hot.
Procedure
a Using wire strippers, bare approximately 3 cm of each end of the wire

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Education

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• Oersted's
• Experiment

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