Magnetic Field Demonstrators: IEC makes 3x different types: 1) EM2067-010 A rectangular coil that provides the field pattern of a straight conductor passing through a surface. 2) EM2067-020 A round coil that provides the field pattern of 2x conductors passing through a surface with current passing up in one and down in the other. 3) EM2067-030 A solenoid wound through the surface to provide the field pattern of a solenoid. Designed to be used with mini 'plotting compasses', but fine iron filings can show the patterns if the surface is tapped to vibrate the iron particles. NOTE: Labels are fitted to advise maximum currents to use to avoid overheating.

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Brand : IEC