Many students from lower secondary level onwards know of electromagnets, but fewer recognise that there is a magnetic effect around any current-carrying wire.
Resources to Address This
The Magnetic Fields Produced by Electric Currents (11-14)
Source - SPT/ Em02 PN04
This resource provides some brief physics narrative for the magnetic fields produced by current-carrying wires.View Resource
Linking electrical current to magnetism (11-14)
Source - SPT/ Em02 PN02
The connection between electric currents and magnetic fields was first demonstrated in 1820 by a Danish scientist named Hans Christian Oersted.
Details of the experiment are found at Em02 TA01 - Oersted's experimentView Resource
Magnetic field due to an electric current in a wire (11-16)
Source - Practical physics/ Electromagnetism/ Magnetic fields due to currents in a wire/ ...
Iron filings reveal the pattern of magnetism around a current-carrying wire, and factors that affect it.View Resource
The following references have documented this misconception:
- Maloney, D. P.; O'Kuma, T. L.; Hieggelke, C. J. and Van Heuvelen, A. () Surveying students' conceptual knowledge of electricity and magnetism. American Journal of Physics, 69 (S1),
- Karal, I. S.; Alev, N. and Baskan, Z. () Student teachers’ Subject Matter Knowledge (SMK) on electric current and magnetic field. Procedia-Social and Behavioral Sciences 2 (2),