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George Maund Investigation into the Strength of an Electromagnet Planning Experimental Procedure When electric current is passed through a wire a magnetic field is created. If you wind the wire around an iron core, then you have an electromagnet. They have North and South poles just like normal magnets, but it does have some differences - if you switch off the current, the magnetic field is lost, and the strength of the magnetic field can be altered by either changing the number of coils around the core, or by changing the current. I intend to measure the strength of an electromagnet - a magnet consisting of an iron core with plastic-coated wire rapped around. When current is applied through the wire, the iron core becomes magnetic - and I intend to test the effect of varying the current. The factors that will have an affect on the quantity I'm investigating include room temperature, material...

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