|MadSci Network: Physics|
A standard experiment is to vary the current through an electromagnet made from a soft iron core about 8 mm. diameter and 12 cm. long with 100 turns of wire. With currents below about 1 amp, there is very little effect (measured by counting paperclips picked up or by measuring the force on a soft iron rod) Over one amp the relationship is clearly linear. It is not an effect due to the clips or the rod becoming magnetised) Why is this?
Re: Electromagnet field strength vs current
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