W. D. Niven, of Trinity College, Cambridge. A Treatise on Electricity and Magnetism. By James Clerk Maxwell. Second Edition. (Oxford: At the Clarendon Press, 1881.) An Elementary Treatise on ...
Electromagnetism is due to the magnetic fields around electric currents. The fields can cause forces with other nearby magnets which can be used to make motors spin and loudspeakers produce sound ...