Motors and Generators.

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…showed last 75 words of 2146 total… to vary below 50 Hertz, a change in frequency is needed Principle of AC induction motor *Changing magnetic field in electromagnet induces current in rods of squirrel cage *Current in rod, generate their own magnetic fields - oppose magnetic field of electromagnet *Repulsion of magnetic fields cause the cage to rotate - repeated 100 time a second Why the majority of motors are AC induction motors *Cheap *Simple in design *Less moving parts - low maintenance