We Can Figure This Out.org
Virtual Lab: AC &Amp; DC Electric Motors
University of Virginia
© 2003-Present, John C. Bean
For this DC electric motor, increasing the voltage increases the current flow, the electromagnet’s field, and the rotational torque.

As a result, DC motors turn faster at higher voltages.

But what about AC electric motors?

How would we build one, and what would control its speed?
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