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Where can you buy an electric magnetic field (EMF) besides the internet?

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Where can you buy an electric magnetic field (EMF) besides the internet?

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  1. You can't buy a field. A field is intangible, generated by a magnet or current flowing in a wire.

    EMF stands for Electro Motive Force, or voltage.


  2. A motor is a good example of applied EMF.

    The back EMF = the Voltage applied.
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