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Math Help - function of a electromagnetic coil

  1. #1
    Junior Member turbod15b's Avatar
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    function of a electromagnetic coil

    how does a moving coil meter function?

    what happens when it is connected into an electric circuit to measure the current flowing
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by turbod15b View Post
    how does a moving coil meter function?

    what happens when it is connected into an electric circuit to measure the current flowing
    The field produced by the current in the coil produces a magnetic field, which
    then interacts with that from the static permanent magnet/s resulting in a
    turning moment on the coil which turns until the torque from the magnetic
    fields is matched by that from the springs or torsion in the suspension system.

    See here

    RonL
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  3. #3
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by CaptainBlack View Post
    The field produced by the current in the coil produces a magnetic field, which
    then interacts with that from the static permanent magnet/s resulting in a
    turning moment on the coil which turns until the torque from the magnetic
    fields is matched by that from the springs or torsion in the suspension system.

    See here

    RonL
    I will add to this (very nice) description only one small thing: The grand-daddy of all these devices is the galvanometer. If you can understand a galvanometer, you will understand all of them.

    -Dan
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