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Cancelling bar magnet magnetic fields?

Discussion in 'Misc Electronics' started by Lory, May 27, 2005.

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  1. Lory

    Lory Guest

    A wire carrying DC has static field.. similar to the one
    in bar magnets. How come when you put two parallel wires
    together in the DC circuit. The magnetic field cancels
    while in a bar magnet, it doesn't. If you do proper
    positioning of 2 bar magnets, do you think you can cancel
    the magnetic field from bar magnets? why and why not?
    If not, why can the magnetic field in DC carrying wire
    be canceled while in magnets it can't.
    Lory
     
  2. ---------------------------
    The bar magnet has a field that varies due to the positions of all
    its iron atoms acting as tiny magnets. Its field can only be canceled
    locally to specific points where it is numerically zero. Since this
    field varies according to where along the magnet you are and where
    in space, it is not generally cancelable. The field around a wire
    is much more symmetrical and you can get them quite close together.
    Also an individual wire's field will be much smaller in intensity.

    -Steve
     
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