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Electromagnet Question

Discussion in 'Electrical Engineering' started by Les & Claire, Apr 15, 2004.

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  1. Les & Claire

    Les & Claire Guest

    Hi there!
    Right, i've dropped a small nut down into the interior of
    my timing cover whilst changing a water pump on my Volvo. This normally
    means a huge strip down for a stupid mistake. But, I surmised that as the
    cover is plastic and open at the top, I have 12 - 15V DC easily available
    and a multitude of steel / iron tools I could wind a coil round an iron rod,
    then connect it accross the terminals of the cars battery. Thus forming an
    electromagnet to "tickle" the nut up the front of the plastic cover until I
    can recover it.

    What i'm worried about is that i'm basically making a dead short accross the
    terminals. Am I right in thinking that it's the length / thickness of the
    copper wire that will cause enough resistance to protect the battery? If so,
    how long is safe? ( Hmmm, this appears to be a "How long is a piece of
    string" question ) Is this a way to get out of a bind, or a way to wreck the
    battery?

    Les

    --
    http://www.stuffmongers.com

    "Homo sapiens, the first truly free species, is about to decommission
    natural selection, the force that made us.... Soon we must look deep within
    ourselves and decide what we wish to become."
    Edward O. Wilson
    Consilience, The Unity of Knowledge

    Remove frontal lobes to reply from a NG
     
  2. Mike

    Mike Guest

    I would just purchase a magnet, rare earth ones are very strong, save your
    battery for starting your car
     
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