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Electromagnet Question


Les & Claire

Jan 1, 1970
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



"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


Jan 1, 1970
I would just purchase a magnet, rare earth ones are very strong, save your
battery for starting your car