On Mon, 9 Apr 2001, Niall O Broin wrote:
> On Mon, Apr 09, 2001 at 12:23:13PM +0100, John P. Looney wrote:
> >
> > But cars have great big claw things on the end of the terminals, they run
> > at 12 volts, with more amps than a family of...amps. RCX blocks don't.
>> That was my first though, Kate. But in fact the higher the current going
> through something, the bigger the problem, if said something is not terribly
> conductive. Mind you, when you clamp on a car battery clamp, you're not
> leaving a very thick layer of vaseline. I don't know, because I never came
> across it as an issue, but I'd guess that resistance of a sheet is measured
> per square, resistance of a barrier layer would be per cube and so would be
the current used in a 9V RCX brick is about 500mA. not vey much. What you
shoyuld do is rotate the cell when you have it in, so you cut down the
thickness of the vaseline layer.
--
--
Bernard Tyers * Dept. of Physical Sciences * Dublin City University
* P:01.704.5520 *L:NG23 * W:frank.physics.dcu.ie/~bty
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