Re: SC a battery

From: Ken O (lerameur101_at_Ya.com)
Date: 12/27/04 

Date: Sun, 26 Dec 2004 22:58:14 -0700

"Peter Bennett" <peterbb@somewhere.invalid> wrote in message
news:ubrus0tci5nfr1h880utim137eqnpvsr69@news.supernews.com...
> On Sun, 26 Dec 2004 19:00:16 -0700, "Ken O" <lerameur101@Ya.com>
> wrote:
>
>>hello
>>
>>Here is another basic questions.I would to know why does a battery create
>>sparks when you take a wire and touch the negative of a battery with the
>>positive.?
>>Also why is it said there are no current?
>
> Says who?
>
>>V = I * R is the basic formula, with a negligable resistance in the wire
>>and
>>lets say a 12 volt fully charge car battery. With no resistance, there
>>can
>>be no current?
>
> No. With a very low resistance, you will have a very large current -
> turning the Ohm's Law equation around to solve for current, you get I
> = E/R. For a 12 volt battery, and a foot of #12 wire (1.65 ohms/1000
> ft), you get I = 12/.00165 = 7273 amps!!
>
>>but if there is no current, why is there sparks. The voltage in this case
>>is
>>only a potential.
>
> There is Lotsa current, therefore Lotsa sparks.

Ok so what you are saying is the battery is able to give it off but not
able to receive it at the same rate!
So the internal resistance of the battery is therefore much higher then the
wire,
correct?

Ken

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