Re: SC a battery

From: John G (Greentest_at_ozemail.com.au)
Date: 12/27/04 

Date: Mon, 27 Dec 2004 19:10:21 +1100

"Ken O" <lerameur101@Ya.com> wrote in message
news:jLLzd.11651$Tn1.243473@news20.bellglobal.com...
>
> "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
This may be sci.electronics.misc but your question should be in
sci.electronics.basics and in fact it so basic that you should either
read a lot or go to http://www.ibiblio.org/obp/electricCircuits/ and
study quite a lot then you could understand some answers to relatively
simple questions. 

-- 
John G
Wot's Your Real Problem?

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