Infinite Resistance

[crossman]

Re: Infinite Resistance

Stuff like this is pretty fun to kick around, even though I admit I really don't have a clue, just trying to kick things around based on what I already know.

I took a AA 1.5v battery and shorted it with my simpson set on current 10 amp scale and was surprised to see 5 amps of current flowing, but as I continued to read the current, it was falling at a pretty steady rate, down to about 4.5 amps after 10 seconds at which point I stopped the reading. The internal resistance of the battery is what keeps the whole chemical reaction from going at once.

I am fairly certain that this internal resistance of a battery is not the same animal as the resistance of a piece of wire or a common resistor.

 

[tom baker]

Re: Infinite Resistance

This topic will self destruct at 200 posts
Just kidding

 

[Ed MacLaren]

Re: Infinite Resistance

Here are a few websites that address the subject of internal resistance.

Battery University
Battery Comparisons
Some Battery Calculations

Ed

[ January 13, 2005, 09:08 PM: Message edited by: Ed MacLaren ]

 

[physis]

Re: Infinite Resistance

It seems, Crossman, you are just about ready to accept the concept of internal resistance.

You know, transformers have that too, sept it's impedence. I'm not saying you should do dangerous things, but I taught myself electricity partly by damaging things. Sometimes on purpose, sometimes not.

 

[physis]

Re: Infinite Resistance

I am fairly certain that this internal resistance of a battery is not the same animal as the resistance of a piece of wire or a common resistor.

Crossman, A circuit is a circle. That's why I asked that silly question a page or two ago.

 

[crossman]

Re: Infinite Resistance

I have this feeling that I am going to do post a diagram before the day is over...

 

[steve66]

Re: Infinite Resistance

Do those moles explode too?

Probably, if you overcharge them or short them out

 

[physis]

Re: Infinite Resistance

I was thinking Caddy Shack.