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[Phys-L] Re: [Bulk] Re: A battery cell



The formula (3) in
<http://www.av8n.com/physics/contact-electrification.htm#sec-
generators> has an obvious typing error. To get C one should divide by
the gap width, not multiply by it.

I also added an illustration and explanation of the Kelvin
bridge:

http://www.av8n.com/physics/contact-electrification.htm#sec-kelvin-
bridge

Ludwik Kowalski
Let the perfect not be the enemy of the good.
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