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Re: [Phys-l] Which one is positive?

I thought the problem was polarizing the voltmeter. Hence the appeal to electrochemical cells, cathode rays, PE effect, thermionic emission, mobility in conductors and fluids, etc.

bc


On 2010, Jun 17, , at 09:06, John Denker wrote:


From the keen-grasp-of-the-obvious department: If you
want to know which is positive, use a voltmeter.