Re: Multimeter use help

Posted by KEB on November 05, 2005 at 15:13:45 from (209.108.192.162):

In Reply to: Re: Multimeter use help posted by kfox on November 05, 2005 at 14:06:25:

DC = Direct Current, like you get out of a battery, has only one polarity.

AC = Alternating Current, like you get out of the wall in your house, polarity alternates 60 times/second.

BY CONVENTION, the terms AC and DC are used to describe both voltage and current, i.e., DC voltage has only one polarity, AC voltage alternates polarities. You need to blame someone back in the early days of electrical power for that convention, probably either Thomas Edison, who favored DC power distribution, or George Westinghouse, who favored AC power distribution (and won, by the way).

Keith
(Not yet retired electrical engineer)

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