Re: Re: another look at volts, amps and watts

Posted by RAB on January 23, 2004 at 12:41:01 from (195.93.34.11):

In Reply to: Re: another look at volts, amps and watts posted by 42FarmallH on January 23, 2004 at 07:18:36:

Of course, not entirely true. You still have a current in vacuum devices, like cathode ray tubes (TV tubes, among others) where the electrons are travelling at high speed. And in liquids, the current carrying model is that of positive and negative ions (not free electrons) within the conducting medium. Semiconductors (transistors etc) are yet another group. Then, when we come to super conductors, there is no resistance at all!!!
I think we perhaps need to stick to Ohmic conductors on a tractor board.....
Regards, RAB

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