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Re: Average, RMS and Power Factor made easy!



Original poster: "35045 by way of Terry Fritz <twftesla-at-uswest-dot-net>" <free0076-at-flinders.edu.au>



On Wed, 10 Jan 2001, Tesla list wrote:

> Original poster: "Terry Fritz" <twftesla-at-uswest-dot-net>
> 
> However.....  What will the meters say??  The volt meter will read 0.5 VRMS
> and the current meter will read 0.5 ARMS!!  If you multiply them the power
> appears to be 0.25 watts.  But, of course, that is not true.
> 

You slipped up the calculation of RMS values although it won't affect the
argument. Probably forgot the square root.

Should be 0.707 VRMS and 0.707 ARMS, giving 0.5 W... Assuming 50% duty
cycle square waves.

Have fun,
Darren Freeman