Re: [Phys-l] CFLs again

[Bernard Cleyet <bernardcleyet@redshift.com>]

I don't see how that would work, as I suspect the meter is a motor 
driven similarly as the d'Arsonval watt meter.

bc, would cheat by placing a high intensity PM in an appropriate position.

Brian Whatcott wrote:

> At 01:07 PM 5/18/2007,  Dr George Spagna, you wrote:
>
>  
>
> > Students put an ammeter in series with the lamp, and voltmeter in
> > parallel.  Both were digital multimeters reading true RMS current and
> > voltage.  P = IV
> >
> > BTW - students were given the assignment to test the lamps.  They had to
> > propose their own protocol.
> >
> > Dr. George Spagna
> >    
>
> I expect this provides quite respectable numbers.
>  But compare results found when driving a low voltage incandescent lamp
> from a 120 volt AC supply via a series AC capacitor.
>
> This was the basis for  a scheme to try to cheat the Electric Utility from
> their metered dues.
>
>
>
> Brian Whatcott    Altus OK    Eureka! 
>
>
> _______________________________________________
> Forum for Physics Educators
> Phys-l@carnot.physics.buffalo.edu
> https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l
>
>
>