On 20/05/14 03:19, Ian Field wrote:


wrote in message
news:alpine.BSF.2.00.1405181650420.37808@bunrab...
On Fri, 16 May 2014, Uncle Peter wrote:

But I wonder if it would help reduce the meter reading?

No. The coil and the capacitor add up (ideally) to zero impedence, so
it's like you put a wire accoss the mains. It burns and/or the
breaker/fuse opens. For real components the coil & cap still cancel
out and leave basically the resistance of the coil, which for a
``large'' coil is probably small, so again bad things happen.

But you have a basic fallacy anyway. At resonance the current is /in/
phase with the voltage, the capacitive and inductive reactance cancel
out so the circuit looks purely resistive.

If you like complex impedences (and adding a bit of series R &
using the EE jxj=-1 & w standing in for omega = 2 pi f)

XL=jwL
XC=1/jwC
Z=jwL+1/jwC+R

at resonance w=sqrt(1/LC)
Z=j( sqrt(1/LC)L-1/sqrt(1/LC)C )+R=j( sqrt(L/C)-sqrt(L/C) )+R=R
I=V/R

Peter did all that fancy math at uni, he can do the phase reversal in
his head - by attaching a pair of electrodes either side and passing the
whole meter current through it.


Hopefully he will?