Originally posted by Aaron
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magnetic coupling with another L "secondary" which is providing energy to a
load the oscillations I think would be less than an LC "uncoupled to a load"
as more load is added more energy taken from the LC and more energy needs
to be provided as well as the losses overcome.
Only an uncoupled (very loosely coupled) or unloaded LC will oscillate freely I
think.
I never said the ball is giving you useful work to power lights, etc... but
the point is - how much work is demonstrated in measurable joules of
energy and if you add it all up, is it more than we put in? In a bouncing
ball, the intended work is to have a ball that bounces. That is very useful
work for a ball that is intended to bounce.
the point is - how much work is demonstrated in measurable joules of
energy and if you add it all up, is it more than we put in? In a bouncing
ball, the intended work is to have a ball that bounces. That is very useful
work for a ball that is intended to bounce.
or ideal ball bouncing which returned to it's original height.
You seem to be comparing it to a ball that does not bounce and dissipates all it's
energy with one impact.
The term "useful" is subjective and only applies to what we personally want
work for and has nothing to do with the fact that other work could be
happening.
An incandescent bulb is 10% efficient - we only say that because it gives
us 10% light and 90% heat so the efficiency is 10%. The useful work
we WANT is light so it is 10%. But the fact is that it is 100% efficient
because we get 10% light and 90% heat. Whether or not we want the
heat is irrelevant - 100% of the input we put into the bulb is converted
to work and work is work measurable in joules of energy.
If it is a resistive heating element that gives no light, it is 100% efficient
because the useful work we WANT is heat - therefore all of the power
we put in is converted to heat, then it is 100% efficient.
work for and has nothing to do with the fact that other work could be
happening.
An incandescent bulb is 10% efficient - we only say that because it gives
us 10% light and 90% heat so the efficiency is 10%. The useful work
we WANT is light so it is 10%. But the fact is that it is 100% efficient
because we get 10% light and 90% heat. Whether or not we want the
heat is irrelevant - 100% of the input we put into the bulb is converted
to work and work is work measurable in joules of energy.
If it is a resistive heating element that gives no light, it is 100% efficient
because the useful work we WANT is heat - therefore all of the power
we put in is converted to heat, then it is 100% efficient.
I have no use for heat from a light bulb so it is a loss.
But of course in a resistive heating element (non inductive), there is no
rebounding, resonance, bouncing back, etc... it is a straight short circuit
that has no chance for recovery. I know an incandescent bulb filament
is an inductive resistors but for all practical purposes, we're not getting
any recovery and it might as well be a straight wire resistor.
rebounding, resonance, bouncing back, etc... it is a straight short circuit
that has no chance for recovery. I know an incandescent bulb filament
is an inductive resistors but for all practical purposes, we're not getting
any recovery and it might as well be a straight wire resistor.
one part of a system.
I don't want to comment on the Ainslie circuit because I'm not familiar with it.
Cheers.
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