MH's ideal coil and voltage question

[hoptoad]

Brad:

How about just fixing this comment of yours:

<<< Yea--good one MH--only we do not have a loop,we have a coil attached to a voltage supply.  >>>

Can you do that?

MileHIgh

Yes, I do agree, that is a bit of a misnomer by Brad which he should acknowledge. Any load on a power supply of any sort (including a battery) that results in a current flow, be it a single wire or a coil across the terminals will create a full current loop within the supply and load.

Interestingly, a simple resistor connected directly across the battery will have the same voltage readings across it as the battery it is connected to and could be considered in parallel with the battery voltage, but the current from the battery through the resistor back into the battery is considered as taking a series path.

Cheers

[picowatt]

Quick setup showing the EMF and CEMF in a DC motor in real time,as a load is applied.

https://www.youtube.com/watch?v=SqPur5JUumg


Brad

Tinman,

I have always preferred using counter-EMF (CEMF) with regard to inductors and back-EMF (BEMF) with regard to the action of motors.  If used interchangeably, one must be sure to indicate which action is being referred to within the context of its usage. 

From the following Wiki:

https://en.wikipedia.org/wiki/Counter-electromotive_force

The term back electromotive force, or just back-EMF, is most commonly used to refer to the voltage that occurs in electric motors where there is relative motion between the armature of the motor and the magnetic field from the motor's field magnets, or windings. From Faraday's law, the voltage is proportional to the magnetic field, length of wire in the armature, and the speed of the motor. This effect is not due to the motor's inductance and is a completely separate effect.

PW

[ramset]

Miles
absolutely lives for the "out of context" examples where the subject matter is self evident and profoundly obvious
but the ambiguity can be greatly enhanced and his EGO even more so if he can take twenty pages or more to show just how important he really is around here.

Miles has indeed formed a semantic EGO loop with several "Impotent feeds" to draw from...
this will truly Loop in perpetuity and most likely many more good Members will "CLICK"
their way out of this Forum [as Miles stamps errr Clicks another X for job well done .

Miles
Quote
"Can't wait to put an end to this once and for all"

oh,   and Miles will be holding a spelling class next Tuesday
so we can do a better job on the OU Bench.....

[MileHigh]

Like I already said Chet, I think it's really all about you stroking your own ego up and down and up and down to get some good resonant motion going.

[ramset]

Miles
forgot to mention
I have to cancel on your Thursday night "folding your way to a better OU experimenter"
napkin folding class .

Yes ..
resonance was sooo misunderstood until you came along...
completely changed the way we do things around here...
Sooo helpful and informative !

I am signing up for your "Tying your way to a better OU Bench"
shoelace class for certain....