BEMF current reversal.

[Allen Burgess]

That is not "Negative Henry". It is inverse henry.

That is a fundamental difference.

Also, you continue to confuse the variables (symbols representing the physical quantities) with the units (used to define the measurement system).

@bistander,

O.K. tell me now: What's your "Inverse Henry" equal to?

"A negative correlation means that there is an inverse relationship between two variables".

[Allen Burgess]

@bistander,

"Reduced to base SI units, one ohm is the equivalent of one kilogram meter squared per second cubed per ampere squared (1 kg times m 2 · s -3 · A -2 . The ohm is also the equivalent of a volt per ampere (V/A)".

So we see above that one Ohm is equal to (V/A).

Now what's your "Inverse Henry" equal to?

Reluctance is to (-H) as Resistance is to Ohms. You're all kinds of confused by this (-H) factor right?

"A negative correlation means that there is an inverse relationship between two variables".

[bistander]

Easy one

@bistander,

O.K. tell me now: What's your "Inverse Henry" equal to?

Seconds squared Amperes squared over kilograms meters squared.

or

Amperes /(Volts * seconds)

[Allen Burgess]

Seconds squared Amperes squared over kilograms meters squared.

or

Amperes /(Volts * seconds)

@bistander,

Those are merely aggregate units that are empty of any value. Look at the reluctance schematic. You'll find two inductors where the resistors appear in the adjacent diagram. Let's say we place our two inductance meter electrodes across each wire of one inductor and measure ".04 Negative Micro-Henries". Negative, because the minus sign shows up in the readout window of the inductance meter. What's that value indicate?

[bistander]

@bistander,

Those are merely aggregate units that are empty of any value. Look at the reluctance schematic. You'll find two inductors where the resistors appear in the adjacent diagram. Let's say we place our two inductance meter electrodes across each wire of one inductor and measure ".04 Negative Micro-Henries". Negative, because the minus sign shows up in the readout window of the inductance meter. What's that value indicate?

Q: What's that value indicate?

A: Cheap meter.

[Allen Burgess]

Q: What's that value indicate?

A: Cheap meter.

@bistander,

Very funny!

1-H=1T

-.04 microhenry = -4 x 10-8 henry.

One Tesla=10,000 Gauss

400,000,000 divided into 10,000

Answer: .000025 Gauss. That's the strength of the magnetic field in the inductor, and the amount of reluctance in the inductor, which is the equivalent of Ohmic resistance only to a changing current.

Everyone knows an inductor acts as a conductor to a straight D.C. current, that's why we find the reluctance formula used more frequently with A.C. current.

[bistander]

1-H=1T

That is ridiculous.

[Allen Burgess]

Ridicule

That is ridiculous.

@bistander,

You can shoot your "Inductance Meter".

[bistander]

One of those re...ance words

@bistander,

Very funny!

1-H=1T

-.04 microhenry = -4 x 10-8 henry.

One Tesla=10,000 Gauss

400,000,000 divided into 10,000

Answer: .000025 Gauss. That's the strength of the magnetic field in the inductor, and the amount of reluctance in the inductor, which is the equivalent of Ohmic resistance only to a changing current.

Everyone knows an inductor acts as a conductor to a straight D.C. current, that's why we find the reluctance formula used more frequently with A.C. current.

we find the reluctance formula used more frequently with A.C. current.

Maybe you have reluctance confused with reactance.

[Allen Burgess]

Reluctance and Reactance.

"Magnetic reluctance, or magnetic resistance, is a concept used in the analysis of magnetic circuits. It is analogous to resistance in an electrical circuit, but rather than dissipating electric energy it stores magnetic energy. In likeness to the way an electric field causes an electric current to follow the path of least resistance, a magnetic field causes magnetic flux to follow the path of least magnetic reluctance. It is a scalar, extensive quantity, akin to electrical resistance. The unit for magnetic reluctance is inverse henry, H−1".

"In electrical and electronic systems, reactance is the opposition of a circuit element to a change in current or voltage, due to that element's inductance or capacitance. The notion of reactance is similar to electrical resistance, but it differs in several respects. In phasor analysis, reactance is used to compute amplitude and phase changes of sinusoidal alternating current going through a circuit element. It is denoted by the symbol X {\displaystyle \scriptstyle {X}} \scriptstyle {X}. An ideal resistor has zero reactance, whereas ideal inductors and capacitors have zero resistance – that is, respond to current only by reactance. The magnitude of the reactance of an inductor rises in proportion to a rise in frequency, while the magnitude of the reactance of a capacitor decreases in proportion to a rise in frequency. As frequency goes up, inductive reactance goes up and capacitive reactance goes down".


Remember our H and B field: The H field involves electrical terms and reactance is similar to electrical resistance, that leaves the B field, magnetic resistance or reluctance.

Magnetic reluctance is directly proportional to the maqnetic field strength in the inductor. This is measured in inverse Henries as Teslas or x 10000 as units of Gauss.

The magnitude of "Electrical Reactance" rises in direct proportion to the frequency in an inductor, and drops in inverse proportion to the increased frequency in a capacitor.

"As frequency goes up, inductive reactance goes up and capacitive reactance goes down".

Reluctance rises in direct proportion to the magnetic field of the inductor. Just like Resistance does when Ohmic resistance is added to the circuit..

[Allen Burgess]

Negative Henries.

@bistander,

What you and Tinselkoala don't seem to understand is that when your Inductance meter reads -1 Henry, that's an inverse Henry! It's no longer measuring inductance but has changed to a magnet meter reading field strength in Tesla/Gauss.

[bistander]

...

Magnetic reluctance is directly proportional to the maqnetic field strength in the inductor. This is measured in inverse Henries as Teslas or x 10000 as units of Gauss.

...

Reluctance rises in direct proportion to the magnetic field of the inductor. Just like Resistance does when Ohmic resistance is added to the circuit..

Magnetic reluctance is directly proportional to the maqnetic field strength in the inductor.

That is contrary to what the university fellow stated in that slide which you posted earlier today.



This is similar (analogous) to the resistance of a piece of carbon in an electric circuit. The ohmic value (resistance) of the resistor (piece of carbon) depends on the material characteristics (resistivity), size, and temperature, not the current.

[bistander]

Magnet meter?

@bistander,

What you and Tinselkoala don't seem to understand is that when your Inductance meter reads -1 Henry, that's an inverse Henry! It's no longer measuring inductance but has changed to a magnet meter reading field strength in Tesla/Gauss.

Magnet meter? I did a quick search. Google didn't show any such thing, but there was an app for your smart phone.

Where in the world did you learn that your inductance meter turns into a magnet meter?

[Allen Burgess]

That is contrary to what the university fellow stated in that slide which you posted earlier today.



This is similar (analogous) to the resistance of a piece of carbon in an electric circuit. The ohmic value (resistance) of the resistor (piece of carbon) depends on the material characteristics (resistivity), size, and temperature, not the current.

@bistander,

If you can't recognize the "Inductance Meter" reading of Henries with a minus sign before it as the very same "Inverse Henry" you're trying to teach me about, all hope is lost. You go on teaching that the "Inverse Henry" is something else, but just exactly what you can't figure out!

Reluctance has the same relationship to number of "Inverse Henries" as resistance has to number of Ohms.

The stronger the magnetic field in an Inductor, the harder it is for a fluctuating current to pass; Hence the higher the reluctance. The coil would act as a conductor for a straight D.C. current.

[bistander]

One of those re...ance words

@bistander,

If you can't recognize the "Inductance Meter" reading of Henries with a minus sign before it as the very same "Inverse Henry" you're trying to teach me about, all hope is lost. You go on teaching that the "Inverse Henry" is something else, but just exactly what you can't figure out!

Reluctance has the same relationship to number of "Inverse Henries" as resistance has to number of Ohms.

The stronger the magnetic field in an Inductor, the harder it is for a fluctuating current to pass; Hence the higher the reluctance. The coil would act as a conductor for a straight D.C. current.

Still don't know the difference between reluctance and reactance, do you?