@nelsonrochaa,

Thanks for the clarification. Consider this:


"Ørsted discovered the connection between magnetism and electric current when a magnetic field produced by a current-carrying copper bar deflected a magnetised needle during a lecture demonstration".


"In the CGS system, the unit of the H-field is the oersted and the unit of the B‑field is the gauss. In the SI system, the unit ampere per meter (A/m), which is equivalent to newton/weber, is used for the H‑field and the unit of tesla is used for the B‑field".

"H is measured in units of amperes per meter (symbol: A⋅m−1 or A/m) in the SI. B is measured in teslas (symbol: T)".


This is what you need to understand: The H field is an electrical equivalent and the B field a magnetic one.

Coulomb's "Law of magnetics" helped couple the "Oersted" as a measure of electrical current H field, with the Gauss B field, a measure of magnetic strength. This is the base equivalency unit of Joseph Henries formula.

Quote from: nelsonrochaa on April 19, 2017, 08:49:25 AM

I think that exist a misunderstood or a fault of communication about this subject . Watt and Wh have different definitions .

A watt (W) is a unit of power, and power is the rate at which energy (joules) is produced or consumed in a second .

A watt-hour (Wh) is a unit of energy; it's a way to measure the amount of work performed or generated  in one hour
joules X time 3600S =Wh   

watt-hours measure amounts of energy for the specific period of time of one hour, and watts measure rates of power at a moment in time.

Just to clarify

Nelson Rocha

Hey nelson

From your description it would seem they are the same as in a measurement in time, where one is over the period of an hour but the other is over the period of 1 second.

Like there may be special reasoning for using one or the other where the Wh there may be many ups and downs and it gives us an average use over the hour time period and the W would more than likely be a more consistent power usage over the period of 1 sec. But it seems more like the same measurement, just one is kilograms and the other is just grams in analogy to time as in hour and 1 sec where they both are just scaled for sake of making numbers smaller like 1Mw or saying 1,000,000w.  or having to say 1/60 of an hour instead of 1 sec.

So it seems you could interchange the Wh and W in some formula just the ref to time of each would be the end result.

Mags

Quote from: Magluvin on April 19, 2017, 09:26:51 AM
Hey nelson

From your description it would seem they are the same as in a measurement in time, where one is over the period of an hour but the other is over the period of 1 second.

Like there may be special reasoning for using one or the other where the Wh there may be many ups and downs and it gives us an average use over the hour time period and the W would more than likely be a more consistent power usage over the period of 1 sec. But it seems more like the same measurement, just one is kilograms and the other is just grams in analogy to time as in hour and 1 sec where they both are just scaled for sake of making numbers smaller like 1Mw or saying 1,000,000w.  or having to say 1/60 of an hour instead of 1 sec.

So it seems you could interchange the Wh and W in some formula just the ref to time of each would be the end result.

Mags

@Mags,

Exactly! Same SI units.

                                                          1 Gauss ≒ 1 Oersted.

  Factor that into your "Dervish Account"!