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For questions that utilize the concept of magnetic fields (commonly denoted by the letter B), or for questions whose answers likely involve magnetic fields. More specific than the [magnetism] tag, as questions about the phenomenon & theory of magnetism do not necessarily involve the discussion of fields.

2 votes
2 answers
276 views

How is the magnetic flux density inside a current tube affected by an inner wire?

Background to problem Conventional wisdom informs that the magnetic flux density inside a tube carrying current is zero everywhere. Pictorially this is represented by this finite element analysis (co …
Andy aka's user avatar
  • 256
1 vote

Resulting magnetic flux in the core of a transformer

The currents you mention (I1 and I2) are due to the load on the secondary and these currents produce equal and opposite magneto motive forces. This means that the magnetic fluxes cancel (as you quite …
Andy aka's user avatar
  • 256
1 vote

Reluctance of torus shaped iron core with embedded wire loop

Reluctance = $\dfrac{l_e}{\mu A_e}$ where..... mu is the absolute permeability of the material, $\mu_0 \mu_r $ $l_e$ is the circumference of a circle at a radius r and $A_e$ is a small cross section …
Andy aka's user avatar
  • 256
0 votes

How is the magnetic flux density inside a current tube affected by an inner wire?

However, there is one small "anomaly" and that is that QF reports that the core voltage is 96.3 volts. The lack of magnetic flux between the shield and the inner core is a red herring. Reason: …
Andy aka's user avatar
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