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# [A few questions]

- To: femm@yahoogroups.com
- Subject: [A few questions]
- From: "you se-ho" <sxy28@hotmail.com>
- Date: Mon, 06 Aug 2001 00:28:09
- Bcc:

`
To Dear All:`
`How are you? I have a few questions.`
`(1) In the manual, denominator in equation (44) should be r^(n+1). It is obvious mistake, but it did not change from previous manual. The thing I wanted to ask is
How I can use the mixed boundary condition. If I check the axi1.fem file, the c0 coefficient is 6962160. Is this from (1/(mu_0*4.5 inch * 0.0254) ? I would like to make sure that I know correctly. If the problem is the planar in rectangular coordinate, Can I still use same equation (from the center of area of interest to most outside boundary) ?`
`The thing that I really want to ask is that in the manual it said when n=1, the objects in the solution region look like a dipole when view from a long distance. I would like to more explanation for this.`
`(2) In the manual, it says resistive losses from i^2*R. I think it should be 0.5*I^2*R. Nevertheless, I think FEMM gives correct value.`
`(3) In the layout, if I choose entire domain with " define area over which integration performed", and calculate A dot J integration. Should it be same as magnetic field energy ?`

    Thank you very much.
    Sincerely,
    SE-HO YOU

``

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