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# Mathcad - 04-04 - Solution Since we have voltage and...

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reluct 5.495 10 3 × coul 2 kg -1 m -2 = (e) reluct length μ A c = relperm 2.897 10 3 × = relperm μ μ 0 = μ 3.64 10 3 - × kg mcoul -2 = μ B H = μ 0 4 π 10 7 - henry m = (d) Flux 0.065 weber = Flux B A c = (c) (approximately) B 0.65 tesla = from B-H curve (b) H 178.571coulm -1 sec -1 = (a) H MMF length = MMF 357.143amp = MMF N I = I 3.571amp = I V R = Solution: length 2.0 m = R 56 ohm = Given: A c 0.1 m 2 = N 100 = V 200 volt = Given: Problem 4-4:
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Unformatted text preview: Solution Since we have voltage and resistance for coil, can find current (and MMF). Field intensity follows directly. B can be found from B-H curve once H is known. Flux is BA. Other requested quantities are found from appropriate equations....
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