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27. A wire with a length of 150 m and a radius of 0.30 mm carries a current with a uniform current density of 2.8x107 A/m2. T
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(27) 1o x 7 x (0. 3 x lo-3 )² = 2.8 x ).3 N lo A Anowar (C) V= Ix R (28 ) 0 •25 x 60 Awmer (B)

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