ch28-p057 - b30 cmgb40 cmg = 6.0 10 cm , so = iA = b5.0 A...

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57. (a) The area of the loop is A == × 1 2 2 30 40 6 0 10 cm cm cm 2 bg ., s o µ × = iA 50 60 10 030 2 .. . . Am A m 22 c h (b) The torque on the loop is τµ θ
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