ch29-p009

ch29-p009 - 9(a BP1 = 0i1 2 r1 where i1 = 6.5 A and r1 = d1...

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9. (a) 1 01 1 /2 P B ir µ π = where i 1 = 6.5 A and r 1 = d 1 + d 2 = 0.75 cm + 1.5 cm = 2.25 cm, and 2 02 2 P B = where r 2 = d 2 = 1.5 cm. From B P 1 = B P 2 we get () 2 21 1 1.5 cm 6.5A 4.3A. 2.25 cm r ii r ⎛⎞ == = ⎜⎟ ⎝⎠
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