P31_104 - 104. The magnetic ux B through the loop is given...

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104. The magnetic flux Φ B through the loop is given by Φ B =2 B ( πr 2 / 2)(cos 45 )= 2 B/ 2. Thus E = d Φ B dt = d dt µ 2 B 2 = 2 2 µ B t = π (3 . 7 × 10 2 m) 2 2 µ 0 76 × 10 3 T 4 . 5 × 10 3 s =5 .
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