P30_079 - 79. Using Eq. 30-22 and Eq. 30-19, we have |B1 |...

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79. Using Eq. 30-22 and Eq. 30-19, we have | ~ B 1 | = µ µ 0 i 2 πR 2 r 1 | ~ B 2 | = µ 0 i 2 πr 2 where r 1 =0 . 0040 m, | ~ B 1 | =2 . 8 × 10 4 T, r 2 =0 . 010 m and | ~ B 2 | =2 . 0 × 10 4 T. Point 2 is known to be external to the wire since | ~ B 2
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