P30_010 - i/ 4 R to the feld at C . The right-hand rule...

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10. (a) Recalling the straight sections discussion in Sample Problem 30-1, we see that the current in the straight segments colinear with C do not contribute to the feld at that point. (b) Eq. 30-11 (with φ = π ) indicates that the current in the semicircular arc contributes
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Unformatted text preview: i/ 4 R to the feld at C . The right-hand rule shows that this feld is into the page. (c) The contributions From parts (a) and (b) sum to ~ B = i 4 R into the page ....
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