ch26-p063 - 63. We use P = i2 R = i2L/A, or L/A = P/i2. (a)...

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63. We use P = i 2 R = i 2 ρ L / A , or L / A = P / i 2 . (a) The new values of L and A satisfy L A P i P i L A F H G I K J = F H G I K J = F H G I K J = F H G I K J new new old old 22 2 30 4 30 16 ρρ . Consequently, ( L / A ) new = 1.875( L / A ) old , and new new old old old 1.875 1.37 1.37 L LL L L
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