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ch26_p56 - 56(a Since P = i2 R = J 2 A2 R the current...

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56. (a) Since P = i 2 R = J 2 A 2 R , the current density is J A P RA P LA P LA == = = ×⋅ × × −− 11 10 2 0 10 50 10 13 10 52 3 2 ρρ / . .. W 3.5 10 m m m A/m πΩ c hc h (b) From P = iV = JAV
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