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Engenharia Elétrica ·

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23) R1 = R2\n \n R1 = ρl / A1, k = ρl2 / A2\n \n l2 + l1 = A = πd1^2 / 4\n \n d1 = d2 / 2\n \n A = A1 \n A1 = πd1^2 / 4\n \n R = ρ L1 / A1\n A2 = A1R1\n \n R1 = R2 = ρL2 / A2\n \n ρA1R1 = kA2R2\n R1A1 = R2A2\n R1 = (R2A2 / A1)\n \n R1 = 2R1\n R1 = 2R2\n \n\n25) V = 250000.00\n V = 25X10^4 V \n P = -25X10^6 W / 2 = 5X10^6 J\n i = 200kA\n \n t = 1s\n \n\n26) P = 50W \n V = RI \n I = 10A\n P = TV \n 57 - 1 = V \n V = 50V\n \n\n27) R = 20Ω \n V = RI \n E = 20V \n I = 1.2\n i = 4.0M\n P: D.I.V \n P = 48W \n P = 32W \n P = 2E I^2 \n P = 2.4E \n P = 2.16 \n P = 32W