Question

Problem 3.63 3 of 16> Part A ReviewI Constants Find the resistance seen by the ideal voltage source in the circuit in the figure. (Figure 1) Express your answer with the appropriate units. Rab- 80.0 Ω Answe Figure of 1 Correct 1.5 Ω 20 Ω Part B 50Ω 30 0 100 Ω If vab equals 200 V, how much power is dissipated in the 31 S2 resistor? Express your answer with the appropriate units. Vab 71 2 31 2 80 2 60Ω 2012 40 2 pValue Units Submit Answers Request Answer

Answer 1

Using Delta - Y both Upper & Lower Delta R_1 = 50 times 50/50 + 50 + 100 = 12.5 R_2 = R_3 = 50 times 100/50 + 50 + 100 = 25 Ohm For lower R_a = R_c = 60 times 80/60 + 60 + 80 = 24 Ohm R_b = 60 times 60/8 + 60 + 60 = 18 Ohm \r\n R_eq = 1.5 + 12.5 + (120 Vertical-bar Vertical-bar 80) + 18 R_eq = 80 Ohm I = V_ab 80 = 240/80 = 2.5 A using current division I_2 = (25 + 71 + 24)/25 + 71 + 24 + 25 + 31 + 24 times 2.5 I_2 = 1.5 A P 31 Ohm = (1.5)^2 times 31 = 69.75 watt
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