311HW_1 - 1 Paul Gonzales BME 311 Network Theory Inst:...

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1 Paul Gonzales Inst: Zhang BME 311 Network Theory Homework #1 Date: January 31, 2011 1. Basic Problems (30 points) Solve the following three problems from the textbook 1.5, 1.8 and 1.22 1.5) Determine the total charge transferred over time interval of 0=<t=<10 s when i(t) = 1/2t A Q = i dt = 0 10 1 2 t dt = 0 10 t 2 4 0 10 = 25 C 1.8) The current flowing past a pt. in a device is shown in Fig. 1.25. Calculate the total charge through the point. Q = (10 x 1)/2 + (10 x 1) = 15 µC 1.22) A lightning bolt strikes an airplane with 30 kA for 2 ms. How many coulombs of charge are deposited on the plane? Q = i*t = 30 x 1000 x (2 x .001) = 60 C 2. Comprehensive Problem (20 points) Solve the following problem from the textbook: 1.35 1.35) The graph represents the power drawn by an industrial plant between 8 – 8:30 AM. Calculate the total energy in MWh consumed by the plant. [ (5x5) + (4x5) + (3x5) + (8x5) + (4x10) ]/ 60 = 2.333 MWhr
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311HW_1 - 1 Paul Gonzales BME 311 Network Theory Inst:...

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