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Unformatted text preview: Physics 21 Fall, 2009 Solution to Hour Exam #2 If you want to discuss the grading, you must speak with the grader by Nov. 20. 1: Beels 2: Malenda 3: Belony 4 and 5: Drake Problem 1. For the following circuit (a) (5 pts.) Write the loop equation for this circuit. (b) (5 pts.) If R = 250 , L = 800 mH, C = 8 . 00 F, and = 500 rad / s, draw a phasor diagram for this circuit that is approximately to scale. In- clude a phasor for the ac voltage V , and give the length of each phasor. Find the peak value of the current I if the peak voltage supplied by the power supply is 8 . 00 V. (c) (5 pts.) For the parameters given in part (c), find the phase angle and the average power delivered to the circuit by the power supply. (d) (5 pts.) If the voltage supplied by the power sup- ply is constant, for what frequency will the cur- rent in the circuit be the maximum? Problem 2. A long, straight wire lies along the y axis and carries a current 4.00 A in the + y direction. In addition to the magnetic field due to the current in...
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- Spring '08