Midterm2_Spring2015 - EE310 Spring 2015 Midterm Exam 2...

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EE310 - Spring 2015 - Midterm Exam # 2 Wednesday, April 7 th , 10am - 10:50 am Instructions: This examination is closed book, closed notes. By signing this document, you are pledging to adhere to the honor system stating that all work performed here is strictly your own effort. Limited partial credit given for some problems. Check your answers carefully for arithmetic mistakes. Be sure to include appropriate units . Only one answer will be considered; more than one answer is automatically graded incorrect. Work on top of an erasure will be not be reconsidered for any reason after the exam is returned; circle and draw a line through work to be discarded. List all assumptions, show all work and clearly indicate your answer. Name __________________________________________________________ Signature ____________________________________________________ Prob 1: Power in Sinusoidal Circuits (4 + 4 + 3 + 4 = 15 pts) If v ( t ) = 160cos50 t V and i ( t ) = 20 sin(50 t 30 ° ) A, calculate a) the instantaneous power, b) the average power, c) the power factor (pf), d) the complex power S.
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