extra_exam2_s10

extra_exam2_s10 - Extra Problems for Exam II EE 313 Not to...

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Extra Problems for Exam II EE 313 Not to be turned in. 1. For the following circuits, determine the loads required to get maximum power transfer. Find the Thevenin equivalent circuit and attach the load. What is the maximum real power transferred? 2. A system consists of a single 60 Hz source with a voltage of 100 V rms connected to 3 loads, where: Z 1 absorbs 3kW at 0.45 lagging, Z 2 absorbs 12 80˚ kVA, and Z 3 absorbs 10kVAR at 0.4 lagging. a) What are the load impedances and the load currents? b) What is the total source current, I S ? c) What is the real power delivered by the source? d) What is the complex power absorbed by the 3 loads combined? e) What is the power factor of the three loads combined? f) To increase the power factor to 0.95 lagging, without changing the real power delivered or the source voltage, what must the component of the load be? g) What is the maximum reduction in source current allowed using a single compensating load?

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3. You are given a balanced 3-phase, balanced Y connected source connected to a balanced 3-
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This note was uploaded on 07/22/2011 for the course EE 313 taught by Professor English during the Fall '09 term at University of Alabama - Huntsville.

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extra_exam2_s10 - Extra Problems for Exam II EE 313 Not to...

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