313_excredit_2 - EE 313 - Extra Credit II Fall 2010 You...

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EE 313 - Extra Credit II Fall 2010 You must show your work to receive credit 1. [2 points] Consider the following circuit: 1ohm 4 V X + - + - 1ohm j1 ohms -j1 ohms 24 0 o V + V X - 1 ohm What is the total complex power delivered by each source? 24 0º delivers ________________ 4 V X delivers _________________ What is the real power absorbed by the left-most 1 ohm resistor and the j1 ohm inductor? 1 ohm absorbs ________________ j1 ohm absorbs _________________ 2. [3 points] Consider the following single phase circuit: + _ Z 1 Z 3 Z 2 V S I S I 1 I 2 I 3 Load 1 – 10kVA at PF=.6 lagging Load 2 – 10kW at PF = 1 Load 3 – -6kVAR at PF=.2 leading a) Find the total complex power delivered by the source. S = __________________ S b) What is the source current magnitude? I S = __________________ c) Can the source current magnitude be reduced by 50% (circle) yes or no without changing the real power delivered or the source voltage magnitude? What will the power factor of the source be? PF S ______________
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3. [3 points] You are given a balanced three phase Y-connected source where V
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313_excredit_2 - EE 313 - Extra Credit II Fall 2010 You...

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