EEL 311C Test 3A - Test # -3 EEL 3111C Fall can? Dr‘s....

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Unformatted text preview: Test # -3 EEL 3111C Fall can? Dr‘s. Srivastava a Jordan __§___85_En_§rmva __________________________ __ - _______________ _- Last Name First Name Section ti {1} Ansvfir each of the following questions in the space provided. 5 {a} Given: v = (2a Ham v, 1 = [12 +jfi) a, s = (42o +j24t'l) tot. Which: of the above quantifies are phasors‘i‘ Give their phase angles. 5 {b} What is the physical significance of reactive power? 9% latitude/l. sewage +0 M jwm 5 (c) Given two sinusoids v1{t) = lficosfilflflflnt + 3'3”) V and v20) = EflsinUflDD-nt - 3D”) V, by hov-r many seconds does vr lead v2? 9 : 5o”! '9 :_ —~33"—q5 =_-"l1" b t 2- u, 5 (d) What is the equivalent impedance of an inductor in parallel with a capacitoi‘ at the resonance freepaencviF (L M r-L . a. 3 2L “2.; La {2} Consider the network with a (iii-Hz voltage source shown below. 10 (a) Assume ZL = 3D 5.1. Find the equivalent admittance ch seen by the source. IGive your answer in the rectangular form. m .... I, :‘5c3+(I—tei' a +— JBE ‘1ch: 2,”; it} {is} Let EL = {33 +j}{g_} {2. For what value ofXL will-LITE current is be in pliant.“ with V5? . I l l —- + _ + ————— :e 3:1“ J35” "J15? 30+J><LE - .3 .J ._ %{“§E+ss+ L “i =0 “tenor-EVIL X __._ .L +j—q-— L 11C:- E’JG 2C? C1ea+§<L '1. chc; 4— :2. 6C} XL. 36; :— BGJL L. 5 (c) From the result of part [b], can you conclude iFZl. is inductive or capacitive? Now find the corresponding inductance or capacitance. IM'Jdefix’ve. L; L : ¥W5fiami .LTTECP ' 2 [3] Shown below is anp‘C circuit in fl'equene}.r domain. J 2 {3 V lie You are asked to use an}r method to find the current phasor 15. 5 {a} State briefly whieh method you chose and why"? Sonar-ca Tmhfi’fiYWQ/EI;MS 41> “HIT; dam cmbicgenfldiygfl 5 [h] Write all the independent equations you need and number eaeh one Df-thfii'fl. Do not simplify them in this part. (326* lwlv) = Q? +J 109—”— C'Pd‘Jicefl 2a.) :_ Q_o_—_)ta)_s'r-_ Glen 12—9) : Q0 some Qt“) Pt H (isejiu)JL::2 Qaéoflvfic CI‘EFJiU}J-jl it] {e} Solve the above equations and find 1;. eowsmusn ...... -- _ 5 {:1} G0 back tn the original aircnit and using the results of part {a}, find [a by applying the current divider formula at-Tl‘ie upper nude. ' M ' “J29? 1;: W W >i wad] m I“: (p,§-Jo.5)rfli {4} A MCI—V [rrnsj ED-I-Iz source provides power to three loads connected in parallel. Load 1: HS EVA @ 0.6 of (logging) Load 2; 24 kw @os pf{[eading} 61 Load 3: 3t) HEAR @133 pf (lagging): ? ID [a] Find the tots! complex power provided by the source. (Hint: Use powcr triangle) ow: Car‘sezsaw P . —-‘1 D 5' : '1‘ .‘J‘. i‘iufi 8,1: “TUS- 3*%: _36’g?? '2 ' {Ex-S93. 5C) 93 1".1 CfiJ‘GEC-‘t :1 lFrEi-i/ Q :Gg’gakwfi 3 she} (1...— W co a 9 7:1. l+ +5 : iEASst-i- 3c? 46%»334- t 2’ 3’ 633542.939 . A GER-Ilka at :Gs,s§+32cs) w Jim also"? It] (in) Find the load impedérricc {in rectangular form} and pf seen by Lhe source. 2.. N \f mac ' '21 is “i- 8: fliwjgg: 'LQ-Bf or % 2' Qaarfiozimfifi ("L E z 0, gear? 4+ iii-$75931- egoses 4—) amt/L341: 5 {c} Suppose a capacitor is connected in pamliet with the loads to bring the power factor to Lt]. What would be the new RMS current In", in the source? P: \ims 1M U) 1 .. fiafiwis ,. g,qu AME lqg U1 ...
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This note was uploaded on 08/28/2010 for the course EEL 3111C taught by Professor Srivastava during the Spring '08 term at University of Florida.

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EEL 311C Test 3A - Test # -3 EEL 3111C Fall can? Dr‘s....

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