EEL 311C Test 3B - Test #3' EEL 31110 ' Spring 2005...

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Unformatted text preview: Test #3' EEL 31110 ' Spring 2005 mifltlteéziteye _______________________________________ _- Lest Nelne FiretName Section # {1) Answer an}; 2 of the following questions in the space provided. 5 {a} x.{t) and nfljt} are two einueoide of the same frequency [100 Hz). If mm leads. nfit} by 90", sketch the two sinusoide on the same graph. Assume phase angle of innit} to be zero. 7&1}.th :1 e. [0‘5 fwt~fiyfl a I *1 g 91.1}: W07- 5 (b) Show plteeor diagram of 1roltege and current in e capacitor. Let He be zero. _. WT = '0 2":— "I'm r: .L 1.. hi. "cl 5 {c} If the DC voltage gain of a low-pass filter 1'5 20 dB and cutoff frequency is 50 Hz, eketch the Bode plot and show the {13 values at 50 Hz, 500 He and 1,000 Hz. 53 {2} Answer any 5 of the following questions in the space provided. 2 (a) What is the significance of reactive power? 2 {h} For correcting power factor of an inductive load, where would you connect the capacitor and why? ' In EM' 2 {c} How do you define RIMS value of a eriodic function sit} with period. T? 2 {d} If apparent power in a capacitor is EDI-t‘r'r-‘t, what is the complex power“:I W 2 (e) A washer is rated for 120 V AC, 60 Hz, and 7.5 a. Can you predict its energy consumption in 24 hours of o peration’iI .J‘xiu, l 2 {15} State Theyenin's Theorem for AC circuits. In I. r, In WW 5.3 ‘52:: EH. VW W‘FEH’L lilo 9W W fl». Gt co LCM WM c—o * 2 (g) In an AC circuit containing scorces of different frequencies, which method is the only one that can be used to find current or voltage at any given location. [3} answer so},r 2 ot‘tlie following questions 111 the spnee promooo. it} (a) A nesistot and on intinetor ere eonneeted in parallel between tei'niinets A and B. Show that Em; is equivalent to impedance of a resistor in series with an inductor. 7'” H JLJLR Lhflhng“) 2:5,? Fla—Jest. CR—JWL’J L'L L W. Lil A“) L1.- .T-‘L RL-fifimi toL . : Erik) - if? [Lif— ml'trfii— L o If Ref? : QlFE’LULLL J {‘3' '— IpKLArmLi-if til (13] Find the frequency-tn where the magnitude {absolute value] of MR + jtoL} is CLTCIT. st line”; H \Qiijl‘ \i Pals-“'11:- LOL 2 9a W e 'F L it) {e} What is the cutoff frequency of the filter whose response function is given by H = VsuWin = MUS +ij) where A, B and C are positive constants? 2D (4]: Consider the following AC eireuit providing power to a variable load Z-L. :u Elm 3"“ rr-h m. PL, w; + UPC-rod fr Fifi: U :3 ox (2.§+J1):—3¢ '"J‘ ’7‘ re a e- _ie3o+Jii.13=}J we: MA 41931.1 N”- -- we ii, = MOW” : Mew CEKG-EQLI‘B'J 4 ___________—-—--————"—_—"—_" IPRINT FREQ vM{sN_uoov} W{$N_flll'fl‘n VElSN_flflllTJ VIflNJIlIM} 1.aoes+o4 4.sess+an Lemma 4.594E+ne Lssse+eo Faeo IMtvjatNszremI-anmitems-ammums-stem someone mess-es 1.729E+l11 uses-es messes 6 {a} Use the information given above to determine the equivalent impedance seen by the source. a, files: 4111‘} he“ a W 111,3 1.52., L iii-Q‘s H? 1II fl.— Till: 9- pm.} __1 7:11 1s: v. left-3s were]? E: 3,35% KT?1=; E—é‘va eel "“ “e “is SEBWR E: '3“ All-Ia: 5 Ella? L ' “E __,_ 15-1: 1 $3 (it? afihLlelE3h3-15)fl 35" if, 6 ' [b] What is the average power delivered by the source? fig L . P: PF-C 51am as I'rHe = ‘3’" 953.3"? 6‘ w 11 Pm 2—4.0“? WW '-". E [ejl Use the graph paper on the following page to carefully sketeh two eveles of the sinusoidal voltage and earrth of the source. gee} 3.11:? est; c enezetOH-e 7w . _. e a, {5 Les: Wefl” “$659M {6} A 24e-vm source is delivering Ek‘v'i’tli in a lead with a lagging. power t‘tteter of HEW. 5 {51} Find the eemplex pewer delivered by the source. ' ——l E? QB gtevee QFQfiflrqfi’?-‘e4§ ‘ ,J' P :2: 5m: E: @"fijgj MVP“ ill] {th What is the load impedance? 't’eu Ittttst eireie either the pesitive or negative sign. Lg} £1" a”? i L . 3—: (Ma) : {CL-'5. awe)!!— (5-135)? ICE) 2:;WgeJeer 5 {e} What is the RMS eurrertt delivered by the seuree? 1Jde m iii-WIS: 7:1— QHQJE e-n H "4-639 {5! LAMS—l i: :— ‘115‘5 p! fume W ...
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EEL 311C Test 3B - Test #3' EEL 31110 ' Spring 2005...

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