test1_spring09 - ECE 3041 Lecture Exam No. 1 Spring 2009...

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Unformatted text preview: ECE 3041 Lecture Exam No. 1 Spring 2009 FRIDAY FEBRUARY 13 4 PM STUDENT GTID No. ~— N ame I H Instructions. Totally Closed Book and Note. Calculator Permitted. Four Equally Weighted Problems. All Work Must Be Shown for Credit. 1. Determine the percentage error due to dc ammeter loading in the measurement of the dc current II in the circuit shown below. The ammeter has an internal resistance or input impedance of 7.3 Q. As an intermediate step in the solution determine the Thévenin equivalent circuit with respect to the ammeter. 150 O Edh- QNL—aaoJre go ‘ Zo +3o +15 +13 19+zo {401-15 _‘19 Lo+l8+l§ 4%? = 76.S§fl/w‘\/ 30 +l5 +I? +10 Rm :12 + 30m: 20+)? +15] :. 37’157Jl I , ~ :—/é,y22, WOW/Mr—Méfi Riki-Ram 5‘ Eth : q é ; 6 m V 7 A ' Rm 2 3:7. 2 R f % error = more : Jere o q 2. Determine the percentage error due to dc voltmeter loading in the measurement of the dc voltage VAA/ in the circuit shown below. The dc voltmeter is a Simpson Meter Model 260—7’set to the range just larger than the Thévenin voltage with respect the voltmeter. The available ranges for the Simpson meter are 1V, 2.5 V, 10 V, 50 V, 250V 500 V, and 1, 000 V. As an intermediate step in the solution determine the Thévenin equivalent Circuit with respect to the meter. 16 rm? 3i... '77 75 Em: _ ‘2 $l1~61f3l+77+75 75 + H9 H7+6Hs +si+7$ 3HC51+75+47> 7S : 58,57/V -10 6+3Hc51+75+tt73 sl+7S+AH .. %Z,sg7,0252_ Rm = 7s/[E51+6[13+‘/7J - ._ S V S :. 250V Zwselwaéz Rm 3 4 or $3 70 W 1 “"ga W a?» 5 E‘ch Sgaév W 5 Rth: HZ‘ S %err0r== “Orgiqo 107% 2 3. Determine the percentage error due to ac voltmeter loading in the measurement of the rms magnitude of the ac voltage VAA/ in the circuit shown below. The ac voltmeter is a Simpson "Meter Model 260—7 set to the range just larger than the Thévenin voltage with re- spect to the voltmeter. The available ranges for the Simpson meter are 1 V, 2.5 V, 10 V, 250 V7 500 V, and 1. 000V. The voltage source is e(t) = 40x5 cos wt V where f = 4kHz. As an intermediate step in the solution determine the Thévenin equivalent circuit with respect to the meter. Use rms phasors to solve the problem. Express complex results in polar form and angles in degrees. 1 _, :-7,7SS‘}; —— [m W e 1%.; 5 Em: am (.127? v _7 5 —th: __ 22'? ejifi. 5 %er7‘0r= ‘7. 6.16» Z, _> _ 4. Indicate with an F (floating) or G (grounded) whether the following laboratory in— struments input or output connectors are floating or grounded with respect to the ac power line ground " " l: Agilent 34401A Digital Multimeter Hewlett Packard 3311A Function Generator Fluke 73 Hand Held Digital Multimeter ___G__Tektronix 3012B Oscilloscope 0% l w LAgilent 3630A Triple Output dc Power Supply ____l._Agilent 33220A Function Generator/ Arbitrary Waveform Generator iSimpson Model 260—7 Multimeter —lFluke/ Philips 6303 LCR Meter T names of the three wires connected to a standard 1&0 Volt AC outlet are the __..__._.___ wire which is covered with colored insula— tion, the wire which is covered with ___.—Wcolored insulation, and the which is covered with _%AXQQA—_colored insulation. W 511%} 4 ...
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This note was uploaded on 01/17/2011 for the course ECE 3040 taught by Professor Hamblen during the Fall '07 term at Georgia Institute of Technology.

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test1_spring09 - ECE 3041 Lecture Exam No. 1 Spring 2009...

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