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Page 1 L5v L tJ T L 61V S 7 14 LL ~l ELTECH 113 Lecture (Ouiz #2, Take-Home) Due Date : Monday, 9-9-2002 (5 :30 pm) Instructor : Bret Allen Instructions : Complete each of the following by selecting the best possible answer . (32) multiple choice questions 1. A series circuit has : only one current path . two current paths c . more than two current paths d . the same voltage across every component 2 . What is the effect on total current if the voltage supplying a circuit is halved, and the circuit resistance stays the same? a . it goes to zero == V/,e it decreases by half c . it doubles ~ C -_j_ ` VS. .S~ d . it rema i ns the same 3 . Current in a series circuit is always : a . zero the same through each component ,° c . different through each component d . different if the components are different 4 . If a powered series circuit has a 50 ohm resistor current is 0 .5 A, what is the current flow through the other resistor_? --,1~ 0 . 5 A 91 b . 2 .5 A c. 5 A / 0-f-292. d . 10 A 5. The total resistance of a series circuit is equal to : a . the average of all the resistance values the sum of all the resistance values c . the smallest resistance value d . the largest resistance value 6. If R1 = 20 ohms, R2 = 30 ohms, and R3 = 40 ohms, what is the total series resistance? a . 2 0 ohms b . 3 0 ohms .: o7 0 T c . 40 ohms d©. 9 0 ohms ....~ ELTECH 113 Lecture 3 (Quiz #2) Page 2 7. If is a. b. R1 = 5 k ohms, R2 = 1 .5 k ohms, R3 = 200 ohms, and R4 = 1 k ohm, what the total series resistance? 77 ohms -t- .?oo t Ivov _- 7 7 ov~ = Svoo t l~ 5ao 207 .7 ohms T -.jo,O 7 .7 k ohms 7, 7 d . 207 .5 k ohms 8. What is the total current of a series circuit consisting of a 24 V battery, and a 6 and 10 ohm resistor? 1 .5 A ,' c. 4 A d . 6 .4 A 9. /4 -2. 4T- If 60 V supplies a series circuit consisting of a 20 and a 10 ohm resistor, what will be the current passing through the 10 ohm resistor? a . 1 .67 A c. 6 A d. 9 A ,~ s _ . 40V = aA 3 a,~.. l~TaTA~ 10 . What is the total current of a series circuit with a 9V battery, a 4 .7 k ohm resistor, a 6 .1 k ohm resistor, and a 450 ohm resistor? J 800 ~LA VS ~,..: .~,~ .~ _. .. b . 1 . 9 mA .'y~cro1 c . 2 0 mA 6~tDD,f" ~Y,?vo~fd . 23 .4 MA Tv'T'A L- -3 1.0 60 11 . = What is the total resistance if a 5 k ohm, a 40 ohm, resistor are in series with a 12 V supply? a . 34 .5 ohms + qp,~/(w .`- .._ 500~ .~.. b . 345 ohmss ~ d . 5 .7 k ohms 12 . As a. b. c. and a 300 ohm It '3y you add resistors in series to a circuit, the total current will : increase slowly increase remain the same decrease a 2 k ohm resistor, a 3 k ohm resistor, and a 4000 ohm resistor are a series circuit, which resistor will have the larger voltage drop? the 2 k ohm resistor the 3 k ohm resistor --#G the 4 k ohm resistor d . the applied voltage must be known OK 13 . If in a. b. ELTECH 113 Lecture (Quiz #2) 2'S V Iq C~IIJ StrgA4r' x-r.L = L A,e ~~, ~ Page 3 14 . If 3 resistors of 1, 2, and 5 k ohms are in series with a 20 V battery, what is the voltage dropped across the 2 k ohm resistor? a. 2 V 57 V ---~© 5 V V d . 10 V X ' 14 15 . When a 3 V power supply connects to three 3 ohm resistors in series, how much current flows through the resistors? 0 .33 A , 0 .66 A s-+ = V i c. 1 A d. 6 A A Tia IN ~. 16 . What is the supply voltage when a 5 k ohm and a 4 k ohm resistor are in series and 6 V is measured across the smaller resistor? - .OLD ~~ a. 6 V . ... V .. l0 1~ Q 13 . 5 V d . 16 V 17 . V 2 A?-0TAL = ( . .0015',? ~~1 oar} When the resistance across R1 increases in a battery powered series circuit with R2, what effect does this have on Rl? a~ R1 voltage drop increases b . R1 current decreases c . R1 current increases d . R1 voltage drop decreases )3,sv 18 . With R1 = 12 k ohm and R2 = 8 k ohm in series, 12 V is measured across R2, what is the voltage across R1? Z VA a. 8 V 80 a u ,1L, b . 12 V ..~ c . 18 V (R I) WOO er Y 20 V 4a .' 19 . With a variable resistor R1 in a powered series circuit with fixed " resistor R2, if R1 is adjusted so its voltage drop decreases, how will this affect the voltage across R2? ...~ aO it increases b . it goes to zero volts c . it remains the same d . it decreases ELTECH 113 Lecture (Quiz #2) Kvc~ ~~ 14s s uAi z-nv 4 V ~ wN~,~V,~ Page 4 20 . If a working circuit has a 2 M ohm resistor that has a 3 V drop, and it is in series with a 3 M ohm resistor, what current flows through the second resistor? :Z~ 0 ! 11 a . 1 ,u,A ~'t1l3MjL ` T_ 3VOITs OpM .tL 1 .5 JAA c . 2 [tA d . 4 .5 [uA 3MJ2 21 . In V, a. b. a 120 V supplied series circuit, if the voltage drop across R1 is 20 and R2 drops 30 V, what voltage is developed across R3? 40 V 50 V 'OA swo Kvj ; ~ l o? a ~~ a o ~- ,~~ v ~ ~o ~! 70 V 5 d . 120 V 22 . Which a . Vx, f YzVx c . Vx Vx V is the correct voltage-divider formula? = (Ix) (Rx) = (Rx X Rt)/Vs .., k = (Rx/Rt) /Vs = (Rx/Rt) x Vs 23 . If a power supply is connected in series with 6 k, 8 k, and 11 k ohm resistors, what percentage of the supply voltage will be measured across the first resistor? a. 3 b. 6 .000 r 24 5 14C :a 43 L~ K j. ~or 24 . A voltage divider is always a : a . series-parallel circuit b . bridge circuit c . parallel circuit series circuit 25 . In a series circuit, the voltage measured across an open will be : a . zero source voltage c . infinite volts d . the normal voltage drop ELTECH 113 Lecture (Quiz #2) K Page 5 26 . What is the total current? a . 12 mA b . 2 MA c . 3 mA .."~ i 6 mA IV, 6 .000 . A R1 1k0hm T 6 .000 . A 12V 27 . What is 12? a . 12mA b . 8mA 4MA d . 1mA 4 .000 . R1 R2 2kOhm 1k Ohm 28 . What is the value of R2? a . 100 S2 b . 200 0 ..*0 3 0 0 Q d . 400 S2 Multimeter-XMM1 1775 .000 Ohm J VJ [ ELTECH 113 Lecture (Quiz #2) de T ` "7 "7 5 - l b o - '~'7 r Page 6 j3 Y KVi. , 29 . What is the total voltage? --*(n 12 volts b . S volts c . 4 volts d . 1 volts 167 V 30 . What a . 11 11 c . 11 d . 11 is .0 .2 .4 .6 R1 the voltage across R2? volts volts volts volts 1kOhm V ~ 47' "" ..:. S. R2 R3 R4 2kOhm 3kOhm 4kOhm 56V 71 L31 . Which component is shorted? a . R1 b . R2 (D R3 d . R4 R1 R2 ELTECH 113 Lecture (Quiz #2) R3 R4 5 V ..".,"...4."""'~ p0 -0.1L 0054) (2 000) ,I 002 ( tl,~VdtfS Page 7 32 . Which component is open? a . R1 b . R2 c . R3 ® Voltmeter V3 1k0hm T 36V I 33 .600 V 2kOhm I 28 .800 V ELTECH 113 Lecture (Quiz #2) -END OF QUIZ- 4kOhm I 0 .000 8kOhm