16.09: In the circuit shown, an elect,-,w. ),fg-ah opmpny jor5d-w gyv)a ric current exists in the metal resistor connected to the battery. Which one of the following choices best describes the dird pvgn--o)fy.-og hy w,)j,5mrp, aawection of electron flow through the resistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are connected in parallel, the_________each resim *k5,v6p8f8-qqwm:+ uuxh vsq dw qd/stor is the same w x*,d:s+6wmvh-/q 8u qf8v qpkuq5md.

  06.33: A current through the thin filament wi6n ,1hrpkst0q yl *yop 7z7x)c j2oln5re of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happen2n)*cp1o7to7rn5q xljyzphs yk 0l,6 s because

  13.08: Some standard household lights are being repla52r,oq.zhzsu6 k ; p2baa 3ttmced with LEDs. LED is the acronym for which one of the following ch 2ps3tz .h qo2au5;kmb raz6t,oices?

  05.16: A cylindrical graphite resistor has len fs1 x.jw+hwepgqq+c,93heb z6 fzgd6c.p *+u gth L and cross-sectional area A. It is to be placed into a circuit, but it first must be cut in half so that the new length is 1/2 L. What is the ratio of t*j+ez,69qgqd .su pghf efp .hcw+1xc6bzw 3+he new resistivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the samee/) kcol:7 cny material. Wire II has twice the diameter any7/lo)kn :c ecd twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same m:a8p s*q.osz1(syt(hvvfy 3+ dcu/ud aterial but has twice the diameter and half the length of wire X. If wire X has a resistance of R th(zau (+8yts .y3:ufhd d/ voc1sqvps*en wire Y would have a resistance of

  03.23: A cylindrical resistor has length L andx.e6 wpxugv mf/(ucc6 m);36*icotxj radius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this material becaj;t xxc(uo6gv6x3fweupc *)m/ci 6.muse of this process?

  07.27: A junior Thomas Edison wo.qmqn6 3qpwv f6 *4kwants to make a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at w 6*nw.o4km3qqpq6fv a given voltage?

  16.07: Three cylindrical resistors are made of the son8cwhj*( ktsncos r43-f f -5ame material. The length and radius of each 54f3work- ots fsh*n(cjnc-8 resistor is:
Resistor 1: Length L, radius r
Resistor 2: Length L/2,radius r/2
Resistor 3: Length L/4,radius r/2
Which one of the following choices correctly ranks the resistance of these resistors (R1,R2,R3)?

  13.22: Four resistors, eawnv4tl/*2fjf y kl- v+ch of resistance R, are connected to a battery in the following way: “Two resistors are connected in series. This combination of two resistors is connected in parallel to a third resistor. This set of three resistors is connected in series2v f+nvyjlwfl/ k -t*4 to a fourth resistor.” What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in t kvszi+ 5apm*kqo 73amy727o yhe accompanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter read*m 27zvoya7 pqsoi 7yk3a5 +kming is most nearly:

  97.37: Consider the compoun;2spv1x iy0u nem kqq/j( 44xtd circuit shown to the right. The three bulbs 1, 2, and 3 - represented as resistorsv/q s0jip(y1e 4xxm u4t ;n2qk in the diagram
- are identical. Which of the following statements are true?
I. Bulb 3 is brighter than bulb 1 or 2.
II. Bulb 3 has more current passing through it than bulb 1 or 2.
III. Bulb 3 has a greater voltage drop across it than bulb 1 or 2.

  99.30: Given the simple electrical circuit at vlnrk2c,5 *zvc 2ham;-ph b-wthe right. If the current in all three resistors is equal, which of the following statements must be tru2 c ncv-h2hr,p*-mw; zlbv5 kae?

  99.37: The diagram at right represents anh s/nr,8,n(taj4.lch( xhms simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb (or bu,.hn,/((h xnthr jan8c ssml4 lbs)
would you expect to be the brightest?

  00.03: Which of the cwer,;g+ s26e x2cbq7 vw2sa nfollowing statements is NOT true concerning the simple circuit show7g , b;ecsxan62ec2wvqr2ws+ n where resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are co f3cp6tht c3/;u,q 53 aj;bb*mnkcjyc nnected in series to a battery. Bulb X is brighter than bulb Y. Assume all h, 6k/c 3jqtu3nf3 c*5jbpa ccmy;b ;tcircuit elements are ideal. If bulbs X andY are connected in parallel with each other to the same battery, which one of the following choices best represents what is observed?

  06.34: How many coulombs will pass through the identified resisva su:15 b ka/qh:o;pktor in 5 seconds:/k1pb ua: sqa o;k5vh once the circuit was closed?

  00.23: If all of the resistors in the fq1cjv lre1 adv53p( :xollowing simple circuit have the same resistance, whichqe5ljv:(p1cd xa 1 r3v would dissipate the greatest power?

  98.34: In the accompanying circuit diagjeq ;wmid*c;* nc4 z8sram, the current through the 6.0 Ω resistormq8 zc;j*dw;ni s4 ce* is 1.0 A. What is the power supply voltage V?

  97.27: Three resistorse* 77qs xizw.0l 4mxkxyc0u5y R1, R2, and R3 are connected in series to a battery. Suppose R1 carries a current of 24u wi x70s5xqy. ym*x7lk cz0e.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected rhr;(s6g j*dfin parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and Rsh*;r gf6(dj r3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. r0 xrd))wom9t What is the maximum value of the current under t) )drm t09xrowhese conditions?

  99.23: What is the resistance of a 60 waddll/heuqqc *gg e ):f-3+ ql7tt lightbulb designed to operate at 120 voltsq )e d:-u3fll7qq hlg+gce*d/?

  03.09: How much current flows through a 4 ohm resistor that;n5vj1+ easjepvqp ,/ is dissipating 36 watt;1vjepq /a5sjpn ,+ve s of power?

  05.21: A household iron used to pres u,vt-3m 2laqls clothes is marked "120 volt, 600 watt.” In norm2la,-qmv3ult al use, the current in it is

  01.05: Which of the following resistancedr cb(oy)i11s s could NOT be produced by a circuit containing only three identical 6Ω rycb)o 1 1id(s resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the fouyhxus3 v q*n/*nx2-w;cdi 5 cllowing equivalent resistances CANNOT be produced using5;x3n-i/x*cwvudh yq nu2*cs all three resistors?

  02.06: Three resistors of dif v 4mw.f7pipo(ferent values can be connected together in different configu7mvwfo(p. p4i rations. If all three resistors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistowod1wrl sl39h9w (ui0 r is connected to a battery, a total power P is dissipated in the circuit. How much total pow( i9 wd3l9o1uw0swhrler is dissipated in a circuit if n identical resistors are connected in series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having r3b82f v4ae vdnesistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resistances is corf4bd av ev3n82rect?

  02.46: A hotplate is designed such that it has a resistanceos n2s5sjm t21 of 12Ω when operating at 120 volts. What is tns25jsms o21 the minimum amount of time that it would take to warm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through aewz1y- wey k8;h,l)(k1vt v n5ojrq1d 4 ohm resistor that is dissipating 36 watts of power?t v11-wz8wq, 5kyn1o)le ;r(kjvh dey

  01.24: An electric heater draws 13 amper9 cn,ywr r1u6os knkm50;juz,es of current when connected to 120 volts. If the price of electricinwuy5u,n kc;r69js, or01z mkty is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much would it cost to keep a 100W lightbulb lit continuh0gmxj9e0laa 3 xh*e uz3aa;(ously for 1 year at a rate of x(aeulx0;aj * 0h3g emz39a ah$0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in a powerjv )g (- 539yyfnsnkj9t1aicx of 24.0 W associated with the bulb. Which one of the following choices best represents jtyg-n(a5k if nc9y 13)jxv9s the resistance of the lightbulb?

  01.10: Each member oa d 2ja9:tenuckl) amo;m).0)rct3t nf a family of six owns a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a2nt:almko).t adante)ucj9c3; 0mr ) 20 ampere fuse, what is the maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battcqu, 2- di.p)td sxr6bery is connected to four resistors to form a simple circuit as showd.i,pq 26 d-crtxb) sun to the right.
How would the current through the 2 ohm resistor compare to the current through the 4 ohm resistor?

  03.17: A 9-volt battery is kku5-p0h5 hsl he (l+wqo;9m h:.qs1ousht o6connected to four resistors to form a simple circuit as shown to the right.( o0ols ou5. 1 u:t5eh;sqqhs+k- lkhph69wmh
What would be the potential at point B with respect to point C in the above circuit?

  02.21: An ideal battervbaug1 z0*lq . osw,l0y, an ideal ammeter, a switch and three resistors are connected aq *vwb. oug,0l0sl1z as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, an ideal ammeter, a switch and three resistorsvk0p7qp ( y1qfu q0ggpq51ie0 are connected as shown. With the switch open as shown in the diagram the am 1eqqgiq0upyq1pf5 (vg0pk7 0meter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ammeter, a switch and three resistors ,sq50w7l)z:eh6 x+wns byxev are connected as shown. Wwq5,)lx+yeze swsv7h6x: 0nbith the switch open as shown in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit shown to the right, what is thesiwr fm4(.k0y e+soj ide*ixdve:204 equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R. imvsr4 jew( e0o*:. k2dif4 d0xs+e yi

  09.07: The equivalent resistance of the circuit shown to the right wu ccjb)(7;v72eu9piyn+jld m55nrmi ith resistancesc7 c7lijb+ r) mm95p ju; d5inuven(y2 $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connecteddge87up;.y yqtue; x* in a combination series and parallelty* .;ygep q xduue;87 circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram b/s.* gbdue4fyelow shows five identical resistors connected in a combination series and.b fyg*/sdu e4 parallel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, y 2n7rk/d wk 27aonhl1all of the bulbs are identical. Which bulb will be the brightest?2 loy/nkdak71 7 2hrnw

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors are con90rcw vd/8u ty4 mp4rwnected as shown. With the switch open as shown in the diagram the ammeter wmdt4u 8y9/wv4c rpr0reads 2.0 amperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, an ideal ammeter, a switch and three resistors s1m ;1t grwlk,yzs8.x are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes.r1m8 ,zwlxt ;kgs1 y.s
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ammeter, a switch and th hgh 08bmtw0o*ree resistors are connected h 0owhgb8mt0* as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?