16.09: In the circuit shown, an electric current exists in the metalqhhqy1fw/,qw5 .r)yq 1l-/cwal .u xk.,ufn d resistor connected to the battery. Which one of the following choices best describes the directionk.u.c qh .w/ hw/l)dquqq,x n1 - 1fy5afr,wly 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___28r0* 9fn/r+g z+9gmir yq erzyj giv9______each resistor is 9i2*9g0zrm+ qryz ri jgyrgv/8 en+f9the same.

  06.33: A current through 0ae 0oxudz6* zthe thin filament wire of a lightbulb causes the filament to become white hot, while the larger wx0 a06ozed zu*ires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard househol 987xwg2jz)3qvb k.g ykoh6kh:a9:glhvyb ; qd lights are being replaced with LEDs. LED is the acronym for which yhk2ol;hx6 g b3:gv 7)g ak8jzh:yq9qwv.9bk one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional sogsgw;:04+svudl gyk+ e 0i: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. 4d+glw:ek ss s+ y0g:oi;0gvuWhat is the ratio of the new resistivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of vjev76lslpw 9q(: (:v ah)nj nthe same material. Wire II has twice the diameter and twice the length of I. If I hasllnj67(9s )qh pj:nwav:v v e( resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diasdm +m,mn(mj jj*, 0+a2-vgir qcji*l meter and half the length of wire X. If wire X has a resistance of R then wire Yn(*mv j +crjl,a+mii,d-jq0m g2* ms j would have a resistance of

  03.23: A cylindrical res jm e8,v..ug* hth)bnr9w6qh c90 ayjhistor has length L and radius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What rj.u0 qhbtn) 6 me.h wj,cay*89v9hgh happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter ligh i kg72prdv5(0ii 7dixt bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make 0(ig5dpkivd i7x ri27the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same mateu 9t . qux8u)b4r5xpov.uicf0rial. The length and radius of each resistor isuvt4cu).xoxfp8u biuq0 59.r:
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, each of resistance R, z3*-a0bpduo 2uf v)mgp 1s-*t/tseo qare 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 series to a fouf 2 moaetpobg-u3*vz*p 1sq )ud-/s0 trth resistor.” What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying0r;*bwqrv sn 8 circuit diagram has internal resistance 10.0 kW and the ammeter has internal r * 8wvnrs;qr0besistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown 35 fpy a+ur;stmps63t to the right. The three bulbs 1, 2, and 3 - represented as resistors in the dia t65sf rp+3 a3ypumst;gram
- 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 simplec/oo0,/fvc.e in ho;u electrical circuit at the right. If the current in all three resistors is equal, which of the following statements must be true?vchio /;, o0uofec./n

  99.37: The diagram at right represents a simple electric circuit composed n23sevnkmr 53of 5 identicer3 32nkv5snm al light bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following stat6 zw5rkna6 ,n1c w 7owjy/nxa/ements is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have equal resisaw7/kno6wzrn 5x awyn c/6,j1tances?

  17.29: Two lightbulbs X andY are connected in-w2t8(zfd04 0 wvt3api yuhwu series to a battery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connected in parallel witztu 4-th(awu300yd w2pfwi8v h 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 ident2:a qr a(v 3 o0n1sdzqsv fscu+8tq4u3ified resistor in 5 seconds once the circuit was close4 q o+1sqzrvsfcq32s v a:8uu0dtan(3d?

  00.23: If all of the resistors in the follow+.yx sk:pbi- ting simple circuit have the same resistance, which would dissipate the gr-+syt .p:ib kxeatest power?

  98.34: In the accompanying circuit diagram, the c) 4 e3qrir 0ot2iy+kvcurrent through the 6.0 Ω resistor is 1.0 A.t o qer+ c4ivir032)yk What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battbpn/kvo6i+n5ln8 6vl* .g pn sery. Suppose R1 ca56n+ .p6silkv onvnn*/l pgb8 rries a current of 2.0 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, Rcj7jl. o44vwj2 andR3 are connected in parallel to a batterj44col7wvj .j y. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 12d:iz f- scq 95 *rx6qb-zqvg:r0 volts. What is the maximum value of the current under thz:iq bg69rq:*cxs - qvr-zdf5ese conditions?

  99.23: What is the resistance of a 6y w*5yc -)yt,mee6 zy1b* alz1fpwl h10 watt lightbulb designed to operate at 120 vo1eye-m5,p yy1wt b** 6al)lzfhz wcy1 lts?

  03.09: How much current flo-ckq/:e 2m cmoi w-;ztws through a 4 ohm resistor that is dissipating 36 watts /z q2;tkwi -mcmce o:-of power?

  05.21: A household iron used to press clothes is marked "120 veopl0q:x7 5s:t7ont volt, 600 watt.” In n: op:nte7ovsx0t l 75qormal use, the current in it is

  01.05: Which of the following resistances cvw( 3paq4c7r6 xys-taould NOT be produced by a circuit containing on( 76t3s ayrq pcvx4-awly three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following equivalent .pld8e6*0axw rfc.boresistancesoae l.b r6c.p 8f0xw*d CANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be connected together in dif l)zwo42h:vwr*k e pj:ferent configurations. If all three resistors are used in a circuit, how many different values of total resisj4:)z rwk* 2w:hl opvetance can be produced?

  97.35: When a single resistor is connected to a battery, a totalpz2vak : w.+zm power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identica+.p: wz2mv azkl resistors are connected in series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having r 13 uejfe8/mgrkz3;5,1 te wppv,lqvyesistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statementsw;33z1rlj yvft ve5e /m18,eu,gpk pq about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω when oper1-c45 ar 1 -yt:zqhgnlwxhu2yating at 120 volts. What is the minimum amount of time that it would take to warm 0.45 kg gqu-tr4yyz n2-hlx:cw ha 15 1of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor that is di)znfoul7(6 n4fhbg/3 af tgs+ ssipating 36 wa/s+ff76 bzf gln4o n3 h)gu(tatts of power?

  01.24: An electric heater draws 13 amperes of current when o tt ar-xygh44,cr9)l connected to 120 volts. If the price of electrg h4o4atr) 9,-lcyx rticity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how muc y) ( x1r8po ,d3nnv6r)y kzr8cyazy4kh would it cost to keep a 100W lightbulb lit continuously for 1 year yaycz ,8(yo k4)y6d rkxn1 zpv8)r3nr at a rate of $0.10/(kW.hr) ?

  12.09: A constant current hoqgw(jcfw8or4l7 z(jr2 :j- of 4.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following choices best represents the resistance of the lighth:r2 -rwz( q(jj8ojcf4 o7 glwbulb?

  01.10: Each member of a family of six owns a computerhi lwz)e pe+ (a pv1a-hl3s11c rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuitl( e hl pi)-11zc ava3s1pe+wh protected by a 20 ampere fuse, what is the maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resistxhoq( 64rq-d bors to form a simple circuit as shown to the 4-dh6b q(ro xqright.
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 connected to four resistors tk3(c4 nc aapen0wi9 1 zm*dvf4o form a simple circuit as shown to t9n a i1 wzk3n*v 4ca0(4fcemdphe right.
What would be the potential at point B with respect to point C in the above circuit?

  02.21: An ideal battery, an ideal ammeter, a switch and three 5)ed8k7ju xg x)+let qresistors are connected as shown. With the)5 e)t+j8 edxu7xk gql 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 resis crw8 ul-8wlqm(,4efctors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amp,w rf-lm c8(cqu84wleeres.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal batte; - g+8 oy,s m9yfvm1yhthbo4zhzr c80ry, an ideal ammeter, a switch and three resistors are connect,s8g 9b4hmoomzzt08+-cr y1;hf vyyhed 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?

  12.14: For the circuit shown t+8j mj7 q2m2sg0pmij9uu- pgo (iwq- to the right, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have jgm7u sgt( 8p2miiq- jqmpo0w -+j92u identical resistance R.

  09.07: The equivalent resistance of the circup;hy6f/9vqkjm 07r5jo j l/e0 pkaai/oa- s6vit shown to the right with resistances5/ v- j; vp7sqflo/oyar/kh 6i6epja 9jm0k0a $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors co/z z-c mhy9wr0nnected in a combination series and cy- rh09z/mzw parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below /38e77 9mdc(elfn9 ak* bdckqb6v9zucw pvf+shows five identical resistors connected in a combination series and parallel circuiqc vmf(b/*d8 ke97c+n9lk bpu93cfd wa 7vze 6t to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of ( 2;ckc)l)tv) cxecmm the bulbs are identical. Which bulb will be the brightecevc))ccxm kt 2lm;() st?

  02.21: An ideal battery, an ideaq0 she2fzsp,5rb3v)y l ammeter, a switch and three resistors are connected as shown. With the swvysh 3,e)bprzf02q 5sitch 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 resistors c mknfjs0;.wr jt07+kare connecrkcntj; km j+.00s7fw ted as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ammetek- z)jk /ub pvf;it72qr, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperu/ t2bp)v;zki- kfjq7es.
When the switch is closed, what would be the current in the circuit?