16.09: In the circuit shown, an electric current exists in the metalw/atf4i0g- qecx2) yb resistor connected to the battery. Which one of the following choices best describes the direction of electron flow through the resistor a)ceq240xiby / -tfa gwnd the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are connected in parallel, tib64m vnpdiais*; hm1 9 i6j 6huy09blhe_________each resistor is v; 1bpml0j4is6 6h ab6*u9iinyih9m dthe same.

  06.33: A current through the thin filament wire of a lightbulb cxz*kc1 bysr.; auses the filament to become white hot, while the larger wires connected to the l*1cs b.ky rzx;ightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replacez0 ojedn kf 4kmxrp.;+oc75 2fd with LEDs. LED is the acronym for which one of the f. ;0nzx7r25f+pekdj mfo4 c koollowing choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional area j,o*5igz loa2vl ,i34w(nmj t+c;kql A. It is to be platjnwg*iioa 5,mll4 ;v3j (2c+ l,qkzoced 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 the new resistivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same material. Wire II 6nu)*t.3aeh0irly wfhas twice the diameter and twi0rnai6wf) y.t3e uh *lce the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has tw. q8sch);o smj4l1spvice the diameter and half t mp1)s 4hs cqj8.o;lsvhe length of wire X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor h*a8c+aq ou86x , uwgeiwyj-;j as length L and 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 becj u,g+x 86y8oujw;awi-e*caqause of this process?

  07.27: A junior Thomnz77fq2xq,*y z0szb r+gmi 5bas Edison wants 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 a given voltage?iz,qm7 ns0q f zrgb 7yb*+z5x2

  16.07: Three cylindrical resistors are made of the same materi 2cpk;tg xoh+tyhguw/( ,-d1 nal. The length and radius of each res2gntkoxu+c-/t,; d1y hg wh(pistor 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, cv d*r ztku42.ql +d7neach 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 connectedq2 zndtd ur*lk+c4.v7 in series to a fourth resistor.” What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying circui qlb2f ;k.rikzoaoq3lu) k3*v d 8du34ks,d;z t diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. Thearozsu;louiqdd 8; 3*.k3 )klzbkv2,dfq 3 4k voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The three bulbs ccl7:wvn8p0o m/lx1lzu/pg 31, 2, and 3 - representecw7/8zmgcl/:xluol p1 v30n p d as resistors 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 thek6.rik v5/em v8)pg yp right. If the current in all three resistors is equal, which of the following state)kpe8vp. 5miyv6/g rkments must be true?

  99.37: The diagram at rie:jhy aghdl6jg;fi0x-( hm 5 (ght represents a simple electric circuit composed of 5 identical:iyx0e 6f5 -h;djg(amj(hh lg light bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning themn .s+ dkt )(no9+gamx simple circuit shown wstnmd x)m +9.ak go+(nhere resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in sehn 36iryc6dwe* u) mslg//69otwpv .t a* guj/ries to a battery. Bulb X is brighter ty *a/rt*ocls6h v6gwmp/enji3u.9d/g u 6w t)han bulb Y. Assume all circuit 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 resistmy ;kzvlv0x lx5a); 1uor in 5 seconds on 0)yalz1lxk ;5uxvmv ;ce the circuit was closed?

  00.23: If all of the resis8v i8igpw*x 1otors in the following simple circuit have the same resixwo88v ii*1g pstance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through thehm rno9 q 17dm.)bblo,*5ibj n 6.0 Ω resistor is 1.0 A. bromjhb.* nlonm7,59dqb) 1iWhat is the power supply voltage V?

  97.27: Three resistors R1, R2, an.-1ucbkap /p dd R3 are connected in series to a battery. Suppose R1 carriesa1cu. /-kbp dp 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, R2 andR3 are fek:y:u c -s k)awvg+*connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the curak-*yc ge +sk:wfv u):rent in R3?

  99.13: A heating coil is rated 1200 bw(z+zp jsg8 ;,qr-ncwatts and 120 volts. What is the maximum value of the current under these cond+; 8z,rn jz cq-psbwg(itions?

  99.23: What is the resistanc gkmfn.)7)o ihe of a 60 watt lightbulb designed to operate at 120 volts?m)7fhik on. g)

  03.09: How much current flows through a 4 o4/iij+p 8qpf m 7slpt7hm resistor that is dissipating 36 watts of power 4+sp p 7tqmp/f8jii7l?

  05.21: A household iron used to press clothes is marked "120 volt, 60:6lg8xli5(aimfoz9 m 0 watt.” In normal use, the curren659z xliim(a l8 mog:ft in it is

  01.05: Which of the following resistances could NOT byz3hh0v l rfo0d+ px(6e produced by a circuit containing only thrdpx6z+hh3v0y 0 flo(ree identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resisto)eis ;,gb3ig ars. Which of the following equivalent resistances CANNOT be produced using alls3ibeag gi;) , three resistors?

  02.06: Three resistors of different values can be connected together in diffee u 700 pvh89yxprx*firen00ef*pr vi9xp xh78uy t configurations. If all three resistors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is connected to a battery, a total power P is umx.7, jswrv h11dtj ;dissipated in the circuit. How much total power is dissipath; 1jx 7j.tdr u,vm1swed 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 k*st kl ;7px//mgrubht2h5; yresistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the followin57um2hk r t/gyhb l;k t/p;x*sg statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω wheo0ige xl+ev7*n operating at 120 volts. What i*7g vloe+i0ex s 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 curre-(y1k h5ttwmant flows through a 4 ohm resistor that is dissipating 36 watts o(wamht - ky51tf power?

  01.24: An electric heater draws 13 amperes of current when connected to 120 se*mdwk,p4 s3rgcf 7t1h6m-1w*dv vuvolts. If the priws 741v*k gf ,13mt-r m*depcsuw6v hdce of electricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much w jxrn; o (k6m2.a,xj.z c1cjqsould it cost to keep a 100W lightbulb lit continuously foj( rkc1xaz,6 js2 ;qoc.mxj n.r 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in a power of nwn)0-; mgiy hzfui )m(4ye4g24.0 W associated with the bulb. Which one of the fomyu)fm4zhgw(n )ini e; y4-0g llowing choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 500 watts in a oxz4ijv dhw4(rxe76wqrf5. .120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, what is the m5vrrwo4q.(d 6eiz fw7.h xj4x aximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resistors toa vq2k.m7 8yb2fkn9bu form a simple circuit as shown to the right.2fmq b7k2 kyua98.vbn
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 rpu+qu/w*bowm 4 :gm -yr;a k3iesistors to form a simple circuit ao/am yw4u:b*+w;r3 u mqkpg-i s shown to the 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 ammewxy*hjme// /wter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ejwmyh/ x/w/* ammeter reads 2.0 amperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal batteryyps+ 0l8o /q1 .b5j8fk reldf-h 6aiwg, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the p wrlsfjq86fk1eo 5a /.d-0+hl8ygbiammeter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, anp/+fmm 03u r17bi: pylep js9h ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter rea7epj 9ub y+r3l ps/0:pmmihf1ds 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 the equivalent rejecyj hw-*w)1tsnu/ 7 sistance? Assume that all wires are ideal, the battery has no internal resistance, and all ts*tj7/yn w-1c ) ewhujhree resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to/gfa )u7e 0 9y.g+mx-vcb qauo the right with resistancaeobmc x guu 7f).9-g 0a/yqv+es $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical r+u .kecn5;2)eztu7h v nh0zhmesistors connected in a combination series and parhv .ezm2u50khe n ;ut+z )nh7callel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connected in a combin w5a/j47iu7o acab 3chation series and parallel circuit to a voltage oahab775j3 cwui 4a/csource.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circup3:s /5b: ma.(irt;: k cgd7zcepy rguit diagram, all of the bulbs are identical. Which bulb will be the brightest5a utr:s;d7(pyb/e.cpk icg 3m: rgz:?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistudx0r6go/c yb48o ) nf 2xd9bnors are connected as shown. With the switch open as shown in the diagram tdgo902xnduf)/4 ob x8 yrncb6he 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 tndgpy5l -,t2 eb knn0/hree resistors are connected as shown. With the switch open as shown in the diagrapn gb0 y,ndnt2e/l 5k-m 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 ammeter, a switch and t:g w:y6x ht7zthree resistors are connected as sho::t t7 6wyxhgzwn. 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?