16.09: In the circuit shown, an electric current eximf-2+e,chc l asts in the metal resistor connected to the battery. Which one of the folca+fhe 2m -c,llowing choices best describes the direction of electron flow through the resistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resisto5 yfl254l;-ek dyq /l amkes.krs are connected in parallel, the_________each resistor qayek5l2lks;-e5 4ym lfk /.dis the same.

  06.33: A current through the thin filament wire of a lightbulb causes the firl7evg5h/2r hlament to become wer25glvh7/h rhite hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household ligo8ayzvy j+ ;js)d py*4hts are being replaced with LEDs. LED is the acronym for which onev yjdp8oj)*ay;+4 zys of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional are q ,soxqf-m:x3.yt u,(if qts-a A. It is to be placed into a circuit, but it first must be cut iox (uyf:qs3tiq-f sx - qt.,,mn 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. Wcoj)pyz ( .p9zire II has twice the diameter and z )j9 yz(opc.ptwice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diameter and h,g ua aqy )sp;bi 69*uulw/f9gljm,-talf the length of wire X. If wire X has a resistance of R then wire Y would have a resistiu9 ,a lj u6ts/f9b-a)mq; p*wu,glgyance of

  03.23: A cylindrical resistor has length L and radius r. This pie- f :ygt gbuuym*0d*f.ce of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this material because of this*fm-gg : *0ut.ybyfd u process?

  07.27: A junior Thomas Edison wants to make s2x7n fyohfc3ow p*5+6c )olba brighter light bulb. He decides to modify the filament. How should the filament of a lightbuoc2 xpb6 f)+ o s7o5n*yc3hflwlb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors nq( /4sslx lk3are made of the same material. The length and radiusq x43(nskl/s l of each 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, each of resistance R, art,81psqy vka8n eu z51e connected to a battery in the following way: “Two resistors are connected in series. This combination of two resistors isap5,1 z 8 8ukvq1ntyse connected in parallel to a third resistor. This set of three resistors is connected in series to a fourth resistor.” What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter h1(3zc-rst ar9dp/r* b myn3hin the 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 rea3 mzsrrhnht*y 3-(r p1 9bca/dding is most nearly:

  97.37: Consider the compound circuit shown to the right. The hfds033 7 pszff 6dl;lthree bulbs 1, 2, andh63f f l0dss3;z 7dplf 3 - represented 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 the right. If the current in al- 2+s 7.ps ) npdrcwemt7kx4evl three resistors is equal, which of the following sta7tw4sepd+ xk r -. eps7nc)v2mtements must be true?

  99.37: The diagram at right represents a simple elecy m3apzt2t o(3tric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which2o3zp matty (3 bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following( v// qdvuyckmxb;0*f statements is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have equal resis/; 0*ybdkcu qf(vxmv/tances?

  17.29: Two lightbulbs X andY are connecadbvwga d+5 ig (5f9l5ted in 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 with each other to the same battery, which one of the following choices best represents what vfgl bdawg a(d55 95i+is observed?

  06.34: How many coulombs wil d2v f*,tt)jdpl pass through the identified resistor in 5 seconds on2p ttj )dvd*f,ce the circuit was closed?

  00.23: If all of the resistors in the fo nqh3 rphvqh5(jb b;we ;y67i5mgp*b9+qjj g( llowing simple circuit have the same resistancejhg(9j5rb6i bhw+mq y; pq;(q p*je75n3 gvb h, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6.0 Ω resiael)(7nsbcy; stor is 1.0 Aslcb)(;yea n7 . What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a bacep s;)5ln.vc ttery. Suppose R1 carries a current of 2.0 A, R2 has a resista s.;l)pncce 5vnce 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 in ti6 m-8m3kfu,/q1lfy+ tj ri gparallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W1tfiyi ,u/mf8 mlt+-k3q jgr6 . What is the current in R3?

  99.13: A heating coil is ratedz(,:u8kun+w 7n gob 9rvjq+ms 1200 watts and 120 volts. What is the maximum valu8+bknzrg+ , qov:m(u js 79nwue of the current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operaz+u;b0beqh)rm:)iq k te at 120 volts?0;ziqkeb)+ hqmr:bu )

  03.09: How much current flo n-3vofq5 h5x qg-qr2wws through a 4 ohm resistor that is dissipating 36 watts of pr53-q xgqw- vq5fo2 hnower?

  05.21: A household iron used to press clothes is marked "120 volt, 600 w7 o;q 3(r6nd4kq xv,wdmgxn q0att.” In normal dq3w7vr;qnx nod4 m qx06(kg, use, the current in it is

  01.05: Which of the following resistances could NOT be produced by ) );mviop;sl4p ubt,pa circuit containing only three identicaluvo,m;p) it sp4b)l p; 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Whicgxk:gvo1u ( u7h of the following equivalent resistances CANNOT be produced using all three resiu:g1g7o xuvk(stors?

  02.06: Three resistors of different l x-yslnb(sb 5.onf g)wh-i;x4-rhk3dnag :2 values can be connected together in different configurations. If all three resistors are used in a circuitkxd4-s.)(fnbrlyla3xwbihh 2 :go-ng;-n 5s, how many different values of total resistance can be produced?

  97.35: When a single resistor is connected to u(gas1o8 t*5swzf kw7a battery, a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistors ar85 fg1sww*a7zt ksu(oe connected in series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 asn ka1pds0uvm 21wu+5 nd R2, are connected in parallel, n0ud1+ sv5us mpkaw12the equivalent resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω.s*o 3qy8jnf7 pjk ds0 when operating at 12sj3pq .0k yo*7djfns 80 volts. What is 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 curreuyk z 7j 3eid8xig*f02nt flows through a 4 ohm resistor that is dissipating 36 watts of powe uzge0x *ik2jy8 73fidr?

  01.24: An electric heater draws 13 ampe c,wep1w9e7 6qvky3uores of current when connected to 120 volts. If the price,p3yk6v9o ceq 1u7 wew of electricity 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 conti( yv1) 2qsd :)ngxwrwfnuously for 1 year ayfwxs:gdqrn()w2) 1v t a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in a power bgp).7u4 d c .ymgvf3;hud2 qzof 24.0 W associated with the bulb. Which one of p)2;f7g 3dzvmqgy.hb .4udu c the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a ypg7d 7 ffqb+9) bl-bvfamily of six owns a computer rated at 500 watts in a 120 V circuit. If y-lbf9 )vpg dbbq +f77all computers are plugged into a single circuit 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 -wnd*rwrq xa*n4l -r 5is connected to four resistors to form a simple circuit as shown arx-rq wdr**nln w54- 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 connected to four resistors to form apbdq k(hx,--r h2e k2v simple circuit as srq xhv-p2b2e k(dhk,-hown 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 ammeter, a switch and three resistors hhm*i-0m ou(. ati+ h6ak5 1)equtj psu:i/hpare connected as shown. With t 5o(*pie:t+ aih./simhupu0j1)kmh a u-qt6hhe 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 j65oin( -ylu zand three resistors are connected as shown. With the switch ol-6(5 z uinjyopen 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 ammeter, a switch and three resistors are conujge7 re;o8p v fnm5).-nvga .nected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes. v5.rem g8evf7uan;o-gj.p )n
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit shown to th1u s3x:3* jl vlsara4zmfx)zf* -/irde right, what is the equivalent resistance? Assume that all wires are idm4 ias dxa1)*lrsfjl3 *xf:v/u rz-3zeal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circu kpj dp2rb7jl.cg6d 05it shown to the right with resistancesdl djgb6ck7 0.2 jppr5 $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows fivpf sx 88q5 eok36iibp8c;+seh e identical resistors connected in a combination series and paieiskp fh 3 q6beocxs+ 858;8prallel 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 combinatiu ;dd( 8v(a8snaojx4 ron series and parallel circuit to a 8dd ruvaoj(xs4n(a 8;voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are identical. Ws cll*g4l(yak6 s ib.bw.i3e ,hich bulb wil4 b.ik by g,cilwa.l 3e6ss*l(l be the brightest?

  02.21: An ideal battery, an ideal ammeter, a swisy8 rzj-fpbw 1 s8x)y4o9mz 7ptch and three resistors are connected as shown. With the po8-zwf my x)s4 zrsjpy9871b 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, 9/zx z z,ur+nwan ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagu/+9 z, xrnzzwram the ammeter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal batteryfkr5nu s;1wcp ah3. 4f, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.3rfnsw;af 1.pukc 54h0 amperes.
When the switch is closed, what would be the current in the circuit?