16.09: In the circuit shown, an electric current exists in the metal resistor co)q-g/2 mlzhhtaq0ahc-k nwg(sc2 i 44nnected to the battery. Which one of the following choices best describes the direazq4c4agw0 s/ nh h(-ctm)k 2i-hg 2lqction 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 connec s:e54k t8p3j;efss bmz4 fts6ted in parallel, the_________each resistor is the sam4tp:ks s5zbf es s4;63mf8tej e.

  06.33: A current through the thin filament wire of an 2g7,ymyzhje-f3w2 q lightbulb causes the filament to become white hot, while the larger wires connectedf2mw7yhny gz2 q j-3,e to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being repme9o5z xargy;z5 1dp ;ajo6g*laced with LEDs. LED is the acropz;o9 z6*55d gejam1xg r; oaynym for which one of the following choices?

  05.16: A cylindrical vq8e.5 gene5+4vd;ohedf+8 oixx h6agraphite resistor has length 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 the new resistivity to ef;.on e8d6vv4hgix+ax d58o hq+ e5ethe old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same material. Wire II has twic7c;0.dcb iiwr e the diameter and twice the length of I. If I has resistance R, II has rei0cb wicr7d.;sistance

  99.31: Wire Y is made of the same material but has twice the dqh +krzs o-q/y3-ngpjur-y2m9rq r85 iameter and half the length of wire X. + r/yy-9pr- qujskoznr qm h38-qr 5g2If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L waw*t2fu5( s spt64fgd ,,urjand radius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to tw6*spa(ft5s4r,,dfuwt uj 2 ghe resistance of this material because of this process?

  07.27: A junior Thomas Edish9 lewi-1 ct8ion 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 volciwhe-t81 i 9ltage?

  16.07: Three cylindrical resistors are made of the same materia0v,gs)b- a 4tjc bun7dl. The length and radius of each resistor is: gj7b-tvus) 0 ,abd4cn
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, are connected tr2p gzhyuu2g7;ud/rub,:s p* o 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 i*updy: ;7/ 2h,2 urupsgzrbgun series to a fourth resistor.” What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying circuit dd+cv ju2d0scp)q 6 a4qiagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most n ps u+d640qjcvaq2)cdearly:

  97.37: Consider the compound circuit shown to the right. The kwhn3b 6 9chn6l .3stgthree bulbs 1, 2, and 3 - reprg3sb6hnn . lh9k6tc3w esented 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 cu*uo.6oq-oz sdt5ip/ srrent in all three resistors is equal, which of the following statements must be t.s u*iopd-o q6t/z5 sorue?

  99.37: The diagram at right represents a simple electric circui5uz:uwf:7pq kssc 6f/t composed of 5 identical light bulbs and 2 flasz qckus5w f /:7psfu6:hlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the simple circuug-uyd(+e ff)it shown where resistors R1, R2 and R3 are have eff) g( -deuuy+qual resistances?

  17.29: Two lightbulbs X andY are connectez x;dhpsrx+ovsq0 *fm ,(w/2qd 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 wivxr/szs ,+f2qh0;md (xqo* wpth each other to the same battery, which one of the following choices best represents what is observed?

  06.34: How many coulombs will p:1whhnwc;3 ej ass through the identified resistor in 5 seconds oncen3hw ;hwc:je 1 the circuit was closed?

  00.23: If all of the resistors in the following sio sye9sxnse48 :8oupw -lh 65wmple circuit have the same resistance, which would dissipate th:h sel89s pn -e65swwx4ooy8ue greatest power?

  98.34: In the accompanying c m6ikn.p46lumb ok9g7+p qq )oircuit diagram, the current through the 6.0 Ω resistor iskqoq n9umpk lb7mo6 +g6ip.)4 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in sn fx .+;6dgecreries to a battery. Suppose R1 carries a current.+ c drf;ge6nx 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)e-ilqr ji)*v;x0 hl g connected in parallel to a battery. Suppose R1 has 2V acros l-vri0h)*ix ;q)ljeg s it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil 50hqu.n5;6ntz )e yrzdp +hweis rated 1200 watts and 120 volts. What is the maximum value of the current under these conep yzr+ued) hz w5t;60qh5nn.ditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate at 1c5wts7 b j/eap:4u4hh20 h4 et/b 5:acj4suh7 pwvolts?

  03.09: How much current flows through a 4 ohm resistor that is dissipating 369ayssi- drr:7 watts of poweir-s9 dy asr7:r?

  05.21: A household iron used to press clothes is marked "120 volt, snfii/+1 pi c8600 watt.” In normal use, the curfici1pn8s /i +rent in it is

  01.05: Which of the following resiscvs gg1s7wdl41+ea + ptances could NOT be produced by a circuit containi+s1+w7sep l1dvcag4 g ng only three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the fz5/ s51a/z)fieixdxp,m( yzzollowing equivalent resistances CANNOT be produced using x/zxm )pf yz5(1ze5/si izad,all three resistors?

  02.06: Three resistors of different values can be coyldl)6 3 njcjxw:z;;w nnected together in different configurations. If xjwwzcl ;;jd:)n 63ylall 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 powe.r* acqh g2:a jr.w*ckhc* slp(.olq/ r P is dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistors are connected in serk/ .rh2(a**:hlcpgw*qc.c ajr o.lq sies using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R29v5c( fzu7ihyd ab:cxf-3fg6, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statem9zv a75(ic y u3:6 -ffcxbgfdhents about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω when opera y 8(65rzm9cqgtnb.(1 -aetf/vh zrbmting at 120 volts. What is the minimum amount of time that it would take to warm 0.45 kggbhttm1 afz qcne- z5/8 r.( yvbm9(6r of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor that is disze)3 -e dv1u3h.6xtu0imbgc ksipating 36 watts omv1e 0ue3 gtk3dhb)-i6uz.cx f power?

  01.24: An electric heatms(i zax, /b*/cylz .ler draws 13 amperes of current when connected to 120 volts. If the price of electricit,myl /al*zb/ z csxi(.y 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 lit0bfz16i pjcj9 continuously for 1 yeajci0jb6p91z f r at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb result -vx7t8tmtw1as in a power of 24.0 W associated with the bulb. Which one of the following choices best represttxm1 wa 7t8-vents the resistance of the lightbulb?

  01.10: Each member of a family of six owns aq 8ntnz gy m10l1dkf,-)pj j+d computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere f) 18dpjdj0kn+tn1-f z,lgmyq use, what is the maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt batteryyjr 5dycx -8lx(mf6; f n/b2gk is connected to four resistors to form a simple circuit as shown tocybkx2n x/mj(gf; r65 lyf-d8 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 formh0lu .qbm 9gi7 a simple circuit .bg i0quml79 has 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 ammeter, a swiirch f*s a*n(+tch and three resistors are connected as shown. With the switch open as si rsn*hf+ c(a*hown 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 h)t r e7b0y:uoammeter, a switch and three resistors are connected as shown. With the switch open as shown in )yeu7trb oh0: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 y1a2n3 gvwidx;t4r5 2:d )kktf .-of lj-cbqpswitch and three resistors are connected as shown. With theq fbg -vc4jtl dr t- )y23k5:o1i f.;xdaknwp2 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 the equivalent resistanp,/rrvh )1qm im,g(dw ,2ihyfce? Assume that all wires are ideal, the battery has no inte)mmdh,f /i ipr2v1,rwhy g(,qrnal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right withi+y ;dexq2 ud;-kw z+w resistances +xew+ k-id;2 yduwq;z$R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected id-wvgqt0i 4o 0/1ecxan a combination series and parallel circuit to a voltagi0xca/-dt g0eq1 w 4voe source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows fiv8i4 px;c u:sp1wh/f3 c16 w(cuwmeaape identical resistors connected in a combination series and parallel c( e/x 6 u3a if4apchp1:1; cmwsw8uwpcircuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are identical. Whi7 qmx;vnrh7 xya y0:)uch bulb will be the brihmn0v):xx7y;uayr 7 qghtest?

  02.21: An ideal battery, an ideal ammeter, a swic:u ss g a49(pmg:b,hhhu15les 7thb :tch and three resistors are connected as shown. With the switch open as showneh g:(hm7csu,4h5bt b 1g 9:las:p shu 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:xa m:mz,m1k p, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as showm:,z mk:x1pma n 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 swiy+3yxn5qcn.r0,zip,gx y3 yg m.b sm1tch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperesq+rzgp. n. x13gyncm3 i x5m0y,syb,y.
When the switch is closed, what would be the current in the circuit?