16.09: In the circuit shc/+ wr ysv9j6hown, an electric current exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flow through the resistor and the direction of the electric field through hwys6v jrc /+9the interior of the resistor?

  98.06: When any four resistors are connected in parallel, the___1s p6yy4 xwlzmx3p)+cnxo4ve -3g l-q______each resis-l) mw- n43 p1xq xxyvcopzl6+sey34gtor is the same.

  06.33: A current througm()f mw3hgngpqo 11n3h the thin filament wire of a lightbulb causes the filament to become white hot, while the la)gnmw1qf 3g3h pmon1(rger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. o x:w)e( wiky2knelo 0: ub5i2LED is the acronym for which one of the followiiiok:25: xn0 obk(eu w2y)wleng choices?

  05.16: A cylindrical graphite resistor has length L andh tb;;tgr7icl0qs.o(ti9+1yg gl0 is cross-sectional area A. It is to be placed into a circuit, but it first must; stq 0g 1iig.yb7 ot;0r9s+thllcgi( 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 s:bvbzpal8*x ;ame material. Wire II has twice the diameter and twice the length of I. If I has resistance R, II has res *; v8abxzplb:istance

  99.31: Wire Y is made of the same material but has twice the diameter and half t4ee7l(ibv zmma0e :k4he length of wire X. If wire X has a resistance of R then wire Y would havak l e:ve 07(izm4emb4e a resistance of

  03.23: A cylindrical resistor has lengthn 3 v5xz.jch8g1nuv- v L and radius r. This piece of material is then drawn so that it vx zvncj .1u85nh3 gv-is a cylinder with new length 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to 3yfw-ial.x; pmake a brighter light bulb. He decides to modify the filament. fw3 x-l .pia;yHow should the filament of a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same material. The lenb+pw9+g (xywjfc 2n1agth and radbyg+wwn 21a(jxf+ pc9ius 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, are connected to a battery in the46- 4tk mlksyn 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 resistormk6kls4 4-nyt s is connected in series to a fourth resistor.” What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompan6:d;s9 mblysuying circuit diagram has internal resistance 10.0 kW and the ammeter has inter 9s; :6dluysmbnal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the ciea+ ffurv028 ompound circuit shown to the right. The three bulbs 1, 2, and 3 - represenu+8irev0 ff 2ated 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 electricaltdl: /d -pkoc,9n v,uw circuit at the right. If the current in all three resistors is equal, which of the folvw:n-tc,/kl9od u dp,lowing statements must be true?

  99.37: The diagram at right rel vw.f7a+3y qlpresents a simple electric circuit composed of 5 identical light bulbs and 2 flashlight celll.7lvaw+qy f 3s. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following1a/l1y qf 2klq statements is NOT true concerning the simple circuit shown where resistors R1, R2/flq21klqa 1 y and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X is b8lh yiseryksqrq. q1b z ,:4 a)er2m80righter than bulb Y. Assume all ciry0 m.2h,ba4q8z )q8is erk1rqls re:ycuit 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 pas 7u;qm 6qaqejav (4k,ps through the identified resistor in 5 seeq7;avj6 (,qup aqk m4conds once the circuit was closed?

  00.23: If all of the resistors in the followine 1 apd8*dc0jog simple circuit have the same resistance, which would dissipat1c0da8dpj *o ee the greatest power?

  98.34: In the accompanyil:w, u(iupc(b ng circuit diagram, the current through the 6.0 Ω resistor is 1.0 A. :u(wicu l(bp,What is the power supply voltage V?

  97.27: Three resistorn2(u+. v rt zhfix89nns R1, R2, and R3 are connected in series to a battery. Suppose R1 carries 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 acros. fvu8t xi9(hz2rn n+ns R3?

  99.40: Three different resistors R1, R2 andR3 are connected in sa+3 /fqhsm) tparallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W.mq+sh)/3f ast What is the current in R3?

  99.13: A heating coil is rated 1200 watts and t9ne u5r/uw15-k0nisf9h q d +jfr+jn120 volts. What is the maximum value of the current under njnu15j-wd/95 +0nir9fq+hr fse t ukthese conditions?

  99.23: What is the resistance 4ih5 +jq6smhgv* r 8heof a 60 watt lightbulb designed to operate at 120 irh 6+hejh5m8 sq *vg4volts?

  03.09: How much currerhnhj 5se99, /mo7:a1 lpnb3ee5 by dent flows through a 4 ohm resistor that is dissipating 36 watts of 5o7n/, m91 je5bbn3h s9elhde:ayepr power?

  05.21: A household iron used to press clothes is marked "120 volt, 600 watfim-7 s*hd7o tt.” In normal use, the currenthds77 mo-*if t in it is

  01.05: Which of the following resistances could NOr uc bzsmj4 .6h wu:3x8pzv)/vT be produced by a circuit contpwbrc/ vmuzz4xjh 36)s:vu 8.aining only three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following t7g7cezi qn )5+ut e)kequivalent resistances CA nu5)7gtct)+eeqi7zkNNOT be produced using all three resistors?

  02.06: Three resistors of differ0wz ,l fs-jy2nw i(bfl q7(;ivent values can be connected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistance can be pnf wwblz;y ijl(s7,qfi - 2(0vroduced?

  97.35: When a single resistor is connectedn: d-f tmt(/-ahqk,pd to a battery, a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if nmadqt- tn-/ :pd,f (kh identical resistors are connected in series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistd8:a phmlle*8t ( s1iflb 7dbd::m5zbors, having resistance R1 and R2, are connected in parallel, the equivalent resistance of the combinat lsbafmld d bpb:md5t78h8(:ie:* z1lion is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is desi(jde t-;le)b+zo -aa dgned such that it has a resistance of 12Ω when operating at otd+dae z- j-;ab(el)120 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 current flows through a 4 ohm resistor that is dissipatingl8bynid8d(d:x )x0 sh7za-ly 36 watts0i)dzh llby-n7: ayxsx8 d8 (d of power?

  01.24: An electric heater draws 13 amperg- /:xtg+ iq o0sxi*roes of current when connected to 120 volts. If the price of electricixo g/it*+ s -ogixr0:qty is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much wg1e5mbt n8b8(.l6akcz nc hf 1ould it cost to keep a 100W lightbulb lit continuously for 1 year at a ratek8tfgch .n8 me161zcn(a5bl b of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lighjzt/;w3ekg44 ( n ati3at -tjdtbulb results in a power of 24.0 W associated with the bulb. Whichte(i- 3tkjna3t gjdwt 4/4z;a one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 500 wv ;be fx ntj*9y48anux;uk2 +oatts in a 120 V circuit. If all computers ar4j9t8 e; vbu 2+n* xk;uofnyaxe 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 if,2,e6r ldgzk s connected to four resistors to form a simple circuit as shown to the right. 2kr l6,efgz d,
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 wphn(o s.6a(wc: agv t80.lpwconnected to four resistors to form a simple circuit :w..cah80op psg wl n(wtv 6(aas 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 batteryr6ksn-w,7j65wh uubdjs .hf6 , an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the r kj7w6d.jwhu,sfs5-h 6b6 nu 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 are con-rymp t.ju,0p nected as shown. Withptj p.yu-mr 0, 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 ammeter, wohn zt85x7ye* +ee8fa switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 wxf8 ohzn5ye8eet+ 7*amperes.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit shown to the right, h/ h-l,ob((g5wagcr cu5p1ki what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resapcc((g w1 lhbhiou- r5k5 ,/gistance R.

  09.07: The equivalent resistance of the circuit shown to the right with re1fd- b 0w19h;oncqlq ns;1q bonl19fcwnd- q0 histances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connectek,2/pa720yyja 3jfi c :concp zhj8z0d in a combination series and parallel circuit to a voltage sour k 2pa /nyy23jj8pjfz0c,cc0h:7zoi a ce.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows fauwdq4/ r4, xc h)sbk 1fq4vh)q of8eu 14.dziive identical resistors connected in a combination series and parallel circuitczq4 hb4v.o f), ei1fwu qaudq)x/k4h4 d8s 1r 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 ide (a)63l**y 4nejx kkeh es)rxsntical. Which bulb will bek)es kaxs)*ex3ny*rj(6 4 eh l the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors are w,x; 2vhb 6e 2+oeoekpconnected as shown. With the switchebo+,w2v2 ;p hoe exk6 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 ress mhvnqu1. 4ff07wkdvrs-m ) 54i ezd5istors are connected as shozm4div fwn5sr4vk )s7f1- qeh.0ud 5mwn. 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 ide.d0y;bo fmd qvugd.cf + *: 9uw2t-nleal ammeter, a switch and three resistors are connected as sh2d f;ofdv*m.n-u:9dw y0beu . qlc+gtown. 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?