16.09: In the circuit shown, an mv;48olwgv l)kuo+u :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 resistl4o+)km:vw8gl; o uvu or and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are connected in parallel, tjxgqb.9a+ip e-yfgcrk ;963i q3vxj7he_________each resistor rjc;af3yj7g9ep-k vq q9 bgi+x.36xiis the same.

  06.33: A current through the thin filament wire of a li;rbve(ajiwnja 93; +rghtbulb causes the filament to become white;rija3rjv;9 nb w+(a e hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lighauzc+p3b ga z40+sii ;ts are being replaced with LEDs. LED is the acronym for which one of the followinzg 4i++c 3az0bup s;aig choices?

  05.16: A cylindrical graphite resis .03p+ 66s2urq4oljd qyn gdretor 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 the old q r0u4do6epyr+3g .j l nq62dsresistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same material. Wire c(/ u0ywoz it6yx: r1aII has twice the diameter and twice:zxru0w6(1/ t oiayyc 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 anzjj* +bp qz0gudwu.;9-z b vd1d half the length of wire X. If wire X has du b1gvzpj. jbd 9*q0 w-+zz;ua resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This piece of materiali v+fk 5a-w vemg,o:am0y24b v 8lix .qz:hs5r is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this material becs, :ix5av rg+ 42ev5 0whzbv8lm-aikyfoq:.m ause of this process?

  07.27: A junior Thomas Edison wants to make a brighter wmn*;cv/m hi,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 mn*/hw;vcmi ,a given voltage?

  16.07: Three cylindrical resistors are made of the same material. The acj9q*cd: n .n36bygw: k e+illength and radius of each3d*yal: jc n6 +.egc ikqb:n9w 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, ec a*q)ma5r9x8mo de t3ach 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 connected in series to a fourth resistor.” What is the equivalent resistance of this arr9a3r*8 o e)dtaqmmx5c angement of four resistors?

  95.35: The voltmeter in the accompanying circuit diagram hasz.cha;r+l5 ux/)qbo l internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 ; )cqah 5 ru+l/bo.xlzmA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown tq41ou5sxvt;l, 8 ywo xo the right. The three bulbs 1, 2, and 3 - oq,15oxl u 8wy;4xtvs 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 fa; +o 0an6edvcircuit at the right. If the current in all three resistors is equal,d o+0a;af6env which of the following statements must be true?

  99.37: The diagram at right represenx3kg .u9gs 1je1oqy( uts a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb (or bulj u1s .k9 (3uggexqyo1bs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concern.o drko288i zping the simple circuit sho 2r8pidokz.o 8wn where resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a bt9pytvs. p/ lvr)8gkw) .jxo: attery. Bulb X is brighter than bulb Y. Assume all circuit tlg8xr./y)wv)pp .:vo t9skjelements 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 resistor in 1fq2vgtpiqf* sr4/z 8 5 seconds once tpi1 8*z 2fv/4rgqs fqthe circuit was closed?

  00.23: If all of the resistors is9kdh5k1e58s zsty 5g n the following simple circuit have the same resistance, which would dissips5k5 ysdse9g185 htzkate the greatest power?

  98.34: In the accompanying circuit d- i hf2tde(*z+bt2mrc iagram, the current through the 6.0 Ω resistor is 1.0 A. What imz ci2*+rf he-t2db( ts the power supply voltage V?

  97.27: Three resistohdu-90yq:r5;g fzxi swp*ir (rs 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 ; i hr5yuqrdsz:xgw* f0p-9i( across R3?

  99.40: Three different resisto z5si xryj3;s:rs R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2Vxsry;:s 3zj5i 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 120 volts. * lp xb7k.3wa4;r nocb What is the maximum value of the current under abo;c3lrb*pn7 .kw 4xthese conditions?

  99.23: What is the resistance of a 60 watt l6kq z:f j.tkd(ightbulb designed to operate at 120 vo.d qkkj(tz6: flts?

  03.09: How much current flows through a 7qg;(5hr8v- ygvtt )1nxfll3 w7hzpt 4 ohm resistor that is dissipating 36 watts of power? fl73x5vl-qgr1h;ht n87) gzp yt vwt(

  05.21: A household iron used to press clothes is marked "12b)evx.4 zkv g70 volt, 600 watt.” In normal use, the currkb7 zv4g).x event in it is

  01.05: Which of the followrb.t qsuq s ep 58o,*;)viodc;ing resistances could NOT be produced by a circuit contaiodtrep cbu ,*iqsqo;v.8s; 5)ning only three identical 6Ω resistors?

  94.37: You are given three 1.0 *i1 .chggi/s7cy;h-: c h vhrpj0m;tb Ω resistors. Which of the following equivalent resista h/*c;b ;v-7sip t 1iyh gh:0h.rcmgjcnces CANNOT be produced using all three resistors?

  02.06: Three resistors of d b mw(55z.j*chd;*sgtwkps8 yvsdg *e )jyi71 ifferent values can be connected together in different configurations. If adi mcgdz.*ys e(*55w 7j8 swtkj)yg;b*s p1h vll 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 8(cy8rlp, e sopower P is dissipated in the circuit. How much total power is dissipated in a circuit pc88 rs(l ,yoeif 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 vzca; *a3d;b,qwv 2sof 6-cse resistance R1 and R2, are connected in parallel, the equivalent resistance of tw3ad,qv c -vsb;6cso;af*z2 ehe combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed jd h77.k(n8j xpv/ftf - aip9qsuch that it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would 8fix 9h 77-ftkjvapp(jq./nd 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 ozxcttf:e67 d- ueo1 k)hm resistor that is dissipating 36 waof6x)-ztu17eet c d k:tts of power?

  01.24: An electric heater drawgd33 fw. ee9;c3p kjrlce2k*h s 13 amperes of current when connected to 120 volts. If;kwr2 f ckeg*d.3 3lhee c9j3p the price 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(j gkvrf;pn33o4 l1:w ce-h im ecovz +8-4jpknuously for 1 year at a rate of3hpj1 ;l8(-nkce 4oj-3wvg+zo fr4 :icmvpe k $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulbng*d0lu2r;ykh gt /w/ results in a power of 24.0 W associated with the bulb. Which one of the following choices best represents theyl*t/kw/gn ghu0 r;d2 resistance of the lightbulb?

  01.10: Each member of a zs8kba,x u:/ f0ghjhy *s)*g tfamily of six owns a computer rated at 500 watts in a 120 V circuit. If ax jgg huk**0h)tf/ss 8zb ,ay:ll 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 is connected to four rwvb5ml,5 2z4 bdh1*r8 gb+yec 2ycunpesistors to form a simple circuit y*bhcl12 28 rubnb d5pywgmz vc5,4 +eas shown 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 a simpg(s5*.*c vq kkze lbn(le circuit as shown to the righzs v.(5kgekq**( lbnc t.
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 resistor ;k48b-7l+etr)rjfy/ cwy2ln s r vem+s are connected as shown. With the switch open as shown in the dre + n+f8t sy2/yb)rlw;-m lrvecjk4 7iagram 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 amhmip).qe ok*p:,te 9 imeter, a switch and three resistors are connected as shown.e9k,t: h.p) eq*mopi i 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 ammeter, a switch and three resistors iw a+65 yo,vroare connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 5, ovor+aiw y6amperes.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit shownoh0x mqavg :3r8 yqi3, to the right, what is the equivalent resistance? Assume that all wires are ideal, thq0homg :38q3 va ryix,e battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance oh/u7fkud:- jrf the circuit shown to the right with resistanf -rj uuk7:h/dces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a combina3r 5in) 5rq.*j 9vlwtl;mkbtption series and parallel circuit to a voltagn5b i j.) lmp3;rlwqtv9t*5r ke source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resiesg4q3,00y.0mje letz j g5j rstors connected in a combination series and parallel circuit to a 3jtgmr , gjsjq0el.ey5 040ze voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are wq:ma 9 mr*e8qp. eh:tidentical. Which bulb will b *p m mah89e:t.e:rqwqe the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three reso4y 7qd,4yvg: zd sab2istors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amp :odz gv2y4 4byq7,asderes.
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 resistorh6)jovsg 9ow o7dh*uxnlv0 /:s are connected as shown. With the switch open as shown in the diagram the ammeter readvh/nhlsou wovgxo:j7* 0 69d )s 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal amrm,:3)sl qjj27m 6izwa lass8meter, a switch and three resistors are connected as shown. i:2sl j,lm)rjwz q8sa6sa73mWith 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?