16.09: In the circuit shown, an electric current omco66rane(r p0.rq 7 exists in the metal resistor connected to the battery. Which one of the fo7n.cor6o(6rp qr0a m ellowing 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 resistors are connec*hw:wv,r 3f alted in parallel, the_________each resistor is the sa:wvfar h,*w3lme.

  06.33: A current through the thin filament wi1orezf.+v.:duf q 6gu re of a lightbulb causes the filament to become white hot, while the larger wires con1. :6f +ofv.rzdug uqenected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being reyxvyq idkpl 0 k j 9sa1lmf5u52d7cj( :/31bjaplaced with LEDs. LED is the acronym for which u0sjklja i q 1/d:b ax5 5(f7 ydv32lkyj1p9cmone of the following choices?

  05.16: A cylindrical graphite resistor has length L and crou8yasr 9p ;;mlss-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 resial u9s p;r8y;mstivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same material. Wire II has twice s6,jvd v n1xl9the diametedv9j6, sxl nv1r and twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of thei5t bn/ z,t6qknm:g 6g same material but has twice the diameter and half the length of wire X. If wire X has a resistance of R then wire Y would have a resisnnm gkqit6/ zt56b ,g:tance of

  03.23: A cylindrical resistor vs 7avzoq y4c-6tx55brm- vp5has 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 because55vtyv4c- qs7rbvo p 6 z5-xma of this process?

  07.27: A junior Thomas Edison wants to make a brighter lightnp. .vmmh-0)vl9 ff xa bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in orfpf an) m9vh.xlv. m-0der to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of ttqk8 n19jynoed8/q z8 he same material. The length and radius of each resistor 1t8qqke d8 9y8nzjo n/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 t;wx56l9 (sq lw cvfrm7he following way: “Two resistors are connected in series. This combination of two resistors is connected in parcsl(l7rfv w 5w6q9mx;allel 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 in the accompanying circuit diagram f1exe2r)zo:ne5ab ;2 v mq :krhas internal resistance 10.0 kW and the ammeter has inter fv o15zeq;ne r)ar :kb:m22exnal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to uuu(zi;9: qui the right. The three bulbs 1, 2, and 3 - represented as resistors in the 9(zuqi:uui; udiagram
- 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 curre./k6gf , vbv b**hdday1 y+tbmnt in all three re ,yddkfv. ab1b/*ymgt h *+bv6sistors is equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit composed ozv /e9o p yq03jr5bl*w (bf)bwf 5 identical light bulbs and 2 flashlight fq0wb zewy/3pr9 o v*)b5( bljcells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the followin xokc7 l1o.a92 qmunqj5xy,c :g statements is NOT true concerning the simple circuit shown whekxo9c :x co, n1um2a 7j.ylqq5re resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connecte9z9h+ rdx ic)sd 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 s+ )id9hc9 xzrrepresents what is observed?

  06.34: How many coulombs will pass through the identified resistor in -*2-c+2feah hi i ibdwfv pa(15 seconds once the circe+w- i1ic22d hf(fbha-*apiv uit was closed?

  00.23: If all of the resistors in the fol+.n4 6oo3y-o ykhxlx7 jvc4oylowing simple circuit have the same resistance, which wou ooyhcxnoyl .44j673 +vx ko-yld dissipate the greatest power?

  98.34: In the accompanying circuit diagramht*hwp, w1+f 7 jr1 bid3y0qag, the current through the 6.0 Ω resistor is 1.0 A. What is the bp1afjh 0,drt3h*1g iyw7 q+w power supply voltage V?

  97.27: Three resistor:2lsc4 vhq;fns 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 dis4qc2vfsh ; l:nsipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected )ik8 r *2jh.ruzxql/y9 wg :xsin parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates.lshgykixx r)jw8z*:2 qur/9 6 W. What is the current in R3?

  99.13: A heating coil is ratebp y)l*m6uwqsw(zay :9ik x)5h vq89dd 1200 watts and 120 volts. What is the maximum value of the current undes9q5ly )*wpiqa(: y h9)z 8d wxbum6vkr these conditions?

  99.23: What is the resistance of a 60 watt lu.3t+hiv 5r)q,z7w eg:suvf3uqq*s h ightbulb designed to operate at 120 volts 7 tuuf ,r*v3g:qwz5.)i 3+hhsqsquev?

  03.09: How much current flows through a 4 ohm resistor that is diss0hgh1 qu(5 eu 3da(vxaipating 36 watta vud(g5he1u0 (3haxqs of power?

  05.21: A household iron used to press clothes is marked "120 volt, 600 watt.ogzam y+,7z2e ” In normal use, 2+zezm7y ag ,othe current in it is

  01.05: Which of the following resistances s u zt93z331hhqmx -fscould NOT be produced by a circuit conta9m13hh szq fsxzu3t 3-ining only three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Wh+ +f ,dsm3yzjji a5/9gdpzpa7 ich of the following equivalent resistances+7ppam5 yd,sz /+fjazi3j 9gd CANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be connected together in diffa/gh2f a 5ff6eerent configurations. If all three resistors are used in a circuit, how many different values of total resistance can be pro6aeaff /gf5h2 duced?

  97.35: When a single resistor is con2xornm)a js6v:w16 kw2y. esbnected to a battery, a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistors are connected in series usix w6krns61yj 2 )avowsm eb2:.ng the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, ar 2j,0ig 5 pfvq*tcqk-le connected in parallel, the equivalent resistance of the combination is 5Ω f5qt0 *ck-lq v gjp2,i. Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω whenu8 aekk 9ovb 2y)io.:v operating at 120 volts. What is the minimum amount of time tvoakv 9io)k2 :yu.eb 8hat 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 rbdq 1lsl1+x f.esistor that is dissipating 36 watts of po .x sd1qbfl1l+wer?

  01.24: An electric heater draws 13 af.9 4cqb f-pz2rac e4smperes of current when connected to 120 volt. -ezr4sp24f9b q cfcas. If 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*e dc0zt9d)i) oooa 0s it cost to keep a 100W lightbulb lit continuously for 1 year at a rate of*)de)c9 zood0 tios0 a $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbul,cn) ./ ofarkxb results in a power of 24.0 W associated with the bulb. Which one of the following choices best represents the resistance of the ak ),.ncox /frlightbulb?

  01.10: Each member of a family of six owns a computer rated at 500 watt(von51dbs;jg ;bw*g u s in a 120 V circuit. If all computers are plugged intougo; (js b;bn*vwd15g 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 connecw yevuh7ul4au t6yvna, -6 ,:oted to four resistors to form a simple circuit as syu6e owlv,vt-,a:u y4 ua 7hn6hown 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 simple cim0f;wos 97 vvhw46 asircuit as shown to the 7vh6m;a ioswsw 09vf4right.
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 zm2ih,hm.ccjz ydcib*w s5 k0/*c5 1z, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 2 . myb/z*w 5c0*ickch5zdih szc m1,jamperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, an i(7oc:,qx: syrr q2st6 kcho (x(h f0egdeal ammeter, a switch and three resistors are connected as shown. With the swtx0s:x c2y :gh,s6 rr 7cqkhof( qoe((itch 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 ammeywpnda *hs*wo3 1:( jmter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes.hnwaw *j o:m*(31 ydps
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit shown to the right, whbr ngu d:tz /(d5+8kytl)k:dt at is the equivalent resistance? Assume thz( kt yd)lttu:+ dg8d rkb:n/5at all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistanc, l. ahjf ox5-xdsgv5g7t9gt 4e of the circuit shown to the right with resistance g79t,fg.j5adx-g5 4s txolhvs $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows kex,/ oyf+t-y+1q qdt xj3- p b9we3csfive identical resistors connected in a combination series and fj-tpo13eek-bcxd x+y ,wts 3y/9qq+parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below j,8 .b*0z2(x2hlurgmm eym u yshows five identical resistors connected in a combination series and parallej,8m bgzm(l xh* mu2e 02yyru.l circuit 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. Whichv tdpk6y h( +dwtkxf(9.perq.-,n o x(qpb/c6 bulb will be the brre- ty k (co (qptx .,vddp6.+pfx9hq6k/(bnwightest?

  02.21: An ideal battery, an ideal ammsgd95 safn0:a./aaq xeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the x 5qn daa0sf9/:a. gsaammeter reads 2.0 amperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery,nea ,:)ixwx*b an ideal ammeter, a switch and three resistors are connected as shown. With the switabx*i,e: x)n wch 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 5xrzyx u /u8m8ideal ammeter, a switch and three resistors are connectx8z5u 8xury/ med as shown. 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?