16.09: In the circuit shk7m86s8a7)-6f ,1h n ouotpvs uqdixdown, 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 the interio n p8ths7uudfxk1d67,6)q oas 8mvoi -r of the resistor?

  98.06: When any four resistors are connected in parallel, the_________each remcm6d 5 +zhpc;sistor is thedcp65hm +m c;z same.

  06.33: A current through the thin filament wire of a li3k1dzp othk. (e ,fif6ghtbulb causes the filament to become white ho(ofkkzd1, i ptf6eh. 3t, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights arlh-e/ e l)2z;qfksb6m e being replaced with LEDs. LED is the acronym for which one of the following choi2q6zeh)fl- mkb;sl/ eces?

  05.16: A cylindrical graphite resistor has length L and cross-sectional area w/j2v,5wakj h57ikan2 1sjea 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 t2h1jaav kwwj5 ne7ja5/ ,sk2io the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are *-z7btuix.vchp 6l( amade of the same material. Wire II has twice the diameter and twice the length of I. If I ha6azbhvx lt -pic7* u(.s resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the dirnsx2 h) qrg x1h1-; 7u.ndjtoameter and half the leu)hoh 2x tr x7r;ng.-js d1n1qngth of wire X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. Thispltbmk i)j 952u;fp kz -(g j-blsv/;q piece 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 processkju;2j s/b;f5 b piq9tp)-l- (zglmvk?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. :j/6c e/ .hhr* dwuw ap;d,yvtHe decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more li6 e/hdjy*/t.:v rd,wwcp hu;aght at a given voltage?

  16.07: Three cylindrical resistors are made of the same n,(lyp 8rdfz/,z dnf0 material. The length and radius of each resistor isyrzn/n ,df,pld(8f0 z:
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 the fcjmt3oc8 n3* :/rt yoyollowing 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 arrangem*t/3m:rc c8on3yjtyoent of four resistors?

  95.35: The voltmeter in the accompanying circuit diagram has internal resista 6f)9 ed7,hovk l6eo x8x.faaence 10.0 kW and the ammeter has internal re ae86kod xvffl9 6o xe7h.,a)esistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit s1kicy6m u64;g/qg6dub- d hlos,e6eehown to the right. The three bulbs 1, 2, and 3 - represented as resistors 6;ok6e4ec ugdmi6/dbuyh g-1e6 l,qsin 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 ele b j5p2etcom70zr (bnx0x, wm6ctrical circuit at the right. If the current in all three resistors is equal, which of the following statezxbj rob0 nx 57c0mp2m(wt,6ements must be true?

  99.37: The diagram at right represents a simple electric circuit composed ow :0tlfzbn3h3 d,2w*lr . ogof4dft1 ef 5 identicah nb f0w,od:23f3dg 4otz.ellf *1twrl light bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning theqq fxw1)w ,wzimc)n (0 simple circuit shown where re0wqnc )q(z w)i, mx1wfsistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY :jmjgj2. m8b sdpfl5e)mr(y+w/ ;id0 pcwu*lare connected in series to a battery. Bulb X is brighter than bdr(jpb jfmem/d g2+0wjpwcu5.s iy:;*l 8lm)ulb 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 is observed?

  06.34: How many cou mp7 +tks,0jyv*x,mrelombs will pass through the identified resistor in 5,0met +mjrsv, y*xkp 7 seconds once the circuit was closed?

  00.23: If all of the resistors in the following simpl-t 0b zvpxnz(r5d7jrl-d:x l5 ojf9 i6e circuit have the same resistance, which would dissipate the greatest power9 67f(vj50zozrr-jnpldx b-x:5 ldti?

  98.34: In the accompanyiui *lsb*u m45e b,d(iung circuit diagram, the current through the 6.0 Ω resisto b4 *d(ie,msbuului*5 r is 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, anurl:t- 7+ /kxmo tje:ud R3 are connected in series to a battery. Suppose R1 carries a: r +jt/umoxt-e ku7:l current 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 resistorseswj: (sfkz ;my0z y)8 R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W.e;z)jw kfs( z80s:yy m What is the current in R3?

  99.13: A heating coil is rated 120o6d sdj 9.f5oq.v *ugo0 watts and 120 volts. What is the maximum value of the current uds.ug f*qo o6j9.dov 5nder these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to;hax7whsx4:)m+xzeyc d m. n 1 operate at 120 volts?han yxs m)1xcwmh. d;x:e7+z4

  03.09: How much current flows through a 4 oy j* o1hxl8po7hm resistor that is dissipating 36 watts of powe*hp ox81y 7ljor?

  05.21: A household iron used to press clothes is marked "120 volt, 600 watt.”(6 f9miawnu.d48hamcl)qy (b;jn: mx In normal use, the curre;:di6c 8y)jlnm.qanb94uw (ma hx(mfnt in it is

  01.05: Which of the following resistances could NOT be produciz*9 s0 xgn1zied by a circuit containing only three identical zz i9*xn01g is6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the f2,+lfnrmhs pt9nz 88ou/x* l uollowing equivalent resistance9r p/t+z 2,8ullmfn s 8hnuo*xs CANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be connected bqfz p9987 (n94teis5j eldrltogether in different configurations. If all three resistors are used in a circuit, how many different values of total resistancpf7 relbzil999st5d 4(je8qn e can be produced?

  97.35: When a single resistor is connected to a battery9 goi2r70l /jq/ h tiox6gtn/i, 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 using the same battery? Assume the internal resistance of the battery is zerog26tlh g9tnr /j qi0oi/x 7oi/.

  96.16: When two resistors, having resis1*dmw n.x6(o 2ui4rkw4 ko a ow6p/sxptance R1 and R2, are connected in parallel, the equivalent resistance of the combinatia*i4.kn61os/ ( 6xupwm2dpr4wo xkow on 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 when o*:ocjto*2t e9 wnnq geuc10: qperating at 120 volts. What is the minimum amount of time that it would takj* n 02c::ne9tu*qw1q tecooge to warm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows th rg*m;z w f40 o1jfrlers5x:s2rough a 4 ohm resistor that is dissipating 36 watts of mro gxrj5*srs f2zf4ew;10: lpower?

  01.24: An electric heater draws 13 amperes of current when connqhzt -5s/ :th;x rayj-ected to 120 volts. I hhr ty-/tj:5sz-;x aqf 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 l; vapi tx56)1q4ddcph 19rcpf it continuously for 1 yea65 r1; pavfc pddt91ipq x4h)cr at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in a power of 2 )xm3 i.afu9v-v k4yd(enrbl 64.0 W associated with the bulb. Which one of the following choices best represe6-.3l9 vrbidvyun(kma xfe4)nts the resistance of the lightbulb?

  01.10: Each member of a family of six owns 7 v* zduclz 3-60jev 3v*yoinda computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere6 3z0-ovv*lezvnd3icjd*7u y fuse, what is the maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to j1dqh3rxr p arh2+vxjo e104wsb3/z/ four resistors to form a simple circuit a o 3+11d2vhsh r0bqxe3j4z//xr w jarps 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 simple circuit 8yy 9rx3dah;q as showyqd93yh ar8 x;n 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 sw sowvu 2ay-.u-itch and three resistors are connected a.y2-asv wu u-os shown. With the 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 and three resijf0n iu3u, rhoyw/tcs)max4 (89 -fsystors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0rujscuf,4( imx s )0 n93yot-wh f/y8a 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 xmob6kglt 7u)l/oes+9a(b q7are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 9to s ug)lbmlbak/e77q6( ox +amperes.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit shown to the right, ;:ea-x+8b4mamuz ionn; am 0b what is the equivalent resistance? Assume that alaum:+xiomz;;4bba 8 n-0e amnl wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right witlxv,w2;.p7zgfw8 rrej( 4xt* bu i7qah resista; pfub82 x z4trj*,wa(q v l7.ge7ixwrnces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a combinatoxcv9j/x2i u3zsuj3, ion series and pajj23oc/xsu, 9vzx3 iu rallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows fivewc/wts(y qa ++ identical resistors connected in a combinationc w(q/t+y+wa s series and parallel 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 au5l-mv9y9ht 51di bzg )gm.djg 7q;hn re identical. Which bulb wiq 51gh.iu9 gzv)5 9j-nltbmgdh m yd7;ll be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors a sb8we9q18goydoe:bilv) 4.0 bx x5gire connected as shown. With the switc0xbwoi)89qoi gv :b sble5y g .x14d8eh 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 thrj0kwztm9 n l7/m)ger 1ee resistors are connected as shown. With the switch open as shown in nm l e)1z7wt j/m0r9kgthe 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 i 3iay2-8gtkl odeal ammeter, a switch and three resistors are connected3y k 8ltagi2o- 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?