16.09: In the circuit shown, an electrici,ip +* vbqo36s:okqr kx xc;5 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 directib65xciv kx,+qros3: qiok*;p on of the electric field through the interior of the resistor?

  98.06: When any four resistors are connected in parallel, the_________+l penss u h9n/ht 3:shfj2d(+each resistol3fdet s+nhs2 9u+npjs/h:h(r is the same.

  06.33: A current through the thin filament wire of a lightb *g3(f3aj: t7fl jfsjxulb causes the filament to become white hot,*j3(lfs f:ajf37jt gx while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDso:lhri1e 3j,j . LED is the acronym for which one of the followin, jh3le orij:1g choices?

  05.16: A cylindrical graphite resis9*hzr hh+hrm v3t:w 8utor 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 twruh rhv h3+tm:*8h9 zo the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same ma9 sg t.izfe7go/cl n5-;2c amfterial. Wire II has twice the diameter and twice the length of I. If I has resizff7gl2 - g;9to/na. ceis c5mstance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diameter a.bz2 ub(t v:kmnd half the length of wire X. If wire X has a resistance of R then wiztu2v .mkb :b(re Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius rr7lbvd43l l/lxs .7 lf. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to 47l r .7l vbf/l3ldlxsthe resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bv, 0scld0;;me z1 h+kwb psp)iulb. He decides to modify the filament. pwi b0mpevz ; h;,c)s+0s lk1dHow 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 rlt e 6 ztvw6i+kg)7z:vesistors are made of the same material. The length and radi6+ vi7k6ezlzt )tg w:vus 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 cogu/8 u,6uftffnnected to a battery in the following way: “Two resistors are connected in series. This combination of two resistors is connected in parallel to a thirdf8u/t6u ufg f, 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 diag 17dg :s)hwonq5 e. qrgcfto4 vjj;o+(ram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0s e)v:4j1nr cfwt+(;oj5go7qhgq do. ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound c-h h,nug5 /zb8b6ginrircuit shown to the right. The three bulbs 1, 2, and 3 - represented as resistors in the diagra h,gi8nu gbn65z/-hb rm
- 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 n+5d+ wrv ou;ij/dz/b nw+x .jcurrent in all three resistors is equal, which of the folovn.+dujjwb;nix/w + r5zd/+lowing statements must be true?

  99.37: The diagram at right represents a simple electroyc(gaizfm .t r.,9el -in6. ric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb r ecnzri ,if(t y-g.m.l. 69oa(or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the simple hl+ :m dnsle0-ggu okwo9 y172circuit shown where resistors R1, ud1 s7 -: h9y0klgmgloe+o wn2R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are coni j+0w*ixbc7 1mkv 29 yu3hztj9 jtm,znected in series to a battery. Bulb X is brighter than bulb Y. Assume all circuit elementi1tiv 9jx h09 m*zw7bc z+,yku3mjtj2 s 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 thsqaq ,.:3pm die identified resistor in 5 seconds once the circuit was clo.piaqd3:qm,s sed?

  00.23: If all of the resistors in the following sipaw1 - n txi;y ,)xh2sjva7)ecmple circuit have the same resistance, which would dissipate the greatest power)psaiyj te7;v1 ),wc axxn2h- ?

  98.34: In the accompanying circuit diagram, 8+ ep*n/ybb rmkxa :fls3s64s the current through the 6.0 Ω resistor is 1.0 A. What is the power supply voltage Vs x ay:rn6bmb4se 3skp8*/lf+?

  97.27: Three resistors R1p8pde ,rd7a.4k /q( yfis qt-gh)cz*n, 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, an )tizchn7/ prske(y,qg *p8adq4f. d- d R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are pp nw38 2daa iu9m(g hcg8rz:6connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is wdz 6a 239gupi:amnr8g c(h 8pthe current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What is tht3hyvai2ndk*0j 7f u8e maximum value of the currkvuyh7nj20d8 i3f *a tent under these conditions?

  99.23: What is the resistance of a 60 watt lighth0-z5)w kfgks bd p93gbulb designed to operate at 120 vggh 53)z-sdk9pk f0wbolts?

  03.09: How much current flows through a 4 ohm resistor that is dissipating jyxz /ce w42(j36 watts of powerj(x2ce4 z/wyj?

  05.21: A household iron used to press clothes is marked "120 volt, 600 watt iy;zit*sj8 .yi/iaj(zqa2, a.” In normal use, (/ya ia.iyj; tji *,82sai zqzthe current in it is

  01.05: Which of the following resistances could NOT be produced by a cmje5n;0ld pu.qtpe wo+l).z sx r*.u.ircuit containing only three identicq t.r jeop)xm.p5sl0n.e* .lw;zd+ uual 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the fn+h7l( y9l7vqcs lk )j,*d qitollowing equivalent resistances CANNOT be prllkq+ )7(cn 7js*,9tv hqdylioduced using all three resistors?

  02.06: Three resistors of different values can be connected together in diffx0a 8se53ntfc erent configurations. If all three resistors are used in a circuit, how many different values of total resistance can be produce5taec x f038snd?

  97.35: When a single resistor is connected to a battery, ;spf6i wrfstxu.(. y,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 batte ir.psfyuw. 6(,tsf;xry? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and z*; :xpmxl to le-kssiu461+gR2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resistanlzgxt16;s:+-uo ep*ms ixlk 4ces is correct?

  02.46: A hotplate is designed such that im)mti;v7a, sit has a resistance of 12Ω when operating at 120 volts. What is the min sv ;m,)tia7miimum 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 ty; /a0mlkc)ifhrough a 4 ohm resistor that is dissipating 36 watts akc/ylmi0 ;)fof power?

  01.24: An electric heater draws 13 amperes of current when connected to 1u qv3oov 0:b9ah1tqg *20 volts. Ifgqvho03 ot91abvq*: u 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 ktf ;:7kp jya(keep a 100W lightbulb lit continuously for 1 year at a 7py:akt f(j;k rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A throug9m6hi +fk2, mdufql x*5mkoh 9h a lightbulb results in a power of 24.0 W associated with the bulb. Whkf6qkx l mu*d52i m9hmof9+h,ich 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 watlv9+f6cv, ydwub 7 op/x( 4lv.9jnrqt ts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, what is the maxim6l vxvfw9q (nltubc +,p/7.yj 4orvd9um number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resistors to form a simple (imh96bods -eg 6b/d gcircuit as shh 9bd/ i(ggm6b-ed6soown 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 batteryo4ip1svp vslz*voi+ de5uv5t2a) g0; is connected to four resistors to form a simple circuit as shown to tsl5gv45d*; a vot s2vvp)e10 poz+iiuhe 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 switch and thrtw )jp4 *kwhkp+ 057zj xpgq1bee resistors are connected as shown. Withjb0p5wpwh* +kp t zgqx)17 j4k 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 batte5 yz-aw-ijf9 bry, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the-bzywfaij59 - 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 thryvo h.gamyxmm) wl ft/j/*h8,g 65h6 gee resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperemfhh a ty6)wh m68jgxg5 l/ym *gvo,./s.
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 hk1wz(c pmv/)oy+t i33nk lw: resistance? Assump)l nchw 1 mwyvo/zk(k3+3t:i e that all 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 2sgprea7s9.qge/sy w 0 ohtpnr gue81/ i921oshown to the right with resistaas.spgohn/9qug2s18 r7we t1g i/pyo 209eernces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a combi.my6 h vre*oa1dy2w;fnation series and parallel cvoafy; h2 .ew m1rdy*6ircuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below; y 7gn:d up9z 7be+ r1ra0lhd6xlip:x shows five identical resistors connected in a combination series and parallel circuit:r17 6pirx u bpd0z ;agn+9lyhx:eld7 to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, t8s):7 a1ffi kpxut3 gall of the bulbs are identical. Which bulb will b k x87g1:sfftaupit)3e the brightest?

  02.21: An ideal batterrhw5hgm9iti p-z-7 z xe/mq 94y, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0e h imw gr9hqpx7z-z9/m 5-i4t 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 conb*ql t/. b yn9gvn:nx6nected as shown. With the switch open as shown in the diagram the ammeter rl*q9xvnnyb.t/:b 6gn eads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery,tz .h4b/p -u6vrms6lgm psn14 an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in mpn1-4z 6mb p4ssr hg.t/u6vlthe diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?