16.09: In the circuit syg3p3 d7 )fv-cet x6oahown, 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 ey63focveg- ad xt7 p)3lectric field through the interior of the resistor?

  98.06: When any four resistors are 1-xsn ox8 j)4ln/op vyconnected in parallel, the_________each resistor is the sa/nojsovypxl8x 14-n ) me.

  06.33: A current through the thin filament wire of a ligh c.tmmeqqpo : ypqko:0a(6 y(8tbulb causes the filament to become wo qam8qmy (ypp0t:oe(kcq .:6 hite hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lighrlvox ,ja s2rmzc0/) 3ts are being replaced with LEDs. LED is the acronym for which one of the following 3o 0 /majzxrclr) ,s2vchoices?

  05.16: A cylindrical graphite resistor has length L and 0m9 o7 yhrhu8skg9k-w 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 resistivity9 u-wysohkg 87k 09mhr to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same material. Wire IIx)t1 c.k+p-m 5 n+1k6hva8nozhfmjwb has twice the diameter and twice the length of I. If I has resi8615z+.b+hkonx c) kmpwmav jh- fnt1 stance R, II has resistance

  99.31: Wire Y is made of the same materi ncq -qi3(r/jyr* m.lp,t0n4sb/mfbaga0;ng al but has twice the diameter and half the length of rpgt/ 4, 0ajsl/gbf nbqai.3- (mnnqrm;y *0cwire X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has ezr69(uluay2y0r+;l/c89e wo abk r llength L and radius r. This piece of material is then drawn so that it is lu6+r8klu2 /0 a;9cayzrb rey(9l weo 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 make ,o 25rsbsjth( a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb pro5b(h jrss2t o,duce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same matl8. znncnqpn 2 k(7,r):e hesnerial. The length and radius ofz782en:erl qsn, nchkn(n)p . 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 rs4yn+w( t cu7qesistance 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 c+tcnquy4(7s wonnected in series to a fourth resistor.” What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying ctzf: 7qm1 1akiircuit diagram has internal resistance 10.0 kW and the ammeter has internal ik1q:az1mf 7t 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 the right.3g;i lmgcvno (6hw((t The three bulbs 1, 2, and wnt (mh;(ov3clgi6g ( 3 - 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 circuit at the right. If the currentc4 evf9sw5 vw)af7j8t in all three resistors is equal, w4v af8 )we7j5wsc 9fvthich of the following statements must be true?

  99.37: The diagram at right represents a simple electric cirelr/+;e( v ibscuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb (;(se/+ i bvleror bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concernin qtebuc(1ph,:)lsb+ p g the simple circuit shown where resistors R1, R2 and R3 are have equal peucs: hl,b1+(t)b qp resistances?

  17.29: Two lightbulbs X andY are connected in series to a batteayn m6 ur;kd.4ry. 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 choicu4nkrm da6.y ;es best represents what is observed?

  06.34: How many coulombs will pass through the identified resi7 a )kz 5sd5lnk* tlgguh*0az,stor in 5 secondgz ulktlk han50*5)agd ,7sz *s once the circuit was closed?

  00.23: If all of the resistors in the foll1 n,up jjdj(*d+d,hxinbky*2 i)s tc7owing simple circuit have the same resistance, which would dissipate d pji2n )7*(hcidn,,kb*xsuyjd +tj1the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6.r 1hci.-wh*xr+65 c3h pjn cxo0 Ω resistor is 5h3rrnh 1.x*xh 6c+c- jpiocw 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a n sx3s3k1jg ira8,g vcb/ 5h5fbattery. 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 voltai3g5cb1a3f k 5vss8h/jgrn,xge across R3?

  99.40: Three different resistors R1, R2 adbift* x ..dia1ji8y,ndR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6,xyjabt fi8* d1 i..id W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What is the maxiz .msuy d9l2a5mum value of the current under theseda5 us2lm9 y.z conditions?

  99.23: What is the resistance of a 60 wat8dlp :d5uq) a7afb6j9ho :1opcy. jovt lightbulb designed to operate at 120 vv yoo76f.h d 95:l)u j1poaq8pcjb:adolts?

  03.09: How much current flows through a 4 ohm resistor that is dissipatingh; tkuw rr54g byad02) 36 watts of;rdh)y4 twau b02rk5 g power?

  05.21: A household irogsfs/;6pwmb)w w ap.3 n used to press clothes is marked "120 volt, 600 watt.” In normal use, the cur 3s.m)gpwba/s6 ; fwpwrent in it is

  01.05: Which of the following resistances co4-nun y r thkmj 0r7:gn4me,tm51*dnuuld NOT be produced by a circuit containing only three identm g 4nt -ntkhm4mru7d nn:0euj ,y5*1rical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following equivale :lo wv6/qny9l7etbx;0j 119r iuxjdgcsb21 z nt resistances CA jy26ozd t99slbbxuwe0 / xlqg;n7i1r j:1vc1NNOT be produced using all three resistors?

  02.06: Three resistors of different values cg pwpsx5+e93 )eawz;san be connected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistance can wsp xa+p5);sz w3 e9gebe produced?

  97.35: When a single resistor is connected to a bax20z jv1p+3 zb,x3sy3g7m+lopus/ g*m ci xr sttery, a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistors acp0/ssu++* bx3ozzgsm rx,mpjgvyxl3i 7 1 32re connected in series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2c0:xkzdtido+k nc81 ;v .x *ez, are connected in parallel, the equivalent resistance of the combination is 5Ω . Whi +x0nzd1 o:kic8c*zd .xv ek;tch of the following statements about the resistances is correct?

  02.46: A hotplate is des1(wj/ y 0c9 myd/xfeidigned such that it has a resistance of 12Ω when operating at 120 volts. What is(jy d9mx/ yi0fe1dw/c 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 )d;7kdulq8ntq34*hboau mu0u 8y2q c3up- dzis dissipating 36 watts of7zq4lm yd0 dbcq8u2qd; )pua 3tn*u- kou3u8h power?

  01.24: An electric heater draws 13 amperes of current when connected to 120 vol. apuo2mnsj,;xdai e2ndi 4. +ts. Ifjm.,odai2 du ai4np e+;x.s2n 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 l pdjx ,3pybsiyq:m j: n2.g60qightbulb lit continuously for 1 year at a rate oq.x2j0:j,dsp6yinp b3m:g qy f $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in a power o :qdhh8id)ft r0t7-h vf 24.0 W associated with the bulb. Which one of the following choices :dt hh) 0t8dfi qr7-hvbest represents the resistance of the lightbulb?

  01.10: Each member of a family of snq/ /snu3etopjmu7c /. m:nc,ix owns a computer rated at 500 watts in a 120 V circuit nem,m /j7p.nqnucto/:su /3c. If all 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 fou u,vki 4bm-kt3l/jxt: r resistors to form a simple circuit as shown to the right.l,k/ -tk:jvx3b4tium
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 : a)jvno vz.;xto form a simple circuit as shown to the rigj.)z vanx;:voht.
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 resistor9l ,k/qp241 - zl xdjvi :yklc)tntdn)s are connected as shown. With the switch open as shown in the d lqt 9cdnxik4z,2:v k yp)-lj1nl/t )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 resistors are conn)ep mht ./)dsihs)/ . ied)ptmected as shown. 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 are ciy m1 fopcsi03 d 1c,y*2znhf5onnected as shown. With the s5izmo1yhnfy* pdi 3 cf ,s2c01witch 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?

  12.14: For the circuit shown to the right, what is the equivalent resistanceq ;ce +acz3t0i? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identic3 zq+;ce0c taial resistance R.

  09.07: The equivalent resistance of the c/m (fi c(ua6eeircuit shown to the right with resistance/fui6(a m (eecs $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below 4 w4t zzggio (l0bgzpos65/9vshows five identical resistors connected in a combination series and parallel circuit tos6wv(0 tz bz/z9ig5ggol 4po4 a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connecte;snsgslp wzaq0 :)8.rd in a combination sepnss8w ; l) zgrs:q0a.ries and parallel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit +nn 5tipgf-;27n (4pq mypbsuf8 k,at diagram, all of the bulbs are identical. Which bulb will be the brightp,n fpytkmn+nqu i87 -bf2a5t(gps4;est?

  02.21: An ideal battery, an ideal ammeter, a switch5stge+6j,1tcoz2s fd )obwz6p b v4(t and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 am4+vzs5)(w6bfge to1,2 6zcs jtbdto pperes.
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 arcui. zzl 8,by5e connected as shown. With the switch open as shown in the diagram the ammeter reads8l bczizu .y5, 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 resistors3po4ofbi k/ cd,q2-q r are connected as shown. With the switch open as shown in the diagram r-k23d,4c/ obf oiqpq the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?