16.09: In the circuit sh ;deovs2. /*c2nse dboih5uu+own, 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 throug cin;do e/+5sdh2s*bu .evo2 uh the interior of the resistor?

  98.06: When any four resistors are connected in parallel, the-,/ tdve5 t oaxhm/fh._________each resistor ist/ vmoh. -e5dhfa /t,x the same.

  06.33: A current through the thin filament wire of a lightbulb vy* 0mq ooxhcy7/c:;k 2*k skvcauses the filament to become white hot, while the lar/cv7ko vk:*so0h;mc y2 k *yqxger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. LED is z 7/5n srdrb6sthe acronym for which one of the follnsrds5 6b7 /rzowing choices?

  05.16: A cylindrical graphite resistor has length L and cros(zjgjr8 p ,s0 defj+l8s-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 ijj8zl rps0( fde8+jg ,s the ratio of the new resistivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same mb8z tluuk( 8 xypf2v.(aterial. Wire II has twice the diam bxt8p((fuvyz.k2l8u eter and twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of tyg kgerq)l 63/he same material but has twice the diameter and half the length of wire X. If wire X has a resistance r/)3lye6qggkof R then wire Y would have a resistance of

  03.23: A cylindrical o 2ffie 5sg0v8resistor has 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 resista8 v0ieo2 sf5fgnce of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighterk; d:g-cvujlb.. i vecihd*ntad y w/e5z12+3 light bulb. He decides to modify the filament. How should the filament of a lightbulb be modifi*a/wlh yedi 3v2u: zctvgeb.-+k;i c dndj15.ed in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same materiala);*hl:nc nzm. The length and radius of each resis* cl;:nzm)anhtor 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, uoj60r7q 2q ubare connected to a battery in the follouu 0rq26bqj7 owing 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 arrangement of four resistors?

  95.35: The voltmeter in tx+ c*1gj llbd(he accompanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. 1bg c*dl+ j(xlThe voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The three bulbs 1u +jajynlr(ccnw,) ;.g zzl54, 2, and 3 - represented asg4u; +l) 5rjz. ay nwzjcn(,cl 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 tha (fo39g vroxkuro/g+: j pb,1e current in all three resistors is equal, w:+v3,oo1kp ggru9x/r fao(bjhich of the following statements must be true?

  99.37: The diagram at right represents a sfzvy mx/9n52 mimple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb (or yv95/ 2xmzfnm bulbs)
would you expect to be the brightest?

  00.03: Which of the following stah zd1z.fvsu,y w+,o f.v(noq0 tements is NOT true concerning the simple circuit shown where resistors R1, R2 and R3vsq zv.oyuf+wn. fo1h(0 ,,d z are have equal resistances?

  17.29: Two lightbulbs X andY are connected if11 yh1w r ki xxv2sovnh(9 7nhq2h7i:n series to a battery. Bulb X is brighter than bulb Y. Assume all circuit elx7y2s h(o fwh:7nvx9ni1 vh1 rihk12 qements 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 throughix ektxa: -/w qb.c(64e9vrw y the identified resistor in 5 seconds once the circuitaik64xwr qetvw9 - (/.x y:ebc was closed?

  00.23: If all of the resistors k(n;j14bf ep rem/8vv in the following simple circuit have the sam(/;4 mef 1brnkv8 pjvee resistance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, tmbk 6i4,:nc skrgk-g*he current through the 6.0 Ω resistor is 1.0 A.bkikk 46*,cgg r:n- sm What is the power supply voltage V?

  97.27: Three resistors p6:o.oac b(nm30uvnz 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 tz uoov0:3(nca n6p.mb he voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in paraqh,(aj) xgk+q 0 ynmby .+gcp8llel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current inq( + , 8qjyya.pxmk +0cnhggb) R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. l6 0-cdrer,v sWhat is the maximum valu rr06, es-lcvde of the current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate at p8 (f:1eb) ,n 4zrbgw/mp/yj:cplodc 120 voltsn/yo(8wprde4pf/cbml :)gz p: b c1j, ?

  03.09: How much current flows through a 4 ohm res:liul;/bo/y92*qlna1sfj v 9honz d,istor that is dissipating 36 watts of power?;yoils2zb9 qj*d/l:1l 9unho/avf ,n

  05.21: A household iron used to press clothes is marked "120 volt, 600 watwm+1ujxzfa. 1/-pxlof6g mz )t.” In normal use, the current in it if1 /m-zf oxwu x6)gzm1a +jl.ps

  01.05: Which of the following resistances could NOT be pro: jhy,7f/f4ga l re8l8d hpk-kduced by a circuit containing only three identi7klpg,d l-kj: /ar hfyfh8 e84cal 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following e l,3ju*8fbielp . ktm;quivalent resistances CANNOT be produced using all three em *kbu,p fli3.tj;l8resistors?

  02.06: Three resistors of different values can be connected tog,tbjsf du/jq; ob5 *a)wpbe* :ether in different configurations. If all three resistors are used in a circuit, howatdb qs b*;fwbju ,5p/ :o)e*j many different values of total resistance can be produced?

  97.35: When a single resistor is connected to a battery, a total power P p(mkwp0::se gis 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 intersm(pwek:0gp : nal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1nf z. e/p: 4mnr6rh/52rz xcvx and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following st:r xrnm/4hx 6pcezr .2v/5fznatements about the resistances is correct?

  02.46: A hotplate is designed suc1u m d32u3tjplh that it has a resistance of 12Ω when operating 3l1umj3p2 td uat 120 volts. What is 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 is dissipating 36 walfm6r7 2hljmmee9 n bucy -:5-tts of powf2mn9ry-:l 5lme- bc me76uhjer?

  01.24: An electric heater drawlg y56z2fci gyhlmb y6iw082/m4 4aves 13 amperes of current when connected to 120 volts. If the pri ag w vm4hie6/fg2 25l680myiy4blc yzce 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 lightbul+ 6ehs :g2gkvpb lit continuously for 1 year at a rate6v2pse:hk gg + of $0.10/(kW.hr) ?

  12.09: A constant current o l+6cvbtbec8d /mznto8uu ,n4 l,1da+f 4.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. Wod ecdlb6ttbcn8 a4u8, +zvu+n/ 1l,mhich 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 50y do1dslr7// 9sldy dah9( xw(0 watts in a 120 V circuit. If all computers are plugged into a single cidl/h d 9ls ysr1/y o7(xwdda(9rcuit 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 resistow*+ws dy4- ;unvbii7pnrmf6 3rs to form a simple circuit as shown tw-wr; 4 p6 niid7fm3*bnu s+vyo 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 is1prvuz 8sr1v:4ejpqw2 n o)z*ec.y)m connected to four resistors to form a simple circuit as s:o21mrc8y jpq)zv.e*zn4wr ep)sv u1hown 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 iddvha h waab558w *onn12 wuc43ax/o7peal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diag *c 81hwa2 adawbx nvhn5a 457wop/o3uram 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 andcw stnfv df pgmp(972qq 29h-( three resistors are connected as shown. With the switch open as sq(-99 q c2p2gdn(pfvswtm7fh hown 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 re 7,9dnocpt/c psistors are connected as shown. With the switch open as shown in the diagram the ammecppt,nc /do 97ter 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 rig hsm..1hnji:y-63 c 8cvcj:quxi5j1a7d ha nuht, what is the equivalent resistance? Assume that all wires are ide-diav jj1i6uc7:c.uc:5nqsmyjha n.8 3x1 h h al, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent 5 mgxy0l,+n3a 5fynp1 r7tj pcresistance of the circuit shown to the right with resyg5cn3ytpmnjf0x+1ap7l, 5r istances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected iq*ipiid3uu:;/v/zd in a combination series and parallpqi ;:/uid3 vidz/ui*el circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connecit.dgme,2n j3bz- qi9a3fek5 cle q-*9yr2x kted in a combination series and parallel circu 5e*lfi jeq.d qaeixzmrg-2 3t2n c9kky,b39 -it to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit dmvj7gynz3z/i n :.o+sj2+umgiagram, all of the bulbs are identical. Which bulb wiloszvjmi/nj un+.32 z7ymg: +gl be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and threoext1tr3jvg4o +.(a8 ac 6id le resistors are connected as shown. With the switch open as shown in o.3+1 leta4 8xgcatio dj(6rv 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 resistors arb,.l, hevmc2j2+x nrfe connected as shown. With the switch open as shown in the dm v el+, 2.cxhnjr2b,fiagram 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, ) 74gz4:6lws usy0 (a5as-s tdpnvcjda switch and three resistors are connected as shown. With the switch open as shown in the diagram the amm-s5pd4:6nsut0 a7 v )( lzsjsy4cgwadeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?