16.09: In the circuit shown, an electric currenzlo(sm14l1ym n8b 0j1qehzn * t 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 interior of the res zh8oeq*(0b1 1jnmlzs1nlym4 istor?

  98.06: When any four resistors are connected in parallel,oz,m+okm:2k/ xnzdn myw9-6 /lqeni+ the_________each resistor inxl9qk6z: in/ omo+ ,m+ m2/kdzew-yns the same.

  06.33: A current through the thin filam if+(:4lpcjl/ v ia7 ze6uo6xdent wire of a lightbulb causes the filament to become white hot, while the larger wiri(i lu7p :dx6je 4c az6lfo/v+es connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. LED is the jvv;4 w;eqw g/yyeu,: a:ew ;qy/j4vgev yw;,u cronym for which one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectlk88gb8w o+x/ 4uoih zional 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 rk8 i 4b8hw/gl8ox ou+zatio of the new resistivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of -5e f+zca9r x d78gw(r5xdm uythe same material. Wire II has twice the diameter and twice the length of I. If I has resizxr dd5fm8g- (e 7 y5c+rxaw9ustance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diametfok) ley+ver;ta1( m( f 4t/lzer and half the length of wire X. If wire X hve( tkzf+orfta y/; 1)ell4 m(as a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. Thiqm4f-id85b gy tjb 6a7s piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance ombf85 6 g- t4bjda7yqif this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He 0ggk; vqgqytx/5 1z8(z qsmm1 decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at1(0zqxmz81gqqytv; s/mg5g k a given voltage?

  16.07: Three cylindrical resii)w ifmtr 46r7stors are made of the same material. The length and radius om7ri 6 ir)wft4f 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 ry06bh (scuea uj;7*)n b*ckh R, are connected to a battery in the following way: “Two resistors are connected in series. This combination of two resistors is connected inb a(*u hjuek y7n0 crb6ch*;s) 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 the accompanyinjb a .,bwv2g) q*.fpxeg circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistancb g.2.fea, jw*px)qb ve 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the ohoadnb1+a +z a u;pe ,2(hb,t6h4xg wcompound circuit shown to the right. The three bulbs 1, 2, and 3 - wbh+, n1uhgp h dzaxo2b4e;o , (t6a+arepresented 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.jilmj e v84m6 at the right. If the current in all three resistors is equal, which of the following s 6m8.4 eimjjvltatements must be true?

  99.37: The diagram at right representwdq2 z 5 2j5h+nmepc(ns a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulbz(5p2d hejcnqwmn+5 2 (or bulbs)
would you expect to be the brightest?

  00.03: Which of the f,(g 2u v3vkxehollowing statements is NOT true concerning the simple circuit shown whvx,khvgu 3e( 2ere resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbsclylop 96 1)eh X andY are connected 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 repreh1yce6l9 pl o)sents what is observed?

  06.34: How many coulombs h )x.gb84fumu+icrv/ will pass through the identified resistor in 5 secondsf8rx/i)u gmhv +4.cb u once the circuit was closed?

  00.23: If all of the resistors in the following (beej tuxbr8y8 4c;q8 simple circuit have the same resistance, whi8 u8t ebcjb8;re4qy(xch would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6.r j0lf *3mbxl.jk n/o44ey k0n0 Ω resistor is ylbo /r0kkjm. 4f0je3nxl* 4n 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in ser)u3ni,. ntturt/3 jmzies to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissijn 3 utt, ti/nm).zru3pates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connectjkxdr0+qp ojs 8ts++,ed in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 0 ojr ++t,+sspjqd8kxW. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What isnmn+x f4 0 7ulua(jr0d the maximum value ofu xl4rum7njfda(0n +0 the current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate 52 7vdvyiw z0 0gq0mgmat 120 volwvim0 v 02gzy0gq5dm7ts?

  03.09: How much current flows through a 4 ohm resistor that is dissipating 3a7yj92; bgssgbs1 r .q) z+rxe6 watts of power).2rqsebb ;jy1gz9a+g sx 7sr?

  05.21: A household iron used to ,*hc i b.8e5mze77i+ ygyn bnopress clothes is marked "120 volt, 600 watt.” In normal use, the current ie em*,bhi gyyn75.co8 7 nz+bin it is

  01.05: Which of the following resistances could NOT be produip-ccyd61y+u0ahl ,lw/pn w9 ced by a circuit containing only three identical 6Ω redlyplauh 0 1np-6+9, wccw iy/sistors?

  94.37: You are given three 1.0 Ω resistors. Which og wn7)7ayii89j 7n 0s)kjqz czf the following equivalent resistances C7wcn9zi7q js ) z87kigy0jna )ANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be connected togethbpgzwi j 2(s/a texoe,x91t ;0er in different configurations. If all three resistors are used in a circuit, how many different values of total resistance can be protxzoxw2; ea0b1(,s/p 9 gt ejiduced?

  97.35: When a single resistor is connected to a battery, a total power P is bz,fztafz )m8(zg x7eqq4 5b cc;csho 3bt ,04dissipated 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 rez z,( co 7fhq85q3 4b;btftmacb,e czz)0 4xgssistance of the battery is zero.

  96.16: When two resistors, having3h lonf,0 fkhpucww)w6ez( - zqfv2 3; resistance R1 and R2, are connected in parallel, the equivalent resistance of the cf3 f;3qn (u) ozcw0,e6vf-hpw2whklzombination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is ja7xfvm5;i u+ designed such that it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to warm 0.45 kg of u+mfv5aji x ;7water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor t.sep,n mv 4e/ghat is dissipating 36 watts of powv 4see .,g/mpner?

  01.24: An electric heater draws 13 amperes of curqmg2 o 2yb79hq vi:au;wun/ r1rent when connected to 120 volts. If 1unrq29yao2; wivu 7gm:b/ qhthe 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 cosc: yqloz0: 8m:puo0pu +:k dsnt to keep a 100W lightbulb lit continuously for 1 year at a rat0d0s zp::myl:uko+cq: 8p on ue of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results2yfz juq 2uf1v5fgcik2tvn 89/)dp)o in a power of 24.0)z c2fq8/p2 uvi9ujd215fkf nyov g)t W associated with the bulb. Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six ownsufx +i*5 tv3w+k vs8sa a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, wha s af83k*s+vwv5+x uitt is the maximum 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 circuipa *vwivsqc;t/pi1 4 8scw 46mt as shown to a8p w 4 qsitp*6wcvm 4i1/vsc;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 battwda8hrdjg 1 +myd 491lery is connected to four resistors to form a simple circuit as18 hdj4gdm+d9ay1wr l shown 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 switch and three resistomg prua5rz- a kk/nr8;n5dd )9rs are connected as shown. With the switch open as shown in the dnddru/5;-rnkzaag)p89rm k 5iagram 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, a7 : xzsbh0ho0zn ideal ammeter, a switch and three resistors are connected as shown. :h0b hx7s0zoz 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 amme.ug/xf7w7 kbh ter, a switch and three resistors are connected as shown. With thh 7/k wx7fg.bue 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?

  12.14: For the circuit showndc5do7 k7up- f 1c/sfu to the right, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all th7do 5pucc7ku/f fsd1- ree resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit ,ulkf8edb(*c-54pw bu l xa:q t jh:k7shown to the right with resistanfptakqc48l:*: lbj uw-kh,u e( 75dbxces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a coi1 /rler sng*f6/ruj1 mbination series and parallel circuit to a voljreiru/ /*fn s6rg l11tage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shdn24exdua;n n+f g0/ r 6c8qxpows five identical resistors connected in a combination series and parallel circuit to a voltage source.ud;0+acn2dqg fn4rn6/ e8x xp
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagr,m fzxx2*vq.;x l fcw4t5 vcu8am, all of the bulbs are identical. Which bulb will be the briuzqv2fvcxx *8 ;txmc. flw54,ghtest?

  02.21: An ideal battery, an ideal ammete-: 0illkf+xk br, a switch and three resistors are connectek+li xbkf0- :ld as 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, 2 y.z wc,skr.ba switch and three resistors are connected as shown. With the switch open as shown in the .rw 2cyb szk.,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, a4mq8scu2p,dc+ vt ;+wb ea7xyn ideal ammeter, a switch and three resistors are connected as shown.d+usvab,y82+x wce c p4; 7mqt 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?