16.09: In the circuit shown, an electric currenpyo4) 6 p:utf h5vi6u24qu)grhc y*btt exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction fc6h 4 5r y4 )ui 6pg2y:opvu)btquht*of electron flow through the resistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are connecd to1 mfiw,5z:ted in parallel, the_________each resistor i:5,zfit md 1wos the same.

  06.33: A current through the thin fxx.j-sv mod *b .ui79hilament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain muchso*b97jx-.hvxi md.u cooler. This happens because

  13.08: Some standard hoqxs ehdlx7 /4*usehold lights are being replaced with LEDs. LED is the acronym for/7xle4 sdx*hq which one of the following choices?

  05.16: A cylindrical graphite resistor hakz ( i1y *+tff ae3o,ed5xinv8s 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 to the old resistivity of the cylindrical resisi3fdk(*+ 1i e8 nae5tz yvf,xotor?

  98.20: Wire I and wire II at8iqp f2(.3zl9.d otkn3wklrre made of the same material. Wire II has twice the diametek nrl3p 9 .z28oqfiw3tl t.d(kr and twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same materi vvod,3m58yz+d dz euthy 3mq64cr4+:)paapwal but has twice the diameter and half the length of wire X. If wire X has a resistance of R then wire Y would have a resistanced4vh vpe p :wqt5a,am yzr8moy+dc+3z36)4 u d of

  03.23: A cylindrical resistor has length L and radius r. This piece of mve j)e2og (jz7aterial is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this material because of this proces(og7jj eve z2)s?

  07.27: A junior Thomas Edison wants tz1yn*q/y 9i8 bpc -hryo make a brighter light bulb. He decides to modify the filament. How should the filyq8-*ncpy /yz 1bi9r hament of a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same material. The l5p . *8uj5zczc:qxqu 7.ppw m+bh,v rwength and radius of ea. c+,*m uqquzvr 8 5hbw zjpp7xcw5.:pch 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 connected to a battery in hd+zug)u olo3e b1do35 0.p+ gzmeh;ethe following way: “Two resistors are connected in series. This combination of two resistors is connecteh.5o dezg ho3)3o;pe 0++ulzmbe 1dugd 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 the accom;nm0m x *ir3r+6puuo6au9l u ppanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter readingm + 9ap6o3i0mlxu6 ru;nupr*u is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the c0e*1a : tfzjilompound circuit shown to the right. The three bulbs 1, 2, and 3 -ft:ea1*j0 li z 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 t/ rggh) ht2wl(07exp ihe right. If the current in all three resistors is equal, whichg7wxi)pgt2l r(h0e /h of the following statements must be true?

  99.37: The diagram at right represents p o)o0lqkvo; ug2n4c8a simple electric circuit composed of 5 identical light bulbs and 2 flashl2c80 koqo;op vn)gu4light cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concera++dat yn 35*oox2 vsjhq,-t pning the simple circuit shown wh +yts 2 aj+qx,hd*3at5oopv- nere resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X is brizuzhpk40u( efa 57b6 eghter 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( aeb4zz 07h5pfu6eku represents what is observed?

  06.34: How many coulombs will pass through zf5y-he 1fp 7, hc6fab+ueb/b the identified resistor in 5 seconds cefhfbbz 7b-+fe/ u65h1 ya p, once the circuit was closed?

  00.23: If all of the resistors i)s2pmj:l/g (3 uurjkq n the following simple circuit have the same resistance, which would dissipate the greatest2u3 s m( g:/jqjlkupr) power?

  98.34: In the accompanying circuit diagram, the current through th,o yp b,)mf1bre 6.0 Ω resistor is 1.0 A. What i)bbo, ,y frp1ms the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to ks3+q(59q hx qvofi4 ly2h9kd a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.if q9hq x4v3d(k9y+k5h oslq20Ω, and R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in parallel to a bat/bz k3z bean,)tery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates bebk n,/)3zza 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 3sdmc:,s+ nzsvolts. What is the maximum values3 dn+z:m,ssc of the current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operax9 0gpngyo s1,iru 5+s9 xt2ovz .qq-ste at 120 vons yo 99u .-1xigtz 5sqxrv,q2so+ g0plts?

  03.09: How much current flows through a 4 ohm resistor odx,1)j* r6qy sz 5urlthat is dissipating 36 watts of powu5 )s,zxyo1*6lj drqrer?

  05.21: A household iron used to press clothes is marked "120 q9j a gu.j3a;mcis; am lra,,jzu6a((volt, 600 watt.” In normal use, the current in;qu.g9luaj i((cjj,r aasmz6 aam , ;3 it is

  01.05: Which of the following resistancew 5t 0jebf: f,0j3)(ew6 ssswvn u-nnts could NOT be produced by a circuit containing only three identical 63 -stnfs00 vs5ne ej:,6ub(w wf)jntwΩ resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following ekd9jurf5on f q;m-((hquivalent resistances CANNOT be produced usinr m9 k fq((ud5on;-jfhg all three resistors?

  02.06: Three resistors of different valu2leknfa9/id ,;g rbojzee3rg: +5;ttes can be connected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistance can be prod:9zr ,3ge+eonkejbd 5;il/ga t rft2;uced?

  97.35: When a single resistor is connected to a battery, a to y2,)zu;anblwz uxr*7tal power P is dissipated in the circuit. How much total power is dissipated in a circuit if n id*zul ,w;urzn)2 abyx7entical resistors are 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 R2, amz1hhl w5; zn;re connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements z hm5wh;1lnz; about the resistances is correct?

  02.46: A hotplate is desif2qvi co) *gs lq.5- jl;b-vs+ ct:fsigned such that it has a resistance of 12Ω when operating at 120 volts. What is the minimum qjg5;+.c vfio2- is*f ts vll)b-sq:camount 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 resistorm(gq1kf ( g+; xds)jt:jde;sf that is dissipating 36 watts of powef1xj jf(tm) (;:q+gge sd;d skr?

  01.24: An electric heater draws 13 amperes of cuy b7b)ow (pp6+ jclgu,rrent when connected to 120 volts. If the 7 o6y+lwb( )jppu,bcg 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 litt)g-a3eml2 f1 gouhl j0b04/ga o4qwj continuously for 1m g)b 0hfot 3q4awjgu/2-el0g1jao 4l year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in a power o7*r hkl-vly;s f 24.0 W associated with the bulb. Which one of the following choices best reprl- h;syv* kr7lesents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer v6scn + z5jrmzrdf( 6)rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, what is the maximum number of the comput)+jd6ms5(r fzv6c nrzers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resistors to form a simple circuit 0r mhtc ;3:ev7e px-weas shown tr m07:we v; 3pxc-heeto 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 c,8tgume 0 bb40al.alsonnected to four resistors to form a simple circuit as shown to the risu ,tg 0ab4 8.mlb0leaght.
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 resistorsv/u2,h+o)cbxiumm9 p gja t07 are connected as shown. With the switch open as shown in the diagram the ammha,i jxg2utp0o ucv+mm)79/ beter 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 s;*yl :dv zc p/ 0+9z3uvvkaznjwitch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter */3v:vl+ 9 dvnz cypjza zk0;ureads 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 trj9/d/ei qst +ilnlo /ak7 /-7iwmgn: hree resistors are connected ar7dnje+i7w9 s/:gmnik//to -l lq ai/s 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?

  12.14: For the circu+4v mrfa.k vp1 1wdef6it shown to the right, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, 1 +1fvfe.vwd4ma pr6k and all three resistors have identical resistance R.

  09.07: The equivalent rg.,xz l9wq1l hesistance of the circuit shown to the right with resq1w l.z ghx9,listances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resl b-vr(ckvs4f5 mu5a0z t: :kuistors connected in a combination series and paralvsc:u: z 5lk4t-uv5a mb rf0(klel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors con4a bg8 uy pa2 2h*n2bp8.:xgqhbo lb5enected in a combination series and parallel circuit to a voltage source. b288hh aaxuq2po lgbpyn.gb4* 2b e5:
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, alluhd.ktc3p 9imzb)*2dj3 q u(wmi2 +vg of the bulbs are identical. Which bulb will be the brig9(pi bt2dz3v2 w g+ dkiu*q )j3uc.hmmhtest?

  02.21: An ideal battern5 (vj;fmaf4cy, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagrafmjfav c4n5;(m 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, an3 o 1myeovz7x; ideal ammeter, a switch and three resistors are connected as shown. Wiz 73 oxmo;yv1eth 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 ror y*k u, icoqgq/(ta-8a7 *dare connected as shown. With the switch open as shown in th,u*/(oaqtrqc igy* o -k7 dar8e diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?