16.09: In the circuit shown, an electric current exists in the metal resistor c(e1qvd wz:tbc15( ig ronnected 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 ofwt dg( 1c iq(z:b15evr the resistor?

  98.06: When any four resistors are coprxe wg.vdji12q : bw*v d531znnected in parallel, the_________each resistor is t:vv wpzd2d31q5 bjgrw.*i1e xhe same.

  06.33: A current through the thin filament wire of a lightbulb ca,/co4lqag c o0r3b iy 6-tspy/uses the filament to become whc /c0o sbyoa,ql/i 4-gt3r6ypite hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are beir+ lpv+vqt*nxp5 bi7*ng replaced with LEDs. LED is the acronym for which one of t +bn vqxil*t+v*pp57rhe following choices?

  05.16: A cylindrical graphite rxjyno:n5xasa5amlt u*3 3l:+ esistor has length L and cross-sectional area A. It is to be placed ix ta:aa +sun n3:5lo3 *jx5mlynto 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 resistor?

  98.20: Wire I and wire II are made of the same material. Wire II has r1f:qjd7l85xk5jq km twice the diameter and twice the length of I. If I has resistmq5jjf85q:lk drx 17kance R, II has resistance

  99.31: Wire Y is made of the same mlsyg z,z:x(89 f nnu2paterial but has twice the diameter and half the length of wire X. If wire X has a re(zypx s9: gn 8n2flzu,sistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This piece of mawf r32n9i1n kazqz0h*terial is then drawn so that it is a cylinder with new length 2L. What happ n1*rnf3wqiz 9a2khz0ens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He decides tows/c5on*x2,l 8uy(puq 0xo vg modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce morwgo 58,v0 (qxsuynul2o *x/c pe light at a given voltage?

  16.07: Three cylindr p ji4d)uhu)p;ical resistors are made of the same material. The length and radius of each resistojiuh)p4 d;pu) r 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 toc,u1ngpy/b g 7.wt 5che foln cw/ b7gu5pty .1gc,olowing 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 the accompanying circuit diagram has inte05b(nt p3- pr-xqb6 gblyunt 8rnal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The vol6g t8lbn( by- n-pb5q3rtx0putmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The thq5vgtnc /tq, -e0m8c2rw7 va oree bulbs 1, 2, and 3 - representedt8a c-n0veq, q trgow7vmc25/ 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 thet hja9j 751i pbqc)4idb-wi;o right. If the current in all three resi7p oc taq1-iw9;bidj4)5 ijhb stors is equal, which of the following statements must be true?

  99.37: The diagram at right represents a sims/fo;i 3izl+ec z1f*ople electric circuit composed of 5 identical ligo/c ol1i zf+z;e *isf3ht bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the simple circ b-d(avtohvlcu 7,+ 0cuit shown where resistors R1, ,vh-7vu d ctb(aco0+lR2 and R3 are have equal resistances?

  17.29: Two lightbulbs X /-nlrx 3oq )oxandY 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)/xn3 -o xrolq battery, which one of the following choices best represents what is observed?

  06.34: How many coulombs will pass thrpss2 f8q y7,zoough the identified resistor in 5 seconds oyspqz 78 2os,fnce the circuit was closed?

  00.23: If all of the resistors in the f g5d ee4adu 6oi40u9beollowing simple circuit have the sa i64udad4ee9uogb5e0 me resistance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current throun0bu9sekv f *9gh the 6.0 Ω resistor is 1.0 A. What is the power supply voltage V? sv*k9f n0u9be

  97.27: Three resistors R1, R2, and Rayxl +gm(.k b;3 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 mgk yl;b+x(a. 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected ief07c+j 8t4qls5 syz an parallel to a battery. S+7 je af5t0ss8qyczl4uppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What is wk(,.g2 tr;ff4pw omzthe maximum value of thptgkz ;rfw wm2fo, 4.(e current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate at 120 z9nbt dd.;h :jvoltsddb z.ntjh; :9?

  03.09: How much current flows through a 4 ohm resistor that is dissipating 36 wa1 3en9n +gf6 vpn egevzk.s0k/tts of powes kvekg g0e.+n n3n 6pv1e/zf9r?

  05.21: A household iron used to press clothes is marke k6h57osg 4apsd "120 volt, 600 watt.” In normal use, the current in it i sk6sa5p7goh4 s

  01.05: Which of the following resistances could NOT be pmaaintg f*n .: 4t-,uo2twr (aroduced by a circuit containing only three identical 6Ω( ngtn *-,mt4u :.awtfar2ao i resistors?

  94.37: You are given three 1.0 Ω res8ut o9a1n9 2sxeym 0mfunppg1q3l5i0 istors. Which of the following equivalent resistances CANNOT be produced ust0qy8p3 52o finu e x99n 1mupmasg0l1ing all three resistors?

  02.06: Three resistors of diffeipsuwh5r)2*pxk ; x8 urent values can be connected together in different configurations. If all three resistors are used in a circuit, how many different valu*k xupprsx;u 2i 8hw)5es of total resistance can be produced?

  97.35: When a single resistor is connected to a battery, a total power fwp (b(y 1s+yjP is dissipated in the circuit. How much total sy+ 1fy(b(pwj power is dissipated in a circuit if n identical 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 i jgs,kwqvw)q )y::cx bta9+;, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the foiw:yj:sk c; )) +qv9 ,wtbagqxllowing statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a rcht7l6 i6 p6im )t 18txdb,ofzesistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to warm 0.45 kg of water f1ixbtthiod,mlp6fztc 6 6) 78 rom $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor that is dis nn0k7w/6/szz( gwy udgob wic5/*oa(sipating 36 wa/ua/ ngzcwkn0yw6bz g7(/wio5(*sdo tts of power?

  01.24: An electric heater draws 13 amperes of c6 n ofdk6(a0ypurrent when connected to 120 volts. If the price of electricity is ypf( k60nda6o $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 lightn9)lr1si pvc4bulb lit continuouslyp9slrnv4 ) ci1 for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A throrzz;o cb(( y6iugh a lightbulb results in a power of 24.0 W associated with the bulb. Wb; r6((ciz ozyhich 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 watts in ij,ufo 8l3lxef/l+59tjh e-y 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 computers can be operating at the sameto8jl5 ,x3jl fiut9elfh + -/eyime?

  03.16: A 9-volt battery is connectedn1euth)q um(5 to four resistors to form a simple circuit as shown to the uq n) t(heu51mright.
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 rgy+gsxm*by1(:x p(u qesistors to form a simple circuit as shown to the riuxs(*(gb: y mg1y+pxqght.
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 resis2e0 inu8v;fxesy 7e2oiy/5 xp tors are connected as shown. With theye8xipf ;2 2 nx 7e/yos0ev5iu 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, a3;bb hs)4u z2mwd6tie;mi )j w switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads43h )iw6s2w j;mt)eu;bdmbiz 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ammeg.mpybz1amy+2.5kmft es5jzje.2 s 0ter, a switch and three resistors are connected as shop.m0 jz5emf.st 1+m25 bjy2se.ag zyk wn. 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 circuit shown to the right, what is the er)2h *fc/uaio1. ujfmquivalent resistance? Assume that all wires are ideal, the battery has no internal rom/2u)aru1i.f *c fjhesistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuiwk6iyhbq,y* xrsx.m apy).6w3 b: : j6da0ailt shown to the right with resiy: mar0xis j,lqdk.6iyx babwa:)yw3 p*6h 6.stances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below show 7arpd33-lhtq s five identical resistors connected in a combination series and parallel circuit to a voltalpr3-q7ht d3 age source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors contjuv;g- 2tp8ghr(bpk-z5jb* nected in a combination series and parallel c ( rb-j*ugthpzpk52v-bg ; jt8ircuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram1xtl(3 xa*smjk 7;nbib )xw*05pgjyb, all of the bulbs are identical. Which bulb will be they;g p1xx tw*b5s 0j)ixnm37k alj*(bb brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resisth2d3rkj/z+el wfme8c( h- /qn/z b4ivors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 ampbzi4w /knmvqz- dr82( h/e/3+helcjferes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, an idear*5 oeuszyy s -c,tt,wg*y2:dl ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 awysz o,*ycud5t r*-2y: ,tesg mperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ammeter, a) ftpf2ti,esw, zq;h1 switch and three resistors are connected as shown. With the switch open as shf; ,pe,ztqwf 2t hs1)iown in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?