16.09: In the circuit shown, an electric vh)t1yzm. f2:vzip t9 current exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of elmztfv2 zy9.p)1h tv:i ectron flow through the resistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are coo1: x3*ek pfbinnected in parallel, the_________each resistor is the sapx e:bifo1*k 3me.

  06.33: A current through thexsj bdfb1v y r9.5;sa4 thin filament wire of a lightbulb causes the filament tovfb sx1b dy4.5jr 9s;a become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. LED ig+k3avd fr; k0s the acronym for which one of ta k;rv d+kg30fhe following choices?

  05.16: A cylindrical graphite r y6ylcxt2h dy(jfjw/ ;m8 ze)7esistor has length L and cross-sectional area A. It is to be placed into a circuit, but it first ztmfy 6yh)yle2w c8(jjx;/7d 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 wia.oi-. (ho:2z7y vf;hqozx pire II are made of the same material. Wire II has twice the diameter and twice the length of I. If I has resistance R, II has resispyi( oofxzh; zo.q:.a 7hv-2itance

  99.31: Wire Y is made of the same material but has twr. gwfvj,a :v4 3oqjpwc5n 76kice the diameter and half the length.76fw5ak4:vwj ,rn v3gc q pjo of wire X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resis be vu35vbe,hmv,1u0 ftor has length L and radius r. This piece of material is then drawn so that it is a cylindev bb v u,5v,e1u0fh3mer 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 a brighter light lfuksugt e9u:a 1or,j84,d 0u bulb. He decides to mod 1s,tg jaeu:0f9ld8uuo u,4krify the filament. How should the filament 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 sameupnhf5o ,gc* 6 material. The length and radius of each resgp6noh *f,u5c istor 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 ofw 0sw:+u8xvap7 . itb9clt,8 ya dqgs5 resistance R, are connected to a battery in the following way: “Two resistors are connected in series. This combination of two resistors is connected pdt+.wg9: ,yv t0w8iax8css5 7uql ba 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 internal resistann6 dsij q-br(-ce 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter readi(q-6bs d- rjinng is most nearly:

  97.37: Consider the compound circuit shown to the right. Thj3h* .9ihhs oey zbka(6t*auwt()k7 j e three bulbs 1, 2, and 3 - reat)h(w ya**jk7(3 oejzit96 hs .bhukpresented 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 current in a g hn b*v*c 2fj+ve:jw:l4jyz0ll three resistors is ve+*v2jc:wzgnb * l4 0 fy:jhjequal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric circui9xjqf ogf4xsy1: 7n:pkmm 6o;t composed of 5 identical light bulbs anf sq: m9o 1xf;o6yjgk4m7xn:pd 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements :pvsmt5ql73w is NOT true concerning the simple circuit shown where resist7: p5v3wlsmt qors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X izc2 v )c6v ef;g,q6lwvs brighter than bulb Y. Assuz eq;),6 vcf6glv2 vwcme 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 represents what is observed?

  06.34: How many coulombs fobiw;(7v4onih xx( , will pass through the identified resistor in 5 seconds once the circuit was closed4(nh(7i;x,of ixwv o b?

  00.23: If all of the resistors in the following simple ;veo2-upy m mus,sm-yxq3p*1circuit have the same resistance, which would dissipate the ;esuyu2m*m s omq3p,1-py- xv greatest power?

  98.34: In the accompanying circuf/ y,hx7sd8s yit diagram, the current through the 6.0 Ω resistor is 1.0 A. What is the p,/ syx7sh8f ydower supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in ser:ie(ws vfxp5 ,ies to a battery. Suppose R1 carr,p (:5wesvf ixies a current of 2.0 A, R2 has a resistance of 3.0Ω, 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 vk5h dye7 3vw6to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in v7e d6why3kv5 R3?

  99.13: A heating coil is rated 1200 wattwwnu 5: l6yj(zs and 120 volts. What is the maximum valzy(6w:ulnj 5wue of the current under these conditions?

  99.23: What is the resistance of a 60 watt lightbuedqf l oian79.avbej6/j1m6*lb designed to operate at 120 voljlja67qo a*bvm1d6 9.nfiee /ts?

  03.09: How much current flows through a 4 ohm res3ulg aq. pxky 92134nrwu z0esistor that is dissipating 36 watts of powerxr40kusqa1 lg3 p9e2w3n y.u z?

  05.21: A household iron used to press clothdgb5f79;mi lmes is marked "120 volt, 600 watt.” In normal use, the current in it lmb;d5 g7fi9mis

  01.05: Which of the following resistanc73l)xzz is 0z .elmgk2es could NOT be produced by a circuit containimlekz 3)il27z gz0.xs ng only three identical 6Ω resistors?

  94.37: You are given t7,qz qn4o.ok p zeti:.+ ghr7 bmcm6n6hree 1.0 Ω resistors. Which of the following equivalent h qb:n6,+q7 mkeg4 iz7z6rn.cm.op otresistances CANNOT be produced using all three resistors?

  02.06: Three resistors of mbxf;u9 :x 7hz bcy6k;different values can be connected together in different configurations. If all three resistors are used in a circuit, how many different valuzxxfb:k;mc7u bh 69 ;yes of total resistance can be produced?

  97.35: When a single resistor is connecteqy9glh/r6b ;kyc1t ;qd to a battery, a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identikqyy9l6 1qh;tc/ ;rgb cal 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, are connected in pa vlw p *bf/wr*o6utz:1j.hle7rallel, the equivalent resistance of the combiwrz .l6* hlb:vtuf/1o7w* ep jnation is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω wheepzbx )* flfvac dzw3+p ;s18,n operating at 120 volts. ) c+p asz;, zff*xvw3e1 bpld8What 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 thrcp*-zxo)z 2uug whe 8*ough a 4 ohm resistor that is dissipating 36 wau)zhgow *2ex*8 p- uzctts of power?

  01.24: An electric heater draws 13 amperes o21vtwcvu9p dc6u2roj bn7 -3 xf current when connected to 120 volts. If the price v2puu63v2b7wj d1o 9- xncrtcof electricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much wouldvkhz6w ioo+ b4 sek7gdld58 6. it cost to keep a 100W lightbulb lit continuouslk.4 vkdl +wo7 oi68gshz5bd e6y for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A th-n bp2c7xvbm5 0a:lrs, sk fd0rough a lightbulb results in a power of 24.0 W associated with the bulb. Which ones5-0sx70m kr:vc apf,d b2l bn of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six ownsf cdh q s64(::veim7rf a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 a :qsrv:d6e4(hffmi7c mpere 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 resistors to form ajwpnv zayy b;i ,)1m17 simple circuit as shown to t7wiy;yn 1,)zm bvapj1he 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 connected to four resistors to form a /xu6n/dscm n7simple circuit as shown to thd c/6xnnm/su7 e 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 thremoh26jxmny1j,q-vy 5 e resistors are connected as sho-o,yjh1 mv j52q6 nymxwn. 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, a sw rr 5)ldg,o ns az4-wmtrpx87e-zg,8o itch and three resistors are connected as shown. With the switch open as show4wsne pd-r r7g,r8-lz)8mao o,g5tzx n 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 f7e3i /+qnaxhg4*c r vconnected as shown. With the switch open as shown in the aqi 7ev fh/ 4n3rxcg*+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 sho3mdx; nvo)ej /wn to the right, what is the equivalent resistance? Assume that all/x ;nmvod3ej ) wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent req7hkwqxc-6k0 .ixn1y sistance of the circuit shown to the right with resistancesciw601kky -hqx7 n.xq $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five id5mnpw.(lty6 4wzksemv (.6k hentical resistors connected in a combination series and parallel circuit t6wny(lzw p6( sk.5.km4t vhemo a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connect.: a7eyzr3nl yed in a combination series and parallel circuit to a voltage 7 er:.l nyyaz3source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diag0h 0l 5ykr3:1b*zdpl ed8hva lram, all of the bulbs are identical. Which bulb will be the brigd* zad01hlpbye83l0v h5lrk:htest?

  02.21: An ideal battery, an ideal ammeter, a switch and three re 3cbm/k9n2xwknz1+ d/at n9qfsistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 ampere9n mkc12bkwqt/nz a+9/ fn d3xs.
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 rer(r1ur6* kr qesistors are connected as shown. With the switch open as shown in the diagram the ammeter *( rr1eku 6qrrreads 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 uumkp*z(0 m*iswitch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads z*i*(kmupu0m 2.0 amperes.
When the switch is closed, what would be the current in the circuit?