16.09: In the circuit shown, an electric currents9put-g fa: 1( agwqp5t .pq6pbn6/af exists in the metal resistor connected to the battery. Which one qwfp66-5 (tqa abu.ppt p s1 agg9/:fnof 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 resistor?

  98.06: When any four resistorb:yy n9;2rfmq4vsm d-s are connected in parallel, the_________each resistor is the samery94myd:vf2 nm q ;-bs.

  06.33: A current through the thin filament wire ofob5h3bn rfrh(h80-q98e pju b a lightbulb causes the filamebhp3qfhe 5rn8j09 rb( u- 8bohnt to 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 i nppm.k*: am8rs the acronym for which one of the followinmm * ar8k:p.png choices?

  05.16: A cylindrical graphite resistor has length L an:p/eg8 sd y*2 gomgv7rd 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 ndo2 s:7pv gr/ mgeyg8*ew resistivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same material. Wire s20wuvdout, 5.3q wijII has twice the diameter and twice the length of I3u,s otj0i5d2vu wqw.. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the di-ap- 3y m+u:-ho5zeaiho1 okqameter and half the lengtp o51k-izeuy-+m 3 -ha:oaqohh of wire X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length Lq+psk wl hu; u0byh,h 3y.-t*o and radius r. This piece of material is then drawn so that it is a cylinder with new lengksp0;ho u3t. bl u-yhyq+w* h,th 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wan3dqp( ajh2z g8;nz2 t:bt 3y,i-ah cbrts to make a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at a given volta 2( :pq2brb tjhtya-za3 zh8,3g ;cnidge?

  16.07: Three cylindrical reqm4x 0wl8f xbw h-c;grg(7) qjsistors are made of the same material. The length and radius o)4q- x ghw8mb 0wx(j;lgc 7rqff 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 rl wn1yx-.l.g.wp0 8t qwni*awesistance R, are connected to a battery in the following 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 ofn-ww.wg at .wqxnpy. *li18l 0 this arrangement of four resistors?

  95.35: The voltmeter in the accompanying ct1dse 9fhyo6*ircuit diagram has internal resistance 10.0 kW and the ammeter h d6eosty9f1*has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown(d y kb3.-m s8erm(iqn to the right. The three bulbs 1, 2, and 3 - represented ei-(r (s3 8bdqmkm n.yas 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 electric*hg5sut- ai7mw z*ym -: lsb;wal circuit at the right. If the current in all three resistors is equal, which of the following stigwml7;:- sta h-yu 5b*msw*zatements must be true?

  99.37: The diagram at right represents a simplel j hv5o9yvn 6s0f(7qo electric circuit composed of 5 identical light bulbs and 2 flashlight cevy(9of7 0sljho 5v6nq lls. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the simple circutqk r2t d k0f;5s(kl8vit shown where resistors Rt0k8 q5kf l(kd2sv;r t1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected 3 t)j*w;-vytzkptrz6 in series to a battery. Bulb X is brighter than bulb Y. Assume all circuit elements are tr6zvjw3*p tt;y -kz)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 throug(8 9of dcjyf2uube20d h the identified resistor in 5 secondsodu8b2 u2c90jyf (d fe once the circuit was closed?

  00.23: If all of the resb7 ele0- yrw9zistors in the following simple circuit have the same resista9ewrz l -7yeb0nce, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6.0 Ω rgjb.x1wik ;;k esistor is 1.0 A. What is the power supply voltage Vjg1wkxik; b. ;?

  97.27: Three resistors R1, R2, and R3 are connected in series ,k)y5p59s:xdomc q+ibwa*a kb/og.t to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ωm q o 5/p)yowb k9x5g+akbi*ds.t ,a:c, and R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are co/ys51zz5p y rsnnected in parallel to a battery. Suppose R1 has 2V across/ssryp 5zy1z 5 it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 wattsigu 91x hkm0z/g0w9dm and 120 volts. What is the maximum value of the current under th10gmd 9/zimhx9 gu0kwese conditions?

  99.23: What is the resistance of a 60 watt lightbz3f3z izv-ok( x azp,0ulb designed to operate at 120 volts3v zip-30fzoz(,zax k ?

  03.09: How much current flows through a 4a.c7 .ahq8h mp ohm resistor that is dissipating 36 watts of p.7qchma. 8ha power?

  05.21: A household iron used to press clothes is marked /ghtyzz/85rf*+rrvd "120 volt, 600 watt.” In normal u h5zty vfdrrg*8r/ /z+se, the current in it is

  01.05: Which of the following resistances coul )vckrds2mz,qq/b(3.su3 q g dd NOT be produced by a circuit containingg. 32 )kv zds(sqmud,/qc brq3 only three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resist +wspj)yk)z kj o2i* 4xzg7) z,qoor6jors. Which of the following equivalent resistances CANNOT be produced using all three resir+ ow pz2 jzx6jjo,zy)i4q)*k 7 gosk)stors?

  02.06: Three resistors of differentaryfk9*8;t okrhs( m 6 values can be connected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistancerf hr6k*9yts;8 koam( can be produced?

  97.35: When a single resistor is connected to a battery, a total poop) 0z zra-m(bwer P is dissipated in the circuit. How much total power is dissipated in a circuit 0rmbpz( z-o a)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, havl*0qk6w)ug x:u peub0ing resistance R1 and R2, are connected in parallel, the equivalentgw)plxb* :q ueu 06ku0 resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed su28b6 04hpio +opfi yx6wc4wv kch 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 water p4h x8wkoiof06viwcyp b46+ 2from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much currx61ddj6a4wqg uv 2z, tfd+4e,o- wvusy-q p m8ent flows through a 4 ohm resistor that is dissipating 36 watso,a48xzv jgmd q y66-2,4pueu+1q-fwwt ddv ts of power?

  01.24: An electric heater draws 13 amperes of curren(ge9 ;a6 t:tmboauum2t when connected to 120 volts. If the price of e uaegma u;6(92:to tmblectricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much wo novzqfu2.k1d6;3k t if 1qpd:uld it cost to keep a 100W lightbulb lit continuously for 1 z 1 kp1.d3u2;tffko:ndvqq i 6year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb res2hzgniz c62-g, njaj;ults in a power of 24.0 W associated with the bulb. Which one of the following choices best represents the resistance c j ij22n6-hgznag,z;of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 500 watts in as/h bz c,b24vi 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, what is the maximum number ofbzv/c, 2hsb4i the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected hn0 cozq5ah.;lrya3 fb)*wo3to four resistors to form a simple circuit as shown to3)hz.0qywr*o5b;3 coahfl n a 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 connected to four resistors to form a simple cirnpx-)i, cd tve3hm1 v6cuit as evt)3mxv i1 -pdch 6n,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 res;g/hx.q1dq0pf kd/ dz istors are connected as shown. With the switch open as shown in the diagram the amg d1fpq0.kh/z/dx d;qmeter 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 ammy1lltq lsb+ ;e9 xw0i3eter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammetexe3lq 1;t 9by +lislw0r 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 resistorsufl4 popvu5f awh;h6 ik 3h- 6:drif94 are connected as showipwil 6f46uh h 4v3du9rp5 o;fhk-f:an. 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, whfohstf kmcwv8z3i ;r /t l07+5at is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all t rf5tm czovh;w0 3ti7fk/ 8+slhree resistors have identical resistance R.

  09.07: The equivalent resistance of the circuv8ieb i4;sep:5m : 8aeumvpw2x wki1 8it shown to the right with resistancesm4ib8xv28:e1e8pwk pe wsi5u mia ;v: $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a co yiwj4v4/ko jv )rqr8g,3 ja+zmbination series and parallel circuit tj 3 r i+q/za4kvwy jogv84r)j,o a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors conn cqnu*.saoa 02ected in a combination series u0ca*n. 2sqa oand parallel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagra h(i arr2o-g/pm, all of the bulbs are identical. Which bulb will be the brir /( a2gohi-prghtest?

  02.21: An ideal battery, anvu38lbf4 :o eav2ecn3 ideal ammeter, a switch and three resistors are connected as shown. With vof3:l en8e4 uac v23bthe 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 switch and z0nuepzb 5y6). )9q ucf hl gcg.8nxv8three resistors are connected as shown. With the switch open as shown in the diagram thehup8 ex.8 v 6nyn5uq9)0z.cg glz)fcb 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 co+ftc5 8ryvm4+1lkrkn t+ ft9 jnnected as shown. With the switch open as shown in the++tjr ftfkyr +lmnk9 8t4cv51 diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?