16.09: In the circuit shown, an electric current exists iygqx*cnhp(:wkn/9 +e n 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 th(+wn*g cn/ :pxqy9k herough the interior of the resistor?

  98.06: When any four resistors are co)q0k:y l;0db a5 l3eza (dcysmnnected in parallel, the_________each resisto) ;d5a(dkayc3: sbl0yelq0z mr is the same.

  06.33: A current through the thin filament wire of penq:o .1p .uea lightbulb causes the filament to become white hot, while ne eo.pqu.:1pthe larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard ho: ak )(haknt xe51iq7iusehold lights are being replaced with LEDs. LED is the acronym for which one of the following :1 i hk7n()eqixaa tk5choices?

  05.16: A cylindrical graphite resistor has l0e 5nd8teay7x0hzc p -ength L and cross-sectional area A. It is to be placed into a circuit, but xz tph0-a7yndc5e0e8 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 thjhh:4ok0em9: c 3uz5sodo 7 hde same material. Wire II has twice the diameter and twice the length of I. If I has resistance R, II ha3o cm7o0ksd hoezh d5j94hu::s resistance

  99.31: Wire Y is made of the same material but has twice g)/ccrb9o ,qmthe diameter and half the l c)9m/b, goqrcength 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 L and radius r. This piece of matt 62y 8s. y gj)pn7xqf5vb.kxxerial is then drawn so that it is a cylinder with new length 2L. What happensn t sbyy8 7pxxjv q256fk..xg) to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make216)vomyr h wb 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 voltage? 2omvwyr 1 h6)b

  16.07: Three cylindrical resistors are made of the same material. The len4lkojj24a/ vjs mkb).gth and radius ofvb j/.4kol amkj 4sj2) 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 R, are connected to a batv-qslo3ip 4l8tery in the following way: “Two resistors are connected in series. This combination of two resistors is connected in parallel to a third resistor. This selis8lo vq-3 p4t 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 tl6dik. zau9 n1he accompanying circuit diagram has internal resistance 10.0 kW and the ammeter hd .k1iul an69zas 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 to the rightr9e;yb 1dfb1x 7h a9 mtrs*ckuj me,32. The three bulbs 1, 2, and 3,f9 cemysx;7*mar3b1rtk hj9d2u1 eb - 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 electrica1g4s) l9 fj* qvmcaywx2y: 6e3o4stjul circuit at the right. If the current in all t4vl j3q scsxya6f9yj*e owg4t1u2:) mhree resistors is equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit composed of 5gtojg 0:2+s2 sk 5edcs identical light bulbs and 2 flashlight cells. Which bulb (or25sk+: oc0tsdsg 2jeg bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerni f8be3+0ukq okng the simple circuit shown where resistors R1, R2 ankf ue80b+ koq3d R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb p2cm2 *hmx.qf .czcc) g5okyz.hz8z 2X is brighter than bulb Y. Assume all circuit elements are ideal. m)hzc 22f* zm2o yhx.z8pcc. 5zqgck.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 jr8*pk3b 8bmo7nmt2bjc3 3 gq will pass through the identified resistor in 5 seconds once the mq tjc8kbbp7* 383rjg2m3bon circuit was closed?

  00.23: If all of the resistors ivuo pn1t ur9o)ss24t. 5 cx1pin the following simple circuit have the same rev9su .or1u sip4 cp1xt o25t)nsistance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagra:mx m bbftpy(7(q dc8/m, the current through the 6.0 Ω resistor is 1.0 A. What is the pcdx t/8q(fmm:p 7bb( yower supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battwp0gquaz.e3i, q w6r0n3s0 a eery. Suppose R1 carries a current of 2.0 A, R2 has a resistasz06 iaew3wpau3e0,.rgnq0 qnce 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 conne,*cpq j prdif4 b801fg9 q-xzhcted in parallel to a battery. Suppose R1 has 2V *p4d fbx hq09 c- 81gpj,izfrqacross it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts andtgv7 )ufex xk3)( sz4x 120 volts. What is the maximum value of the current under these condi ( fv ugzk)stxe43)x7xtions?

  99.23: What is the resistance of a m4anvj z-, buyv01sc9 60 watt lightbulb designed to operate at 120 volts-,s bcn4901uvmv jzya?

  03.09: How much current flows throw34),e p iob,)hl-njoabr lnla*ap. :ugh a 4 ohm resistor that is dissipating 36 watts of power?h, labb or)a:appo3.* eliln,j4-n) w

  05.21: A household iron used to press clothes is marked "120 volt, 600 wa )j)k /ojo.3isgpa,amtt.” In jmj os3a ).gko,ip)/ anormal use, the current in it is

  01.05: Which of the following resistancespb/j-ng 4zaaizf14d 6 could NOT be produced by a circuit containinpzai 6/f4 nd-gb1za4jg only three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which xm/0:;x )fa zen:tdm rof the following equivalent resistances CANNOT be pro m n:d;rmx:ef tz)/a0xduced using all three resistors?

  02.06: Three resistors of different values catr l0:3xighq6o5l k,jn )pad *n be connected together in different configurations. If all th)l:*nq0aj 6i,dtgolhx k rp53ree resistors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is connected to a batteouxo81f3 hx.y ry, a total power P is dissipated in the ciro81hyx x ou3.fcuit. How much total 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 rese1ni -b ) daujcu/f.)bnt14 cristance R1 and R2, are connected in parallel, tu )bb-n1ict 1d/ )4f.eucrajnhe equivalent resistance of the combination 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 when operhu(q 0f/uz;c1hu z1oqt41lnp ating at 120 volts. What is the minimum amount of time that it would take to wh(zzc0u/ un pl41qh f 1uq1;toarm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor that is dissipating g1s n.vj +;j1)63 l wwzffm qu/ysa7zs36 watt)a vjzsuw7yq l+3fw/1 ;g.f msz1nsj 6s of power?

  01.24: An electric heater draw n e9rsl/xn)iaz).3gxs 13 amperes of current when connected to 120 volts. If the price of ezxx i)3lan/ e)r sg9n.lectricity 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 6l db8drutig. 14ndsp0mu 3 t8to keep a 100W lightbulb lit continuously for 1 year at a rate p0 tl8 n4dgd6bs1u t8rumd.i3of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbkealh v1-g6 5vpe0 j1zulb results in a power of 24.0 W associated with the bulb. Which one of the following choicesj10 5legv1zvk6-ah p e best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 500 watts in a 12kom 7 ;m*ixbmv-:6xns 0 V circuit. If all computmmi- 7b6:omx;v skxn* ers 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 sametime?

  03.16: A 9-volt battery is connetly 9 ky(rg;a;cted to four resistors to form a simple circuit as s ;g(a9y tkyrl;hown to 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 /)kou2 l p/wvepf f98m889lya.g pfnrto four resistors to form a simple circuit as shown to tmfp o9wg.8 nuypl/ fevk8r8fap )l /92he 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 thrjyuci -n12f/0 obxbo+ee resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.-obb2 f+uoj10c/i yxn0 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 2n-iycwgl2p.2eo e lk sn703bwitch and three resistors are connected as shown. With the switch open as shown in the diagram the ammei0 ly3n2.kgcwn2p2l bo-ee7s ter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery,9nam;y)- d 3r ao1zf6a-utoi(jw eq np/nu y6, an ideal ammeter, a switch and three resistors are connected as shown. With thmnnr-w1fu-t yyiopd z6 9a3eu,)(/qo;6jna ae 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 equivale7un1 ww+jw nik yv*;t9nt resistance? Assume that all wires are ideal, the battery has no inteijwn wkty71n*9+ ;u vwrnal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right with rej 2 */t -ojb6s mwmcxu5ultn 24cs/:l0yul.r ksistan s5n.otrw:l- ku4m 0 6t2mcx/ yb/uuslcj *2jlces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors con hub*s :7nh jivqx0 ( xi*od74r4ew6wtnected in a combination series and parallel circuit to a viqnxuvt hxs4e*o 7i:jbw d0 (hw 4r7*6oltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connected in a combimks.cg47,7 m r +ec yij2qel1onation series and parallel circuit to a vol r4kqg+7.eio271m, ey scclmj tage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all oxp:e7lu ux 7h7f the bulbs are identical. Which bulb will l:7euxpu7h 7 xbe the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and tzsb*bf:z33bii 9j hx 2hree resistors are connected as shown. With the switch open as si b *923z hjzifx3:bbshown 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 id-6gq - vlxamp3i fs5(.s lez8eeal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the a sfli5-eqgse6 pazl3v.m- (8xmmeter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an idxjg1*j6tlp+73lt6uo4qx n cif xg 9 f0eal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes.+ jjcog0 1fxt3tq6l967xug ifnxlp* 4
When the switch is closed, what would be the current in the circuit?