16.09: In the circuit shown, an electricqy pj3q..9 xec current exists in 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 through the interior ox c p3jqe.y.9qf the resistor?

  98.06: When any four resistors are connected in p91))l kr) 1j1 z 5rxfsynbxyqaarallel, the_________each resisto qbar1fsnz)11j ) k5lyr x9xy)r is the same.

  06.33: A current through the thin fila.clt wve++/ kgment wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much coole++.tc gewvlk/r. This happens because

  13.08: Some standard houglbfa,, +rcqk/d*qsgu 5p6 tg m)b:s, sehold lights are being replaced with LEDs. LED is the acronym for which one of the following choices?,gu: fa* ,p+t gc6/bdrl kq,b5)sgsmq

  05.16: A cylindrical graphite resistor has length L and cross-sectional ars/fa2:rlyc :w8crhnq 8w2wzvm+ 29mvea 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 o/ar q +vyw:fw2mrw:cvl82c 9 mn sz8h2f 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 onnys0hzu 07 4p4wwt;II has twice the diameter and twice the lengz4htnp;n0y o w0 w4su7th of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the samt wpr dq7+0vsjvk w0-5o;(lvequh;x 9e material but has twice the diameter and half the length of wire X. If wire X has a uo 7khxv0lsq9wq d5pjwv(;rv+-;te0 resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has ljxij/oh za 35p3qbhqph-z ;:1ength L and radius r. This piece of material is then z/hpaqjbhip1 h oxqj;:3- z35 drawn so that it is a cylinder 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 bright6qv8: tqwddw-l+lnl0 er light bulb. He decides to modify the filament. How should the filament of a lightbulb be80 l 6 qnvldwq:lw+dt- modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors *enz 9ra3i g0dare made of the same material. The length and radius of each resistor isz*gredia0 9n 3:
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 mt8; *k3 axaj2qet.vp 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 2 apm.*vjxetk8a3q; tthree 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 circliwj d8fj-44 juit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. jj4fj84lwdi- The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The thr3,w 6 6kzf j16mzdpd8arum yy:ee bulbs 1, 2, and 3 - represen6w 6mm:yz31d68y zupfjkard, ted 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 r5 ,x j thdo7vd-k):pasight. If the current in all three resistors is equal, which of the followin dj)5o:as khp7x -d,tvg statements must be true?

  99.37: The diagram at right represents a sgx x. t89izk/f)hzcy )imple electric circuit composed of 5 identical light bulbs anfhz8kxyi9. zx c/gt))d 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements* 808 zaezimud is NOT true concerning the simple circuiazedu *imz8 08t shown where resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Buix,5h q ,m -u(ltzgk3ulb 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 battery, which one of the following5kxti 3hl,gq,u -u(m z choices best represents what is observed?

  06.34: How many coulombs will passr6 yqpkv64 **p nw7idw through the identified resistor in 5 seconds once the circuit w**vrqiwnky7p6d 4p6was closed?

  00.23: If all of the resistors in the oz ld.,6g*drx following simple circuit have the same resistance, which wo *d6xodzl r.g,uld dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the currog-mgpl(d 2k6ent through the 6.0 Ω resistor is 1.0 A. Whatggko m(6 p-2ld is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in seriesnocm9t(14u zd to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.0 W of power. What is thc19uodmn 4(zte voltage across R3?

  99.40: Three different resistors R1,u,oe4it5 l z,c5m1 zsf R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V 1 o m zts,ufe4z,5cil5across 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 v:z2d v9u(-r c4xxiu mwolts. What is the maximum value of the current undx4md-r z9w(uu2 vcix :er these conditions?

  99.23: What is the resistance of a 60 watggh40z/ m8ctb5w ,qaet lightbulb designed to operate at 120 vola8gc,e/ 0 t5gbzmq4 hwts?

  03.09: How much current flows through a 4 ohm resistor that is diss- (m)bknw5 ida-dfs 9aav0l,sipating 36 watts ofwamss 0-f-9id5,ab dk (n)vla power?

  05.21: A household iron used tbbpai /(y. tzhxu1 v 4u8og95oo press clothes is marked "120 volt, 600 watt.” In normaibubu98x1z/gp 5 h(o vtoy4.al use, the current in it is

  01.05: Which of the following resistan7n; avza(r2e eces could NOT be produced by a circuit containing only three identical 6Ω re(2 eae n;7ravzsistors?

  94.37: You are given three 1.0 Ω resisaeonz+/oy 9zro s yx po20.:u6tors. Which of the following equivalent resistances CANNOT bey/o:0poxen y+zz.a9 o6so ru2 produced using all three resistors?

  02.06: Three resistors of different values ca-z,g 4 jsubl;bzmcnz 8eg*6h;bap ) ugpp91w:n be connected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistance ca4 6ggum:zbzz8bh;pu1jlb,apws n )e9-pg ; c *n be produced?

  97.35: When a single resistor is connected to a battery, a total pwz:82j6 l zths)rq ae.ower P is dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistors are connected in series using the same batteryqte8z s.:w lrhj az26)? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, ha2+pfh 80 )xki)biph jzizi49yb/p9 gc ving resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the r/ic4 g0i)h9b9 h2p +pkp)zi8izy jbx fesistances is correct?

  02.46: A hotplate is designed such that it has a ;p sg: e vu6cl/: zims3szpi22resistance of 12Ω when operating at 120 volts. What is the muiv:sz6gp2 3sc s p2z /eilm:;inimum 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 through a 4 ohm resistor that e onbc1 if7*ek-oxl/jfd)q.c6 3p c y)is dissipating 36 watts of pow3ny b)pc1 c o7e6d-k x)*fqj.liec of/er?

  01.24: An electric heater draws)5(lloam.r 75rop 3 uqd pbw+h:bwd- e 13 amperes of current when connected to 120 volts. ow-uw5al3bdr r (pe7 :oq+lbd)h5m .pIf the 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 cox(jf6 0zqbq f jp0 lp ,dx91veuc8xjm*z *e3a7st to keep a 100W lightbulb lit continuously fo 9 xjjz a8e0l0qdpu vcx*6ep*3qjf x1zfb (7,mr 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A througrtdwsuhdj78,1 m/. rcl e 4cl,/r4gn nh a lightbulb results in a power of 24.0 W associated with dd m 71. l/8,sr4gr j,tcwncn/ul4 rehthe bulb. Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computhbhy;kxo1ubz k g; m;k1(1,n 3watv2ser rated at 500 watts in a 120 V circuit. If all comput xbvkam2h1u;1;3y 1wktzk(,b; gons h 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 connected to four resistors to form trhmtu o5peig+a 6g58 gil4,/a simple circuit as shown to the right.,mehtgggp/i+6r a4 l 58t5iou
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 re enjzw3q*e,dg,t); :g o,zkpesistors to form a simple circuit as shown to the right.*,:p o,nqtz eegk,z ew jgd)3;
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 reshsc9m bo x7c.xfkb9 iv /) rl463m6xnkistors are connected as shown. With the switch open as shown in the diagram the ammeter readsxh).m/lb963crf9 kixvokm 7scnx b 46 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 thregs+vm-z8 k il+e resistors are connected as shown. With the switch open as shown in the diagram the ammeter rea+-m lzk8+gsvids 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ammetez/b; wjqe 0-qkr, a switch and three resistors are connected as shown. With the swit bw0 ezqq-;k/jch 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 equivalep3r0crspt- +lf62a r pnt resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resista60rp ls+p3r c2prt- fance R.

  09.07: The equivalent resistance of ().eb:3;upvryh t7na q:g rfhthe circuit shown to the right with resb;)3(fh y:vah:pq7.g r ner tuistances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows fiv*zx u:yii(q9f e identical resistors connected in a combination series and paralle i9y f(*xuzi:ql circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistornl(o8(xx6o n fs connected in a combination series and parallel circuit to a volx68ono( lnfx(tage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are nfw*xi 82jd8q identical. Which bulb will be the 82*i8n qxdfjwbrightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors are con vn0teegpsk -1-l+9i tnected as sh pi--teek+ sl19vgtn0own. 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 switch aremf;hu 7ufni,+j3m,- x 8hugnd three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperufu,+f-n e gu i8m hr;3h7,jxmes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal batterg2lg:vk *6,hjb9gwkl y, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shownv* jl 2:lb9h6k,ggk wg in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?