16.09: In the circuit shown, an electriy z(shbq2stv 2n02w0y c current exists in the metal resistor connected to the battery. Which one of the following choices best describes the directionzys0(0q 2 s2ty2wvbhn of electron flow through the resistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are conn.n/e tje yzj a8i2ma:1ected in parallel, the_________each resistor is the samejt8z12.a:njmei y a/e.

  06.33: A current through the thin filament wire of a lightbulb causes the +9 ngo) -6 ytsh- se:tapxnx4hfilament to become white hot, while the larger wires connected to the light: a-tt6 xxpy) 4 n9+ssn-ghohebulb remain much cooler. This happens because

  13.08: Some standard householdco6 se h8x a.57g4k-ojz3-yj)c ljdgv7y u1rt lights are being replaced with LEDs. LED is the acronym for which on4d- uzog g7-l j 1y6vx3a5)jy.tr 7kh c8oejcse of the following choices?

  05.16: A cylindrical graphite resistor has length L 8uvq2 .6y;ttrr5zyvj and cross-sectional area A. It is to be placed into a circuit, but it first must be cut in half sj .z2rr;y t68vyv qtu5o 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 mad3g 2wh) ny+m dw0-qkrs0c4wswe of the same material. Wire II has twice the diameter and twice ths dwgsywq-+kn2cm0 4 rw w30h)e length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diameter pw21 u-wtmawy,9w f78 0 cbpngand half the length of wire X. If wire X hawywb07 p2tna f 91 ,w-cgup8mws a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and rbp) hmmacdg6j; g2 9st.,a7v tadius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this material be,p26ghmcj t ;7sg)vda .9mbtacause of this process?

  07.27: A junior Thomas Edison wantze7 p)f0yaz95x 3j3 ymdbh4vts 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 light dm4y p 33zv75hxj)a09y tbfezbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are mad/3a44lgx zynn wt 9u6r 9hy6sre of the same material. The length and radius of u6rt a43yw9s6h4z/xnr lgn y9each 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 oxd6, l bcbepy1b42oubt 228ld4d0ls 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 tot68od s l0ol2 dubx,el2by244 cpbd1 b 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 f d,zlui)kzh7x 8dz)v:l q/i5 in the accompanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 k)zl:,u zf/ddx5i l)v z8i 7qhmA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown 4bnu asv+7 z.gto the right. The three bulbs 1, 2, and 3 - represented as re.ab4n+sz7v g usistors 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 rif )3;gpp yyb5b6d f5hight. If the current in all three resistors is equal, which of the following statements must be true py)d3y6f 5hf;ibbp5g ?

  99.37: The diagram at right represents a simple electric circui) lxj8;cb3te vt composed of 5 identical light bulbs and 2 flashlight cells. Which bule 3xl8c j;tvb)b (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true co-.+l c)79sd7jpnlg fqpz tm (uncerning the simple circuit shown where resistors jlg7u9 plt.- nq+ 7 )dcs(mzpfR1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andwh.qegt ab d-6c34q.t )qnvfe9h5p4 v Y are connected in series to a battery. Bulb X is brighter than bulb Y. Assume all circuit elementsbq vn443vaghp.tqq.e e5w)f- thd96c 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 will pass through the identif+:1k 8omohw myied resistor in 5 seconds onm k+w1h8myo:oce the circuit was closed?

  00.23: If all of the ,yzbd t76sr/ dy r/xz2 resistors in the following simple circuit have the same rr6t dz,dyz/xsy72r /besistance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagrab1uomr /n /2p8rd0uxm m, the current through the 6.0 Ω resistor is 1.0 A. What is the power supply voltmom2r/bx/p 0u1r dn u8age V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battk 8g6 rzmnn38ojmvu 0r ) )xywwa,7nd;ery. Suppose R1 carries a current of 2.0 A, R2 has a resistance ofmvy, nxurd 6anw))7z8g80;kjm r3wn o 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 connkc le7jr;/ s8:r*b dm *lprb2aected in parallel to a battery. Suppose k r*jpe/mb2d :l*r s;balc8r7R1 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 the maximur 521zarbg gny:0qhd1g 4 3dhqm q3rqa0hg4 yh2:bgz dn 1g15 drvalue of the current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed gvt9nqijc--1 to operate at 120 volts?- cq-t n9ji1vg

  03.09: How much current flows throuq-,:(*9z g zihu7 mznj43 a jvtllxy3cgh a 4 ohm resistor that is dissipating 36 watts of pojc-tgn xu9 l7(h3i:vljzm q 4y,a*z3 zwer?

  05.21: A household iron used to press bb;(r(b r4dwvuehs,+ clothes is marked "120 volt, 600 watt.” In ndbe;b+bw((,vr4 rshuormal use, the current in it is

  01.05: Which of the following resistances could5*nouu ,7skx 8e,ud gl NOT be produced by a circuit containing only three ix d5uegslu,8*uo ,7 kndentical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistkjc ,/.ku ;pz wjq)zj9lbx ,a5ors. Which of the following equivalent resistances Cl, wk/,uj9) xbk.qacz;pj5jzANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be connected together iny 3hvbeh+yl-y vrw.r a: 0b4t, different configurations. If all three resistors arey t430 .+yvwvh hl-beraby:r, used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is connected to a battery, a -+dv a6xbjz m5v4as 3itotal power P is dissipated in t ba6axd3s z54i mv-v+jhe circuit. 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 resiszm0 oxtpd) 2)+y*l: w0 cenypftors, having resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Whic)*oyp xzdm l+0n)pw ecty0 :f2h of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance o e9q5g rix6ja1f 12Ω when operating at 120 volts. What is the minimum amount of time that it woulr5 qxije 9a16gd take to warm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows thro4 ky+ah4pey0 iau 14rvugh a 4 ohm resistor that is dissipating 36 watts v0h 444p1ek yya+iau rof power?

  01.24: An electric heater draws 13 amperes of cub-v zzl(h/e* 4odl j5c .2g(cex skx(prrent when connected to 120 volts. If the price of electricit(-zeps*5 z (v (gb/o.4dclxc e kh2jlxy 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 yxd.xp. mh-5q to keep a 100W lightbulb lit continuously for 1 year at a.qp d-.xxyhm5 rate of $0.10/(kW.hr) ?

  12.09: A constant current ofk,9dx b+/g re9.kkhko 4.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. Whiced hkkrx./ogk bk+,9 9h one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns gqstd90x6x;q w,:z ot a computer rated at 500 watts in 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 compt;dq0gw ,6os9x txz :quters can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resi4e6c*gacpif8c l8k3 em igrgy47 w,2o stors to form a simple circuit as cregi8a g2m,kec467 8wgfyl i4 p c3o*shown 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 yl gojf.s l(m xtvg9k;1qs72n*0li6 cis connected to four resistors to form a simple circuit as shoily mxf2jgvt 1.ls 6 *q07;ol(sngk9c wn 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 resistors ared b.9k a4b iob;vq;j,y connected as show,.4avbq9y ;kjo;bd ib n. 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 w;s szzlcy::2 switch and three resistors are connected as shownl2s: zy;w scz:. With the switch open as shown 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 idqoj smg1*r(/y/fvz gqx(0/vwyu p22deal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram/yqmfv qjg 2w 2ysg1/0d*v(/zorpx u( 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,p;fr/nq)q) y 2,pphc5e fo2gg what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal ro2 e5);q),nc f/gg yh pp2qfpresistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right yy sdy5v* skj 8t .;mw8z7-jkrsp.s9uwith resistancesk8d-j9tky.;m syu . wv7zys8sj p5sr* $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram be77wd)r9 se hucq-obf lp9r7.klow shows five identical resistors connected in a combination series and parallel circuit to a vbr7fe sd9c-)97quk.7r whlp o oltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows f3b 420 l4zb5zvc ubbonive identical resistors connected in a combination series and parallel circuit to a voltage so bo 2z40lz3cb5nubvb4urce.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs) d;pzbwjk79 nny.zaku:y-ho773z ft are identical. Which bulb will be the brigh;7n a dhu:-yb.)yw nz7kkzo3pz7j f9ttest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistor-,vc5.ovfemd dj 7p3p7u mv1g2/c mhis are connected as shown. With the switch opme2i p-d7mfopj1u/ cg5m,.3 dvcvhv7 en 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 ide0m m9v mu*whfnd9y c5(al ammeter, a switch and three resistors are connected as shown. Wi0 mn*fmvm5dw9y(ch 9uth the switch open as shown 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 ammesw3 vttq6/,cb2hmjm,5qgz4p ter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter,/t w3j6 vmsphmz25 gc bqt4,q reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?