16.09: In the circuit shown, an electric current exi7i0qopk,c eu7sts in the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flow t70oiuc e7,kpqhrough the resistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are co i7du56j21jz 5rr x;;iysvxgynnected in parallel, the_________each resistor is dgyizrys 5j657u21 v ;xjr xi;the same.

  06.33: A current through the thin filament g,56vemaq8 fjwire of a lightbulb causes the filament to become white hot, while the larger wires,vem fqjg86 5a connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. LED is thel-t fxy:kx-c6 acronym for which one of the followinglf x6ktcx:y -- choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectiq; wv+8izqwsb)w r5s /onal 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 new resistivity to the old resistivity of the cylindrical resibvr ;+q/qw w)5zw8 ssistor?

  98.20: Wire I and wire II are maun8(ld23vl4s i85h v tb jcl-hde of the same material. Wire II has twice the diameter and twice the length of I. If I haj(svv8b8 l4tl23- uchidln5hs resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twic o2jk1kas : q4xb0zca8yq1b)ee the diameter and half the length of wire X. If wire X has a resistance of R then wire Y wo)0xy eqoa b 248 1zk1c:qbjsakuld have a resistance of

  03.23: A cylindrical resistor has length L4j (szo.vpl(b and radius 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 because oj.( slpbzov4(f this process?

  07.27: A junior Thomas Edison wants to make a brivq: j6zl).r:wrht )z,vq si2dghter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in oriz:6q)r:hw ,jzs2lv )qvdt.rder to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same materi2 h k(rmvig 6raw/cy7:al. The length and radius of eacg vk2m:(y/7whcia rr 6h 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, ar;c 6io lqjcx4*e connected to a battery in the following way: “Two resistors are connected in series. This combination of two resistors is connectc;x loqj* c6i4ed 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 ta-p,9zcjn;ls 86 njrg he accompanying circuit diagram has internal resistance 10.0 kW and the ammea68;cs9r n,jz g jn-plter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the comy3pcq7d9 aw g5pound circuit shown to the right. The three bulbs 1, 2, and acy 359pdgq7w3 - 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 electrical circuit at the right. If t8x1ag w)m iq0che current in all three resistors is equal, which of the following swq )aimx0cg1 8tatements must be true?

  99.37: The diagram at right represezh w,bb spx +xkgw2677nts a simple electric circuit composed of 5 identical light bulbs and 2 flashlightzgw,pw77k6x2 +xhbb s cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true comtsb fl x7+:a*s g4n8qncerning the simple circui7*mx ba fgsqln4:8+tst shown where resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X is br7i,qmtkx c3 /b us/,gtighter 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 bt/kqxtcu 7s ,/g im3,one of the following choices best represents what is observed?

  06.34: How many coulombs will pass throughon 4/e,h +loif the identified resistor in 5 sec,+ hfnleo4io/ onds once the circuit was closed?

  00.23: If all of the resistowotnl9.;bpc4 qwdsth7u5 o p1 wu ,s/:rs in the following simple circuit have the sat.wp1w;w4/n usc5l s7:,u qt 9pb doohme resistance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the cuuuvp225y b9 qlrrent through the 6.0 Ω resistor is 1.0 A.u 5qu2 pb2l9vy What is the power supply voltage V?

  97.27: Three resistors R1, R2, a-xe0 n-zc-m ku6sy lum*qnm 13tc, 9hi3 r-phbnd R3 are connected in series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.clp zrx biu3 -1-tec*0m-9yu3 -m hns,qh6mkn 0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 a ei-3y(do r+ymre connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 disy3y(o i-r+d mesipates 6 W. What is the current in R3?

  99.13: A heating coil iu3hfv.y pstw9r o7o+bwt ;t63s rated 1200 watts and 120 volts. What is the maximum value of the tbto3w+;vw3ty.osfupr7 9 h6current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed tdl/r.o+f o6 h5a,gcnto operate at 120 voltt .ar5dnc/oo+6f hl,g s?

  03.09: How much current flows through a 4 ohm resist82azcsjzh4o*r)yi my / s* um;or that is dissipating 36 watts of powerhjmiam2y*;4z r /ycs ou*sz)8?

  05.21: A household iron used to press cl(1v72 i8pluo bbc3jqzothes is marked "120 volt, 600 watt.” In normal use, the current ilip 3b7o 1uz( b2cj8qvn it is

  01.05: Which of the following resistances could NOT be produced by a circuit coh.,gadj.;h(uke rdw-59mts wntaining onlyj5 ewr-k(adh tgw,; hsd9.u.m three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following equivalent p 5ryqs;ps-2rc0 nj cfc5e/4sresistances CANNOT be p;r /c qrscsep45 csn25jy0f-produced using all three resistors?

  02.06: Three resistors of different values: d;pnybk82 bz can be connected together in different configurations. If all three resistors nb:8kd;2y bz pare 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 tcc:.w;ohz1 ckkiii, 1x.yr s0otal power 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 battery? Assume the internal resistance of the battery is zero.cc.x;k:i. kizs10 hy,wor1ci

  96.16: When two resistors, having resistance/kvx7 0oxz v.l R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the followinglo0zv.v x k7x/ statements about the resistances is correct?

  02.46: A hotplate is designed suxs2txm/ jn,y 8ch 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 xn,sxy2mj/ t8 water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor that is dop-.en*vi by2 issipating 36 wateo n.*p-ybvi2 ts of power?

  01.24: An electric heater draws 13 amperes of currej+kac93 cauii:t * oc.nt when connected to 120 volts. If the price of elect9c3aic.* :uok+tc ijaricity 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 to keep a 100W lightbulb z0 -3y-sqoypxlit continuously for 1-0x zq3y y-osp year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb regj 9 +q+jj*poxsults in a power of 24.0 W associated with the bulb. Which one of the following choices best represents the resistan pq9gjjj*+x+o ce of the lightbulb?

  01.10: Each member of a family of six owns a computer rated6qe2(p iee40fd w o7u97fmm gb at 500 watts in a 120 V circuit. If all computers are plugged into a single ciree7e(ubm74p f2 fmog wd96i0qcuit 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 cox 6qek yku+8qno-bbwz b81i6 .nnected to four resistors to form a simple circuit as sw -q ubxq6enkk bo8y6.i8+1z bhown 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 to fourh*rfl jpat w2 +0fo/(t resistors to form a simple circuit as shown lat/ht*(2+pf0 rjwof 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 are xn;nu jo)3ubfh+ 4 t+hconnected as shown. With the switch open as shown in t uo4b+fhh3xujn; t n+)he 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 batter :y:.w mgz/ckk4czs .ny, an ideal ammeter, a switch and three resistors are connected as shown. With the switch openc.zn k:k4:/zsg c.wmy 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 amme-kbljujktl;+)r4g m7 ter, a switch and three resistors are conne+mjk4t;k r-lu)7 jl gbcted as shown. 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 rightln unsb+w i-,-; cj;tx, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resxj -;nu ,is-wbc+ l;tnistors have identical resistance R.

  09.07: The equivalent resistance o: splsrb8; 7 s(pr3;wxwwmne 5f the circuit shown to the right with resistanc w e578; rpp:wn;rlsm(b3ws sxes $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identicag+( cwx8/ mkhhl resistors connected in a combination series and parallel h8g+mcxw/( hk circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connected in a combinan e bduwiucw*sj/)i j/pz5;y c81 7x8ation series and parallel circuit to a volta/c5biwz)yepc /1 ws8unja dui8jx7;*ge source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are mzetd +s5 qi97ic,5wv identical. Which bulb will c m+59twe ivd, 5zi7sqbe the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors are conn t0z6)hrnaoq3 ected a0q zon)3 hart6s shown. 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 and three resistors arg ;qv1wov r9m4e connected as shown. With the switch open as shown in the diagram the av94 rm; oqgwv1mmeter 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 7nrv/ahskli ;c)jo4m)q+ nd si9 0u)wresistors are connected as shown. With the switch open as shown in the diagram the ammeter reads cwn9klq) r+)uh4/ )jssadiov m;7i0 n2.0 amperes.
When the switch is closed, what would be the current in the circuit?