16.09: In the circuit shown, an .yi70f dbr1;fj 9 4xgoyweqo8 electric current exists in the metal resistor connected to the battery. Which one of the following choices best describes th48x7 royfjy1;iob fd eq.w90ge 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 resistors aro z;f0wi -3qwfe connected in parallel, the_________each resistor is 0iz-fqfo w w;3the same.

  06.33: A current through the thin filament wire of a lightbulb caus4ed1(y ygbuxmq70 ti.es the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens becaubuym01(i4dxe ty .7 gqse

  13.08: Some standard household lights are being repo+0p+/briuvol6o m; p laced with LEDs. LED is the acronym for which one of the following choice+o;mo/ ivulpbo r0+p 6s?

  05.16: A cylindrical graphite reso+gxeh1se2r 9r-, ph 6na v3ptiqr22cistor has length L and 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 new resistivity to the -rhi19+qgtv2 rocs, 26eneh2ax3prp old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same material. Wire II m7kb0* uy7uhxa :fk5m has twice the dikmbua x5yf u70m kh:*7ameter and twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has 16agl:wmcw;y6iv z4x twice the diameter and half the length of wire X. If wire X has a resistaz:w6m4g acxw;6y1 v lince of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. z272lky h5h slThis piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance2 lhs5l7y2z kh of this material because of this process?

  07.27: A junior Thomas Ediso jhx)mf, po6bkj t6z1px,wu 4+n wants to make a brighter light bulb. He decides to modify the filament. How should the filament of a lightbuu6b + pjh f4m1,kp)jow,z txx6lb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are mgm-hv5jlymqp ;2 (g(yade of the same material. The length and radius of each resistormml; g(5vq- gj (phy2y 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 v09ta9ye:k ws battery in the following way: “Two resistors are connected in series. This combination of two resistors is connected in parallel to a third swayte 9kv:90resistor. 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 the accompanying circuit bt63 )zgl+naudiagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter r+ 3bnag6 )uztleading is most nearly:

  97.37: Consider the compound circuit shown to the right. The three bulbs 1, le0, pievg2)r2, and 3 - represented as resistors in the diael2evrpg,) i 0gram
- 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 the current in all 4rxt:/7n:j2or q petr three resistors is equal, which of the q2 x4tp7:tre: jorrn/following statements must be true?

  99.37: The diagram at right represents a simple electr(jqv6u4 fp b2/gsg zha-j3p s(ic circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb (or bulbs) uj -4/3(hz ( pavgjfb2qsp6sg
would you expect to be the brightest?

  00.03: Which of the following statements is NOT t 9 usbrcl x9n:jqch6ov/0+sh2rue concerning the simple circuit shown whqu/o9hsjsl6:cx+bvr9h02 c n ere resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulb.i dg nbifr:b ce866,ws X andY are connected in series to a battery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connected in parallel with each othe6c ew,bifig .r:bd6n8r to the same battery, which one of the following choices best represents what is observed?

  06.34: How many coulombs will pass through the identified r qca) lt24io;zesistor in 5 seconds onz2ao; c)4 tliqce the circuit was closed?

  00.23: If all of the resistors in the following sz-0piybh* bu9imple circuit have the same resistance, wh-bz9bpu * hiy0ich would dissipate the greatest power?

  98.34: In the accompaz1x7f) pa hh 8)4awbrdnying circuit diagram, the current through the 6.0 Ω resistor is 1.0 A. What is the power supply volr8hx )b71pfh4azaw)dtage V?

  97.27: Three resistors R1, /4ecx,tx mn4ag nt+9zR2, and 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 6.0 W of power. What is +z e4ntx4 ,ax m/gntc9the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in parallel tm)*v ewmked lzoia3by-617 x :9a1z rro a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipxz:d r7 kz1)1vbewal3a reimmo9y6 *-ates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watt1h,l+gc/; d rd sjyt*as and 120 volts. What is the maximum value of t;+/,ysdg *j ltrh1dcahe current under these conditions?

  99.23: What is the resistav r4wvc;+h tq pwn:3b)nce of a 60 watt lightbulb designed to operate at 120 voltprbtqw+hn 4v v: )3wc;s?

  03.09: How much current flows throav2z(tx7 6e o+fuvlc+ugh a 4 ohm resistor that is dissipating 36 watts off+xvov7zta26 +le (u c power?

  05.21: A household iron used t 3pd;b6j6 -k+zbmza yno press clothes is marked "120 volt, 600 watt.” In normal use, jb3npazm 66d+;kyb -z the current in it is

  01.05: Which of the following resistances could NOT be produced by a cb ,-6od 5xytjd)hhs 1bircuit containing only three identical 6Ω resosjhtx -dd,1b65) byhistors?

  94.37: You are given three 1.0 Ω resistors. Which of the followinqhs*wi2. (g7z k4qee:u -kivng equivalent resistances CANNOTkh s4-* 7qqueg wen zk(i:iv2. be produced using all three resistors?

  02.06: Three resistors of different values can be 8noexb1 53ww4sx*w ;wxpx2d gconnected together in different configurations. If all three resist8*;5x1xg4dxb wxeps23w o nw wors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is connected to a8g(qsn afk+6 x battery, a total power P is dissipated in the circuit. How much total power is dissipated in k6gx(aqn8fs + 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 resistance R1 and R2, are u9c -b w:rjx4wozhc.-xtm:5econnected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statemecw: b:jw9 the5z4.rco -m- xuxnts about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12 (5g 0s lonobv4z*h8abΩ when operating at 120 volts. What is the minimum amount of time that it would take to warm 0.45 kg of wn*lzog0o(a v 48bh5sbater from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current fycbl / m7y2lxzabwv/ +0va -jhzl.09q lows through a 4 ohm resistor that is dissipating 36 watts of power? / .vvmb9b7-ay+wlal0 yqlhj 2/czz0x

  01.24: An electric heater draws 13 amperes of current when ceu7r2 hb(nz0tg w7*qmonnected to 120 volts. If the price of electrict0h 27*q(7w ezugnmrbity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how muc4b: mm9c-vmzx) + lnpoh would it cost to keep a 100W lightbulb lit continuously for 1 y-4n 9mvzm) :cp+olb xmear at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A th by9nf j-z;b:crough a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following choices best represents t;b9 f nyz:bj-che resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 500 watts in a 12s0x4alm ,bj* p0 V circuit. If all computers are plugged into a single circuit protected by a4,jl* ba p0smx 20 ampere fuse, what is the maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt batt o y8uyud;399cf3dul sery is connected to four resistors to form a simple circuit as shown to uus ol393yyu;d9c8df 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 an ev;ya9)g4z(0qyqu jdvr)5ry -;kah simple circuit as shown to theu;n krqvzy5)ad -9y h);jyegva r(04q 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 8a3ik *m to.-ls 2qwqcresistors are conne m.c-to 8kls23qiw*aqcted as 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 c5fvmz r9az.y6mu7 3 r9mrz l)ammeter, a switch and three resistors are connected as shown. With the switch open as shown muf r) 3z9.597a6zrm zylrmcvin 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 ammeter, a switch and three resistj5d9kkc xr)*lipc4p k *;bwzx).4 edxors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes .kpkr5ez)d iwjcxd;c kl4)x*49* px b.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit s i(q1c/xwetgi l,a9kr4wtznf6c; w(6hown to the right, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistw;6gtf1iwc zw(6 9e /cli4anxq( ,krtance R.

  09.07: The equivalenty;o)tn0d+ur86rs uqv resistance of the circuit shown to the right with resistances8+ rv; )dr6 ot0sunqyu $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connec .dpqb3m/yu ele6u1u/ ted in a combination ser u/.u 6lmuq1p3d/beey ies and parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows fiv-* g*w:cu.p 3vsrgxwle identical resistors connected in a combination series and parallel circuit to a volp c * w:swulx3*rgv-g.tage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, av6v po+s*ny )(fzw0vc ll of the bulbs are identical. Which bulb will be6 (0+nzpyvvowv)csf * the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and thrblx0m 90 -n9uahwpes,at gi;/ee resistors are connected as shown. With th9u wg l ,i/;h0bamxe-a p09tnse 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 resis yn9hpr/3qgx: tors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 a 9pg3y/ hnx:qrmperes.
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 resifkgsv/r)1we1.g ,r iihu:9 qwstors are connected as shown. With the switch open as shown in tigsu/ ,rw:h ge1fwkiv 91q .)rhe diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?