16.09: In the circuit shown, an e8d/ 8c7zi es;j otk9zo w8ty2m:wvz/ ,s6jlf ulectric current exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flow througl,e:vc mf ydwos6/8;kt27wszjz 8o 8i9/z ujth the resistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are connected in parallc c svw;g*1sf:nt 2ob1u ouno75ofp)1el, the_________each resistor is the sgvo2* 5 w1ff1nobsto 7;o )1u:npucscame.

  06.33: A current through the thin filament wire snyrnbi2/i m, p:f7q1 of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This hapnrs7f/:yi2, b i1mnqp pens because

  13.08: Some standard hor4 5awdrjj.1*w -z re +bokuk.usehold lights are being replaced with LEDs. LED is the acronym food.wjrzbju 1a.r ke* w-5k4 r+r which one of the following choices?

  05.16: A cylindrical graphite resistor has lh 0*.co 4vcgaczt: v0iength 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/aog * iz:c4 v.v0c0thc2 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 the same material. Wire II hasjbwjb:c* 1 6:oqf ey-y twice the diameter and twice the length of I. If I has resistance R, Ib w- 1:qyc6 ebjo*yj:fI has resistance

  99.31: Wire Y is made of yr t;kzqxb*,+yap4r 5 d/8bef the same material but has twice the diameter and half the length of wire X. If wire X has a resistance of R then wire Y we5*tb ky qfa4;8,dzr+byr/x pould have a resistance of

  03.23: A cylindrical resa abqw9g a;(nwc 4a6j7istor has length L and radius r. This piece of material is then drawn so that it is a cylinder wij7w a4 6agqc;bwna(a9th 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 brighter light bulb. 7yqzvuh .3(3 .nsfq xhHe decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightb(qf. h3hn 37xsv .uqyzulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same matdp2 h-wn1 4mrwerial. The length and radius of w1hm d2n-4wpreach 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 battery i44qs,w)t e,dh kjauqna2t2 4tn the following way: “Two resistors are co, 4h ekatjut d2qtn24)s4aqw, nnected in series. This combination of two resistors is connected 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 fz2 pk)q t5 k,+1voer; ;nkczcin the accompanying circuit diagram has internal resistance 10.0 kW and the ammeter;env;5)pkkqk zc r2,ftco +1z has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circukl ilivk)d vg3p94ug gp136 x3it shown to the right. The three bulbs 1, 2, and 3 - represented as resistors in the diagram kd)3lgxl4p 6gv39i1 k pgiu3v
- 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. I l)f73smpd l3of the current in all three resi flm337lp)os dstors is equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit composq02 qf;p9yuzi ed of 5 identical light bulbs and 2 flashlight cells. Wzfyui2q; 9p0q hich bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the simple ciri0+wr0.igi+ 296 v a) jtluya-afjk lxcuit shown where resistors R1, R2 and R3 are have equak)6ra0ix+2v w9tj0l -igu.faiy+l ajl resistances?

  17.29: Two lightbulbs X andY are connected in series to aed dcapusd2e6;nz0s b9ce/7ugc /6 (k battery. Bulb 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 following choices best represents what is obscg n07/d 2d 9zku;sb ccedsu (/pe6ea6erved?

  06.34: How many coulombs will pass through the identified resistor inupq 99du84pe ,1zla )mxfsq p7 5 seco9dp,aquspmqu 791f)4 x 8e lpznds once the circuit was closed?

  00.23: If all of the resistors in the following simple circuit6pbeo; qz;) zz have the same resistancepbzzz 6);qo;e, which would dissipate the greatest power?

  98.34: In the accompp9 6l r4sbmb okc(4k3ganying circuit diagram, the current through the 6.0 Ω resis mog r4bsklp3(6k4c9btor is 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connm 6mv xp9iqio)m)b7) yg 9ky9aected 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 powe) 9m poi 9v7 qa)bik6m9)xgmyyr. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connecte9q8 mmt6juy)mro n e0tq:r, q3d in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 Wmqeoq8, yu 9mn3t q0tr:j6)mr. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. m)teujj4j +l 6z* 3eu88axelx What is the maximum value ol 84a83ej+ue u*jmejz)xxt6l f the current under these conditions?

  99.23: What is the resistance of a 60 watt ligh 6i 8eacypa(qer 50k+ qme.b5btbulb designed to operate at 120 vo iprbc6qb a8 5y.ekq0ea+(e5m lts?

  03.09: How much current flows through a 4 ohm s z(r ub8q:m5d6rdtgx(y v77 xresistor that is dissipating 36 wat6 r7m(87gy5vs uzq (bd tdx:rxts of power?

  05.21: A household iron used to press clothes is marked "120 volt, .dzx ypta003) cqwf p4600 watt.” In normal use, tfzp.td yw 3qcp 00ax4)he current in it is

  01.05: Which of the following resistances could NOT befdk 49;qd7x xa*(wtxain m5* b produced by a circuit containing only thre9 kwmfxd7at abq*x4i5; xn(*de identical 6Ω resistors?

  94.37: You are given three 1.0 Ω recsxmi.,vy s1*t1(do v sistors. Which of the following equivalent resistances CANNOT be produced using all three resistorsmx* t y.cvo11 ,vi(dss?

  02.06: Three resistors of different values can be2suko7l99+9su. i jembhww4h connected together in different configurations. If alwum4b i7oeslkh2 9+.h9ujs9 wl three resistors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistore c *m0n5zjo6( lxy8sk is connected to a battery, a total power P is dissipns8m j5eol( x60 yz*ckated 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.

  96.16: When two resistors, having resistance R1 and R2, arb:h+ods b/ 6ove connected in parallel, the equivalent resistance of the combination is 5Ω . Wo b/dhb6+: osvhich of the following statements about the resistances is correct?

  02.46: A hotplate is designed suchs mq(tu,m3h4) vz 9uak that it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount mz u,s)u 4q9mhtav3k(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 iy1q( ,oryqk++h r n-hmie)2iusnjj ,1s dissipating 36 watts of powehj1io1+-ekrqy y,u hmn s 2r+,niq)(j r?

  01.24: An electric heater dray:m3b)p tme7 dws 13 amperes of current when connected to 120 volts. If tbdym:) m7te3p he 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 cost to keq+b b 69gl8:d* lmo :c2txmqctep a 100W lightbulb lit continuously for 1 year at a + l:md9obg2m bc8*xtcl6 qt:qrate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.0fl (6j+ry by0u0 A through a lightbulb results in a power of 24.0 W associated wy +jbl(6fr y0uith the bulb. Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six ownsg5w2 (vz uh rnq14nw(l 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 computers can be operatin2 1uwh(nznrwv5g4( ql g at the sametime?

  03.16: A 9-volt battery is connecteduu ssby i-sj76)6a5ao to four resistors to form a simple circuit as shown yo- si5ja s uu7sba6)6to 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 resih9t4e(y(l e*drz luh1stors to form a simple circuit as showyud*(eth1rl49hzle ( n 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 -dokto.s3v z9three resistors are connected as shown. With the switch open as shown in the diagrak- vtoo s93.zdm 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 ammeterju v0h d6f*r94swor u*, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammetehfru jw 6*o4srd*u9v0r 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 resistors agp2bzmia75w/zf3j4k8 e9fnnq0p /8s- btcjnre connected as shown. With the switch open as shown in the dn3zbcq0 zt i/8ebjknf8fg4 7 sm5p wa2/jp9-niagram 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 equivalent resistad qy 7mzfcis8me,;*9y nce? Assume that all wires are ideal, the b;7zsy9 icq m d,*e8fmyattery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circ1x a/ 2po1cnm w,s.xznuit shown to the right with resistancenpc,x 1ozmn1xw/2 .sa s $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors c ,1og6e4i tnpeonnected in a combination series and parallel circuit to a volt1n,6iet 4pg eoage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connected in a combinatc *li8wv8p s1vion series and paral1ip* v8 vsl8wclel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are identical. Whichw ()wm6y8wyla bulb will bw(alw6y8w )m ye the brightest?

  02.21: An ideal battery,wlq5v3ni.z)f.cy+ kd an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the amvz3kic) yqwd. 5n f.+lmeter 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 resistzavjwsra*-76 6bnc4 rors are connected as shown. Wit 7sabr4rjwnc z- 6v6a*h 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, an6a c*rc9 xzc/ h6soexe 0.1q4,poyyjx ideal ammeter, a switch and three resistors are connected as shown. With the switch op0yz xxepcj*/o9a ,6e c.hxsr 4 oyc1q6en as shown in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?