16.09: In the circuit shoc8 ww ;6 ymwck3+8ae-3eag-uc*cg3mld )fuvewn, an electric 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 ane lv cmee gf 8wac;3 +*ua uwd3y8m)-k-6cg3wcd the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are connected in parallel, the_______ i*u- zhbty g*ayld2mm:(h6r6 __each resistor is the say(hi6r*ydbu- g l*6amhz2t m:me.

  06.33: A current through the thin filament wire of a light: ,xj yd*d6av:fmgj5us*j yt0bulb causes the filament t tv dmy,jsfu 05j6yajd**g::xo become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lig-m4e/xm*ld zx.g dnq 7hts are being replaced with LEDs. LED is the acron ldxe*mnd.7 4-x/qzgm ym for which one of the following choices?

  05.16: A cylindrical gr4,e tfhtb6,s1zo r r(laphite resistor 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 i tfh46t r,s,obl 1zr(es 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 has twii 9/ 3s y3xk;in4op j5v hc4chlsh:rx;ce the diameter and twice the length of I. If I has resistance5 rk3n4x x;4hj cp/hi9; v s:o3hylsic R, II has resistance

  99.31: Wire Y is made of thyg laexi0*:2 ruc7.4titc; nw e same material but has twice the diameter and half the length of wire X. If wire X has a resistance of R then*2uc;ecnt4:l0igit wy.a rx7 wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and ra;odu hfj5qo syik3ss 01 -;wt1dius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What had sk0h-jyoosi 3;q5u1 fw1ts;ppens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make amclz.c2)v nmo5 (wain7)ck9 c brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at a giv9lwonc k)2.czn 5cmc (am7)vien voltage?

  16.07: Three cylindrical resistors are ma3 m4 s+mqx iev(r.yig 58w-*if3crcscde of the same material. The length and radq imix(m8cw5s34 cf3r *icy+v.e -gsrius of each 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 resah .l+v9w qwo -0vv2esistance R, are connected to a battery in the following way: “Two resistors arq9-s vvah w.vlw+2 o0ee connected 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 in thy1 .fz u(dwo+)eiic2t e accompanying circuit diagram has internal resistance 10.0 kyi fec(1)o2zwu+tdi .W and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The three bulbs 14gme* ag-7xz.py/p jm, 2, and 3 - represented as resistors in the diagr- gx4/.*ppj7 egzym amam
- 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.;wven cov.t320qdp3 ljn b 1s electrical circuit at the right. If the current in all thb1.onel;23 t.pj cwvdv q0s3nree resistors is equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit cai 68/gsaj0jmd 0ilev,: 3swwomposed of 5 identical light bulbs and 2 flashlight3 ajv0iwea is:mg8ls6,0d/j w cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT truewua d3yipgs ,jlsby: -*g-c+8 concerning the simple circuit shown wh 8pi*-u3d-j,gssaygwb ly c +:ere resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are 7wnaug qrnk6:mgto9jbgi c;00fb*) 3 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 other tgbcj67m 0:u;nn gq0k ba * 9irgf)ow3to the same battery, which one of the following choices best represents what is observed?

  06.34: How many coulombs will pass throuvr;g 5)z o wt5yp1rp6ogh the identified resistor in 5 opvrgo6w5t z1)y ; r5p seconds once the circuit was closed?

  00.23: If all of the resistors in the following simple circuit hav j(xzv1by u4g7e the same resistance, which would dissipate t(4jzy ubgxv1 7he greatest power?

  98.34: In the accompanying circuiqvu f+bc++-f at diagram, the current through the 6.0 Ω resistor is 1.0 A. What is th fa-q++vbfc+ ue power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battery. Suz,c.,5qv am8h/xb:xgz + bc zbppose R1 carries a current of 2.0 A, R2 has ax5c.h bx/ ,mvq+c:z8 zzg bb,a resistance of 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 connected in parallel toe*q9 2/fgihuq;bhp u- a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the cq*;e/ 2p uubfhg9i- hqurrent in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What is th ,+e(z s3bp*5wnewrdle maximum value of the current under th ,l*w3zd5+rne( swepb ese conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate at 1a35 0gm 4+ d6wavolyxi,ca.pr20 volts?g.+oay4,xrda 3 p v650ialw cm

  03.09: How much current flows through a 4 ohm resistor that is dpl-w;*et vhr 0issipating 36 watts of ple vt-0 rwph;*ower?

  05.21: A household iron used to pre:ktb9buj tblel s0)a(: 2z9nhss clothes is marked "120 volt, 600 watt.” In2(j 0l:bbb9s ) ktau9 lehtzn: normal use, the current in it is

  01.05: Which of the followingjad2tm. zwx-8umjj 1 / resistances could NOT be produced by a circuit containing only three /x.tmmuajdj- 2 z18jwidentical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following equivalent.0kk qgeufy 1v7q05bj resistances CANNOT be prodj 0ybquk fgk5q1 0ev7.uced using all three resistors?

  02.06: Three resistors of differer472xc;) vrpdirm v5a nt values can be connected together in different configurations. If all vi57) avdm;2cp4rx r rthree resistors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is connectedc.vkxtm8v5aza, 67u c to a battery, a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if n iduc5kc6a8azv7xvt . m,entical 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 R1nf vn(. t6thn jm/ eb.e.uol35 and R2, are connected in parallel, the equival.t ee mtv /6 j3nfn.h.on(5ublent resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω when operaw2)+.+vy8 gsf 2:mhkc wq i* 1ufhwohsting at 120 volts. Wsfu+gm 2q.hw*oh f:h2+1wsck )v y8i what is the minimum 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 is dissipatingjbd:1i:po8 :n jm+5 v/gdeueb 36 watts of pow bojmbg8 dv:n5/j:+edpieu: 1er?

  01.24: An electric heater draws (p.g wifh: ) so7bsiuz86 ier513 amperes of current when connected to 120 volts.z igoerbu7.6sh:fw(5s )p i8i If 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 cost tof yfl1 t8;mh2rh9d9zrca3m. m,y m6yj keep a 100W lightbulb lit continuouslyr 9 af.mlhm9t h,8md3cm 6f;yyr1z2jy for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lighej/ftvo1 zdic ,8nfc-p)m3a3tbulb results in a power of 24.0 W associated with thmicjd ,oz a 8fvn3fp)-1/ cet3e 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 computeo9e c1- y3nxbor 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 numben-oeb x 31oy9cr of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resisto3hkk9m,c l +lrrs to form a simple circuit as shown to the rigc9,r3mkl l+hk ht.
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 a simjv)cccd2 mmo 244qxy6ple circuit m6c qccx4jy4od2)mv2 as shown 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 4jlps+wxmn( p2aurf:wx j6r m8* do9. ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes.(wxf m*6smrralpj xp : w 4.on+d89u2j
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, an ideal alh,mibx1 ort-8e:eo.mmeter, a switch and three resistors are connected as sho-r:iooe,me. hlt1x8b wn. 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 ideal ammeter, a switch and threswcm9hz) /pz 9,qyp/me resistors are connected as shown. With the switch open as sho 9cmhzps)qpm y/w9,z/wn 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 circuitq hu/t0cgr/j 1 shown to the right, what is the equivalent resistance? Assume that all wires are ideal, the battery has no intern rqt/j1c ug/h0al resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the rightr;l7yugz* qdosr0js2 + c8y c0 with resiss*rzjc lgqy+dc o 0y7802 ru;stances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors c;p/gkjs3s0ll bwe 9y/onnected in a combination series and parallel circuit to a voltage sourkpy9lebl j;w3g ss/ 0/ce.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram bel4q-o6wh d:mf)qac s+)v lx o0wow shows five identical resistors connected in a combination series and parallel circuit to a voltage sou c4)vwool)fxm:6a+wdq 0 sq h-rce.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are identical. Which bu /.g-a( jw9 7mll d)5p5puaivpd r/wrglb will be the (jg)l/v5- ip a a.wdplm 7 r/gurd5p9wbrightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistohbvt *;vtu0.c rs are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0t0.; vuvc b*th amperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, an ideal ammsm1 f2y)iw2oyeter, a switch and three resistors are connected as shown. With the switch open as showm2s1y i2o) fywn 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, auw- *b n9:bwj 81dvuxin ideal ammeter, a switch and three resistors are connected as shown.xb u n9ib8-d: *jvuww1 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?