16.09: In the circuit shown, an electric current exists in the 9)3 gavl +waffy* ;wwh6dh/z vmetal resistor connected to the battery. Which one of the following choices best describes the direction of electron flow through the resistor and the direction of the ewhz av 6v9g;ydw/* hwfa3+f)l lectric field through the interior of the resistor?

  98.06: When any four resistors are connected in paralle9 1e5f8 iqgv srwkv0/bl, the_________each resist 9qei80r skgvv15/bwfor is the same.

  06.33: A current through the thin filament wire of a lightbulb:dwi:r)aa0b( pqi9d kc5 y -wj causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens becaui0 i-pj)wqy5:(w9r dc: ab kadse

  13.08: Some standard household lights are being replaced with LEDs. LED i1/h bb5:hg.jd2 z 2ki4kdqfsi s the acronym forbf42 id5sj.2k 1dbkih z:/qhg which one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional aicvl(w sb; 6+lrea 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 re(v6 +csliwb l;sistor?

  98.20: Wire I and wire II are made of thed7pubi 1c2n7obu06ydsin, jkrt9 ,i 7 same material. Wire II has twice the diameter and twice the length of I. If Inyc6717d,7 okb,p2 ndr0b9ijsu iitu has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diamkfxua 0j sfu3r52o2+ieter and half the length of wire X. If wire X has a resistance of R then wire Y would have a rej2fi0s 2uu3+x5oar k fsistance of

  03.23: A cylindrical resistor has length L and radius r hr/+6tgnmzy p shhb wt uy1s;dy((+)/41 uqjr. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistan(hgmyb z;+ qryh1 6rud/syu(ttp/j 1h 4+)s nwce of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He decides to 9 fc7h :j ruu(q*(cgm,jj5 t1sdg:btt modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at a giventc t ts1mu7j((hcf*bd:g :9 ,jrugj5q voltage?

  16.07: Three cylindrical resistors are made of the same material. The lbsan2*1t wqz; ength and radius 2n ;szw1q*abt 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 resistance R, arhs77kc4r1 xene connected to a battery in the following way: “Two resistors are connected in series. This combination of two resistors is connected in parallel to a third resistor. This set of three resistors is cos 7ck7ehnx41 rnnected 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 diagram has internal resq rz5*u m;79 8akkseouistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearlysm89uko7rqek;* u 5za:

  97.37: Consider the compound circuit shown t2way: f)y rb1:dy r2hto the right. The three bulbs 1, 2, and 3 - represented as resisy yb22ht fa:r:y dw)r1tors 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 ri: 42ykn g6xwrjght. If the current in all three resistors is equal, which of the following statements must be k6yx gw :4n2rjtrue?

  99.37: The diagram at rigup0qa9ai mj37 ht represents a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb i3aj q70ump9a (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements i*pw s9yesvyw72r v ,b6s NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have equals6y9b7* rwv2vpyew ,s resistances?

  17.29: Two lightbulbs X andY are connected in serieswxnj4u 95zky5 to a battery. Bulb X is brighter than bulb Y. Assume all circuit elex n9k5ywzju54ments 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 t+fgqi qn1,jo 9ot/;e she identified resistor in 5 seconds once the circuit was qs/i ong;tq9o1 e+f,j closed?

  00.23: If all of the resistors in the fol:z8zjhtsfw:) -oac3ljl:u n , :/tk lwlowing simple circuit have the same resistance, which would dissipate the greatest pon3tac - l8:lo:hju:s)/zk f:z,jwwt l wer?

  98.34: In the accompanying circuit diagram, the current through the 6.0 Ω pq+ 0d zyp)m)9i,t2c,txwjb h resistor is 1)z ,y+9 tq,i)bt dwpphm0x c2j.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connecte1dt.g kk9sx*n9;kug rd 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 the voltage across Rd;sk1gg .k xu n9rt9k*3?

  99.40: Three different resiztjr.h/b9 *nzstors R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipan* .htzrj/ 9zbtes 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What is thb:nc94nw+3jv n3ewp se maximum value of the current under thes+ 4sw w3nbp:3ncj9n vee conditions?

  99.23: What is the resistance of a 60 watt lightbulbbrvq p) ;ljg.av/*98/m wthip.ri.h gbd b93h designed to operate at 120 volts r v.hp;mqbi hpthgibja w .l3//8rdbv 9g.*)9?

  03.09: How much current flows throughv:8)d ea .2ga/lq aifw a 4 ohm resistor that is dissipating 36 watts of powe 2il8ad/a ):. vfweqgar?

  05.21: A household iron used to press clothe6,p3vw:/o1lwztk ogz )ae 5lds is marked "120 volt, 600 watt.” In normal uselkto)vze6z: ,1 o wl3 a/wp5gd, the current in it is

  01.05: Which of the following resistances could NOT be produced by a circlsepe7 o i/g1aot-qh0r g5 6.huit containing only thr 7i.6tso5hrpege-q hgao/1l 0ee identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of thmlsge2elrv/2c:caq o ( t)76fe following equivalent resistances CANNOT2meogvf6r/7 )c(sq el2 calt: be produced using all three resistors?

  02.06: Three resistors of different values can be connexbcgp (+ tws+7cted together in different configurations. If all three resistors aregwt pc+x+ (sb7 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 total powerf.o q4 5q zdfjajpd8z67( ;exj P is dissipated in the circuit. How much total power is dzqzdqj8e5fjdo f(4;p. j7 x6aissipated 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, ha+hk:zj spzb+) ao(dt, ving resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the rez o( , pks+zb+a:htd)jsistances is correct?

  02.46: A hotplate is designed such t,7 vsu75admc 5h-dgd that it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of timm saguh7c-5t7d ddv5,e that it would take to warm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much curren*syfm,q (* ic,i -wogst flows through a 4 ohm resistor that is dissipating 36 watts *i qws icy so-,mg(f,*of power?

  01.24: An electric hean82pk g mhpr99ter draws 13 amperes of current when connected to 120 volts. If tn2p 9 rhk8m9pghe 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 keep a 100W lightbh:9q8-a hwlii ulb lit continuouslyq- iwh9hl:8ia for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in a power of 24w72 ixl(;b-ysk0klgy; id/ kz.0 W di;kzbgx7 lsk/(0w2 ;ykyil- associated with the 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 computer rated at 500 watts in a 1jqawhk3rn i4*fxrt85g / v o*220 V circuit. If all computers are plugged into a3wj8kr q4 /5rnx*igf 2at*voh single circuit 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 connebnd1bax0 j2 6xcted to four resistors to form a simple circuit as shown to 21dxx60nb jbathe 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 a cotabo7;a zp-0g-. tqsimple circuit as shown to the rig0tc z tb-7- apoq.og;aht.
What would be the potential at point B with respect to point C in the above circuit?

  02.21: An ideal batterrhe/ l+)gx8fjcev 8/ ty, an 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 amp8/8+rh g/ )fcejlvexteres.
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 resisto ktf*cu,ge8dy/ 5hk *,gril-trs are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amgu,c*/ ti d*f5kr k-ytle h8g,peres.
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 resistorlgyepsb 0u.pkk1kd 3/)s/g8d s are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes.s3y dp1sk0b.gku / k) lpd/e8g
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 equivas zkc 1g0li(r3lent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resi cz0ls1rgk3(i stors have identical resistance R.

  09.07: The equivalent resistance of the circuit -( c.7mrdjiph5j.w ekyrn(9 bshown to the right with resistances.(jn 5pdbew(hy7cr-ikr m9 .j $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a comb1 msl4sz;+ nvxinatis;lsn+ 4z1xmvon series and parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors conm,s.dw . yuq*znected in a combination series and parallel circuit to a voltage sourcyd.uz ,qw.sm*e.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are io*xc:rma* tk4 dentical. Which bult:x**ckrao4 mb will be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switfn j0h 1ue*q6hch and three resistors are connected as shown. With the switch *qu61e 0hn fhjopen 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 resi*ny ny0qn8b3 q1mf 0,euv8csm w80*q0yixcj ustors are connected as shown. With the switch open as shown in the diagr mbmjx*ncuqq, y8y s803fnv0cew 1* 0uy0qni 8am 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+ht8n yjac :r1 ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the ditj :rycn18h +aagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?