16.09: In the circuit shown, an electric g4rrr) ufqj9.av8);fbnw 4 gc 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 and the direction of the electricjg u 4fqr. ncfw48)ag)r9;v rb field through the interior of the resistor?

  98.06: When any four resistors are conne-u smn (-4 4om(/ q,x)oxybl gxbi9boqcted in parallel, the_________each resistor is i( -gms4o(4 booyl xuq/mb,9)-nqbxx the same.

  06.33: A current through the thin filament wire of a r:d6d vj6 +mp5k83 l a56g.qwxnxaaau lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cwqxd. 6m r8ax an5:+6vuk 6paa l3gdj5ooler. This happens because

  13.08: Some standard household lights are being replaced withpu :*c2w56y*enl p2naown 3jz LEDs. LED is the acronym for which one of the following cp26u :*zw2yol nnwpec 3a5*n jhoices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional are, zj ,adi)bbs9m3faff60k:fa a A. It is to be placed f a:0)fm j,bza9ika6f,s 3b fdinto 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 resistor?

  98.20: Wire I and wire II are made of the same material. Wire Iv ffx 7dbwe7y,qw79rxyf3y;; I has twice the diameter and twice the length of I. If I has re 7yxeq7;wrw9ybfdx;37vf y f,sistance R, II has resistance

  99.31: Wire Y is made of the same ma uass*,bpfq;6jzv1 y, ;j/:ngqg gvq: terial but has twice the diameter and half the length of wire X. If wir ; qj;g qz:qjv,6vags:bufy, g/n* 1pse X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radiernr(.1j.)9 nz pmjpius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the r p)mpjnzn9er..r (j1 iesistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bm jczpxh tu,9 (;x96t.(3r +qnipxayyulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light nxhz6p9xmu; 9yi(r (3ajqp.+t,cxyt at a given voltage?

  16.07: Three cylindrical resistors are made of the same mat6 cfzy eq9n0d4erial. The length and radius46n9qcdy z ef0 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, are connected to a battea+ yj9emp*uys45,l ju ry 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 connected in series to a fourth resistor.” What is the equivalent resistance of this arran*lju94as yum+ y5,ep jgement of four resistors?

  95.35: The voltmeter in the accompanying circuit dia0n2)ck nfsu3 u,sy1m hgram has internal resistance 10.0 kW and the ammeter has internal resistance 2sk3 s,m10u2fyn)ch un 5.0 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 thr m80fz h.o*bogee bulbs 1, 2, and 3 - represented as refh.0bo*zm8 o gsistors 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 simplel pj ;h:u.qjs3 wif0,x electrical circuit at the right. If the current in all three resistors is equal, which of the following statements must be true? qj3ijl h ,.fsp0:wux;

  99.37: The diagram at right represents a simple electric ceo40gjawg/,4fiu aj8* d hu2circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb (or bulew,dah *gu08c fj 2j4o4u/aigbs)
would you expect to be the brightest?

  00.03: Which of the ,k 0emym,-en ufollowing statements is NOT true concerning the simple circuit show,ym eeumn-k,0n 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;i zu(vkogvik 13z. m5 brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connected ii.( v 5;g3z1komukivzn 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 passckte+qjy*s+f 4zfz 4) through the identified resistor in 5 seconds oncezy+qt jf+z*k4)4ecs f the circuit was closed?

  00.23: If all of the resistors in the following dx2)8d /s16z wlju oaaf9g0i tsimple circuit have the same resistao ds)zjt86a0w lf1igd9/xua2 nce, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the curreqad7kz,z lr k ,* 9re8afe6cny(d)14ukop l c6nt through the 6.0 Ω resistor is 1.0 A. Whlcze)au p4l7r c(ko,*fad1dkk 6n9 z6er8yq , at is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connectghj 2j1mn; rj(ed in series to a battery. Suppose R1 carries a current of 2.0m(1jjgj2nh ; r A, R2 has 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 to a z3t0jap (ac)(a e uao3 yra80zbattery. Suppose R1 o0 uzpa(e az(yjac80 aa33r) thas 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 vol 3a./uk q o;emgqeby)+ts. What is the maximum value of the current under t eqmu;/ +)g3.y okaebqhese conditions?

  99.23: What is the resistance of a 60 watt lightbu nwl-zcebw 1.9h :tq9ulb designed to operate at 120 vohtce .wu19ql-9w: bznlts?

  03.09: How much current flows through a 4 ohm resistor that is dissipating 36 wa (hal5sdm ,*4:k n h;1n)fx gp(nczgwdtts ofx5m akgzs(d g,lh* :1n4nc)( fwh;pnd power?

  05.21: A household iron us/0x21bznrw ched to press clothes is marked "120 volt, 600 watt.” In normal use, hc/2wrb 01zxn the current in it is

  01.05: Which of the following r)f1j39pqoro19im; twx k .e xbesistances could NOT be produced by a circuit containing only three identical 6Ω resis) qe9tm1xb 3r xfi9oj;kpwo1.tors?

  94.37: You are given three 1.0 Ω resis /o6*9cqj (ptqdwpuw .tors. Which of the following equivalent resistances CANNOT be produced using all three resistp woup qwt*d6(q9c. j/ors?

  02.06: Three resistors of different values can be connecsk37zg6;k9kw gdj( nuted together in different configurations. If all three resistors are used in a circuugs96gjwzn7dk3 k(k; it, how many different values of total resistance can be produced?

  97.35: When a single resistor is connega0e2pd2p0uhetxy8a86i ad (cted to a battery, a total 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 saptga0 x0e88a p2 di6deau2h( yme battery? Assume the internal resistance of the battery is zero.

  96.16: When two resixvd ):k l:n:w d0h6q5fqabo6vstors, having resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resistances i:6dw) ab:dx 6vflv0 qh:5n okqs correct?

  02.46: A hotplate is designed such that it hast+7fe e7dbppex-/2 y-d7ye0x fd i ;lp a resistance of 12Ω when operating at 120 volts. What is the minimum amp7 pi -2fe;yde7bdde xyl/f -tp+07ex ount 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 thr*rgcayx9z24b;rp bd6ough a 4 ohm resistor that is dissipating 36 waca*y6r9xbzb2d4p ; r gtts of power?

  01.24: An electric heater draws 13 amperes od i 0b-yfoh-a3g*d ao9f current when connected to 120 volts. If thh -ay gdo*-afi09bd 3oe 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 wouwode.02c::j d6 ck xnih-)qmild it cost to keep a 100W lightbulb lit continuoud)- cie6wo ci:xqm. dnj 0:2hksly for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant currentnb hp7 w/nuqc),x 0*mj of 4.00 A through a lightbulb results in a power of 24.0 W associapbuxq0nhjcn) ,/m *w7ted 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 zo;b( 6vrddg m+l)hs)watts in a 12vmz ld )sdh+r6go) (b;0 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 operating at the sametime?

  03.16: A 9-volt battery is connected to fourifhro+:9 pj86 pb6fct .j ax;a resistors to form a simple circuit as shown to the rig6b: xhaa. j6ipo+cf8p f;r9tj 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 conne owmg 40vtlh8 )kp:kt4cted to four resistors to form a simple circuit ask4 :0w48tt)plm hvo kg 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 ideal ammeter, a switch and three resistors are chhoigf9 i*ob h* -l**0xolp i3w35kjconnected as shown. With the switch open as shox g j*b9filho-533*oh*0 chl*owkpiiwn 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 swii5 0lg0f1r:pt2 dxg-c/ mjwrztch and three resistors are connected as jz-2i p1r0 lgfdcr0/ 5:gmtxwshown. 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 three resistors are ckzjf2gm88pu s 9 *mxvbx 48d*/zfog,gonnected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes.gxgp*v 8 fz42 gbm s,8mf*8d/kj9zou x
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 equival uvh3k*ye,:pe:st2 (ozbd sj 0ent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical r tj(oeup :k 3 ,vy*h2b:e0dzssesistance R.

  09.07: The equivalent res9hyhixc /b/pkgptqd /s,j5 - )istance of the circuit shown to the right with resistancesp/h d/,jp xk bs5hgqi)/tc-y9 $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resi;g23bohr o0nx5 84ntgg m2net9u qu*tstors connected in a combination series and parallel circuit to a voltaun*b5h8tm qex;tgn9 g 2no r 20uog4t3ge source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows no up308jk en8plfl86 five identical resistors connected in a combinatioe86 kf8j0o lpnl up83nn series and parallel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of tt 61/:b-qz s -hfjkwgnhe bulbs are identical. Which bul-q:/fkjz wh -b6gnt 1sb will be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors are conn fejo0(f r;yph+s)j*ypko28r ected as shown. With the switch open as shown in the diagram the)yo2h +j0y ; r*ke8js(pfopfr 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, aav4 .c.(k kyft switch and three resistors are connected as shown. With the switch open as shown ift kav.c k(y4.n 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, 0 9m(ib(d7cguqk t +,n uw4nrla switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.udrc lq i,(buk nng40w 9t7(m+0 amperes.
When the switch is closed, what would be the current in the circuit?