16.09: In the circuit shown, an electric current t.fg (w i;m+/ajhcxcxw64 fj+exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flow through the resa+f4.cmtw;gj fxi(h wj+ 6/xcistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are connected ineqqx( 4vw1bz*8 bnr 6w parallel, the_________each resistor is th qzb*6vb4wr 81 qw(nxee same.

  06.33: A current through the thin filament wire of a lightbulb causes g)sy*-p wavaa0s*-8 q5zeel a the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens b*8vsq-g5aae*e) p -0wals a zyecause

  13.08: Some standard household lightstwv/jhk;- 1s 6mm lpn)ro6g/g are being replaced with LEDs. LED is the acronym for which one of therlk/ ng;po jt 1mgh-6 mv)/6ws following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional are6b./;e*zvuy 3qcyvt/ dhr z-g a A. It is to be placed into a circuit, but it first must be cut in half so that the nee/3-.tr;bhv*zc y d u6q/vzygw 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 lmag 9p.:x*0h 4s69sexcwcr e made of the same material. Wire II has twice the di 0ac: psm*9weeghcs4 xlrx. 69ameter and twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material x + iedk0.h6mtbut has twice the diameter and half the length of wire X. If wx+e hk ti.dm06ire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This piece of m4a9w-uraztf :k8oi 9xaterial is then drawn so that it is a cylinder with new length 2L. What happens xrw9fiuaza o -8t94 :kto the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He d8c :x-jlnc4/o nix.av ge hy9*ecides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at a gi -/ nox jv8enlyx :c.ahgc*i94ven voltage?

  16.07: Three cylindrical resistors are made of the same materi8gs6kf0jz /r eal. The length and radius of each resistj06rzgsfk8/ eor 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-43gt v0bicyh/dw: tc battery in the following way: “Two resistors are connected in wc b3dv0-:g/tih c ty4series. 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 the accompanyingx37xe ;aj6a ro x7mu :pn+ghn( circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohux +a(n7oxae 73rhp j;ngx 6m:m. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compbyjg*:4;j m26erje 3jnygc cm d ;kxk* srq;/*ound circuit shown to the right. The three bulbs 1, 2, and 3 - represented as6/xdq 4;j gjk;cgc:nb*m sryeem; 2**jjr 3ky resistors 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 right. If the current in a41vrbc6rw ew(lxk o - 3lbh.6pll three resistors v6rh6bkc 1wbx(we3r l4lpo -.is equal, which of the following statements must be true?

  99.37: The diagram at right re, g.pyt 3 qvhf9o(7ra0v9r y*qsmu3typresents a simple electric circuit composed of 5 iden7uyy 39ph*f9rst ay,oqr 3qgvm. (v0ttical light bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT truegvn/np6 geeb p/)7s)8 i jqm(nw,8yxl concerning the simple circuit shown where resistors R1, R2 and R3 are have equal ng8xvnl/qi,pwy)em pge b ) 8 js6n7/(resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. d a)4gac8*zmommxc, 5Bulb X is brightm c5gozd4m*a),8mc axer 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 observed?

  06.34: How many coulombqd9qx 1:0)xwe d+va2van5qi ms will pass through the identified resistor in 5 sec1n5d 0 mqw+xa i9qedv: )qvax2onds once the circuit was closed?

  00.23: If all of the resistors in the following simple circuit hao urho+ , k 7q5ompt6)g7qwz*pzvh-- ave the same resistance, which would drpht7m- q)+zq 7o-vhk g*,u6owo5p zaissipate the greatest power?

  98.34: In the accompanying c 16yofgit.r,zz bkx. 9 9syj:gircuit diagram, the current through the 6.0 Ω resistor is 1.0 A. What is the power suppl:1x ,z.gt9.oyjgs 9rkf yb6ziy voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a bap(-co/v c, l3udfugi+ ttery. 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+ivugp3/(lfoc- u c,d the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 ard(eli9 .;1s+ayz8 cbgoac 7sk e connected in parallel to a battersgiaoy.sekb l9 ; a(czc7 d1+8y. Suppose R1 has 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 volt0747vodf1m3bn rcvw ns. What is the maximum val v 10d cv7omnrw37bfn4ue of the current under these conditions?

  99.23: What is the resistance of a 60 watt z*((mo +vpxqs lightbulb designed to operate at 120 vo(mxq+z (o svp*lts?

  03.09: How much current flows through a 4 ohm resistor that is dissipanz( ts,. qdi s3(ufz8cl.v yg:ting 36 watt 8gsl. (,(qc vnz3udysi f:z.ts of power?

  05.21: A household iron used to press clothes l5o8 0zc+djimzwr0z 3is marked "120 volt, 600 watt.” In no+cioz 8rdlm5 wjz00z3rmal use, the current in it is

  01.05: Which of the following resistances could NOtlpwwwd 9ucp.i, ),) )yqcza1T be produced by a circuit containing only three identical 6Ω c9l),wt .y 1ua zpiwc,pd))w q resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following equivalent -48vt6cj/i5u p: xz7ia lgr7-atxnx:gl cb j1resistances CANNOT be lc67bg4xg:7c :5x 1-irvx zt tn ul/apjij 8a-produced using all three resistors?

  02.06: Three resistors of different values can be connected together in diffe .;zg vx7jya*. e0onjgrent configurations. If all three resistors are used in a circuit, how many different values of totax;y jvje.ggz.07 on*a l resistance can be produced?

  97.35: When a single resistor is connected to a battery.*n-dgap 4)wswuu:k-j)h7i qh mnk) d, a total power P is dissipated in the circ *u4 .dh:-wh-spki nkua7j )q)dn)w gmuit. 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, are 4b.x aqfnpa/3 connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resistances is corrnbaaqxfp/ 34 .ect?

  02.46: A hotplate is designed such that it1ijsl3oet0 :vm7r34-em w wlx has a resistance of 12Ω when operating at 120 volts. What is the mine 4ww3o31rtxe vmil: sm j07-limum 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 thrhgbx hs 26 79mubmfo:0ough a 4 ohm resistor that is dissipating 36 watt7:m6 bhu bfg h0mxos92s of power?

  01.24: An electric heater draws 13 amperes of current when connected t5sx.p4u mdx 5fo 120 volts. If the price of electru4 5x5 sx.dfmpicity 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 lightbulb lit con pkgkqxr k2sr*-2duea )96ik( tinuouslyr6ukx igs-a2p rkd2)k9eq(*k for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 9uvp2yng beis/z8ut4684k 6s rg ;gemA through a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following choices best represents the resistance of the lightbutn 4b6/eeyk;sg g2i8sg4rv u869pz umlb?

  01.10: Each member of a family of six owns a comx2a/wf2bom0 ww( a(no puter rated at 500 watts in a 120 V circuit. If all computers x/aof(n0w obw22(awm 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 four resistors to form a simp**x9 b u2 2kucmaac9qm e1ivk6le circuit as show 991**6kicvqek2x2 umamba cun to 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 battp s(/l87g5(ltlp brv3 p-etkdery is connected to four resistors to form a simple circuit as shown to the rlpgl3tsbkv d/l e(7 p5t8pr- (ight.
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;jg7 k k hqxxv,up4p t3wf:p39 connected as shown.:h,ppwpkxt4q v3;ux f9k jg37 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 ammeter, a switch anh4 r5s vaw3m-i/6 olf*eaud 2dd three resistors are connected as shown. With the switch open as shown in the diad4 d-2 irahv6s5 o/*wl faum3egram 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 ide9 mn.i );*q) 0bcvpbl)aa0q napl:jgzal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.all0*) 0a n9) zqp:.;cbviabqpgn) mj0 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 resistance? 7w,xuhx 5myx* Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance yu* 7 mx5xh,wxR.

  09.07: The equivalent resistance of the circuit shown di v3,mssj7f sg5/t0t2c .a uwto the right with resis0i 3 jdas2tm5./c7w uvstfgs,tances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five is, 9ymhs-mp. vdentical resistors connected in a combination serievp. mhm9s,s-y s 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 conne2xfd: ,ixk,z17gbr ;gyd0z drcted in a combination seriekby;g 0r x ,2,7d diz:rgzxdf1s 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 the bulbs a,5ak9y3 nwz x4vqsl6n re identical. Which bulb will be the bri46 zlnan3vk xswqy95 ,ghtest?

  02.21: An ideal battery9vss u20b0:ji +ilrrx , an ideal ammeter, a switch and three resistors are conneb0+isuxjvslr2 9 r0i :cted 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 ammeter, a switch and three resistors are cxele3 cd)f)s/d5( skvonnected as shown. With )3/v5sfld )ekdcsex(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, wp 5*de k0bbf4an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown inw045db fb kpe* the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?