16.09: In the circuit shown, an electric current exists in the metmf19qitpbpggm i s 85q92:lb :lm gc-9al 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 electric field through the interior of the resistor? m5 q-2pic9fmgq9b g8: m t:gl9blp is1

  98.06: When any four resistors are connected in parallel, the_w/ycsm:* a)ex ________each resistoe /)c:sma xw*yr is the same.

  06.33: A current through the thin filament wire of m+ ct /pnucq t()nyggs3872ab la52uf a lightbulb causes the filament to become white hot, while +may)qp gl7f nbc2c (85t/t2s guu na3the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights ar x 8jtq hzhq)jw4wm.,4e being replaced with LEDs. LED is the acronym for which one of thejwq,q44x.jm hw 8thz) following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional ;0 nn 3hvtzpe0area A. It is to be placed into a circuit, but3 ;ptzn0nhev0 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 II has twice the dfrl+ lk loj-6zur-js, e)w*r; iameter and twice the length of I. If I has resistlz rlke* wuor,-6)jlf+ ;rs-jance R, II has resistance

  99.31: Wire Y is made of the sa rzo5248o rbudme material but has twice the diameter and half the len 4u5o2r 8dozrbgth of wire X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and fdb0n8 s1.xc xradius r. This piece of material is then drawn so that it is as bxdcx81.fn 0 cylinder with 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 bui)kaf s0:*pp 1p 3yypghvl (+vlb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb prohp)plfppgy3s+ 1(:v0i a* vk yduce more light at a given voltage?

  16.07: Three cylindrical resistorsp/ c9,pdrnu4cbh9r-8nz-e f .+fu hoj are made of the same material. The length and radius of each resistn8 9bo,c p.u- f- /uhejd r4z+p9frhncor 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 inv8j.v8m ia .nlp1hs5 t the following way: “Two resistors are connected in.8apn il svvht15j .8m 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 the accompanying circuit diagram has internal resistancexc g3o*v-z:nhl +z4vl 10.0 kW and the ammeter has internal resistance 25.0 o*g +:vn-3zohx4lczl vhm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown t.yc e 9,t+eldto the right. The three bulbs 1, 2, and 3 - repr d,. teey+clt9esented as 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 atx0-ll 3quukhc a7cv)ois,;8jn :yjm / the right. If the current in all three resistors is evo0-,ms jaxu k3lq hj8u)/7 ciy: l;ncqual, which of the following statements must be true?

  99.37: The diagram at riz qgc6yvnty99 29zunf6 qq6/gght represents a simple electric circuit composed of 5 identical light nz62ft9nu 9z/c66 q9qgqg vyy bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following stataw1 (7ruxe:la ements is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have equal lxer71:uaw (a resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X is brigsa0n2u;yunb ri 1h)0ghter 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 t2 0u;unn) bgsrh1iy0ahe following choices best represents what is observed?

  06.34: How many coulombs will pass s. or 7(mrv3cvthrough the identified resistor in 5 seconds once the circuit was clos7 v(rvorsm3.ced?

  00.23: If all of the resistors in the followin;la4xu,2mov 1 pmr p0ng simple circuit have the same resistance, which would dissipate th2om ;a,rx1ump p 0nlv4e greatest power?

  98.34: In the accompanying circuit diagram, the current thp(a;o)cm 6 iula:ubm6rough the 6.0 Ω resistor is 1.i la(6baumc;omu :p6) 0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battery.tj6j od -qr(wka*d;pw qde1od 5bj918 Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.0 -;opqa oe(wjrwbt5j1qd69*1d8 kjd dW of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 ; y 5ambv8c hk*w3wd..ttsm u1are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and 5v3 u c*;wkatdm18 tm.hw.syb R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. Whatqg)d(qg bcl7m;ewx m ,)+cog * ml/ip, is the maximum value of the current under these conditionq, g c) /p,o(egg)ldcmi x+mlqb7mw;*s?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate ag w-h*wwy npki(2 hl k(4g6a7ut 120 voll2( kwhp4(7 y- awhign*wgk6uts?

  03.09: How much current : g*lq)w e,jwn2f1aqvb8u/k(kmt/hoflows through a 4 ohm resistor that is dissipating 36 watts of powe :go*8qkwv,f( jnm/1we l/buaht)q2kr?

  05.21: A household iron used to press clothes is marked "120 volt, 1rtodn jh5k8 /hu *0z+ctv0a g600 watt.” In normal use, hna5j/r+ o1v00d8gtu ch*tzk the current in it is

  01.05: Which of the following resistances could NOT be p :nv x3hvta b2;kw/y)1vrcow7roduced by a circuit containing only three identical 6 3yr/7wwovc: )v;x bknt2h1vaΩ resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following equiva42k7ejjy(jazn / v w 5crow.j2lent resistances CANNOT be produced using all thy (7r2ncjke25j/avw.w4 jjzo ree resistors?

  02.06: Three resistors of different values kv((5;/i yyaehb4ial can be connected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistance can be produce i;y5vi4k(/(lbaa he yd?

  97.35: When a single resistor is connected to a battery, a totz s0uqh.hf:x0f 69kn sal power P is dissipated inqx0s.k0s 9 zfnu6:hh f 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,s3g7hl . rtpq/ having resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Wh.7 t/gshpr q3lich of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω r8zkfjz-wz6.y tk 8oswa d7 1,when operating at 120 volts. What is the minimum amount of time z.7dw -rjko6zzwas t f8y1,k 8that it would take to warm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows througqnnb- jk* uuv088uaj ;z; prulrnffz9 8w)6:th a 4 ohm resistor that is dissipating 36 watts of power;* j8vun8utn u0) j z-rzq 9fp:n;l6wfu 8abkr?

  01.24: An electric heaterpaomwki.sxe7u 1 w p-o 4gz0:/ draws 13 amperes of current when connected to 120 volts. If the price of electricity 1z w/ ioasw .p0 gkem4-xu7o:pis $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 continzmjkk0t:,-d /3hi ndt0qu, acuously fod/z khcjk,una3t ,idm0q:0 -t r 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.0 ;8zc(bktff3n -l -ofv0 A through a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following choice- l(f-8kftvb;zfcn 3os best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computdp*6 qowvm /g:enza 6,er rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, wha*wo 6 /peazn,vdg:q6mt 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 simple circu )r obehg-*ap2d7f k5git b5*ef7rg d)ap- hgk2oas shown 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 battery is connected to four resistors to form*eiyd+ m7+jf n a simple circuit as shown to tmd+7 e yn+fij*he 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,ph-i0 q hgjc4jsnx5 ) are connected as shown. With the switch open as shown in the diagram the ammeter reads pxjgs n ,j054hhc)q-i2.0 amperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, an idevmv* s 1u *g;d*wi2jcmal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 am **c;gm2vdws j*ui1vmperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, 6gjbemu( /*hcb l 0jvi4z7 p8san ideal ammeter, a switch and three resistors are connected as shown. With the switchvb8m/40 6(jiuzjg *sbepc l7h 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?

  12.14: For the circuit shown tos0 nw)2yfsd79 ycwwdyap :. 2j the right, what is the equivalent resistance? Assum7jcw29yd)y n ywf.pasds:w2 0e that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to x5*onxd7hg 9hz )hku :the right with resistancx ud7gn*:)9 o5xhzk hhes $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five ide o2jj;gc:ap0 entical resistors connected in a combination series and p :p;oec2j0 agjarallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connected in a combis ;u3t:bqiq27js1j nqnation series and parallel circuit to a voltage sous2 jtibn37qq1; : jsqurce.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagraoaax-rdb6 5/ km, all of the bulbs are identical. Which bulb willb/xa kd5ro 6-a be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors7u0ko geju8b-x+x -6 ro -j5,bkc caxs are connected as shown. With the switch open as shown in the diagram the ammeter rea-6r0 xj +5oxxbu7-cc8 j-eouak,k sbgds 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 azol* zyy5.k4qm be :uo27 rb6kre connected as sb. 2o5ye4k7kolm6: zyqzr ub*hown. 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, afaq f, 9l dz97w8weo3f switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter ref dl9f79,e8w 3qw azfoads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?