A device that produces electricity by transfo- g.u:mtiv-v (jx rr7qrming chemical energy into electrical energy is called at-r:7u ( q-ixvg.jvm r

  A car battery

  The total amount of charge that passes th kus6kmpd(t z g-v3 1h+bcp,t:rough a wire's full cross section at any point per unit of time is referred t,63k- zt:k1vbdpmcs +t(g upho as

  The direction of convention current is taken to be the direct-f3b56fj*9j xrep7x*k au d gsion that

  A coulomb per second is the saeyjg1w:(v3)lj:1z. ow:x3v rf icr ajme as

  Car batteries are raot ;nd5soyu e4iz5 skq3m)+m :dbrt9: ted in "amp-hours." This is a measure of their

  The resistance of a 6p/n: fo vgw:pwire is defined as

  What is $1 \; \Omega$ equivalent to?

  The resistance of a wir w1)zdh;gki x64 /jafbe is

  The resistivity of a wire demis7cr gm(c muze0z1m- 39m ef0tx71 m0i:csmpends on

  Which conducting material has the k1b8ye z- ;* y7kwhcvelowest resistivity value?

  Consider two copper wires. Onewyfus + x9am8jao xdzh(-14o3 has twice the length of the other. How do the resistivities ofy1( +dhxj9o-u48ow3szf am xa these two wires compare?

  Consider two copper wires. One has twice the length of the other. Hocp a(4gl2xp6 ww do the r2w xcp6gpal(4 esistances of these two wires compare?

  Consider two copper wires. One has twice the cross-sect;pbnr 33pvbpe c* xq (*uy 75ar1)irvgional area of the other. How do the resistances of these two *xq) 7*arbv1cyr p(i5ub3e ngpvr p3; wires compare?

  Consider two copper wires. One has twice thezzx 6ei:b:p0v,y)iob naf*) m length and twice the cross-sectional area of the othe) nmfiib:0*, ozy:)zbev xp 6ar. How do the resistances of these two wires compare?

  The length of a wire is doubled and the radius is wux 9 0vkb j7py.5sbv4nbn)2c doubled. By what factor does thesnu7w y2k jvxn 90)b.5 bcp4bv resistance change?

  How much more resistance does a bln.cf 8xm8m kz8;i9l( td;ie 1.0 cm diameter rod have compared to a 2.0 cm diameter rod of the same length and dtlxi8k8n;f e.icz mm (l89b;made of the same material?

  The resistivity of most co : une-e.u6m:ke m6ov;pg h6mhmmon metals

  Negative temperature coehor .3- xsyj bs/1v:ukx+-g xsfficients of resistivity

  What is 1 W equivalent twut:pe7m9 h3 b,-ye dcj6g7 teo?

  A kilowatt-hour is equivalent toxb1e q.eutq-xu)h/y mdri.; .

  If the resistance in a constant voltage circuit is doubled, the pmq3an rl-2f+w+px b8iower dissipated+wi rnql+fbp m3 xa-28 by that circuit will

  If the voltage across a circuit of constant resistance is doubled, )t9pi mr6,:i7z lnq pithe power disn9i6 7im) z,rl:piq tpsipated by that circuit will

  If the resistance in a circuit with constant current flowing is doubled, t/wym16g8- xh9vntvf7ibx 9q she power dissipated by thaf1 8sxn gb76xvqm9yvt/w9 - iht circuit will

  If the current flowing through a circuit (,*5mccceekjcl e 97ddt y:/bof constant resistance is doubled, the powere l7 e5c(mjc,:c t*yd9cb/edk dissipated by that circuit will

  During a power demand, the r2mra 6fu 8gg2voltage output is reduced by 5.0%. By what percentage is t rf286gu2amrghe power on a resistor affected?

  A current that is sinusoidal /a:)a* .hevrsmwfw*q with respect to time is referred to as

  Consider two copper wires each carryingt bv9ngu6/(e5 h mxgqhosb 66. a current of 3.0 A. One wire has twice the diameter of the other. The ratio of the drift velocity in the smaller diameter wirh6uq6/obebm5.n tgsx 9 hg (6ve to that in the larger diameter wire is

  Materials in which the resistivity becomes essentiallctu *264isr lhy zero at very low temperatures ar4it*cluhs 2 6re referred to as

  What current is flowing if 0.67 C omka4 -0ke7v;pc dvk p9f charge pass a point in 0.30 s?

  A charge of 12 C passes th( 9ias:ivoc6 i,( hrqhrough an electroplating apparatus in 2.0 min. What is the average curr:qivr(c9i6 h(ha, iosent?

  How much charge must pass by a point y ialeu..b 23)t0ckx uml2to8in 10 s for the current to be 0.50 A?

  A total of $2.0 \times 10^{13} \; protons$ pass a given point in 15 s. What is the current?

  What current is flowing q vw bz1.9 :hy w*nwtnli;07k4t1pyaxif $4.0 \times 10^{16} \; electrons$ pass a point in 0.50 s?

  If $3.0 \times 10^{15} \; electrons$ flow through a section of a wire of diameter 2.0 mm in 4.0 s, what is the current in the wire?

  A coffee maker, which draws 13.5 A of current, has been left onb u)5:nu:m)-ez t qhw;gewb+z for 10 min. What is the net numeu ;qm wz)-e ntbhugz::5 b+)wber of electrons that have passed through the coffee maker?

  In an electroplating process, it is deg +m:677l2 fc umunvp e/hes+j.2wplmsired to deposit 40 mg of silver on a metal part by using a current of 2.0 A. How long must the current be allowed to run to deposit this much silver? (The silver ions/6em eu f2j wngm umvh p.7+p2+scl:7l are singly charged, and the atomic weight of silver is 108.)

  What potential difference is required to cause 4.00 A to flowdi7 6dr aa5s(dorl 8bc-2w -uhv4lcz 4+cbr+s through a resistance of 34adsa4-+8c rdhbr+z 6 7cv- diloulwr5 c2sb(30 W?

  What is the voltage across a 5.0-W resistor if thyws/l7 qispn-dr)p 78e current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What cud:m;7ktj.(idpyz t vem (zuzyy + )8m4rrent will flow?

  A light bulb operating at 110 V draws 1.40 A 07b;r:bft5 rcl m0eunof current. What is its resistance?u tf 0errclmb;:7n 05b

  A 12-V battery is connected tod 1(pvvjt4 b9g a 100-W resistor. How many electrons flow through the wire dtv (b4 vp1g9jin
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0.40 inch? (The resistivd.wyg,akx; b)ity of co;akx.gb,wy d )pper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0g .1ov+n m7khqvucifidj1* vp::-uc - cm in diameter and 45 m long, if the resistivity *ck+cj n: -d.u uo-vvi71q :hf1pvigm is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resis0 z 4kh a6qg4(cchhkh6tivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (resisti6cqi zsa2 70xelc) d7j4kmh -ivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 mrnna3m*ju) li +t 9 g5-bvde)q long, measures 0.040 ohms. What is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge (the radius is 0.35l8cruss w q2afjw.; 121 mm) nichrome wire if it is connected to a cu85r l2js qww.afs 1;12.0-V battery. (The resistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and of rgd ,m(obx :n:dectangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop alm(n:: do,bgxdong its length when it carries 4000 A? (The resistivity of copper is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichrome wire has a radius o y,ylj21ccjbge9q 2+ti5hg1nf 0.50 mm and a resistivity of $100 \times 10^{-8} \; \Omega \cdot m$. If the wire carries a current of 0.50 A, what is the voltage across the wire?

  A 1.0-mm diameter copper wire (resistivil.f -w+hjygt7( d hq2ity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor ha;1qx+gw /7kvt ehm - kdj9026oaist hos a resistance of $18 \Omega$ at a temperature of $20 ^{\circ}C$. What is its resistance at a temperature of $120 ^{\circ}C$? (The temperature coefficient of resistivity for carbon is $-5.0 \times 10^{-4} /^{\circ}C$.)

  The temperature coefficient q(a s/1 hcoc2m+s0izsq ot;6gof resistivity of platinum is $3.9 \times 10^{-3} /^{\circ}C$. If a platinum wire has a resistance of R at room temperature ($23 ^{\circ}C$), to what temperature must it be heated in order to double its resistance to 2R?

  A platinum wire is used to determine the melting poqoi 9r(*)*h l6iccbd 1dhlg .zint of indium. The resistance of the platinuzl hlcid96)d* rh1 og( ib.*cqm wire is $2.000 \; \Omega$ at $20 ^{\circ}C$ and increases to $3.072 \; \Omega$ as indium starts to melt. What is the melting point of indium? (The temperature coefficient of resistivity for platinum is $3.9 \times 10^{-3} /^{\circ}C$.)

  5.00 A is flowing thrzmy+ q;b )ur-25ewsys ough an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current will it0jp6-i0y2y g 9hb*c3s 6sdwqfk dj-lz draw?

  A 150-W light bulb running on 110 V draws how mul 4vkxr7h2vu,jucp+ id9(hm72 l y.hlch current?

  What is the nominal resnw9fr 8m9-)btvb z7fcistance of a 100-W light bulb designed to be used in a 120-V circui 9-m)z7tb9b8vf wcnrf t?

  A toaster is rated 800 W at 120 V. What is the resistance of its heating eld qkz* 3*o ;l2;ll id/u1 uvb1wz0tcpuemenzlup1c d2o/tb ud*w;kv1;*ulqz i3l0t?

  A 200-W resistor is rat,dh/mc,rjv-7w xq0z i ed at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ratedb5 h (a9b1fyho at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W buupvdts/3q(w +d v.k az9e,v ;flb. If it is used at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 ddiw2(s;/v ux 6k7:rm fh dha3V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What isysl)fj1st*t30 z h4 kazy:gf/ its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 bnn5wm(hiv64w :a i t030w oyzhours, if energy costioz(an n:t0w54wy iv 3mw0bh6s $0.08/kWh?

  How much energy does a 100-W light bulb use in 8.0 hours i h7p e.2tia9qlxr/j.?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much heat energtr-4i;w n- tdl3o2sni y is pw4n-ri -tl 3tsdn2o;iroduced?

  A battery is rated at 12 V and 160 A-h. How much energy doobq j d.xc2s8bgs,p. 1he9o.yes the battery store? cx29. d .8s eo,hb1gqjpsyb.o

  How much energy does a 25-W soh/ fhg 2-jbkk p/)d7b05zjl w6lfor g9ldering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming the power corcka9qdc :,8ompany charges 10 ceo9:qc a,d8rk cnts for each kilowatt-hour of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is p-x69dgfmjd7y- ty )wc*io: n turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much dof)69xcy-ojd:d-y 7g*pmnwt ies it cost to run the computer annually?

  The monthly (30 days) elecxghr vixe. ak +1e:l,6tric bill included the cost of running a central air-conditioning unit for 2.0 hr/day at 5000 W, and a series connection of ten 60 W light bulbs for 5.0 hr/day. How much did these items contribute to the cost of the monthl,v k xg. h+6e:laeix1ry electric bill if electricity costs 8.0 cents per kWh?

  The heating element idiae+.2c a;ug i9 ooeettyvxp.6; 07hn an electric drier operates on 240 V and generates heat at the rate of 2.1 kW. The heating element shorts out and, in repairing it, the owner shortens the Nichrome wire by 10%. (Assume the temperature is unchanged. In reality, the resistivity of the wire will depend on its temper7o ce;ge.a9v 2ptx0eta u.d6yoh+ii;ature.) What effect will the repair have on the power dissipated in the heating element?

  14 A of current flows 7z9od;vh 6v jxthrough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery cost6scmy 2)wdcu)im8h/ll-s) wq s $1.49, and will run a portable CD player for 6.0 hours. Suppose the battery supplies a current of 25 mA to the player. What is the cost of energy in dollars per kWh?

  A motor that can do work at the rate of 2.0 hp has 60% efficiency. How y3*scrhq)h-6g ;r/mof.nt hfrbl00 hmuch current does it draw from a 120-V lin h r;hoh06t/s)fm- frc3*.lbh0 qr ygne? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rms current floso7 ie; d(fk-rws toif 7; rkd-se(hrough this device?

  A 500-W device is connected to a 12f ;mvy/y07lp1a8dl lh0-V ac power source. What peak current flows8/hayyl70f;vmlld p 1 through this device?

  A 500-W device is connected to4k2ac4f h g+q9yzy/vyw:is w( a 120-V ac power source. What is the peak voltage acyfqy (v4sy2/i kza :hg4ww c+9ross this device?

  The diameter of a copper wire is 0.081 inch. The maximum safe currie tz*e27z1kuent it can carry (in order to preve e7zz2ei1*t kunt fire danger in building construction) is 20 A. At this current, what is the drift velocity of the electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)