A device that produces electriciwg*;3e lx7f51jr 7 z/ xlacaunty by transforming chemical energy into electrical energy is callcjxw x3 u7/aznlar; f5g1 7e*led a

  A car battery

  The total amount of charge thxd5cfn+w. :ngat passes through a wire's full cross section at any point per un:cn + n.dgwxf5it of time is referred to as

  The direction of convention current is taken toha, mc3ror6ekvxqj*cw; d( ;e:nd5 +n be the direction that

  A coulomb per second is tbsvws -;h +2bwhe same as

  Car batteries are rated in "amp-hours." This is a measure f*-osrz6 3xqw of their

  The resistance of a wire is defined a wqd 7td4m8u2a6 9h0m/ txco(5 zrfjans

  What is $1\mathrm{\Omega }$ equivalent to?

  The resistance of a wir5 j0e d5ywp0ene is

  The resistivity of a(ok-b0 9b xdu+nyn/ tp wire depends on

  Which conducting material has the lowest resistryutd0ooe9;y a9wo9ip 8am ww gl4q, o29(t/fivity value?

  Consider two copper wires. One has twice the length of the other. Ho0 fqgw,w9)stsqko ( 8ow do the resistivities of these tso skf,gt w8wqq)o90( wo wires compare?

  Consider two copper wires. One has twice the length of the ot26;d - o,7zp wrbxeagwf;0np rher. How do the resistances o6ro -w,fz2 0aedrgwpx;bn ;p7 f these two wires compare?

  Consider two copper wire7xitdq 9.sekjp (* .t7eibw ;fs. One has twice the cross-sectional area of the other. How do the resistances oj;7(s fkd7eiq.t.wex9 ibt* pf these two wires compare?

  Consider two copper wires. One has twice the length and twice the cross-se ff;(3gcf h ) 25tmvejra;/jgictional area of the other. How do the resistances of these two wires com; /f5mj vgr3)ffai2 h;tjegc(pare?

  The length of a wire is doub 8qf18(edyaqvihk a(( e6b/on8vh 9bcled and the radius is doubled. By what factor does the resistanc88(fibaqch89e yv1 doh6(nk/vq b(ae e change?

  How much more resistance does a 1.0 cm diameter rod have compxn0x*-w oagnw +(bx qft6j;5uared to a 2.0 cm diameter rod of the samex+5fnq0 g -;wjx (ta6uxnw*bo length and made of the same material?

  The resistivity of most common meo(loz4xj b) 3.fidp8 8,ttss:9a l+h dv ichk*tals

  Negative temperature coefficients of resistivityrl.a nc29zv(f:jl 0zp

  What is 1 W equivalent to/agyn9q*v(4ddourewk wr77w *qw8 6u?

  A kilowatt-hour is equiqn,1vx+:u fnxvalent to

  If the resistance in a constant voltage circuit is doubled, the0rx mp *ua(en2b2g.u mo,cz/s power dissipated by tr pu. n(mag2zo/xmb 0*uc ,se2hat circuit will

  If the voltage across a circuit of constant resistance is doubled, the power di(cy wisvgi5 q/e9n,uoot6 t3ik /k;0b ssipated by that circut9oi(gk5/ bqt ywev; ni i0u,36/sokcit will

  If the resistance in a circuit wit f mb8 8gnwmd2hu(n(v)h constant current flowing is doubled, the power dissipated by that circuit 8dwm(g2 () 8bhn mfnvuwill

  If the current flowing through a circuit of2n v-n0rt-k ch v7a-qo constant resistance is doubled, the power dissipated by th-ahr o v-c-kt70nv2nqat circuit will

  During a power demand, the voltage ou;m 4qiys38 rbm0(spz xtput is reduced by 5.0%. By what percentage is the power on a resistor affec r;bi8 34mxyz0s (sqmpted?

  A current that is sinusoidal with res p 4s2wh;l7gspldd*3+2ak dqopect to time is referred to as

  Consider two copper wires each cab)hpltn2cq+x*xl hf4 05 w pv8rrying 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 wire to that in thexc*lhv8)ppn fh5wqb02x t4 l+ larger diameter wire is

  Materials in which the resistivity becomes essentially ze3vzn 04znx q0bro at very low temperaturz0xq3v0b 4znnes are referred to as

  What current is flowing if 0.67 C of charge pass a pbdlx ;: a*ec a98.tq4kbp4drpoint in 0.30 s?

  A charge of 12 C passes through an electr.nvyf) *gihl6 oplating apparatus in 2.0 min. What is the average currhl 6)y.gvi nf*ent?

  How much charge must 0 vh 97hn hk7tjr1c.wcpass by a point in 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 flowmw3s9e gg: bhxd39 r9hing if $4.0\times {10}^{16}electrons$ 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 on)v y 38yy(ltef:fr;fb 8wd)qh for 10 min. What is the net number of electrons that havvf)blyw h:8)qf; d8t3e yr(yf e passed through the coffee maker?

  In an electroplating process, it is desired to deposith4 qx- )fv7 mqpuoca/1 40 mg of silver on a metal part by using a current of 2.0 A. How long must the currentqoq7 c/ uv)hxa14 mfp- be allowed to run to deposit this much silver? (The silver ions are singly charged, and the atomic weight of silver is 108.)

  What potential differen//xqf f10p*k*5r snbth2g 6m2zrgjynce is required to cause 4.00 A to flow through a resistance of 3 k6/2 mq n 2g **fnpr0t/xg1yz5jbhrfs30 W?

  What is the voltage across a 5.0-W resistor if v;. he(orq3w0b*tarh the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What current will floymt-aks4c6v9 w?

  A light bulb operating at 110 V dra +(spyqz:,tay8+kf0*m usi tk+- m jgews 1.40 A of current. What is its resistance?, k*yzuas0 gft mq8+ iysp(- m+k+:jte

  A 12-V battery is con9g tb-0uy z-gf-mykc/nected to a 100-W resistor. How many electrons flow through the b0- /t gzygcf-y9kum -wire in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0.40 inch? (Theljw8)ouy;4 h z6lqa: b resistivity byzh jq64 :)ol;w8aulof copper is $1.68\times {10}^{-8}\mathrm{\Omega }\cdot m$.)

  What is the resistance of a circular rod 1.2ch orb8u k30r0 cm in diameter and 45 m long, if the resck hrr8u23 o0bistivity is $1.4\times {10}^{-8}\mathrm{\Omega }\cdot m$?

  What length of copper wire (resistivity cm urr0oz07 kh :2.swz$1.68\times {10}^{-8}\mathrm{\Omega }\cdot m$) of diameter 0.15 mm is needed for a total resistance of $15\mathrm{\Omega }$?

  A 120-m long copper wire (resi)z l1 /p-urhltstivity $1.68\times {10}^{-8}\mathrm{\Omega }\cdot m$) has resistance $6.0\mathrm{\Omega }$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 m long, measures 0.0s hl0)cnn6ld (40 ohms. What is its resistivity?

  Calculate the current through a 10.0-m long 22 gjs-x8vn cwh d(t d97k6auge (the radius is 0.321 mm) nichrome wire if it is connected to a 12.0-V batterycx-96knjvhd d87 w(st. (The resistivity of nichrome is $100\times {10}^{-8}\mathrm{\Omega }\cdot m$.)

  A heavy bus bar is 20 cm long and of rectangular crosjo6,skq 0 nf4ks-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carri0, kq6fo4 knsjes 4000 A? (The resistivity of copper is $1.68\times {10}^{-8}\mathrm{\Omega }\cdot m$)

  A 1.0-m length of nichrome wire has a radius of 0.50 mmc p hvo0)o4zj9 and a resistivity of $100\times {10}^{-8}\mathrm{\Omega }\cdot m$. If the wire carries a current of 0.50 A, what is the voltage across the wire?

  A 1.0-mm diameter copper wire (resistivitrw9 f1c5e u0msy $1.68\times {10}^{-8}\mathrm{\Omega }\cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resi 2ig) cevsr ef2vu*+3gstance of $18\mathrm{\Omega }$ 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 of resistivity of pla zr h6.3z5mc:lnurjmb :s 1e1etinum 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 point of indgzn5(2w.q b fdx3 kyv9ium. The resistance of the platinum wirezq9gn2xyfd v(53w k .b is $2.000\mathrm{\Omega }$ at ${20}^{\circ }C$ and increases to $3.072\mathrm{\Omega }$ 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 througixs5z zhx-/3vf e:a :wh an $10.0\mathrm{\Omega }$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 0x+4 ztm aehc/8u vkg;rm5yx41200 W. What current will it draw?

  A 150-W light bulb running on 110 V draw9i5dnt37d irur qn6v--z pc 1es how much current?

  What is the nominal resistance of a 100-W light bulb designed toej 73m*6majd k be used in a 120-V circui 7m*jm 3dkj6aet?

  A toaster is rated 800 W at 120 V. What is.brz8c q /pu13 ug:uuj the resistance of its heating elemenjg1ur3u:cpz b u8u.q/ t?

  A 200-W resistor is ratee + lxmfa8dspk)h6.*jjm p(0od at $1/4\mathrm{\Omega }$. What is the maximum current it can draw?

  A 200-W resistor is rat -u)z,a/emcym ed at $1/4\mathrm{\Omega }$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If ikc s2msm)g/g 7gu)t3lt is used at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is its resistance/h3nsis tn2s1 ?

  A 25-W soldering iron runs-g.1 2e 6p)zeafv1l gejv v3yx on 110 V. What is its resistance?

  How much does it cost to operate a 25-W solderin4 8ffcci4vr uz/ye9*eg iron for 8.0 hours, if energy costs*zuce/fvfri 4yc9 e48 $0.08/kWh?

  How much energy does a 100c.*ptqjd a.3mpjk3 y/-W light bulb use in 8.0 hours?

  A 1500-W heater is connected to yxk 6f(4c 8zexa 120-V line for 2.0 hours. How much heat energxyx6 8ezf(4kc y is produced?

  A battery is rated at 12 V and 160 A-h. How much y0n wvs3dx *rh cd38dkac92)lb*0lny energy does the battery store?xl3 y29*ys0hr8v cd )dckn*0nlw3bda

  How much energy does a 25-W solderingis 3t8ix7ja gm.+. grg iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours pehpxs ,m1bik4+v-:nsl r day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate the bulbn4i- ph 1v+s ,mlbxsk:.

  A 400-W computer (computer plus monitor) is turned on 8.0 hour.j v1k ne-upyv8-1ne fs per day. If electricity costs 10 cvue-y -1nk fe1v8pj .nents per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electric bill included the cost o uv3bb,ti16 cogx d-zm5 tf)0sf 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 muchdt5 1ftm6cx 0ubzo ,g-i)3vbs did these items contribute to the cost of the monthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element in an electric drier operates on 240 V aj(*:ycua4u; s 8uwr eind generates heat at the rate of 2.1 kW. iu*4;sa(: eu 8wrc yujThe 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 temperature.) What effect will the repair have on the power dissipated in the heating element?

  14 A of current flows thr wno.)m36ems 8 fbr4j6ppv+ mwough $8.0\mathrm{\Omega }$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs x(y(axv)h-wtvf;g w6 0 j*gpo $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(/x3 tbpend h4s4s2i j much current does it draw from a 120-V li t44/s3nsji2 b(hpxde ne? ($1hp=746W$)

  A 500-W device is connected to a 120-V ac pon sgp :rj:(wzpnb/k36wer source. What rms current flows through this devi:wnnr p6 /b3kzs:jpg (ce?

  A 500-W device is conne*of65.eaek vkcted to a 120-V ac power source. What peak current flows through this ov kee*a65.fk device?

  A 500-W device is connected to a 120-V ac n d.0hkgygdssk 1rsiv;a,* 34power source. What is the peak voltage acr igr 30vya1.4sghksdn,k; sd*oss this device?

  The diameter of a copper wire is 0.081 inch. The maximum safe current it can caxsd5u .ri l8cr5c3 ha-rry (in order to prevent fire danger in building construction) is 20 A. At this current, what d irhl.a c5x3 s5cu8-ris the drift velocity of the electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5\times {10}^{22}$.)