A device that produces electricity by t *0ta qljo1 v0+cpkir(ransforming chemical energy into electrical energy is called a0vtjpq *i0ao +cl1kr (

  A car battery

  The total amount of charge that passes through 6vrd xuvz): c*a wire's full cross section at any point per unit of time iscx :zvrd*u)6 v referred to as

  The direction of convention current is taken to v)c*dj ek+e1 abe the direction that

  A coulomb per second id e* yrgk- r(e;ku.2sls the same as

  Car batteries are rated in "amp-hours." This is a meztbe*p1.ro/8 h. ugt tasure of their

  The resistance of a bui q: /lup9xy(- lis.wire is defined as

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

  The resistance of a wirepu/+a (;tbvfi fk nkz860i l/i is

  The resistivity of a wire depends ab/,o 2drb 1r1fp4tas on

  Which conducting material has the lowest resistivity va//)x hgdd9ix*dmb+pd ec b l+;lue?

  Consider two copper wires. One has twice the length of the other. How dox 34 +4pz3fmxxt-/hlz vq2nx3c hcc9s the resistivities of these two wires copxv/s93n x3tx-q4hz+z3mfc 4c lxc2hmpare?

  Consider two copper wires. One has twice the length of the otrqm2mhuc + cb8k(7;st her. How do the resistances of these two wires compare2h rt (km7uq;+bm sc8c?

  Consider two copper wires. One has twice the cross-sectional area zn/3t-l-qcu fof the other. How do the resista z-3ct/f-ulnqnces of these two wires compare?

  Consider two copper wires. One has twice the length and twice t74/ y)q3k .dz7qozj)fxh epxhhip;964skv jt he cross-sectional area of the other. How do the resistances of these two wires comp ykj ps6 39ki4q ;jzqh et7dpx)h)ov7x/.z4f hare?

  The length of a wire is doubled and the radius is doubled. B6tht .3fj.kpjz +8kvry what factor does the resistance change8hpk tvjtr.+3 fkj 6z.?

  How much more resistance does a 1.0 cm diameter rod have compa 0xh*)7.r cm1mfzexi mg+xs3xred to a 2.0 cm diameter rod of the same lengthm1z+0ief.7hmx 3r*) xx gmcxs and made of the same material?

  The resistivity of most common metalac*+uq077 bm ne n4dzbs

  Negative temperature cy nhw4y(kl:h67i -5vkh1m mu*lt vot,oefficients of resistivity

  What is 1 W equivalent z:*s v xulyq3 d 4j+xt)lzq2o8to?

  A kilowatt-hour is eb ,46+9qr*g) pgvv edy.uoa9 fhm7:m j sgjr:fquivalent to

  If the resistance in a constant voltage circuit is doubled, the power d(cuh1/skpz*) d x0jase e ;f7vissipated by cpx/1 7 ;s*esavz(khuj)fe 0 dthat circuit will

  If the voltage across a circuit of kjc*ts*lb. x4b ceg bxp4iw1; .ei-0mconstant resistance is doubled, the power dissipated by that circuit willwkg t0*.pj 4ism*c;lx1-eib4.bb c xe

  If the resistance in a circuit with constant current flowing is doiho8a q8lm 0w7ubled, the power dissipated haimw ql80o87by that circuit will

  If the current flowing through a circuit of constant resistance is doubxjkfu1. i,r/ +b aviy-6g vw7yled, the po.-v jy uf igakb x7,vyi+1w/6rwer dissipated by that circuit will

  During a power demand, the voltage output is reduced b)b6,l8q 8x dsih)*uiio0 lntvy 5.0%. By what percentage is the power on 8but l) *nvq8 oxisi6hd0)li,a resistor affected?

  A current that is sinusoidal t rh4cxugwr:0 *bt3)pwith respect to time is referred to as

  Consider two copper wires each carry.rhlb /z 1)2zwf4mafff 3ks*oing a current of 3.0 A. One wire has twice theafzhlff ozm.4krbs)2 *3 f1w / diameter of the other. The ratio of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivit6sm9 ukjv 15zry becomes essentially zero at very low temperatu6 u1smrv5k j9zres are referred to as

  What current is flowi4sa xw:rb ydsdnm1,nl ct .*,3ng if 0.67 C of charge pass a point in 0.30 s?

  A charge of 12 C passes thr7t fh+ eygazt2)p0p4r ough an electroplating apparatus in 2.0 min. What is the at gfap+y4 te 0p2)7rhzverage current?

  How much charge must pass by arnkwa u)a /pg3 zdr)xr9z7,w:2twp 6 k 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 flowing if -ilb92wqicl 4 $4.0 \times 10^{16} \; electrons$ 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-mz9 j 6sk1cqe)/wui ele:w: k draws 13.5 A of current, has been left on for 10 min. What is the net number of electrons tha:9c/jkw mu:le eqis1e)- k6zwt have passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg oc8d(mpx8h, p bod9 vg(:wv jj0f silver on a metal part by using a current of 2.0 A. How long must the current be allowed to rudp g98(oxj8,wvdh0p m(cjbv:n to deposit this much silver? (The silver ions are singly charged, and the atomic weight of silver is 108.)

  What potential difference is required to cazg4ewonl8):k.n/ wgq use 4.00 A to flow through a resistance ofzwnqkn gg):wel/4 .8o 330 W?

  What is the voltage across a 5.0-W resistor if th+y8g 9xu1vgoiz.f v7s;wqy4;;m uatc e current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What cu)p8+ji 8c c;/jqgbvjirrent will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its ey/oa2-rj8 r:qvb tx -resistance:8/jxbrvo- -et ar2yq ?

  A 12-V battery is connected to a 100-W resist osq 36 c:jmkq;,viwss:5)jrm or. How many electrons flow through the smsor3 ),w:v k: ;jcji5sqq6 mwire in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0.40 inch? (The 4 eu s68hsisq+resistivis 6esih48q+su ty of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of d55e1qyql dxmhpes xmi:22a)gy 0m49 a circular rod 1.0 cm in diameter and 45 m long, if the resils12mp i :5 gexhmyq2mx945d d0)aeqystivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resistivi -mg*p f3spy2var2h0ity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper n .igvo8q c-qxxqw (.,2iyl)u wire (resistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 m long, measures 0.040 ohms. What is itt9i *e f.m :fww(qn5lgs resistivity?

  Calculate the current through a 10.0-m lonh vc szyu*q-nk..((( y6ix:ajbdyq3 ig 22 gauge (the radius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. (The resistiv(y : inx 3z(hu s (-ikyq.a6vdjycqb*.ity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm l6u *qe efk 42kgs3cx bgs)vp8ggj (z/)ong and of rectangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop alongc sqgk) eg46/8p(sfu*x j)gz3bgk2e v 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 nichromb/oc -goed3wkc u,)t /e wire has a radius of 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 of9h:h,iqn fd q.db agy: 56o6wire (resistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a :c3q1qsm+fk,)vdw voresistance 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 of resb;qj*ni, r bi8f fd+;gistivity 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 merbl)fjs3 ya-t46 4bzw(do8t u lting point of indium. The resistance of the platinum wf a yz(4od-us4 rbwt jtl6)38bire 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 through aner:qjh0 *.-a8bhnfz i $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current wig ex17m/ 5g(o)mfnp ,em7izddll it draw?

  A 150-W light bulb ru*c3 qhrnw xmj x2es3mw+o:-0rnning on 110 V draws how much current?

  What is the nominal resistance of a 100-W light bulb designed ,hxd 9o1e0 c zphq52kfto be used in a 120-V ci21xc h9f,d0e 5hkpzq orcuit?

  A toaster is rated 800 W at 120 V. What is the resistance of its heating elamsr lwby s+b6u+0 sf.u0mn) .emenbu00s w.um lb)s. y+ famsr6+nt?

  A 200-W resistor is rate02j qmpy rrh.32gd 8t1 x/dnfbd at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ratedm8 li +.qtj3ez at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what current dokyc ,z9 o8mfnogy-*5 9cc/si2r z qrd-es it draw?

  A lamp uses a 150-W bulb. If hfbty/wgo,t6v k j 6ibbp(s.10 84cadit is used at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 Vgm;o2d- jo t/i. What is its resistance?

  How much does it cost to operate a 25-W sol *jw v2-x q(k zdexns0r7;upd4dering iron for 8.0 hours, if energy costznsqdew7;k2 -x x*r4pvu( 0djs $0.08/kWh?

  How much energy does a 100- gm7f.r jvr 1te+b9q9r6 ojyz*W light bulb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V lineww,4r6yi6b 1 dmqybc( for 2.0 hours. How much heat energy is prodm(b6r61c w d bw,iqy4yuced?

  A battery is rated at 12 V and 160 A-h. How much enep s6g0fzt5( hzrgy does the battery store?t(gzph05z fs 6

  How much energy does a 25-W soldering iron um/3 8rgn0ovokse in 8.0 hours?

  A 100-W driveway light bulb is )l ffdm/oz/,jz8gkywq. z;6v on 10 hours per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate /qg,z/zjm z) wfo6df 8v. yl;kthe annual cost to operate the bulb.

  A 400-W computer (computer 25x:z/avfp xq plus monitor) is turned on 8.0 hours per day. If electrici/xvqap 52fz :xty costs 10 cents per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electric bill in qg+snj/c5u(y qeip2* cluded 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 monthly electric bill if electricity costs 8.0 cents pe+*/p(in sjugyq5c q 2er kWh?

  The heating element in an electric drier operates on 2xl,/x *dkfbx- 40 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 temperature.) What effect x,ldk*xfb x/ -will the repair have on the power dissipated in the heating element?

  14 A of current flow.le(y ybd-83bnph z si6v .pf7s through $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs j 1bnx-v 4nm0q$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% efn bfo pp7gixl c8.k7*3ficiency. How much current does it dra7ifb*p ckp 37lo n8xg.w from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is con:x,y mq6-hg,,97osy:x9cq pbqesjdu nected to a 120-V ac power source. What rms current flows through this :-yoq7 6c,du xep,, sh:9b9qy mxgsqjdevice?

  A 500-W device is connected to a 120-V ac power sourc jb8u 2ige8ma+i1lrj3 e. What peak current flows through jj l8a83ei+g umrbi21this device?

  A 500-W device is connected to a 120-(b:k3 mwcjxxku pxzxl4.lc)3hgl+ sd4( u- *xV ac power source. What is the peak voltage across this devicegd)x xhkm x*wxcbl4lc.z3lx4k :(uj(3spu- + ?

  The diameter of a copper wire is 0.081 inch. The maximuk5k4a 9lvw,falbw8 /h q73zjbm safe current it can carry (in order to prevent 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 o8,bla35v9 hwkz4 lka7 j bqf/wf copper is $8.5 \times 10^{22}$.)