A device that produces electricity by transforming chemical energy into e1ripr:0r7eulr0 i ;c olectrical energy is callrpol1r;u7 r:c0e iir0ed a

  A car battery

  The total amount of cha yk,ku 0rsj.5prv6nf8 rge that passes through a wire's full cross section at any point per unk,ky .uvr 6srjfn058p it of time is referred to as

  The direction of convention current is taken to be the direction6 4n q u wpysn.lto+u2oo69z*wz .cf;d that

  A coulomb per second is thezai1ipclq 38 wl(v/:.syoye 2 same as

  Car batteries are rated inw,ih7cbho,h :zk8dn - "amp-hours." This is a measure of their

  The resistance of a wirm4-tp x63 azbaw(a uobd2po)4e is defined as

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

  The resistance of a wire +)n l te ef ld8:sgyrh5-:wdu3is

  The resistivity of a wire dfyh(d: a+gco6 epends on

  Which conducting material xetls z ,i2k ld8qg5q 10tb,4vhas the lowest resistivity value?

  Consider two copper wires. One has twice the length of the other. md56lcd 3xafzp;z4x; How do the resistivities of these two wires comparedxzld mzf;45 xp;ac63 ?

  Consider two copper wires. One has twice the length of8d9wx ); h:quvx thy6ff-c/ma the other. How do the resistances of thesefdc9vhyf/ :8 ;6xwmtahq u-)x two wires compare?

  Consider two copper wires. One has twice the cross-sectional area of the o5* dgca6 k0;j8lswx vyther. How do the resistalw50ag d6jx* y;cvsk8nces of these two wires compare?

  Consider two copper wires. One has twice the lengt mcn9mjk, 9k1x n4j)amh and twice the cross-sectional j)m9kj 1xkc,nmmn a49 area of the other. How do the resistances of these two wires compare?

  The length of a wire is doubled and the radius is doubled.rt-ekry77mi) 5qh lj- By what factor does the resistance chyt lmi7jh)-k7 5-rqer ange?

  How much more resistance does a 1.0 cm diameter rod have compared p4mua5mr-/f,gm e)a u to a 2.0 cm diameter rod of the a4m eamu p-5/m,)gurfsame length and made of the same material?

  The resistivity of most common y )d)f;pon+;/wo nwb cmetals

  Negative temperature coeffic5jg 5t a7zpn)v solg0q/n5cze.p5gi a8r9,q fients of resistivity

  What is 1 W equivale*j e-q3au47rn4qa wdint to?

  A kilowatt-hour is equivaletm(fay8q0d+ p : ,tdm7xr3g wont to

  If the resistance in a conc3god oyl /u bj56::wru7,lek stant voltage circuit is doubled, the power dissipated by that circuit wl r:7: by6ujco/,l5 wdeoku3gill

  If the voltage across a circuit of constxdq)4g+ybv4,u25clh5 ozrat q4.slkant resistance is doubled, the power dissipated by that circuitohd 2 v5x l4.y4, ql)bctaqs+u54kzgr will

  If the resistance in a circuit with constant current flowing is doubled, theo(254kzx( o veey/smx7m2wo f power dissipated by thae(4fsyxo x7/z wo2 vk25o(mm et circuit will

  If the current flowing through a circuit of constant resistawuv:gw9 j z55i+ vjt6gnce is doubled, the power dissipagv:+ gi65zjv9 t5wwujted by that circuit will

  During a power demand, the voltage outputz e2::tqgp)*nphyc (scf6u;e is reduced by 5.0%. By what percentage is the power on a resistor af;tu6qf2 (s pngec):ez:p yc*hfected?

  A current that is sinusoidal with respect to time is referred s0hd-y xv rb9*to as

  Consider two copper wires each carrying a /amr939dowzx s 4l ek9current of 3.0 A. One wire has twice the diameter smorxaw39 99ed lkz/4of 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 resistivity bec;sdur8bsikdb .l* q 5+7 e;gxfomes essentially zero at very low temperatr q+slsi7xf8d b du;e5.k*;gb ures are referred to as

  What current is flowing (8e+t:tzk vrjux 9z:a4vfzm; if 0.67 C of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplatingvd25 on2wdg)jx. ,dxj apparatus in 2.0 min. What is tdd,gd xowv 2)2j.xn j5he average current?

  How much charge must pass by a point in 10j*8a:qymi x,n 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 ifu fk)a1v b)em0l4 u8xs $4.0 \times 10^{16} \; electrons$ 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, hl*phn/ymy0swhoa, npvoti1 :9//aa 3 hr* 6haas been left on for 10 min. What is the net number of electrons that have passey:m*h69w 0a /tn,/ylr1ph a 3h haoo/pivsa*nd through the coffee maker?

  In an electroplating procem)9qvfm/+ued6 iu ekxi jf/;)ss, it is desired 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 are si fx 6;eiu/9me/)uq iv)k+f mdjngly charged, and the atomic weight of silver is 108.)

  What potential difference is required to cause 4.00 A to flow through a 2ia1ezj,b ki6resistance ,j 6eiaiz1 2bkof 330 W?

  What is the voltage acros6:y )dk9dtoqr- 1brgh s a 5.0-W resistor if the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What current will flow? n* lm6-)wefrr

  A light bulb operating at 110 V draws 1.40 A of cxoj6, 2wrjk2xq- l m*jurrent. What is its resistance? jlq2wormj x2-k ,6x*j

  A 12-V battery is connected to a 100-W resistor. How many electrons flow thr oh,*c3qp,;x6sihld roug ,qd,r* ;p cil3xh6hosh the wire in
1.0 min?

  What is the resistance of 1.0 r /5x k,r;njmm0:isqhql1a 9tw9xgp3 m copper wire of diameter 0.40 inch? (The resistivsjxqpamwir3rk0 q5,ghm 9 n:l9x;t 1/ity of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameter and 45 m long,dfzvz l ,1t7;bemis m3 843tbq if the resisti 7 b3d tzl4;b izsmefm,v1qt38vity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resistivvzaa ncofug h 5/h8-.-ity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wlufq90 bl(nf 9 p.y8r8gan +mvire (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. Wibgg/-se)f1dr *vpe/hat is its resistivity?

  Calculate the current throug qrr8o xxavj-k0(5co,qcmx0 -h a 10.0-m long 22 gauge (the radius is 0.321 mm) nichrome wire if it is connected 0m--kaqj58 rxcvox c0 ,xoq(r to a 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 rectangular cross-section, 1.0 cm ,.u+fepq jjuz2r*e,4 eh ,eba x 2.0 cm. What is the voltage drop4*b, +ejf r,phzuj,uea .2eqe along 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 of 03byiyl .8k iy8.50 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 (resistpzv56q b 3xs;aivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistanceyhr3 m4t lyjjlf 7zp98 w6/l;+zy8adq 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 coefficit 75e9wig+t8 vvqsqp/ent of 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 point of indjv,.skd*1 ;mj or s6iiium. The resistance of the plidsj1.sr k ;*ivjo m6,atinum 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 through an )*t3amuj* ojfvoa h55 $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. Whama 5-hb4wur/vntz-/jvj 7 ck4 t current will it draw?

  A 150-W light bulb running on 110 q:c 4io:-jlcrV draws how much current?

  What is the nominal resistance of a 100-W light bulbt,ksp +2er 2h;ea 2ofy designed to be used in a 120ao2h 2f,2yrp st;ee+k-V circuit?

  A toaster is rated 800 W at 120 V. What is thedh) * kqsv;*ie j+0hcoxxw6 0t resistance of its heating elementwvkxo)+s qji e0x chth;0 **6d?

  A 200-W resistor is rate j1shfhy7-k.b 0nqrk,d at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated zbfpu5* esy3l)c w-9dn7g.pmb ,k w3sat $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, wr bglz5s(2yq 2we tvus*6k3g5hat current does it draw?

  A lamp uses a 150-W bu +woi2iou)2rny nio( /;hfy1g lb. If it is used at 120 V, what is its resistance?

  A 25-W soldering iroijfgj 3;ca;xm,vyyp- )vw 9f) e .f6kjn runs on 110 V. What is its resistance?

  How much does it cost to operate a 25-W soldering ns.gc/sba0 j xi,w(4h iron for 8.0 hours, if energy costs w.(in0gascj/xh sb4, $0.08/kWh?

  How much energy does a 100-W light bulb ufy-0+o4mja( 6)/u, z(glwtsxgfd re dse in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much heafvc v+oi7otlu*t:gu+svm (1(t energy is produolgiu7 fvv tv*+(+ (s:1mc otuced?

  A battery is rated at 12 V and 160 A-h. How much ener51 qa-ji0zuhdywh0 os0 jjqkzm 6c** 3gy does the battery store?qmh5jhw1 0ak ui*j3*d sqjo0 6z0 yz-c

  How much energy does a 25-W soldering iron use inwn.m) fa8dajbh*ff z0r 06ef9 8.0 hours?

  A 100-W driveway light bulb iy3focob ,)x2sv8+1lhzj0 e yus on 10 hours per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual coscxfoh,sou l01yb) zev+y2 3j8t to operate the bulb.

  A 400-W computer (computer plus monitorcsw 3eaemn u,hc,-d o;ob0k5/ -pej:r) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, ho3, om0ds5-j-r bwh :n;pa/eo euccek ,w much does it cost to run the computer annually?

  The monthly (30 days) electric bill included the cocb 6vl4e0n;p:5 s btqvst 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 cenvn;vq54b:l60epcb s tts per kWh?

  The heating element in an electric drier operates on 240 V and generat m ao8*;alyg4 b(fg6jj a0wb(res 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 effe68ljgag rb*( m(fw;o4y aba 0jct will the repair have on the power dissipated in the heating element?

  14 A of current flows throu:s2d,omij: qr kw5rv ,gh $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costso 4xkr)uiqv5s:/zf:0zvnkot g n-/y2 $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 muchsd,qkb6 e) qeeiw1*gn ht6f :7 current does it6 dwe)b16f *k,t:q7nghq iee s draw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected t(lzfn2b )l-wh o a 120-V ac power source. What rms current flows through thf)zhwl(b- 2 lnis device?

  A 500-W device is connected to a 120-V ac power source. Wh u0p:o.mc+s-3jne(ixq 2 e yuwat peak current flows through this deviceeouj+uwx32en- cimps y.q0 (:?

  A 500-W device is connected to a 120-V ac power source. Whvql ;icy6rt8blz;y 8)n :w d+*zo2dl vat is the peak voltage across this device?d vz+v;zc)l ldo2i*y;n86:bt r8yl qw

  The diameter of a copper wire is 0.081 inchb1pf*/nfogr .. The maximum safe current it can carry (in order to prevent fire danger in building construction) is 20 A. At this current, what is the/fgf*p rn1.o b drift velocity of the electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)