A device that produces ee2sdt2r )a2qea 0o.wh lectricity by transforming chemical energy into electrical energy ese)r.h atq2a 2 0w2dois called a

  A car battery

  The total amount of charge that passes through a wire's full cross sec)9 fl 5pb gd7yjq:eaw*tion at any point per unit of time is refe bf95)ygeldjpw7: aq*rred to as

  The direction of convention current is taken to be 4/ao0.rh;j h z/sl 9z/wrhrnk the direction that

  A coulomb per second .-nmicue/u ewdxa5) 2is the same as

  Car batteries are rated in "amp-hourwno73cyh6 i ;ds." This is a measure of their

  The resistance of a wire is dem 1ti;: ipxt2k8 5cdhgfined as

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

  The resistance of a wiruq0w73wva s cdx p u6znss;l a)rmb)1 78l+k,xe is

  The resistivity of a wire dec+w:n, (:khurfiuzrb1l a q34 pends on

  Which conducting materi zmy(6xfk*a,t al has the lowest resistivity value?

  Consider two copper wires )vlqsii6n *eeo0-s6 s. One has twice the length of the other. How do the resistivities oe svn-q*e 6i0s) 6ioslf these two wires compare?

  Consider two copper wires. One has twice the length ofq.:kmx on1wo0- qojb. lh3ok0 the other. How do the resis 3k0m1. xl.bk o j-onoq:whq0otances of these two wires compare?

  Consider two copper wires. One has twice the cross-sectional area of the ovjwbk q (vdrv1/b88*tther. Hovb8dw1q v(ktvr/j *b8w do the resistances of these two wires compare?

  Consider two copper wires. One has twice the lengtmqw 7-u 5-ksxnh and twice the cross-sectional area of the other. How do5-- snwkq xu7m the resistances of these two wires compare?

  The length of a wire ss6f0(pf t,( w4tq hv,xnft b*fed+q9is doubled and the radius is doubled. By what factor does the resistaq(xf(tt*+4tfbs,q h 9nw , pfdevs6f0 nce change?

  How much more resistance does a 1.0 cm diameter rod have compared to a 2.0 cm dtx liv -rb8x*;ww h)i-+l(s cmiameter rod of the same length and made of i-mx v-c)wtwlb*+r lis8 (xh; the same material?

  The resistivity of most commoapyhb *b,64. foxj ry3n metals

  Negative temperature coefficients of re*tzi;ibk5dmnqx b 6f .-fl+z 3sistivity

  What is 1 W equivalenki( z0 jv7e 6/f0qjcnat to?

  A kilowatt-hour is equivalent toe)/ry keu02crp:/wq q

  If the resistance in a utn6cc l1msp *.8l gyo,*u/e dconstant voltage circuit is doubled, the power dissipated *son/u.6,* 8p cmy1lgdtulc eby that circuit will

  If the voltage across a circuit of constant+mxoz1c l2e:r ldd( 0t(muid7 resistance is doubled, the power dissipated bdd7(+c uol t2rxe imd0 m1lz:(y that circuit will

  If the resistance in a circuit witzz;. lt2+:)wo:unwzzq p we9ah constant current flowing is doubled, the power diz w+2az.)e:w ot w9l;qz :zupnssipated by that circuit will

  If the current flowing through a circuit of constant resistance is doubled,hj yp/j : nf1 ad3ss-an0k86rx the power dissipated by that cirjnj81n s rha:-6ys3dka 0/fp xcuit will

  During a power demand, the voltage output is reduced by 5.p, /d vwozp2q8l.x6yw 0%. By what percentage i8px pyv wqdw oz6l,.2/s the power on a resistor affected?

  A current that is sinusoidal with respect to timhm -1/h eyud cprv)6vf/ 5fpr4e is referred to as

  Consider two copper wires each carrying a current of 3.0 A. One wire has tqmblqfvu ( 2,m6s;w8w wice the diameter of the other. The ratio of the drift vewm,s8q62uvm wqf (l;blocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the r xaq (g-ql h-deq+o b3ej1 :x2aefq6-mesistivity becomes essentially zero at very low temperatures are referred to a3h :aqx+m qojb (- g6d2fqe1q ee--xals

  What current is flowing i mb fhvr63).(k8solb jcb 6sn(f 0.67 C of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus in 2.0 min. Whtrlq5z3 jwfb:+ u+2 wjat is the averagwr+w jlq5j+z u32tb: fe current?

  How much charge must pass by a point in 10 s for the current to be 0.0ttps:o,wgzl )9 u1+gp25vcraqs8e 9w) ncq z50 A?

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

  What current is flowingujgibff;zk*25 yos ,; 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 dra +oto3 6t v7xnjn6sq6sws 13.5 A of current, has been left on for 10 min. What is the net numbt 6stno+s76 6oxvj 3qner of electrons that have passed through the coffee maker?

  In an electroplating process, it is desired tw8a 5 avivli3b2+zu9 ao deposit 40 mg of silver on a metal part by using a current of 2.0 A. Howu3a+8i2iabvw5lvz a 9 long must the current 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 difference is required to cause 4.00 A to flow through a resist.pip s(eqvp:4v21p id/xinm2ance of 33qmpp i:22/vi( n isxp.pve 4d10 W?

  What is the voltage across a 5.0-W resistor if th0eea fn+rj*xw5 3 lfd)e current through it is 5.0 A?

  A 4000-W resistor is connectedtt9a-h if:5bn across 220 V. What current will flow?

  A light bulb operating at 110 V drawslr64u wi m1g7q 1.40 A of current. What is its resistance?wmqr6gi 41ul 7

  A 12-V battery is connected to a 100-W resistor. How many electr8gxd 1 ry(tw+oons flow through the wire in8y r gdxt+(w1o
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0.40 inch? (The rq805:oofw5 +yuaebxqu/b3 vi esistivity+uw5yx5 bvi3aqbf: o o/0u8eq of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance xm6( xxnxf8wx5v 9vs; of a circular rod 1.0 cm in diameter and 45 m long, if the rwvxx( n6v s589xm; xxfesistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wiru--9:k2 qyrrs h6awk 7bz p:tue (resistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (resiw ( eijmn -w,szf0rh;s 9z8fa+stivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 m long,7eo 0eky7d 0506tkwik*xvkpnk5 ) xqo measures 0.040 ohms. What is its resistivity?

  Calculate the current through a 10.09jf5 de 7);5 cgjl.f) ojcyuab-m long 22 gauge (the radius is 0.321 mm) nichrou5o cdy jjf b);cjg7)eafl95 .me wire if it is connected 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 rectangu2wu: e,dtu2:y2qpis: zsztd ;lar cross-section, 1.0 cm x 2.0 cm. What is ptq2 u; ,s:dwzyt ui:e: 2sd2zthe voltage drop 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 0.50 mm and a resistivity of l)gdrcr8p p i17.-gtx fe;ap9 $100 \times 10^{-8} \; \Omega \cdot m$. If the wire carries a current of 0.50 A, what is the voltage across the wire?

  A 1.0-mm diameter copper wire (resistivity+mim3 lgh ap q-gbw7 mph3vv.k*x01 -r $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistancefi: 1mv 7 tz(9*cy7epd/ jawhq 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 r;r:h11b2v7olb epen cz6 n6ofesistivity 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 poizu9jc lx;odnng / ben 0.l)1s(nt of indium. The resistance of the platinum w nzb(n/noe 0gjc.)lx9;s l du1ire 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 throu,d, :ojey nbcp,44hu5po4nrx gh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What c 5/sl nod;t-eourrent will it draw?

  A 150-W light bulb running on 110 V draws how mu7ogw,rau3w fa-2 mg d:ch current?

  What is the nominal resistaj l1udmm9 i//cnce of a 100-W light bulb designed to be used in a 120-V circ/i9 ld1jm /umcuit?

  A toaster is rated 800 W at 120 V+ wj2*tqsu,f0yjd9+oij a (sr. What is the resistance of its heating elemen ifs+rjtsuyj+*9j,2a0w o( dqt?

  A 200-W resistor is ratedq3k:gl5sbe( 10k0sasv 7m0b lqhfu2n at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated at qo),b l53iq m(c xsn,m$1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what current do 6ep0q,cszayi+ sug75es it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is its res5 zu 5mkc: n-nr:1 t-jvt yu*(z-dsqmpistance?

  A 25-W soldering iron runs on 110 V. What is its resistance?wpvrh ,s3q 3b0wg81y p

  How much does it cost to operate a 25-W soldering iro 3gey; k :n.h8ps8pmqtn for 8.0 hours, if energy cossyh :; g88mn.epkpq3t ts $0.08/kWh?

  How much energy doesb91x3f olma*ct ,w pz5jv:p 9i a 100-W light bulb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much5:j:x s)9i mcxv6aqogfqv + a2vo 44ls heat energy is 2i ovx 9vq:j+o:4 xf cmslvq6asg5a4)produced?

  A battery is rated at 12 V and 160 A-h. Hwf;r+;9h. k 2jodhga now much energy does the battery store?.;d9+ar;jnokfh 2 wgh

  How much energy does a 25-W soldering iron uskc-ni 8)e 6gnge in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assumpk /zohse: j;4p9p(lfvfx7d) ing the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cks 74h9 )dzffvojpx:lpp /;(e ost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned5*khpwr n 4gk *s m3wltdt9(k- on 8.0 hours per day. If elect9k5gk3*mr(wt wnldt4k*- hps ricity costs 10 cents per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electric bill included the cnlq cenc;,li+ 2:.oba ost 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 taq+ eli2n c;n:.ocbl,he monthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element in an electric drier operates on 240 V f3 ba abj2d9+gand generates heat atdg3 9bfjaa2+b 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 will the repair have on the power dissipated in the heating element?

  14 A of current flows through6g:u q/ m;b.7rk uzfbv $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery cost -s6ja+jmfp+gig *c ;hs $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 8y4g 9yrhqywb b, a0a.60% efficiency. How much current does it draw from a 120-Vbyg., qr84w0a9ay byh line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. rrtlq +gewz iuu)7v b-50+. .kms4cysWhat rms current flows thrqr5z sku+y eu)7bw+crm.4 v- l 0sitg.ough this device?

  A 500-W device is connected to a 120-V ac power source. Wha nolej3- 4 cdxmpkg thn(-o()8 az1h-lt peak current flows through tl) - eco (tdjm goxkhpz-ln-38( 14hnahis device?

  A 500-W device is connected to a 120-V ac power source.( 6fze5qhq p0y What is the peak voltage across thip(0y6q5 zqeh fs device?

  The diameter of a copper wire is 0.081 inch. The su:*hpz 4z1izmaximum safe current it can carry (in order to prevent fire danger in building construction) is 20 A. At this current, what is th iz14uspz:hz* e drift velocity of the electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)