A device that produces electricity by dfks3:v so5.ptransforming chemical energy into electrical energy is cas5fp d3s:ovk. lled a

  A car battery

  The total amount of charge that passes through a wire's gqa;-p-z oso2 ..:bpjr*zk7 d0ypahqfull cross section at any point per unit of time iboz;k:pa 0.gqaq *72poy- drh zj.s -ps referred to as

  The direction of convention current is taken toa .,ogydgdp5 7 be the direction that

  A coulomb per second is the samev ride g)va/0q;)vpk, as

  Car batteries are rated 6d+,gihith-fyhbf(z u*r3m 5in "amp-hours." This is a measure of their

  The resistance of a wb1*bggv. (a *3lt3e cnys tfa(;o3rnmy t6i9n ire is defined as

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

  The resistance of a (s :/k.+prkzo b kni8hwire is

  The resistivity of a wire d ::f cx49d yimw;g7zoiepends on

  Which conducting material4h:m7qwx0ubr e)f 6c p has the lowest resistivity value?

  Consider two copper wengu6l+29eeo*n5c53 r:4 dbspmw3 qm s1gdwa ires. One has twice the length of the other. How do the resistivities of these two wires comdl2 na mdqero335wm1 4es*ew5n su+g6c:g9pb pare?

  Consider two copper wires. One has twice the length of the other. ww6rpt8 ; w*/ 41hpm :uutyu*mhih1yr How do the resistances of these two wires compa wr ; /t*yh84uw1mwu:t6rhup y1ih*p mre?

  Consider two copper wires. One has twice the cross-sectionall6o;l/ m .wgkicanlsd ps1/-- area of the other. How do the resistan dp.ncs1i s-k-l;g/aml6lwo / ces of these two wires compare?

  Consider two copper wires. One has twice the length and twice the ceftn63rpkk2sx (zj0z:h(2 5 rfnzi: kross-sectional area of the other. How do the resistances of these two wires compareh3 fspk k:5xfz(2r26nzi0r jzkte(: n?

  The length of a wire is doubled and the radius is doubled. By what fact8mnfc96vt7n t v 8ou0cor does the resistancecvv7 0tmn88 c9tun of6 change?

  How much more resistanca6dxplm 3gl 3/o ,g7ofe does a 1.0 cm diameter rod have compared to a 2.0 cm diameter rod of the same 6/gdgf,p7oa mlox33llength and made of the same material?

  The resistivity of moslqp*o9 5-on0k 6 lqlua;hjg2ki).zaf t common metals

  Negative temperature coefficients of resistj1;kqljp i-(aah5w *u 4ul 5frivity

  What is 1 W equivalentl:k n723afo3a(3rt cj +tlcbs36 qurk to?

  A kilowatt-hour is equivalent tt w5kdqaq pnhmc *,0crta gc1n 65-h06o

  If the resistance in a constant voltage circuit is doubled, the power dissipatedra5vu/;a k0ksiw y )d+rus vw0a+ y;k/ )a5idk by that circuit will

  If the voltage across a circuit of constantr5fs aix0untexgslsf1,; itd :b0091 resistance is doubled, the power dissipated bt b1d0ne,l s1gru ;:ia t0i5f09xxfssy that circuit will

  If the resistance in a circuit with constant curremv7k; mvr o--tqyj* 72t a;ttbnt flowing is doubled, the power dissipat*-qka tvt;b7- tj y;mv2mt 7roed by that circuit will

  If the current flowing through a circuit of constant resistance is doubokeb3b6/m ;u5n(e m hsled, the power dissipated bybo6en3s;u m /hem 5(bk that circuit will

  During a power demand, the 76jum+yxw ffcou-9t/i*ta9s voltage output is reduced by 5.0%. By what percentage is t fu*muyjt9t ixf9s -oc a/67+whe power on a resistor affected?

  A current that is sinusoidga6km.8s98wh z5yg ffal with respect to time is referred to as

  Consider two copper wires each carrying a current of 3.0 A. One d qir4( z4bu ap(d(*oxwire has twice the diameter of the other. The ratio of the drift velocity in the smaller diameter wire to t dopz( *ibdq4ra(u( 4xhat in the larger diameter wire is

  Materials in which the recp9*vf*unpar 9;7njuv4 7a f esistivity becomes essentially zero at very low temperatures are referred tvr cfa7f pnuv;je9 a4n9*7pu *o as

  What current is flowing if 0.67 C of charge pass a point i x 0ea9wx1,eynn 0.30 s?

  A charge of 12 C passes through an electroplatixu 6cf9:hiq 8e15 -bcotr3askng apparatus in 2.0 min. What is x1cut: 9 saqfk-b rho8c53 ei6the average current?

  How much charge must pass by a poixdvj32t*,g k nnt 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 if6ks nnwc5w5-k $4.0 \times 10^{16} \; electrons$ 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, hasgnpfw : x er0;nb;sv at6(:gkce0 sb66 been left on for 10 min. What is the net number of electrons that have passed th:g0gsxe6f k6;0p (bbantn6:w sv c er;rough the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg of silverx d4;r hnr57ff 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 singly charged, and the atomic weight of fd5f n4x7; rrhsilver is 108.)

  What potential difference is required to cause 4.00 A to flow through a *m8lb)hv nr/.prjmbzwtng3 -w(4 s fv ,j)gi) resistance)f pn zn(tjrig-h*v). vmbb48jlsgwr,)/ 3mw of 330 W?

  What is the voltage across a 5.0-W resistor if the current through it is 5.0 1ov7h0f q d(a5(f* vv2nzapnv A?

  A 4000-W resistor is tt7bephl+ */ld++gdo connected across 220 V. What current will flow?

  A light bulb operating at 110 V draws 1,uck4av52rfpgfk :b msk /;j 9j)uu;c.40 A of current. What is its resistance?sk/ v5 u9mj;f:rpuau;4c ) ,2fckk gbj

  A 12-V battery is connected to a 100-W resistor. How many electron74+ db-ouz) n xhu4glts flow through the 4xgh ol7+ 4dtu)zu-nb wire in
1.0 min?

  What is the resistance ofzqyzl7 legv,mye.4, + 1.0 m copper wire of diameter 0.40 inch? (The resistivity of copper z,qe v47 y.,lzgy+melis $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistan3ud x, m ge +0hj;eurz96;hpswb/une/ce of a circular rod 1.0 cm in diameter and 45 m long, if the resist r+zsju, bpne;hhu 0;9g /xu36eed/mwivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resistivity+gtfw,pp+ep,*xcuyce r7hn-9p*9vm $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (resistividf: nhik082 u p8wv0fw ut:za 40de2lbty $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.04qr:t- qy8ogm.asuo8 jlw/ v3 m long, measures 0.040 ohms. What is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge (the radius is 0.321 mm) niz ci;+b6khep*om a (c;chrome wire if it is connected to a 12.0-V battery. (The resistivity of nie*m ;bz;6hoc c (ka+pichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cmw7 z65hh 0 9d vujywm.4gv j)qk)xshm+ long and of rectangular cross-section, 1.0 cm x 2.0 cm. What is dkw9jhh4 .mz6mv+)w0gqy75 hsu v xj)the 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 anl 4og;yi9zyl e fic,8ae 5)bg-d 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 (7 vlxjhz +wj kdi l24*;9i ln87anll48dtyvi: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 rexbhg*i*d( e( eyai+ 0bsistance 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 resistivt nfe8a86 cte7pkt 2w;k3zk, bity 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 indium. The r5n 7 nq ,w0nnh3bo(bzsesistance ow50(hqn7 n,nozb3n s bf the platinum 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 throxa g (jy4clh5wa kp 093j6bb6n g7uj-uugh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current will it draw?+l*bhxk2 qs l7

  A 150-W light bulb running on 110 V draws how p.a:tsdx /z 9bmuch current?

  What is the nominal resistance of a 100-W light bulb designed to be use3rtuz/s 60oowd in a 120-V ciruw 30soz6tr o/cuit?

  A toaster is rated 800 W at 120 V. What is the resistance of ite73o 0-v5 hh ueqcj5+ w.zqkpas heating elemenqe 3 q5hwpkoe- 0hzjv+.5uc 7at?

  A 200-W resistor is ratedb pm8nu5e5 mj32j zkpn 1d*cd2 at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is 5/5ouukn3;kc2 n+b-toegkz la*n d9orated at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, wh9*3 1rb hewzwtat current does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is its rxegq0 z++olsb73 xh6 b9r ;mmp 1hwp0zesistance?

  A 25-W soldering iron runs on 110 V. What 6di4pv;2ix mhis its resistance?

  How much does it cost to operate a 25-W soldering iron krxhl ea/2rn0z l h 5;4kexongn)60c4for 8.0 hours, if energy costs g5x4 hrex24lan/eo)nlzk; 06 0chn kr $0.08/kWh?

  How much energy does a 100-W light bulb use in 8.0 hou+o +-qsz qi fr(g* o,fxf4,wuirs?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much heat enero)k;4 ; mwogi.o,g335b fogoscsmsk (exa+7 xgy is p;k4 s3+caog x.bw f7 oomgkg)eom ;sos(i3x, 5roduced?

  A battery is rated at 12 V anh/*xal nj* 1c8okg miieiy7 cn8x-m f +a;a10bd 160 A-h. How much energy does the battery store?yof b ;7/n8a khxa-ml0*n*8m ecic1jaig+1 xi

  How much energy does a 25-W soldering iron use: zkw **6axlsw in 8.0 hours?

  A 100-W driveway light bulb 3c/xm tftnx 5duz 03cf n609ltis on 10 hours per day. Assuming the power company chargecl5 z90x0 /t3tfx mucnn3t fd6s 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0 hours per day.jyz-gk 48cd j(24* fe u7qu eineoq0,a If electricity costs 10 cents per kWh, ho4 jnijo72z*cq ea-0edyuegk,(8 q4 fu w much does it cost to run the computer annually?

  The monthly (30 days) electric bill included the costzilen;t+e)5 h 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/dz;+n ei5 )hetlay. How much 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 andg cl8fwwhpx+ht), ys :m 95s7m 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%. (Assum,87 x:5 wt) mg9 psfhwmchy+sle 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 through:1 t)sux3uy2)d p 9dz*zfqerp $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs 4 jt40ba.zeoz $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 l:nlidkskv/a,x1 * q6hp has 60% efficiency. How much current does it draw from a 120-V line? ki d1,xsa /lnv*:lkq6 ($1 \; hp = 746 \; W$)

  A 500-W device is cok u7bt9p8bti( nnected to a 120-V ac power source. What rms current flows through thitu( k9p7i tbb8s device?

  A 500-W device is connectedep ftw* jzjc8ic1 9c57 to a 120-V ac power source. What peak current flows thro czc1jj9tcw *pi8e75 fugh this device?

  A 500-W device is connected to a 120-V ac power source. n-h 2ls8+ mi2pmz*wya7et:zw What is the peak voltage acros-tem7szya8zp+i:2 w2wn m *lhs this device?

  The diameter of a copper wire ; 4q6.c8ezuttp8k )yx(dchcr is 0.081 inch. The maximum safe current it can carry (in order to prevent fikxq rc t u.6d 8;8ze(4chc)yptre 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 $8.5 \times 10^{22}$.)