A device that produces electricity by transforming chemical ./,alwu-v lah energy into electrical energy is c/vh.l-wu al a,alled a

  A car battery

  The total amount of charge that passes throughhfn4eh- axkv:4i dn.v7fjd 03 a wire's full cross section at any point per unit of time is referred to aj xn h3nik4f7: aefvvh d04.d-s

  The direction of convention current is tak/ 34v b,h6nmi/p,l rhs a1f,a;yelaleen to be the direction that

  A coulomb per second is, (x;l-b-uha3wg a ewu the same as

  Car batteries are rated in "amp-hours." 7 ttz ti0(f;eayh bzc3i+ 69iuThis is a measure of their

  The resistance of a wire is defineds,wrgx*w1+2vfgxuo : /cxi: n as

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

  The resistance of a w x6+*;hh - n:qwg7zt1q3novotwzh/+*dzwt ju ire is

  The resistivity of a wire depends o-gu;hp0 a)r 42v 24rnxksb qien

  Which conducting material has the lowest resistivity valu0l,iack2vq b978if2cvimpmzgg(4 n -e?

  Consider two copper wires. One has twice the n631) n7x,clrwvf8vt n 7 sterlength of the other. How do the resr1t )n 7rwfnsxv6lentv,783cistivities of these two wires compare?

  Consider two copper wires. One has twice the len.f(w.gvk2oy b gth of the other. How do the resikfb v(o2.y.w gstances of these two wires compare?

  Consider two copper wires. One has twice the cross-sectional area of thespt*f0yd1x 82nx w ic1 other. How do the resistances of these two w0 x*w1i2ps tx81ydfcnires compare?

  Consider two copper wires. One has twice the length and twice the c(b/5f wiif kuu3(:simxxid2):ai0 srross-sectional area of the other. How do the re3f:i)b5r sfkdaii/ux0 uw : (mix(2issistances of these two wires compare?

  The length of a wire is doubled and the radius is doubled. B ;p*rw3jv 7wu)soa /iq l:gzx(a;s;eay what factor does the resiz;u;:;a7s)rl/v(ea *g3wq pa jxw osistance change?

  How much more resistance does a 1.0 cm diameter rod have compared to a 2.0 cma4v*y9kbe.esd 7s kg;mv61jhpk3 s(v diameter rod of the same length and made of the same materialvdevsgy;ek*ka76v(bs p3.91sm4 kjh?

  The resistivity of most common metalka0(yxupz u1:enmw -m 5 j19pzs

  Negative temperature coeff zza:s+s7 j;2 xwnky ha4g:l;jicients of resistivity

  What is 1 W equivale 3(z)e 0.jz hr) 5 4selzj5lcl, uysvhnmd.m2mnt to?

  A kilowatt-hour is eqhhrg7pw4o8tg6 swh1*e )(qohuivalent to

  If the resistance in a constant voltage circuit is doubled, t skx6oyom -t)tp0s (ui94k9a whe power dissipateda 9wss to40ot(9)-6ik xkpym u by that circuit will

  If the voltage across a circuit of constant resistance is douax8 04 fb,ks ,qrnxos;bled, the power dissipated by that circuit will;ks,rs4b0, 8nx xofq a

  If the resistance in a circuit with constant current flowino +qa85x tbj.sg is doubled, the power dissipated by that csq b5at8xjo +.ircuit will

  If the current flowing through a circuit of constpu kkak * o:f5 e2(bq4y6rhtum2r +l4iant resistance is doubled, the power dissipated by that q(p+yai52 ko64 ublut* 2mrr:4k fehkcircuit will

  During a power demand, the voltage output is reducedbh oe9o3t7 p8b by 5.0%. By what percentage is the power on a resistor affectedh o8bpbo739te?

  A current that is sinusoidal with respect to time is referdde-n *+zq4( .i2m+gv ej deywred to as

  Consider two copper wires each carrying a current of 3.0 A.g,rr,0ginkh/jg5u x,2/ rm cz One wire has twice the diameter of the 5mrrj0 nzrxggh ,k/cg,i/,2 uother. The ratio of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomes esslw3babye*)n cjv):ds ,h,qqag: 9gw *entially zero at very low temperatures are re,)3*qcw n yj*9ad: we qvsga:g,bh)lbferred to as

  What current is flowing if 0.67 C of charge pass a(ot(qc 8k gxw8 point in 0.30 s?

  A charge of 12 C passes ta,t2g c6d1bj) t*c kfbhrough an electroplating apparatus in 2.0 min. What is the average currc,dtg *t1 ) 2j6cbabkfent?

  How much charge must pass by a posngx 0 qio3p6vg(h2 /uint 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 flowia ol8wa(n ron*pd x*85ng 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 of2 /w7 sln6trhq5x-ysa current, has been left on for 10 min. What is the net number of electrons that have p wnyqss/7a-r6 h52xtlassed through the coffee maker?

  In an electroplating process, it is desired to depoy tosv* m7gy38sit 40 mg of silver on a metal part by using a current of 2.0 A. How l8m7ygytv s* 3oong 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 f 6,lx)vh v+v1gvrgocvtk jz( 8yo47 (dlow through a resistance of tocgk7(jh6 dvvo)yv, x14rv z+vlg(8 330 W?

  What is the voltage across a,n ac lk/9,lggnppft8-cs 0p/26i dfu 5.0-W resistor if the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What currentcbt fgno8d3w fndv 7qdou 4,o (l:h098 will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its r6hb p8x45m- u8 yuv-hbqq(vqfesistance(up4u5bq6qqv xb-h m88h y vf-?

  A 12-V battery is conngws). nuf5mwho;p -n*ected to a 100-W resistor. How many electrons flow through the wire igph f5.nnw;o- *usw)m n
1.0 min?

  What is the resistance of 1.0 m copper wire ofvi(q zsjt6z8bde qv3ql6:16n diameter 0.40 inch? (The resistivity of coppe 3 z q :s8jvle(di16t6nzq6vbqr is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameter and 4 rv+k2s wd2 :kjr8iw2 kfmr,r:5 m long, if the 2m2dfw8ki r:j:kvr,+swkrr2 resistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (rrb 50/ 9tkqnv*tnoq/q esistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (resistivgg+u8d b 6dkb jk(vsq4cg8p z(u(bg4;ity $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 itp9e3 oaeot xd ukx4y.12mp)c/s resistivity?

  Calculate the current through d u3w nf)i-**pqhqj4 ia 10.0-m long 22 gauge (the radius is 0.321 mm) nichrome wi j3) p4-h **uwnfiiqqdre 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 rectangular cros8 t 7upxj-gc6,fa6 4 -aopqyjqs-section, 1.0 cm x 2.0 cm. What is the voltage drop along its len6q4uqca oapp- y6-g ,7xtjf 8jgth 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 rw8s pky/xy0ie/la 9r9esistivity 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 (resistivity 2q os+r)4j h2boc tak0$1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistavtd z8, 1) c 9gebp4;gqu+hibkw-pm z)nce 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 resistivity of platinum iu+(c :exm ,pops $3.9 \times 10^{-3} /^{\circ}C$. 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 tki*b.e ck5fi3g 4qp35l) tnk uhe melting point of indium. The resistance of k u5e blf*gkip33.ctik)54n q 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 through anr*d*x0en 4kr b $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 120g;q il sll5hlif: q tb:722mb88iuxl 90 W. What current will it draw?

  A 150-W light bulb running ono jsf+un. .p(z h:ig4m 110 V draws how much current?

  What is the nominal res,i ,f1mvx(b lsp*vg, bistance of a 100-W light bulb designed to be used in a 120-Vvs 1l,ivmg,x*b( b, pf circuit?

  A toaster is rated 800 W at 120 V. ndv)zbtv e pbim,:07f)g 3i a:What is the resistance of its heating element?:m3v a)di)f:ntvbg0i,zbp7 e

  A 200-W resistor is rated v d.42hu zdqljzdf.* ;ht8( bkat $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated a0rbz:cb9bz8u7ru ya8t $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what current doyd/o emwxm7 e;d m,5p*ore gbnjzt40a- v,f/4es it draw?

  A lamp uses a 150-W bubp+o:g(1ld m dhw*y,clb. If it is used at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What is its resistanm:- s mvm+ooq:ce?

  How much does it cost to operate a 25-W soldering iron for 8.0 m n;iaqz7fe.1e 2*wyzhours, if energy costs 7;ymizawee.n 21qz f*$0.08/kWh?

  How much energy does a 100-W light bulb use o 1*9t ,lqufe3vem 4xyin 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours.n;9tox 1lb2b w How much heat energy t1ol;9n b xwb2is produced?

  A battery is rated at 12 V and 160 A-h. How much eneooj :hd5u6a1m rgy does the battery store?mujo 1d6 :o5ah

  How much energy does a 25-W soldering iron hh*sw-7 im5 c vow:sc ea)gf;(io:6ix use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per daybc hg)ms j6pt.e3ds0-s xzt1 j0rkv19 . Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost tg m x0rskes0tbs )t-1jcp 6j3hzd9 1.vo operate the bulb.

  A 400-W computer (computer plus monitor) is turned on - ib9b5i lnjo.8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cosljbo9. ib5- nit to run the computer annually?

  The monthly (30 days) electric bill included the cost of running a central mv6:( xq7lkxfair-conditioning unit for 2.0 hr/day at 5000 W, and a seriexfm(qx l7kv6 :s 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 per kWh?

  The heating element in an electric drb g z5j5tbj 2wj/hh9+iy :(zxeier operates on 240 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 unchazj(hgi+ xyb:z/9 h 2jbj5 ewt5nged. 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 ;. r1uq p8. j)sftz/zv3yfuk p$8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs a6ur)gie o gl :kg9mcau/e3+4 $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% efficiencye5oz+t nm2gas:uwa1;2c9 jcyaq ,k 6x. How much current tqg6a;u sy a +c,jz5: ck2ne a2w1mo9xdoes it draw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rms current flows ) lm6,rd:r-idjn ib6ithrough this-,d :n6i rdlrbi )ji6m device?

  A 500-W device is connected to a 120-V ac powez u3f1m lnk) x/5 ak6b(ehrcsef,4c.rr source. What peak current flows througzu r)/ 6k.ec543fc ,albksf( mrnexh1 h this device?

  A 500-W device is connected to a 120-V ac power source. r8zic2dxou5- What is the peak voltage-uc82z xod5 ir across this device?

  The diameter of a copper wihd7gt iwsr x/ k;u,- 2b5py)mere is 0.081 inch. The maximum safe current it can carry (in order to prevent fire danger in building construction) is p 2ygt7umw dk) shb ir-5x;/e,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 $8.5 \times 10^{22}$.)