A device that produces elhr .mr . v4chg.w5r6olectricity by transforming chemical energy into electrical energy is calledvcr rr.hw4.o5 6mglh. a

  A car battery

  The total amount of charge that poy;*u l*l3/d 9w6lliqk 9yl zxasses through a wire's full cross section at any point per unit of time is rlulzlqi ox3*k 9lw;9d/*y l6y eferred to as

  The direction of convention current is taken to be the d:-tmcu e+9j/jvl4 npdirection that

  A coulomb per second is h6ov/r p8.pd 4rcn pr/the same as

  Car batteries are rated in "amp-hours." This is a measur8-a,a lte e(bfe of their

  The resistance of a wire is6lx6q,1i68 2eycnqxu8 9b imz*kfrn s defined as

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

  The resistance of a wirq*lc,u - apmr-e is

  The resistivity of a wire depends oo uussh3)8x9bpfgj/2 5hq ; akn

  Which conducting material has the lowest rbz.lba09r l7 e/ct*quesistivity value?

  Consider two copper wires. One has twice the length of 4t ,-.f yx8xt7dttq plthe other. How do the resist8tx7t4dy-xt q. p,lftivities of these two wires compare?

  Consider two copper wires. One has twice the length of the o v1lwrkaqg/ /ca*) wa.1i gej*ther. How do the resistances of thel1r *v*)ww/ e1aaaqc/ggik .j se two wires compare?

  Consider two copper wires. One has twice the cross-sectional 60br i9.ax1x5v,ngr qd6z luahcsd 8:area of the other. How do the resistances o6r vz,x aiglnaqc9rbddx86hu:051 s .f these two wires compare?

  Consider two copper wires. One has twice the le:pj8w*o ww+e,hoog m1fg,j2o ngth and twice the cross-sectional area of the other. Hogpfe,o*jwohow j w8og:1+m, 2 w do the resistances of these two wires compare?

  The length of a wire is doubled and the radius is doubled. By what fac0c+ riru4 8aqhj19so2/roqydtor does the resistance/s j4+ a201 9yoq rorch8uirdq change?

  How much more resistance does ao46:- cpvy gsp 1.0 cm diameter rod have compared to a 2.0 cm diameter rod of the same lengthp-vspyc o4 g6: and made of the same material?

  The resistivity of mosvocl ,vxx(7q b*8w9+ hmysmc)t common metals

  Negative temperature coej8/5s(gwg,ejpwzkg 2 (j/ut o ge *q:kfficients of resistivity

  What is 1 W equivalent j4+ 9)hvb j( w snlgb4gbvn7g) v-ibxr0ujz27to?

  A kilowatt-hour is equiv beauvdw,ab +a(v;83mrwd: ,w alent to

  If the resistance in a consta40fsg p9:te ght:3mru rnuu0+nt voltage circuit is doubled, the power dissipated b00s:u 9+tg43:gtfr nueu rhm py that circuit will

  If the voltage across a circuit of constant resisto+wi pla/bzx .w6y -0iance is doubled, the power dissi iax- l0p6z /+oiybww.pated by that circuit will

  If the resistance in a circuit with constant current flowing is 7wkqhx7 xh:0/ 7zbbk3xuy;pe doubled, the power dissipated by thq bw/ux 70 y b;khexk7xh:pz37at circuit will

  If the current flowing through a circuit of constant rq9id4g8*y33d zlx,n nb2, t bepij(kresistance is doubled, the power dissipated by thatgi x38yn, b43e( diq dkplrz*b29,nj t circuit will

  During a power demand, the voltage output is reduced by 5x5(xr2 bv t+dc17djq.2dgtz z .0%. By what percentage is the power on +zzrt27gd.5x cv 1(t bqd2xjda resistor affected?

  A current that is sinusoidal with respece e1m:vwql*- qt to time is referred to as

  Consider two copper wires each carrying r beqi3aak7 2-a current of 3.0 A. One wire has twice the diameter of the other. The ratio of the drift velocity in the smaller diam eia2kq 7br3-aeter wire to that in the larger diameter wire is

  Materials in which the rly*:s sb16t xmesistivity becomes essentially zero at very low temperatures are b 6stlm*y:x1sreferred to as

  What current is flowing if 0.67 C of charge pass2tfeu-w g1lzf 1u9vi; a point in 0.30 s?

  A charge of 12 C passes through an electroplatingko;r+ ,nbkn;d apparatus in 2.0 min. What is the r,dn;o;+k k nbaverage current?

  How much charge mustlj 6xjh(nttp( dr2v.( pass by a 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 flow95s -dfbgv)i( rc2x.oguas g)ing 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 of current, has beene on,+t6l391 d pwnbzn left on for 10 min. What is the net number of electron961 lonn npe,+tbzw3ds that have passed through the coffee maker?

  In an electroplating qa crjlt ys;5 -7hcm:7process, it is desired to deposit 40 mg of silver on a metal part by using a current of 2.0 A. How -7t5 7 cs:jcayr;ql mhlong 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 cad nj61lfa,x /bc8a wc/use 4.00 A to flow through a resistance ofa/djfb 1cc n68/l,a wx 330 W?

  What is the voltage across a 5.0-W xk )c+gs7td (yresistor if the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What cu(vi vnf:yy7.dioo x,2rrent will flow?

  A light bulb operating at 110 V draws 1.40 A of covs9ey lt)mx3s(p)j ev;-q3 v urrent. What is its resistancesotxmep3 qvl;(s) v 3ev9yj- )?

  A 12-V battery is connectem67(gr: k8e x -/eh*t0wmnw(vfw kbaqd to a 100-W resistor. How many electrons flow through thew(wnrmbagewmk(qfx80 t*/7k :v6 e-h wire in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0 t,oa 8:)z)8ais gfyhv.40 inch? (The resistivity of coha)i):yg88f ,s atz ovpper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in 18 m,yz,,3ees ,8zmydgkoc bidiameter and 45 m long, if the resistiviti8mozezb e1y y ,kc,8g,,s3md y is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resistivi+fml5l ;o+yzl5runw ,ty $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wvl dd;+qzkej -8 +rc8sire (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 its resist i-f7 m*7sw 5+nd7 ,acmeckapiivity?

  Calculate the current through a 10.0-m long vkdj35sl(-r f 22 gauge (the radius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. (The resistivitrk3 5( svlfjd-y of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and of rectangular cross-wq c;ds a i9yw33/p f--h;jzfp y;whe5section, 1.0 cm x 2.0 cm. What is the voltage d p-5 yf9 hi way-;s;pchjw/qef;d33zwrop 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 a4b qujruc ,h;h3ddf61wq7 s3c;dlo/w 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 wire epd,qk d* *z9b.ywzx1(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 aou.(nz*dm)08hq 14td ncal qa resistance 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 fx0 jj 65y01 n vmgb -zvrfbch6:6oz9wof 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 indium. The resi 2.s7ydm; lreastance of the platinum 2erdm ls; 7a.ywire 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 l1ei :y i02tkl$10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 0wl-ffnp y0n7 1200 W. What current will it draw?

  A 150-W light bulb r i., njhg5n3j()04zybwnr mn pjsyt -(unning on 110 V draws how much current?

  What is the nominal resistance of a 10ck a2xkdxcx9x-;s,* e0-W light bulb designed to be used in a 120-V circuit x9ad,xesx2;k-kxcc* ?

  A toaster is rated 800 W at 120 V. What is the ox 1heiw 4k0*d knyro7+1le7h resistance of its heating elemen *77hnl edi+10h ooyr1x kwe4kt?

  A 200-W resistor is rated atv4baqy/qy-* x $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ratede ,xj0dg4esc) at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what curre4-qlikbk m5w/ nt does it draw?

  A lamp uses a 150-W bulb. If it is used at 143 6xg khy7uteh disrm y26)*e20 V, what is its resistance?

  A 25-W soldering iron runs on 110 Vkikwt/ p)) uu egkf;bg8 3u8j8. What is its resistance?

  How much does it cost to operate a 25-W soldering iron for 8hw laqy (ym-2:o;-) d j1okgpj.0 hours, if energy costs ;ydo o:kyl-)1gq w- a (2jmjhp$0.08/kWh?

  How much energy does a 100-W light bulb zawu-,8r sukw 6rn;z) use in 8.0 hours?

  A 1500-W heater is connecg s91iyivd)h6/:9x lgffh+nrzqd.+s ted to a 120-V line for 2.0 hours. How much heat energy is prod+zxd)s6/s9 digf :v.g9h nl+1rifqyh uced?

  A battery is rated at 12 V and 160 A-htyx2n6hx, y :h. How much energy does the battery store?hy y:x,2hxt n6

  How much energy does a 2n s *wysd1 h.8zer,q/b8khu 2m5-W soldering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assum k(oz 369v swauu4njuui+,u(ming the power company charges 10 cents for each kilowatt-hour of electricity used,9(u,nks6u(zo wu+j u mv4aiu3 estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus m vxa ilz-i0ud zcjfzkwr;;7)q 6:91uu onitor) is turned on 8.0 hours per day. If electricity costs 101:ulzzk x6vqf7;a i;rzcd -j9 i 0wuu) cents per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electric bill included the cost of running a centm hq kbtv 0b)u0+exqhs.35od8 ral air-conditioning unit for 2.0 hr/day at 5000 W, and a serie0qq txd0.s5ohhbb3km) e8+ v us 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 drier operates on 240 V and generaty ,)g,xspw zt3rq2,+gg/b sc ses heat at the ratg)swg2rbspzxs/, , q+gyt 3c, e 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 through-rfv18kem 3ew $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costsxr)2 k(jada qure k6 aa0df41t0xx;:b $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% eff ee:s r ne*sfqc- .dj59j+q6pliciency. How much current does it .q5fns+ec9epl j :* -ej6dqrsdraw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V acr,v6l n :ftj4f power source. What rms current flows throughf,t6 4vljnr:f this device?

  A 500-W device is conneccdyn)j76g;ndr wer/;:p0 i mxted to a 120-V ac power source. What peak current flows through this dn7j6dwn yexc ir 0:);;p/ mrdgevice?

  A 500-W device is connected to a 120-V ac power souk, k)/c1zq*x oqeos e l98ojkn*v y-v1rce. What is the peak voltage across thi-)csojx kqo o*vvzel8 / ey*kk9n 1,q1s device?

  The diameter of a copper wire is 0.0cwb8fd.n3 vszw*:2h w 81 inch. The maximum safe current it can carry (in order to prevent fire danger in buildinb3w8 hc*w.vf :zd2 nswg 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 $8.5 \times 10^{22}$.)