A device that produces electricity by transforming chemical energy into elec 8bvo*w cs288q:)da sv:mja eitrical ensv*aa v8mw8 )j2dieco 8bs::qergy is called a

  A car battery

  The total amount of charge t1,ug b-s ,v2y fjehf5chat passes through a wire's full cross section at any point per unit of time is referred to 5b 2 c1, jehfus-fgy,vas

  The direction of convention current is take 8tdsvn2tba9(n to be the direction that

  A coulomb per second is the v5b*crf +c;pghev l 7ohh;;dr lx(*c-ea(ln)same as

  Car batteries are rated in "amp-hoursafrst 1airj2 *(7x)fr ." This is a measure of their

  The resistance of a wire is define *qdcd+:lsq ,wb*so*p d as

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

  The resistance of a wire;ltc)o 5uyp,s is

  The resistivity of a wire depensytm);b(h)b. pxr me+ ds on

  Which conducting material has the lowest resistivity gw1w g jr8jmp06hut /7value?

  Consider two copper wires. One hq.lh gcj5;,kj9 (6hmim 4ywu mas twice the length of the other. How do the resistivities of thegyi 4jhm uc; mlm(h qk6jw,.95se two wires compare?

  Consider two copper wires. One has twice the length7 13cls4vqhx 3 fj 5zsfwtekh ;cu*:7f of the other. How do the resistances of thqhj*zf 7ftksshlw:x e 1v fuc7 3;54c3ese two wires compare?

  Consider two copper wires. One has twice the cross-sejsq0v m 0wu -q-zs4uz6ctional area of the other. How do the resistances of these two w0 mzqz-v0-j uus 6swq4ires compare?

  Consider two copper wires. One has twice the length and twice the cross-sectiwc (l3zgk( l dd,*ur-ronal area of the other. How do the resistances of these two wires compare?*dkgz d((-,r u wllc3r

  The length of a wire is doubled and the radiuslrkq k,8 rw;7:*dq kcy is doubled. By what factor does the resistaklq,qy;ckwrd8rk* :7 nce change?

  How much more resistance do*bikmry(ei* :+xpm6dm og)l :es a 1.0 cm diameter rod have compared to a 2.0 cm diameter rod of the same lengtidrxe p( :+om) i6gym bm:lk**h and made of the same material?

  The resistivity of most /ht8)j, ur d eiuve.i,common metals

  Negative temperature coefficients of revs6vvyr9gj( (*lx q 4ysistivity

  What is 1 W equivalent tvw2msl4,) * oaf tpq:jo?

  A kilowatt-hour is equo:xqga* g1 y4tri36 8n a) j0dqg4xwdkivalent to

  If the resistance in a constant vorcr9h xdjp p,137cvz0u+qo 1tltage circuit is doubled, the power dissipated by that circuit wi,9t1px0 zrc cvu joq3ph1+7dr ll

  If the voltage across a circuit of constant resistance is doubl9-mjo jvy (o6yed, the power dissipated by that circuit(voy jmo69jy- will

  If the resistance in a circuit with constant cual 1x;6ec0c.fb d t:(0acdlg ftik3tcz.l l7* rrent flowing is doubled, the power dissipated lf*.gl x fc16:0.ccac;d( bill0et3zkttad7by that circuit will

  If the current flowing hca7 nwvdpwrg /n/5 4,through a circuit of constant resistance is doubled, the power dissipated bvrwac, gw7n dp/h n/45y that circuit will

  During a power demand, the voltage output is reduced by 5.:)pr u bltp5czf/9u.r 0%. By what percentagtur)u9 :zr/5. bf pplce is the power on a resistor affected?

  A current that is sifg /q f( ,ps)y lqz um,x5upn)xqz9q78nusoidal with respect to time is referred to as

  Consider two copper wires each carrying a current of 3.0 A. One wp1a-y brj ed6sz(ffa6g0 x*,cire has twice the diameter of the other. The ratio of the drift velocity in the smaller diameter wire to that in the larger dib 6fadc,0-z1 e yx6fjr*pgas(ameter wire is

  Materials in which the resistivity becomes ply/ln *8ugx: essentially zero at very low temperatures are referred: p8*yn ullgx/ to as

  What current is flowing if 0.67 C of charge pass a point in 0.30 xe9d4o j(l (eefdr )p,s?

  A charge of 12 C passes through an electroplating apparatus irhz5, qdue r( e/7-wpxn 2.0 min. What is the average cue7 r5hezu(, w/-qprxdrrent?

  How much charge must pass by a point in 10 s foqux;.9x71 0ljug ctu(m 0h w .tztp6yjr 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 flowingbkf*g g*c 01bw ; *qdsptpz(q- 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 t0c wxxph(0kih,.y +c 13.5 A of current, has been left on for 10 min. What is the net number of electrons that havc(.+wphi ctkx ,0yh0x e passed through the coffee maker?

  In an electroplating process, itvpb )1cuaw3g 7 is desired to deposit 40 mg of silver on a metal part by using a current of 2.0 A. H pvaw c)ub137gow 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 floe8 w*jkkg -hn2w through a resistan kke8-2*h ngwjce of 330 W?

  What is the voltage across a 5.0-W resistor if the current through it is 5.xcw k /zjw8x7i9 puc260 A?

  A 4000-W resistor is connected across 220 V. What current w3ha pl-3l7,kay+v*g tcbper5 ill flow?

  A light bulb operatir: ri cfnd5f3fw.1wj3c w*pu3 ng at 110 V draws 1.40 A of current. What is its resistance 5:cwcwr*f 1jrp 3i3.wfundf 3?

  A 12-V battery is connected to a 100 0b.ciq(0d;2 g kroj2v )nystk-W resistor. How many electrons flow through the wire i kyij; 20c2dkb .ts(0vn)roqg n
1.0 min?

  What is the resistance of 1.0 m copper 0 ( p3y30m) jn )n,bmtlkztulqwire of diameter 0.40 inch? (The resistivity omnkzt , ump 0 0b)lyt(l3)jnq3f copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameter ana.o )xmnxwn n2 u.e6:jd 45 m long, if the resistivit6.)annjx n.: xwu2oemy is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resistivrj wjj,jmh02tw2ur +t)6nj/eity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (reszz;(i5/ef5/z l mye w;wzhklwb214f( sobh3t istivity $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 ohmsb +i u*ltu*f)v. What is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge (the radius is 0.321 mm);t v;*(tid:)ijck ix x nichrome wire ifxtkx:ci;i d;) jt(iv* 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 croo)xpk 73bnz 1fss-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carries 4000 A?3) 1pnzo bfkx7 (The resistivity of copper is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichrome wire has 1ps hao(-9l rwc(z67sd6h2x xodjke6a 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 sdatwjwe4 um 8+8rf3+ wire (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 alt,b,3wgz1 az z(v;zmms/ec7-x lh1l 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 of resislw ;;7u)h-npeavlg*i d4t(tptivity 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 resiss, kyx2 u+(d3 urgfe+gtancksu e(+,gr udxy+fg23e of 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 an . w .a-d8q:s5d rbtcoh/ltk:e$10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W/ lbi4mqpjof abq5/cbc37 4b0 . What current will it draw?

  A 150-W light bulb running on 110 V drawsydujo on6tr-f4it*0q(ox r-a)+.w h v how much current?

  What is the nominal resistance of a 100oxla+7+ qggh0fk e2:b-W light bulb designed to be used in a 120-V circh2xlggeo ++0:k qfa7buit?

  A toaster is rated 800 W at 120 V. What is the resistjti.xiyt a+3 s0u k.e2ance of its heating element?2.tuij.a0ets+xy 3 ik

  A 200-W resistor is rated at n) .0beuccivtq6zp(e2c cf11/ s hxh4$1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated + eq0zn gg(etb,4 1 wmrtiuz6(at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what cuk8 l3uwh *6bcmrrent does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V,qca w-39ut 8g2eiacy) what is its resistance?

  A 25-W soldering iron runs on 110 V 58ig.ls 0au .eeoqwh.wn7gq 2. What is its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.yln;hg + qr)jm) (zzg9d je..a0 hours, if energy costs .r gzq;dzejgjy.( a9l )+nh)m$0.08/kWh?

  How much energy does a 100-W liu qo-zb7ex h ga-e6592r*etsm ght bulb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line (c.dty rhm0:0 j.p 6.(8mbodl hxktaafor 2.0 hours. How much heat energymmko :(h(xaay0pth .rtbc 86.j 0ddl. is produced?

  A battery is rated at 12 V and 160 A-h. How much energy does *fq2rd2kfd 8e the battery store?dfed k2 r8q2f*

  How much energy does a 25-W soldering iron use in-csp .6:lyotjf, p3w f 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming the power()6l7 h6guhzkcgva c1iyi,(l company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual l c i6gzl6hha)7 ivky,cug(1(cost to operate the bulb.

  A 400-W computer (compu -;(/o vb( b;dkul84vwzmsqq tter plus monitor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to run the computer annually?v(s4 b;bqz d;m/kvou(-tq8 wl

  The monthly (30 days) electric bill included the cost of runz g:6g ykff6blh h5h31ning 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 electkl:yghghb15 fh 63zf 6ricity costs 8.0 cents per kWh?

  The heating element in an eled053i r-zob*fu j7dk jctric drier 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 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 heati 0zjjki* -5udfb 7o3rdng element?

  14 A of current flowb8(v,-v esd/t l6 rizws through $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs xdfq vx583zn y426cqv$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% effiecvc7( kn2zdb9 0:j tcs i7su1ciency. How much currevtd9c: sjze21c0 7(bik7cnus nt does it draw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to(;mobxcx rq/ya (+z)r a 120-V ac power source. What rms current flows through this devicxc oryqr )+z a;m/(bx(e?

  A 500-W device is connected to a 120-V ac power source. What pe vo)4bf)j(l+(i4rp omc ms 0xmak current flows through this device) mr4 4 x0fojm)(cmpoisbvl( +?

  A 500-W device is connected to a 120-V ac power source. Wha5.qoqy(-ci,xn - qmevt is the peak voltage across this devm o5q,xe-niv-(. cyq qice?

  The diameter of a copper wire is 0.081 inch. The maximum safe current it can +vlbcy dj7+9 k4hx 2nocarry (in order to prevent fire danger in building construction) is 20 A. At this current, what is the drift velocity of the electrons? k+7ldhx 24coy+nv bj9 (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)