A device that produceswgzd za.q*a0 7di( k6vi/wyg6 electricity by transforming chemical energy into electrical energy is c( dyag0wq7 zikzgdv a6 .w6/*ialled a

  A car battery

  The total amount of charge that passes through a wire's full cr8iyynmb9uyv4e( nb7z* i*n -hoss section at any p nye4*- hiz 8v9(buy7 ibnm*nyoint per unit of time is referred to as

  The direction of conven2nd b7*gi:e8kgbf lb7tion current is taken to be the direction that

  A coulomb per second is the same a- ov sh6:vd.r+pm (vhyzih y23 4bz5shs

  Car batteries are rated in "amp-hours." This is a mr boy9a*m113ue5 u hgeeasure of their

  The resistance of a wire 3w.lp wk/fr2n1n e q(zis defined as

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

  The resistance of a wirwtuo m0lnf;k7d3/6 rle is

  The resistivity of a wi84dndk bfhf(3 re depends on

  Which conducting material has the lowest resistivit8plhpx .*142 uawfurny value?

  Consider two copper wires. One has twice the length of thg. ,skmuqf5,ge other. How do the resistivities of these two wiregu,q,f5. sm kgs compare?

  Consider two copper wires. One has twicet0detgr-h5,z k,2e if(r nyeh rsp.,. the length of the other. How do the r- kr5 .. h2rh0,,n pzefe,e dsyti(gtresistances of these two wires compare?

  Consider two copper wires. One has twice the cross-sectional a2h30 mmvnn ojhe:o rok9bplj(n., (y*rea of the other. How do the resistances of these two w(9ybnp 3v : *0h.eo2 nkmm,oojrhj(nlires compare?

  Consider two copper wu3qtl+m (x rvixq- :u8ires. One has twice the length and twice the cross-sectional area of the other. How do the resistances of these two wires compare? i3:xlu+(- vuq8rtqxm

  The length of a wire is doubled and thaf zu 17dn:,twe radius is doubled. By what factor does the res, uzd7:fat nw1istance change?

  How much more resistance does a 1.0 cm diameter f0oa.wqtm *xp 9)31deh5zum k(a wq s6rod have compared to a 2.0 cm diameter rod odx1tp *6zoqeau a9)m0.(k w 35mswqhff the same length and made of the same material?

  The resistivity of most common me r5m0fntbpz dme0825jtals

  Negative temperature coeffic0j* p c2e2uhju iu/.p 45einyvients of resistivity

  What is 1 W equivalef3 *hxrm1g .dtnt to?

  A kilowatt-hour is equivalq,ca 3 gphuj ; tmy*,cfkxj.1/ent to

  If the resistance in a constant voltage circuit is doubled, ( uxcbjej.+4z ;u8 .w2x1:zlfyrglyb the power dissipated by that:2yfbr8 j4.e+ xgj; bu1yll (zx.uzwc circuit will

  If the voltage across a circuit of constant resistance is doubled, the po1l (lo 7ze*)6ju(vygjno u*xy wer dissipated by that circuit ugoe7nxuz(l1oy6j)**j vyl( will

  If the resistance in a circuit with constant curreno)57(g:s o4ws2etwg m t3x*lcply:a nt flowing is doubled, the power dissipated by that circuit wi4sgets7p) twooayx:2 wl*(g5nmlc: 3ll

  If the current flowing through ae)932bp lt avca anzb)p. ,4ni circuit of constant resistance is doubled, the power dissipated by that circuit w2t z)ca n.9, nbea43piblp)avill

  During a power demand, the voltage outpu7h1m6 * +jnha gyawi7f8(wqzc t is reduced by 5.0%. By what percentage*mq7a176w +hgifzc (jn wh 8ya is the power on a resistor affected?

  A current that is sinusoidal with respect to time is referred to asqco1w tz)w8;/.r.jf8 vsvawj

  Consider two copper wires each carry u9tg su/yz2o)kd l6:king a current of 3.0 A. One wire has twice the diameter of the other. The ratio of the drift velocity in the smaller diameter wire to that in the t)kg dso:l6y29u /kuzlarger diameter wire is

  Materials in which the resistivity becomes essentially rec3un0+/usf tkfd0 w *)p* qnzero at very low temperatures are referred t *tnfq/0kdp)n*ucru0f sw3e + o as

  What current is flowing i;h.)m um *bfuf4eec7cf 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.i:.a9 kx/sty d:kb *gh What is the avera:kh g.bx *ds9yka:it/ge current?

  How much charge must pass by a point in 10 s for the current to be 0.50 rda(m4r1 8v;x gpjj, gA?

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

  What current is flowi:r1haqx.ig74( p9pimk*qh g 4n6w kdo -ltd0 jng 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 beevqmk-rw l2q(cn462 qc( fw ax/n left on for 10 min. What is the net number of electrons that have passed through the coffee maker?26wm(wlfq 4 qq/kan- 2crv(c x

  In an electroplating process, it is desired to deposit 40 mg of silsu)r )6/ ybudsver 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 y)sdus)urb6/ of silver is 108.)

  What potential difference is required to cause 4.00 A to flow c.dsuw f9371mhs3twz through a resistance osfu.z 1smh 9c3twd 37wf 330 W?

  What is the voltage across a 5.0-W resistor if the currentvc2 9,g.omdpb through it is 5.0 A?

  A 4000-W resistor is connectebqf(tsj8:y w( o frc+)d across 220 V. What current will flow?

  A light bulb operating at 110 V draws 1.40 lw :thw v8kr2):ncj3m A of current. What is its resistancen)rkvm: hjww:cl t8 32?

  A 12-V battery is connected to a 100-W resistor. How many electron .s0k2s.hjt hns flow throughh2s.h sjt 0.kn the wire in
1.0 min?

  What is the resistance of 1.0 m copper wire of du8bx;lw 7uaq+iameter 0.40 inch? (The resistivit+lqawbxu8u 7 ;y of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a ciox 4vw62k vci(rcular rod 1.0 cm in diameter and 45 m long, if the resicv k (26iwxov4stivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (res :4oyi mwdxopav+8i 2c 6e;idv4 yz,y)istivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (re7)ia:7r.5 a vb nw0gn, klnxtnsistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 isv, )p cv(l7 jd 3wlnx7q*ddxbvu vq257 its resistivity?

  Calculate the current through a 10.0-m long 22 gauge (the radius isxkn:4 avfd.6nie e+2b 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. (The resist2e.nxi6+b en4 :f davkivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and of rectangular cross-section, 1.0 cm x 2.08o taeva i:5+2nxa r-k cm. What is the voltage dro a5n2+ akraexiov8-t:p 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 resi h2(w1fghr9e3pr 9lt qstivity 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 (resistivi+jx bu+(u -aq mfow.bct84 pe-ty $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a r2suez6h m zdyf1r mf)*f.dp9 )c;(nwlesistance 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 platp:ys .0gx 6( jgtvwln*inum 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 resistanc(1obavx/ u.3i :h mii)yw r3ire of the platrwa3ri1(iui :h 3) .yio mv/bxinum 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 throug y exfn 87es1ok 71 es+xizdoj21*d-cunmwq0*h an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current will ibpww )/u8uf3y qnm0, yo an9,gt draw?

  A 150-W light bulb running on 110 V draws how much cu8j cg i-2vtzr2rrent?

  What is the nominal re6;lruhk35b e7gyvh- nsistance of a 100-W light bulb designed to be used in a 1263l; ehy7 -v5knburh g0-V circuit?

  A toaster is rated 800 W at 120 V. What is the res7yfm2eo x ycws175 uk8istance of its heating element?cy1f 85kym2e7s7ux ow

  A 200-W resistor is ratedzeof(wma (o 52 at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ratex a;j8qrcjjxa2*iwu4s,6 9 ald at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If isel1f,5cd zh zg3kz) *t is used at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. 6bm2v or 3mdd/2vucag, oo2m y:lxy 58If it is used at 120 V, what is its resistance?

  A 25-W soldering iron ru5; p */l empyws+oy0 jn5+fzjans on 110 V. What is its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours, if rcdg9 cwplm l-ppma0 ;(;,4*zdhua f:zn.im* energy conlp (;p0alcm-9.dg:dc fzm,wmh p ; 4iuz a**rsts $0.08/kWh?

  How much energy does a 100-W light bulb use in 8.0 houf 4+tz.-bbjk3chd8df rs?

  A 1500-W heater is condjcf31j2 h;tdfp16z lnected to a 120-V line for 2.0 hours. How much heat energy is jzdj lh6tff1 3d;12pc produced?

  A battery is rated at *,ctfn,k3t; i8/rvz d ap wd)p12 V and 160 A-h. How much energy does the battery store?,r a3 f ;dpdni,pc)tt* v8/wzk

  How much energy doesotlc+8zlv5 o qx/2w2 n a 25-W soldering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming n xp-v5ao5p9ethe power company charges 10 cents for each kilowatt-hour of electricity used, estimat9epv5-p x an5oe the annual cost to operate the bulb.

  A 400-W computer (computer plus :pdsq.mr o)v07es 6ll: rq,l v/h0dmimonitor) is turned on 8.0 hours per day. If electricityo :m lpdi)v6sl7hm,vs0q ld: r0re/.q costs 10 cents per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electric bhi.f)ys a 99hu:z6lj 0b is,twill included the cost 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 ,h0fz.9aljthyw6 b: uis9si) did these items contribute to the cost of the monthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element 8i wmx vmh6 ld/ou m)+;,ioi.gin an electric drier operates on 240 V and generates heat at t/io+lhvwm,8m i ugmo6i )x.d ;he 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 through zl+ u3q*d,t/0 ooveow $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs 5,a5 8r9wafhpiv:x9gvvp 6ut $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% efrlot4tp1k e3qzbx 2fz 7/.a;mficiency. How much current does it draw fbqz z./pkxrt me;1 ol34t27 afrom a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power sy22ybatq;b9yh tp : 6rource. What rms current flows through this de29a q6yry2t:bh;t byp vice?

  A 500-W device is connected to a 120-V ac power source. What xvje +0m xxi6/peak current flows thro+i vxx6/ x0mjeugh this device?

  A 500-W device is connected to a 120-V ac power source. Wha7csz)o nc 9q b4/,re0sdp n8nok pf:m7t is the peak voltage asdnncqbe 7)8/0z,p:49m7 orpofknsc cross this device?

  The diameter of a copper wire is 0.081 inch. T,z j)e k0wwnqy8y- n;hhe maximum safe current it can carry (ikhq8 n, y) e-;0wwzyjnn order to prevent fire 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 $8.5 \times 10^{22}$.)