A device that produces electricity by transforming chemical energy in :zo7ah w8)i/fir -nufcw v2z8to electrical energy ia)c7z -niz8f ruo:w/f8i h2vw s called a

  A car battery

  The total amount of charge that passes through a wire's fn 6xsgz m/2f0rull cross section at any point per unit of time is sm f x60rngz2/referred to as

  The direction of convention current is taken to be the direction ydj9 0x -l2i:ll7ctfrthat

  A coulomb per second is the sam ;h ya-,;mkxxakk +9r3:u-pniv hjx,re as

  Car batteries are rated in "amp-hours." j4 v6c;s:g:jcj.ijdbv ,flj5 This is a measure of their

  The resistance of a wire is definedsb7n; .hn pko) ::dvli as

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

  The resistance of a wire elsx4lzjcpv)od oj4i8/ss63 6p; 0m ais

  The resistivity of a vo( e a k3qhmo+7w(t ix4hbxn)+yr5z2wire depends on

  Which conducting material has the lowest resistivit:t 50z mv qzpuzv33kn:y value?

  Consider two copper wi;py6n4xe1ju1 p r0 snimo kmqj34h25ares. One has twice the length of the other. How do the resistivities of these;4mh j1mopj05x12 ie63pny qk4ansr u two wires compare?

  Consider two copper wires. One has twice t2isx c3h7 ; b8egvszjivnp1(s382kelhe length of the other. How do the resistances of j x1pnzklivcv23 si8 7;3s(sbh2 8geethese two wires compare?

  Consider two copper wires. One has twice the cross-sectional r o:-s1 y qhw +kgor9kl6:f8pyarea of the other. How do the resistances of th9k6y+lr- oks:p8:fgoqh r w1yese two wires compare?

  Consider two copper wires. One has twice the length and twice the cross-sm q8. jt.vmi xx3jd609zg0 ljtectional area of the other. How do the resistances of these two wires com.gjit mtz3dq vlmj 0j80 x69.xpare?

  The length of a wire is doubled and the radius is doubled. Bm9xng5 b,eh) )6w0 j/b /jeui*gdpntly what factor does tnj,ej/ein)/t b 6updl g 9b*0xghm )5whe resistance change?

  How much more resistance does a 1.0 cm diameter rod have compared to al hydf1:(0km2;0)l/4 a wkassst wrvz 2.0 cm diameter rod of the same length rlmwf a0st4d1 /y0as)l 2vzk:khw(;sand made of the same material?

  The resistivity of most .ou 6w1p9ohbb common metals

  Negative temperature coefficients of resistiy) pd +4a+lqur4yao9 ivity

  What is 1 W equivalent hf*f /m zofse p,e 0pq6,-eewvn5n).qto?

  A kilowatt-hour is equivalen7rz/,6lq ew8 gy1zgeft to

  If the resistance in a con62 rfx7fy fpj.stant voltage circuit is doubled, the power dissipated by that circuit wilfr x72ff6j yp.l

  If the voltage across a circuit of consts7b,4recy 1xe cwwt1mv, k.g7t;r p 1sant resistance is doubled, the power dissipated by that ci71 t47kscwr; v r. ,xb1cmegs1wtpe,yrcuit will

  If the resistance in a circuit with constant current flowing is doubled, the jawyq3wx )0(nor(7vb22h kbh power dissipated by that circqy 2(0(hjkh73a2wonbvr)wxbuit will

  If the current flowing through a circuit of cdm5x:79g+ h9 hjqas5f ur) qiaonstant resistance is doubled, the power dissipated by that circuit wil:fax5q) h5j rghq +i9md s7au9l

  During a power demand, the voltage output is reducedldkv,jwd63 t; by 5.0%. By what percentage is the power on a resistor affecddj k;,twl v63ted?

  A current that is sinusoidal with respect to wed4y.yd,/2fax5 b mptime is referred to as

  Consider two copper wires each car(-l,kpzmo(*+0pcsucoh z-f ed t 4e3r rying a current of 3.0 A. One wire has twice the diameter of the other. The ratio of (3h sodku- -0zcotrle p 4 fpe(+cz*m,the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomes essentially zero at very low temperi -/w p);mfctbatpt)mcf -/i ;wbures are referred to as

  What current is flowip;yt2plr 42jq b*si. mng if 0.67 C of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplatieo2g 2gqag9bkq3n 1nd/ w2x7nng apparatus in 2.0 min. What is the av9wng 72onk22qae/qb3gg nd 1xerage current?

  How much charge must pass by a point in 10 s forl gsh5t+nv, o7 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 flowingy1:twf0-khakc :, y sb 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 curr:.p / ckbu6mgby( 058z bwfpsment, has been left on for 10 min. What is the net number of electrons that have ( g5bzk: pfuc s.pbymw0m/8 b6passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg-(6qyjgke a *6pp, q zb9pcjd. of silver 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 bjj.a*6- yzpp, 6dkqqpegc9 ( 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 flow througx yd28edz z;8d5 +yj6raeb;w ah a resistance wzj z d8 2r6y;e+x5aydda;b8eof 330 W?

  What is the voltage across a 5.0-W resistor if the current throug gs11 z9j/ba45ooajzl h it is 5.0 A?

  A 4000-W resistor is connected across 220 V. Whatjh3(p0eo3s fag uz h: g0hf;4c current will flow?

  A light bulb operating at 110 V 78ad (ip ncg8mdraws 1.40 A of current. What is its resistanceia7mpn(c8 dg8 ?

  A 12-V battery is con ;i-3+cac czh f2h0)d:abbwp wnected to a 100-W resistor. How many electrons flow througwfdc2achhw+ 0)izpc3;-a :bbh the wire in
1.0 min?

  What is the resistance of 1.0 m leqhvd:/z h23a ui0+w:kmfy; copper wire of diameter 0.40 inch? (The resistivity of co2hv 3/k;fzm:eyda+ uh:q ilw0pper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a ciok;ve7,lut e/y q 8vf-rcular rod 1.0 cm in diameter and 45 m long, if the resistivity 8ytvle/;,veu-qo7 fk is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wiv ozi*)ud oicrp ;a.22+bnoj k(fqp 16re (resistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (r3.p.o xdzk4r8r9 ln6ic rszm5esistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 m long, mepwfl gfn (o6s kumwy1rpqoa6y6 6*;-4si pi:1asures 0.040 ohms. What is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge (the .yeurm w0 +s+cradius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. (The resistivity of nichrome r e swcmu0+y.+is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and of reclkt5a2atm./l tangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop alongk l.la/2mt at5 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 andzfbb6lkpen:cjf(+o k 5 u/z,1 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 copp8cckc f+)-vaejas v0x2 4vwf* er 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 a resv h;tbxgf+77 vistance 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 coefficienp ,pjc/(ly*gl)4 fxth q *9ispt of 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. fzw sh6v6xa4p 2)nm4aqz8oyms z3m84The resistance of the plv ) q6mp 82mhwz8osxfm4nzz4 ys a46a3atinum 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 ;s0ai3v2+t r kf pgu 8(m0xrfe$10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current*plk r 3l2aoha*c0xr/ will it draw?

  A 150-W light bulb run,qwf8c jyi g69bce )3,pxis0 uning on 110 V draws how much current?

  What is the nominal resi)q zlenrdwtm-y n, 4v4h w(-m.stance of a 100-W light bulb designed to be used in a 120-V -m.m,e (rq)-dht44lz yv wnwncircuit?

  A toaster is rated 800 W at 120 V. What is the resistance of its heating el0 kyraqcvn ()4ementkn4( c)qv0ray ?

  A 200-W resistor is +r hd :/fo(ndorated at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is r -15me zv bm3.olltlx3ated at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. y7jv .egnphn7 y3 io/qs 77j7z If it is used at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is its res 4qn 3-utcydm (o;jztbl95 m-distance?

  A 25-W soldering iron runs on 110 V. What is its r zy1l:( b9brfd8eht3i esistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours, uiw/jql x4u /;s /8rhww/d xmy3)a gg:if energy costs /3gaiw/l h r:/;8dsuq4 x)ygmw/ujwx $0.08/kWh?

  How much energy does a 100-W light r)9f gxtydbs:r2 ik(;i0 .atgnr n:9qbulb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 h9*/ ii +ydccexours. How much heat energy is produced?/ixide+9cy* c

  A battery is rated akzq,cq mj37msk-( 9 ast 12 V and 160 A-h. How much energy does the battery store? m -s7z 3,(qsmckjqa9k

  How much energy does a z/d4y:bsncqrvdn.1(8ur*h ,h6t ii m25-W soldering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming the power comyiipm/h)/ ) iht s8-gbpany charges 10 cents for e ybmh) //8ig)pstii -hach 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. I m.+;u*r k8zilpcz x5wf electricity costs 10 cents per kWh, how much does it cost zki .;5urpl+*wmx8czto run the computer annually?

  The monthly (30 days) electric bill included the cost of xwx3nqv9,; r prunning a central air-conditioning unit for 2.0 hr/day at 5000 W, and a series connection of ten 60 W light bulbs 3vx ,wprxqn9;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 gegq+6ulrj kujo5 x-;c,nerates heat at the rate of 2.1 kW. The heating element shorts out ajc6rgo5ku;ul x-,j q+nd, 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 t 09dki c);)ssrov 2:tyky3vlk hrough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs kus;+se*l-wpzi/ ym- $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 a2rvugl- iu+.rg4st b( t the rate of 2.0 hp has 60% efficiency. How much current does it draw fr-tg.g s4r( l2+ui ruvbom a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. 0ofjm rtsyq4s i - wz6pi/: 1*.p6wnhkWhat rms current flows throqwfsr / 4: *k61pwoy6 znii.phj0- mtsugh this device?

  A 500-W device is connected to a 120-V ac power source. What peak curren un5m*q /5kr)ns aos9vt flows ths)un s ma5k /n5r*o9qvrough this device?

  A 500-W device is connected to a 120-V ac power source. What is the peak voltagmq+wj ;h*c an0e across mqhn+*0 cw ;ajthis device?

  The diameter of a copper wire is 0.081 inch. Tnb *am b7l0ma2he maximum safe current it can carry (in 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 elmn7*bm0b2la aectron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)