A device that produces electricity by tran 1 l/dz. lbhme o.8xupwp+je9/sforming chemical energy into electrical energy is /p .mu9b 1 8wjxohl/+eepzd.l called a

  A car battery

  The total amount of charge that passes through a wire's full cross s erq+2/wbq7v hv;2 , a za3;q))cuau:eycykesection at any point per ak; see:+qvz wyah/)u b) ;3c7urcv ea 2q,y2qunit of time is referred to as

  The direction of convention5t e0 pukvk3w3 i7m8m 8vjg2cd current is taken to be the direction that

  A coulomb per second is gk . :+ratuj*/vk,ww uthe same as

  Car batteries are rated in "amp-hours." This ikz avsh* x0vwom xux yg57s:2tn6z:sx)*62 lws a measure of their

  The resistance of a wire is def 5vn//y2 k zpetb y7zte4m+c9zined as

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

  The resistance of a wimv-f+)ff( qyigu s(5t re is

  The resistivity of a wb,uwa;,sdpf tbe/a b82t if: :ire depends on

  Which conducting material has the lowest k8 nt* ba:;mp.qg9bn iresistivity value?

  Consider two copper wires. One has twice the l+tj gn-n+ ruafj o6tl/vj17i2ength of the other. How do the resistivities of thtuta jfjg+n1-lroji+ v n2 /76ese two wires compare?

  Consider two copper wires. One u f4j)55dy .tm3cgnxiw e6su9pl -j:+gr0dishas twice the length of the other. How do the resistance:4it5 ip+dgc5 rmj n d0lu9fs u)-jgy6 .3xwses of these two wires compare?

  Consider two copper wires. One ha,3f kex3kyvm klt.cqjik*9 *. s twice the cross-sectional area of the other. .*ekm,i.lkk9 xqty*fk v 3c 3jHow do the resistances of these two wires compare?

  Consider two copper wires. One has twice the length and twice (z2 w.izz :dw x/mf2dym;fg*jthe cross-sectional area of the other. How do the resistances of thesfjf:z2xm ig ;2(w/. zdzwmd *ye two wires compare?

  The length of a wire is doubled and the radius is doubled. By what kpv qvn: 1* pdl zgxe;94u4qeyac j0*7factor does the resista 9 je0yqv4 ;l74un*qeg pd pvczk:*xa1nce change?

  How much more resistance does a 1.0 b;-6ejchd -:kx vdve0 cm diameter rod have compared to a 2.0 cm diameterxbdcv:ed-hvk0 6j ;e- rod of the same length and made of the same material?

  The resistivity of mym9h8cb f i(z7ityi1g++6m 7g 5k.vm wobqn+lost common metals

  Negative temperature coefficientk y/md j*)y+gys of resistivity

  What is 1 W equivalentnc5d6(k 8/5at4 hbe ri sde-ml to?

  A kilowatt-hour is equivaleem8xs:ag 2yu cv3xr2jzn4 p *1z *8ujhnt to

  If the resistance in a constant voltage circuit is doubled, the power dissipqv; tb l.eir2+vo+ yu:ated by that circuit wiv;yl:+o.ub 2v+t r qeill

  If the voltage across a circuit of constant resistance is doubled, the pow o )e j/g7;kw4 dnyz;cq*1wiower dissgkjz e;icdywo;w)1* qw 7/4onipated by that circuit will

  If the resistance in a circuit with constant current flowing is doubled, thecp2) 0jv ew m14t:;kyhr jyv+j power dissip:4yjwe1kv; v jrp) m hj2y0c+tated by that circuit will

  If the current flowing thrrtly +x z q877le+yzb4ough a circuit of constant resistance is doubled, the po zlxy4+b+8ez7tly 7qrwer dissipated by that circuit will

  During a power demand, the voltage outg3rjh7/3euzs8xk2l p put is reduced by 5.0%. By what percentage is the u 7hz 3s8lj/2xg 3rekppower on a resistor affected?

  A current that is sinus-kuz)c ewoqf0m: nat jbo* 6i;g8kmz1v.gd;3oidal with respect to time is referred to as

  Consider two copper wires each carrying a current of 3.0 A. One wire q r1mk62ij8oy has twice the diameter of the ojyk qri18m62o ther. The ratio of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becobq0 ,xm tz cr7fs5j3a:mes essentially zero at very low temperatures are referred to sq0rm,aztxj7cb f35: as

  What current is flowing if 0.67 C of charge pass a/2ypz/waf:2g zn8 beuh c:s2g point in 0.30 s?

  A charge of 12 C passes through an d 2lb 8qwa:rbs 76t+jrf1s;nhelectroplating apparatus in 2.0 min. What is thssdbr6712bl +;f jhqt anwr:8e average current?

  How much charge must pass by a point in 10 s for the current to be 0.50 A?ox 60j5 (pow;p en09swd4gzol

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

  What current is flowing if 88np88u vxl xjjmp;v($4.0 \times 10^{16} \; electrons$ 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 been left on for 10 min. g:73-n f9 nkl0yncoa -:voke q What is the net number of electrons that have passed through the cof c:o :ka30kefgo - 79ln-nqnvyfee maker?

  In an electroplating process, it is desired to deposit 40 mg of silver on a met qauk;*0rit 7r);fwiyhv .p g,al 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 ions7;;ft iqy)rwh,au. p vi k0*rg are singly charged, and the atomic weight of silver is 108.)

  What potential differe4s9gg1y/(uahs :e9a z zk9vegnce is required to cause 4.00 A to flow through a resistance of 330 W?19 /ss (zg:eu av9eh9k4agyg z

  What is the voltage across a 5.0-W resistor if the current through it ife 5vh l4dhph;(ut/-zs 5.0 A?

  A 4000-W resistor is connected across 220 V.yh ;x-dy:7i(2 reibf3;6ceb .dj ybht What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its resi6u fdz gxt/y6p qq24:hstanceyfd px4q:/g u q6z6ht2?

  A 12-V battery is connected to a 100-W resistor. How maf0y6c5 )clvvv /b ng,bny electrons flow through the w,lg c bv0n5v)fyvc6 /bire in
1.0 min?

  What is the resistance of 1.0 m copper wire oshrre(0etrf*i 5x m/,k6/s+iqny s6 pf diameter 0.40 inch? (The resistivity o/ys(t pk,6x 605fhmn ies+re*r sq ir/f copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm6x,xys57smu xw( o emx2c)rv ; in diameter and 45 m long, if the resm,ues 6(xxxmrxosy 25)v7;c w istivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wib)q4gm)c l(,v6wx le ere (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 (ressw ji-il p *+k9zlv.*nistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 m long, measurenv)w 6 :gxa-cde sqpe-/2rj q)s 0.040 ohms. What is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge (thet 4 .ph e .4c0fbydp:+botfg/q radius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. (The resistivity of h4p/pc :.yot 4e + fbq0fbtdg.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 2.0pn4 pgxpldaygiyu 5y /b-*)7/ cm. What is the voltage drop along its length when it carries 4000 A? (The resisti iuyaylp-)b7 gn p d*x5/y/p4gvity 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 r5 njii(9l hf tp-1i gy3qnu0e+esistivity 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 (resistivipg i+8n 2qa/xnty $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor hamzq;ir6 e(vhgvfg +0. s a 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 resistivity hjtk8a kp*sq5dj s).)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 determinuj bqpkn i8c6xl6 ,iq;vgj*9 8e the melting point of indium. The resistance of the pl ux9*p;kicgl i b66q8,nvjj8qatinum 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 +cvx49z9xr/j0n rktk an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What curre0k lyowi.f*wo /eo3b4h33a zob z5(s knt will it draw?

  A 150-W light bulb running on 110 V draws hz v; vzt)ry ;. 5tanbc0y 0(i*f7lvpwuow much current?

  What is the nominal resistance of a 100-W light buz y239w 4pmczvlb designed to be used in a 120-V circui3 cw29vzm py4zt?

  A toaster is rated 800 W at 120 V. What is the resistance of its;.ord1tqc6; s uko;p:li 9w ts heating elementdq.9s;;ul6os cp;ro:t k1twi?

  A 200-W resistor is /tg +h9)me,5ybp x sxhb gg1h/rated at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ey2iepl9. :j brated at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bu;,lqj,; qke , b qb932rzk5 lv/lqpktrlb. If it is used at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it is u u+t)t;9ldjw- lory 6vsed at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What is itzif7 rb2m4i py cqj+d6h. 0sf-s resistance?

  How much does it cost to operate a 25-W soldering iron for 8k19(bzz cp 0 /z i89zxq6cbpee.0 hours, if energy cbeic8c(pzz0b1 /kpe 99zzxq6osts $0.08/kWh?

  How much energy does a 100-W light bulbfg j kk -xpig i(v0+3ut7n*d(s use in 8.0 hours?

  A 1500-W heater is connected tdi : .dwganc4h;y) 8txo a 120-V line for 2.0 hours. How much heat energy is produce;dw8 : yx i4ntcd.gah)d?

  A battery is rated at 12 V and 160 A-h. How much r irzj5r;xnh0f,o x 3-nqlu:*energy does the battery store?,nrfqx 3 z-ru:rh0n;i*xo 5 lj

  How much energy does a 25-W soldering iron use in 8.0 hdzov 4,l5taj,ours?

  A 100-W driveway light bulb is on 10 hours per day. Assumin3-pq5orxg1+vv ( hs b0seqtl;g the power company charges 10 cents for eachl+5vv30hsrsxg 1 ;pqo-q(b et kilowatt-hour of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.q +r3 awgr:+sh4gsm f.0 hours per day. If electricity costs 10 s.r++:4hrm 3wgfsgaq cents per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) elect5f8 al1t aq;ahric bill 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 did these items5 hfaaq;8 1lat contribute to the cost of the monthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element in)(n8qn1 su ix4:./vvirfxg cw an electric drier operates on 240 V and generates heat at the rate of 2.1 kW. The heating element shorts out an scwnnu (g/r qvixx4i8v1:). fd, 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 oyj - +x7b3 ; qwu:j+3uxfubjnthrough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costsyv5dgo4ri;*i:p ;n gpe : gh;j $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 haseqv9c6 n +q2ms 60% efficiency. How much current doqn m96+cesqv2es it draw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. Wwl3e n04lle yet5 wur +:fl/w9hat rms current flows through this dev9t+r5fy30en wwllll/ eu: 4w eice?

  A 500-W device is connected to a 120-V ac )z epctp7ak*r0v4 (sl power source. What peak current flows throughcl7(tpa0 pk)4*szr ev this device?

  A 500-W device is connected to a 120-V ac powey.m62uaj7i65 n:t7*y zp+w qa icolj p4uld:vr source. What is the peak voltage across this deviiw:ui l*u4 y qco nmvl+.p2td 765ap:7zjya j6ce?

  The diameter of a copper wire is 0.081 inch. The maximum safe current it)(ok qhkxi r80 can carry hri xo)kk( 80q(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 electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)