A device that produces electricity by transjfl)bhelq9ql0it+ * 6 8z51k:gwxunuforming chemical energy into electrical energy is calledl w +5 klqx9ti0u h:zjnu18e)bgflq6* a

  A car battery

  The total amount of c6xvw48o(jbya)u8 )o 6pod;qja7;rib r)dpz d harge that passes through a wire's full cross section at any point per unit of time is referd48u(aoq6;p d8brjv6wo;) jpz )bd i7y x)oarred to as

  The direction of con-hw)xv- 9ac qjk+h1*wjc e5phvention current is taken to be the direction that

  A coulomb per second is the same asta0c( (3j6boznfh sd)

  Car batteries are rateda4uk6bdn +yshy;.b pal*e d:4 in "amp-hours." This is a measure of their

  The resistance of a wire is defij a:2y /gmtom9xa tsi485qx. c:m9pgzned as

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

  The resistance of a ) k,jxlag6j. -ahos+bwire is

  The resistivity of a wire depends i0d6 z9ixjs2q on

  Which conducting material has the lowest resistivitnhqo* 0uwn c:+y value?

  Consider two copper wires. One has twice:glyqa, n oq)lk000q i nf0)eu the length of the other. How do the resistivitie qkni,)yefa00q: u gnlq) l00os of these two wires compare?

  Consider two copper wires. One has twijjzyrx99l) v t r s)x84nk0mq)ce the length of the other. How do the resxjz4t8 0rjsrlmn9kxv )q)) y9istances of these two wires compare?

  Consider two copper wires. aes*+kuxt/ po*l7 )le One has twice the cross-sectional area of the other. How do the resistances of these two wires compare?)*k+esta *u7 ole/p lx

  Consider two copper wires. One has twice the length and twice the cro4eoj pe .xq3o6c4;dio ss-sectional area of the other. How doce;3eoq.ox 44p 6dioj the resistances of these two wires compare?

  The length of a wire is doubled and the radius is dolpj: +i 5;c.iqilc1 /noku+ghubled. By what factor does the resistance c li1u ;qh5+cc/i+: ipojlk.ng hange?

  How much more resistance does a 1.0 cm diameter rod have compared to ar,v2so-vl9)a 8 mi5b a4ndv lx 2.0 cm diameter rod8lv vb xi 4)ad5avm9,-rl2 sno of the same length and made of the same material?

  The resistivity of most common metafc qtr/jfdp52b/ hm/j1x;aufz*l ; d/ ls

  Negative temperature coefficients of ri adcb7 ,/zm,fesistivity

  What is 1 W equivale1 0y lysgv57kznt to?

  A kilowatt-hour is equ3v zb l16krfh8ivalent to

  If the resistance in a constant voltage circuit is douo 4z;vh 5/zdbdbled, the power dissipated by that circuit5/vz;z o 4bddh will

  If the voltage across a circuit of constant resistance is doubled, the power dip2c* 5na d)xcussipated by that circuu*cp 2na5d )cxit will

  If the resistance in a circuit with conwukia 3 6wkfs.8s).txstant current flowing is doubled, the power dissipated by that circ.kus s3)f t 6xwwk8.iauit will

  If the current flowing through a circuit of constant rese xkw7p/mq h33istance is doubled, the power q w/mpe xk73h3dissipated by that circuit will

  During a power demand, the voltage output is reduced by 5.0%. y 4mvi6:7d(pzka xny3 By what percentage is the pom :4a7knd yyi (v6pz3xwer on a resistor affected?

  A current that is sinusoidal with respect to time i-; . qgmsd zpqyqu1qy8xaz5-q99xg q;s referred to as

  Consider two copper wires each carrying a current of 3.0 A. One wiremck 7;ee8c* 68:vf7jlnywp 8i :x lgdx has twice the diameter of the other. The ratio of the drift velocity in the smaller diameter wire to thdmi vekn7 w xlcc;88f :6l:8*yp 7gxejat in the larger diameter wire is

  Materials in which the resistivity becomes essentially z p 4p-fwn+es3f7g/ fuaero at very low temperatures are referref-f7sep waug/4p n +f3d to as

  What current is flowin.qkzaj e+-v u3g if 0.67 C of charge pass a point in 0.30 s?

  A charge of 12 C passes throsk6e u+t.t :8uwccw / )k-ti3wj0yvkhugh an electroplating apparatus in 2.0 min. What is the average currw vk6/-8j0ktt :th+ ue.)ykwc ciw3su ent?

  How much charge must pass by a point ie0ug cd)n 27 eq3q6yzfn 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 flowing glir82 go-/yynkj b/. 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 de/14gwt9i kg16) oukc us:s gtraws 13.5 A of current, has been left on for 10 min. What iss u9 1ko)k u6s:e4ci ttgggw1/ the net number of electrons that have passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg of silver on a m27 /haqfc ;w45wrginbzinc 1-etal 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 ato7wc 1; c/q5gnri-hi 4b2waf znmic weight of silver is 108.)

  What potential difference is rcn((nrw 3 a m,gtj-2yami 7h+yul1p+fequired to cause 4.00 A to flow through a resistance of 330 (f+nt y(pry,gn3-la a+ 2m17uichw mjW?

  What is the voltage across a 5.0-W resistivtxor6mexx79jj(zfg;2w(km*vd hi /u5- n ;or if the current through it is 5.0 A?

  A 4000-W resistor is connected ac *,0rj*tpa tkyross 220 V. What current will flow?

  A light bulb operating at 110 V draws bmc:3e75 z zpx*zet8 a1.40 A of current. What is its resistance?:aez7c z* 8t35mzpxeb

  A 12-V battery is connected to a 100-W resistor. How many electrons flowmmv ohnstr)da :9f;aej 4 ;9l4 throug;9ja l4dft9va4 sm;:mor)hn eh the wire in
1.0 min?

  What is the resistance of 1.0 m copper wirjlck311gje xnx z; (eex4o96lj(wl+2eu+ ux fe of diameter 0.40 inch? (The resistivity of c(zjxl ;elxc+43(j1kle 6e1ufujxe2+9nogw x opper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a p6udk ml/ rf3tmpy 9;68 g7)pj-fllhccircular rod 1.0 cm in diameter and 45 m long, if the resisti6yfg flju ml78tp prm c3k-p/9 dlh6);vity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper)dvtcx7 *k u-s wire (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 wireg/ d(wa4vgipq-wff+v4 f-p1y (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, measuresh *lqco9g-k j*lvgtdc2 0d5i8 0.040 ohms. What is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge (the ,mqel:t7 c pv*radius is 0.321 mm) nichromevq7te:* ,cpl m wire if 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 cross-section, 1.0 cm x 2.0 c2n;x96yf( cxiot j42wg iwls7 m. What is the voltage drop along its length when it carr9wx(f 22x s4g6ylinwcoj;t7 iies 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 agaf16s4-i2b bevwi-34 bsli ft yz :d, 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 coppj-ntxmiu5yp +) x j08fer 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*yqyfcx;g h2zj l-m-*s2 pc6 q 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 of platinum iso kr4)1ja2jr sirkf oop 3y e0j56ul1. $3.9 \times 10^{-3} /^{\circ}C$. 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+r-y/vb c (pb.5oz,)sttrcmq resistance of the platinum wivr/qy)tc.bb5 po cz+ (mstr-, re 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 througwl4 3-vv ;gm l:r:txx:uya hl9h an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What curr 21f u. aosem8. 6dtde8qnbi,aent will it draw?

  A 150-W light bulb running on 110 V draws how much rf+efkz7bw*(8w2 qvdcl j(s+tc2 wu9current?

  What is the nominal resistance of a 100-W light bulb designed (x1yah znl bea 42gpud*3fm(9to be used in a 120-a1nfhdmzp4y3l2 *auxb (( e9 gV circuit?

  A toaster is rated 800 W at 120 V. What i,dr+n:jds2od)oo r: is the resistance of its heating element?idr rod+ oj:dn)s,2:o

  A 200-W resistor is rx9 5,;l adj35mvcum urated at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated at t,p0 6ntzpfv639j7x3x w1 b mewra3 fo$1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V,77.derfauw:n54qk 4ixpds(; pwf hy6 what current does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is its reg nzxgog( n/2ipvt) 1,sistance?

  A 25-W soldering iron runs on 110 V. What is its re7s9 a(gn qfb1 xohe9g+sistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours, i2e+gsxy mfog)j0 1rt: f energy costy2:jfg+mo0)rge 1 sx ts $0.08/kWh?

  How much energy does a 100-W light bu*:p7n okr7knq/buo (wgfmsz 6-2w8 holb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much heat ed b 52)f i)1ho/hklbvenergy is produce) i/d5hflvkeb1 ohb2) d?

  A battery is rated at 12 V and k7zolszhs,i28axt6( 160 A-h. How much energy does the battery store?z2l o8 s,7sx( 6zaihkt

  How much energy does a 25--sk s- pcw.hqi9: yb87l:uixyW soldering iron use in 8.0 hours?

  A 100-W driveway light bu jqdw,di6li t a;v1z*-lb is on 10 hours per day. Assuming the power company charges 10 cents for each k- wvd, i1;j*6zti qaldilowatt-hour of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computo4s*r3y/kr289g ra ykab1wfger 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 ann bk1sr frogrk9y wy2g4*38a /aually?

  The monthly (30 days) electric bill included thbjdiqk :. 9vr+e 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 items cobr q:k9v.jdi+ntribute to the cost of the monthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element in an ele z6:-h. zvs s.;/mzotfa egh-cctric 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 re;6-o hva- .ctmzzgz.e h:/ sfspair have on the power dissipated in the heating element?

  14 A of current flows throurgz )qs-(v -s(xjo1nz0okoy1akv5(*w7 rra hgh $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costwbmgb5 hk/ (.ks $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 t2n2kr r dv-9yqhe rate of 2.0 hp has 60% efficiency. How much current does it draw from a 120-V line? (rq2-vk9d2yrn $1 \; hp = 746 \; W$)

  A 500-W device is connected3pnup:e 23nf)g 0ba ri to a 120-V ac power source. What rms current flows throri3ng3afepun) :b 2 0pugh this device?

  A 500-W device is connected to a 120-V ac power source. What perar++;8r2atkd q) zgx+/fqavak current flows through txakd2 r+t+;q8+g rvfaq)arz/ his device?

  A 500-W device is connected to a 12 2s)q rvwnh,:i0-V ac power source. What is the peak voltage across thi2 r:sh,)ivqwn s device?

  The diameter of a copper wire is 0.081 inch. The maximum safe current itv1 ld 1ln13yf96z qtli can carry (in order to prevent fire danger in building construction) is 20 A. At this d3l 1vny1z lq69lit1f current, what is the drift velocity of the electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)