A device that produces electricity by transforming cheme 2k .mg 7qnj)if;+amlical energy into electrical energy is ciqml+f ja 27mg e)k;n.alled a

  A car battery

  The total amount of charge that passes through a wire's fue, x :0ztpg6fa; crb0fll cross section at any point per unit0,6pcgf;bez taf x :0r of time is referred to as

  The direction of convention current is taken to be the direction thatae4or s 7fe3v-

  A coulomb per second is tobv nv5e 7ej5)he same as

  Car batteries are rated in "amp-hours." This is m7ooq9ci i)ah7d2f8 z a measure of their

  The resistance of a wire is defined a/mc6 0:kahmo:pd8r 9 zzh6q xrs

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

  The resistance of a wireo( m ksb6w3+ht is

  The resistivity of a wire depends/ic)2sfit q 7m on

  Which conducting material has the lowestf+i tj -su2+rp resistivity value?

  Consider two copper wires. Ol+d7fb8 ) gi 83t. n9jf0p0nidtsgnzgne has twice the length of the other. How do the resistivities of these two wires 8nd0b8ni d tpfgg . 0)nf3+l9sgij7ztcompare?

  Consider two copper wires. One has twice the length of the other. Ho- .5h;js lf .cysvdl-/3vqy iaw do the resistances of these v;jq vy / sla5lid-csf-y. h.3two wires compare?

  Consider two copper wires. One has twice the cross-sectional area of thr-2nbw m- ,rtke other. How do the resistances of these trk-,- rtmwn b2wo wires compare?

  Consider two copper wires. One has twice the length and twif5+zl h- vcm/etyfm3/ mg7xi6ce the cross-sectional area of the ov7mzfmyhcl36 /ex5 i +-fg/mtther. How do the resistances of these two wires compare?

  The length of a wire is doubled and the radius is doubled. By w3hfx, pjna8 ojywseh /1ac +:2hat factor does the re3sx 8ej:h /pcf12,oawha + nyjsistance change?

  How much more resistance does a ,dhuaen-c)17 as2sje 1.0 cm diameter rod have compared to a 2.0 cm diameter rod of the same length and made of the same materialu) 72ashja c1s,dee n-?

  The resistivity of most cuj*d; ni* 4fzzy 6pp2pommon metals

  Negative temperature ih/ek x*b+y3a2p:dn. l uowi7 coefficients of resistivity

  What is 1 W equivalentua1.+tcyuamf/6z h3l to?

  A kilowatt-hour is equivalp-rt3b/3 zwxt+.gg nxz. y0puent to

  If the resistance in a constantj6hiwh88ylmzz+5d / 4.azmvn voltage circuit is doubled, the power dissipated by that circuit wilmlzhdwh/ i5 a v68z+jz.m 48nyl

  If the voltage across a circuit of constant resistance is double pqca;+.r em41spn4.sp xgn )id, the power dissipated by that circu)e pxr+n4ai c.pqs;4sgm. n1pit will

  If the resistance in a circuit with constant current xu/( uqi3q2 (kia:plz flowing is doubled, the power dissipated b(ul/q3k puiq(a: izx2y that circuit will

  If the current flowing-dmpstu+:3cxkstk+ 0 through a circuit of constant resistance is doubled, the power dissipated by that circuikxtsd3+ umkc+:p0 t s-t will

  During a power demand, the voltage output is reduced by 5.addwf,rp5/7 r 0%. By what percentage is the power on a resfrrp, / 57wddaistor affected?

  A current that is sinusoidal with respect bk;cre0.wjmb( y, g3 xto time is referred to as

  Consider two copper wires each carryux 8q -cbo6h*2d vsh(iing 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 th *8uhbdscq62-ov ( hixe larger diameter wire is

  Materials in which the resistivity becomes ess/qkdoy) n96h6i 4(sczdccpk:wa( , wqentially zero at very low temperatures are referred cqk ackc:p 6y/qwhzndd(i,4o( 6 9ws)to as

  What current is flowing if -(8q 4 krrx glvlj86ln0.67 C of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparat -1kr2qs g5 i9m/yrpdmus in 2.0 min. What is the average curmp2-9mqr1 ik s ryg5d/rent?

  How much charge must)t(c g i61lkmh pass by a point in 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 8tql5z d-y.ohnbvi18(4czsa 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, whic7,):c)dmuo e5q-y pv w ;xuiohq1dt-m h draws 13.5 A of current, has been left on for 10 min. What is the net number of electrons that have passed through the coffee maq5 q7eoih1, uyw -mmv)otx :dp;d )c-uker?

  In an electroplating process, it is desired towpu)vaxcf+ un-) 526 geakii3 deposit 40 mg of silver on a metal part by using a current of 2.0 A. How long must thi- vpw6+c3) )xfni eg5uu k2aae 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 cau0axo m t2i+ue/6 s,rjrse 4.00 A to flow through a resistanc /r+suxma0rej 6o2i,t e of 330 W?

  What is the voltage across a p+z7 a2 swcc)1nmznmv;/+ qb i5.0-W resistor if the current through it is 5.0 A?

  A 4000-W resistor is connected tdd/03h g/iknnjbbp nrb,mm8* u7e:4 across 220 V. What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is mt2 f1y7ic-.uq-n bkyits resistance?ufc. yim k2q1- yb7t-n

  A 12-V battery is connected to a 100-W resil bkhut4gm6fvl +:5 0rstor. How many electrons flow througlu 5v6f mhrk+l 4gbt0:h the wire in
1.0 min?

  What is the resistance of 1.0 m copper wire of diam; qphb(i+lonk:e0 7o 60wagzs eter 0.40 inch? (The resistivity of co w6a kez;q sognb(00+7:po lihpper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in dia4bup(2 .1- pxlajcks /yux .zbmeter and 45 m long, if the resistixjul bkbcpz .p/x 1us- (4a.y2vity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (res g-fd4yvyv7 :( fd:hyfistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (resistivic fgcoe9njt:ji ffra +*q2 140ty $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 is it;5bch:m ryfc +s resistivity?

  Calculate the current through a 10.0-m long 22 gauge (the radius is 0.321 mm) n:o*tem00 kyjdrvx /w0 ichrome wire if it is connected to a 12.0-Vewk*v0/ m0d o0xry: jt battery. (The resistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and of rectangular z0a urzdw9g5qy442bscross-section, 1.0 cm x 2.0 cm. What is 45uwgrsqzz42 9ady0 bthe voltage drop 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 4b vp5l.lcff7mm 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 copp s :i+wluhhsbwi2 0:b7er 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 resista7jil: y4smtc tq*-+ri nce 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 ow.gn1v znh ,yrh;z1ex:y 5 s.pf 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 de.iv/iea9 p9h ktermine the melting point of indium. The resistance of the platih9p /a. 9ievkinum 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 thr2j9fb3taguwhv k1.3 5qc29 b1 ippdvfough an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What curreo ;)n: v4dfekff-nhq.nt will it draw?

  A 150-W light bulb running on 110 V dr1pko2 xjd9 fg).zv1mcaws how much current?

  What is the nominal resistance of a 100-W light bulb designed ter/vual aif tcn72-1;o be used in a 120-V circui i2f1 7aet uvrnc-l/a;t?

  A toaster is rated 800 W at 120 V. What is the resis4mhchx1+ *zn .p 08b hlqd+ks9iwkctu 5:jwj6tance of its heating elemenjw m t h6z db:+.s*hq4u5ckhjncl0w89x1+ pkit?

  A 200-W resistor is rated at k w);u yz r/gbw0da2+u$1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ral*mg*+t*k *5b e5vxuj yt6abl:l mwf(ted at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what currenc +v ojrolr32b 1:y5y gxak6k)t does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is its resby 1c(qr h+c8 l2wav-eistance?

  A 25-W soldering iron runs on 11yjz 4o7j:j secjm3vy- 2 rcw zl75l8p90 V. What is its resistance?

  How much does it cost to operate a 25-W soldering ir)kix*mnusp+: l)/y b su9cc;ion for 8.0 hours, if energy csus 9b/ u;cxyi)i*pk)mln+c :osts $0.08/kWh?

  How much energy does a 10qesh3lyy xe1qm ;0;w80-W light bulb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How muc)ud5o;+ozq;7w af e1iak h v5q,u3t qjh heat energy i+a1vqq ta)wf ,u;e 5o;u53jik7 zodhq s produced?

  A battery is rated at 12 V and 160 A-h. How much energy4eo8 kd1cb f2x does the battery store?d4 e1b2fo k8xc

  How much energy does a 25-W soldering iron use in 8.0 hou.du(;0i9cz( mhb ,r +vvbvkg ors?

  A 100-W driveway light bulb is on 10 hours per d(r jik k)vuw,7ay. Assuming the power company charges 10 cents for each kkkv )rju7i,w (ilowatt-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.h+kbm8f/ -9vhngh axl k k5)q* If electricity costs h5hx k ka/fmb9g )nh lk*q8-+v10 cents per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) elcvem s ka*88yrrv g+8j mx.m:j*k-i 6gectric 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 imy.:gmc *g8j jv-k8e*sm+k v6irr8axtems 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 a ge(5r;i9exp r t(k)iv s:f0ljnd 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 de0;r gp rk i()j9(vfxle5:stiepend on its temperature.) What effect will the repair have on the power dissipated in the heating element?

  14 A of current flowzuyerbrch; j bvf 3l+ a,l58p8 28dd)os 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 .r.7w. ;w njm/dh yh9off8fa ; lqc.wt$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 ;: fpco5m; dd,+cos5 0y 7hgym ly-s/cqy+qsp hp has 60% efficiency. How much current does it draw f0+op sdf smh+ /;7 q:c mocydcylqg;sy5,yp- 5rom a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What oe-w 4q/wyuw1(p(d ghrms current flows throwqd-wh (1 upg4wy oe(/ugh this device?

  A 500-W device is conne.)6m;z w5 b ) dypyaxev8cexh4cted to a 120-V ac power source. What peak current flows through xw4 y5be)vm)8zah 6.cpd yex; this device?

  A 500-W device is connected to a 120-V ac power source. What is the pear 9agd; y h *p*r6bzwy:jb.4 l,busu6nk voltage across this debr*hu6r bjg zdylb,uw yp;n:*a s4 .69vice?

  The diameter of a copper wire is 0.0 z9q/7 z sj,fu:mng(gn81 inch. The maximum safe current it can carry (in order to prevent fire danger in building consj7mf,/nszn9uqg(g z: truction) 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 $8.5 \times 10^{22}$.)