A device that produces electrgr5*skcym (6n 2m .m6hhp. auricity by transforming chemical energy into electrical energy is called n56g2 uk6h.m yr(*.mp hmrac sa

  A car battery

  The total amount of g ,re;td; wr(ccharge that passes through a wire's full cross section at any point per unit of time te,( ;w;rcg rdis referred to as

  The direction of convention current is taken to be the direction tha)vn8actk -bv5t

  A coulomb per second is the same akr1xs,6fvr1b: +bfrcf 0ax )y s

  Car batteries are rated in "amp-hours." Tz 33b5cbuduzn 9wv/dp1 p6kck5qld86his is a measure of their

  The resistance of a wire is84h2t7cp pf,x5o d;9y w b lqbsmir18m defined as

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

  The resistance of a wire iig s 5j*jr;x+a7*15gnrt vcius

  The resistivity of a on jie.uc84bjgvk8 2j6qzs3mj /4 3oi wire depends on

  Which conducting material ha44mr lkd;eck3 .d-g jb2 fafb9s the lowest resistivity value?

  Consider two copper wires. One has twice the length of the other. How do the fwpb0v24yrd az5(r8af7kd :t resistivities of these two wires d4 rfb rf0 k(pzva5:2 td8wya7compare?

  Consider two copper wires. One has twice the lengyzr,5vj8 j , m(;jumyoli:,zxth of the other. How do the resistances of these tj,l r y:jm m8 ,;zio(zyujx,v5wo wires compare?

  Consider two copper wires. One has twice the cross-se7bv q1kqtd7 3fctional area of the other. How do the resistances of these two wires c d3 fbk71qq7tvompare?

  Consider two copper wires. One has twice the length and twice thekajfuzos+i.s6 m8lj2+ r ud2 *xs6 vv7 cross-sectional area of the other. How do the resistances of these two wires compsmj8ufsjuv+ls6 x+6. azrki*od 22 v7are?

  The length of a wire is doubled and thetum xte1n/5/pkc,n6 k. vu5qc radius is doubled. By what factor does the resistance chan/tpn6/cu1 k 5vn5e ux tc.q,kmge?

  How much more resistance 7t owr)im 86rd)u j+ 9+mojlhbdoes a 1.0 cm diameter rod have compared to a 2.0 cm diameter rod of the same lengtmb87)ltdri6rj +m ohuwj+ )o9 h and made of the same material?

  The resistivity of most comm;jb ql68 6wblcon metals

  Negative temperature coefficients .ow;3ipl5: ei-jlgmiof resistivity

  What is 1 W equivalent1 2hm oj0al1 3trkar8r to?

  A kilowatt-hour is equivale/rswob+ lm (1int to

  If the resistance in2ll4l * 02srr+3l rvf grwt.ic a constant voltage circuit is doubled, the power dissipated by that cilrr l3twvc2rrlf4+.0*is l 2grcuit will

  If the voltage across a circuit of constant resiib:n5bha,ydk u(t2* istance is doubled, the power dissipateyhia5(b*, k n ibd:2tud by that circuit will

  If the resistance in a circuit with constant current flo tghaz yn;(;*xwing is doubled, the power dissipated by txyn;*az t(h g;hat circuit will

  If the current flowing through a circs,+gd a c9eo imee20,cuit of constant resistance is doubled, the power dissipated9m g,2 ie e+c,0eoacsd by that circuit will

  During a power demand, the vodwtt9b21f hm 4ltage output is reduced by 5.0%. By what percentage is the power on a resistor m142bwf9 dhtt affected?

  A current that is sinusoidal with respect to time is refewr8,-rxx m( y2z-noz irred to as

  Consider two copper wires each carrying a cxq(uqo y4o) 4xurrent of 3.0 A. One wire has twice the diameter of the other. The raty 4uq(oxxqo)4 io of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomes esshffxvw,*.4nhox6x. l entially zero at very low temperatures are refx4f.6,*xfx.wnv loh herred to as

  What current is flowi* avz65m7 av4+qfd jagng if 0.67 C of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatu2;.,k iq1vi/ry8di b8yudg sss in 2.0 min. What is the average currrisi;s2 v8u g.d1yi,k8bq /dy ent?

  How much charge mustle . uqd47o*yy 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 flowin5, j4y;pl.t ivl wac;zg 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 curreny d/ wwh9 5cuq/ uc02lfr5y;pct, has been left on for 10 min. What is the net number of electrons that haveph/wu;ur5 ccc9dy0qw 5 /2 fyl passed through the coffee maker?

  In an electroplating procesd vyz45 dlc7ck) )ogh,s, it is desired to deposit 40 mg 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 silver? (The silver ions are singly charged, andockvd)z4 d 7) hlygc5, the atomic weight of silver is 108.)

  What potential difference is required to cause 4.00 A to flow through a resi67l2ygo 7mwl5xb ,ngk stance 5yolwl 2 g,gb n7k6mx7of 330 W?

  What is the voltage across a 5.0-W resistor if the current through it is 5. *crs)uj, 6u)8lqiged0 A?

  A 4000-W resistor is connected aci)-i:bg9* uukir,p )/liovk j ):ugirross 220 V. What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is d:t rnc* mw(h9cca7c.* hf* /qyc rw6uits resistance?9:** tq(w6wr7c dy./ uccn* hma hccrf

  A 12-V battery is connected to a 100-W resistor. How many electrons flow thr d +en*q (xss5zfq6;dj6il 4qbough the wir iq 6d(5je6d+q ;f*q zsxns4ble in
1.0 min?

  What is the resistance of 1.0ih cy7v6,u;e /a+ffb g m copper wire of diameter 0.40 inch? (The resistivity of copper is f7 gu/,+ hy;ai6fcveb $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance og...y j5wlw ajf a circular rod 1.0 cm in diameter and 45 m long, if the resistiva 5g.wljy.j .wity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wvv/ 3xdnlh y4. d1asy;irtd() ire (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 bk8(pjwo 1gj3ff:cm w,s ;q*s(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, measures 0.040 o xcqjee;)hisn+-3 bx2hms. What is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge+2ijykb zwa7 a,xn13v (the radius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. (The resistivity of niz3j71kn yv2bx+aa, wichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 2;t.0ya9mposgm) ( xcu0 cm long and of rectangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carries 4000 A? (The resistivity of copper isyauc(x t09)ogs ; .mpm $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichrome wire has a radius of 0.- n rh ap.rgdo22tpo:850 mm 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 copper wire (re tl(*xl q lbm7 hs:lqu30pm08bsistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistr1h-pe;ip5kg0u*qrs 5 k 2fa bance 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 ofjhvj0 c eprjnb:b 9*76 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 )km cbnr +zq k-af8y+3u3w ,twindium. The resistance of the prmzw3y+k)awb,n8 q 3u+tf c-klatinum 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 throu8t/:5eysigkd gh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W.kz esl,7e(bo ) What current will it draw?

  A 150-W light bulb running on 110 V dowqw9te y 5/wk4vx 7(araws how much current?

  What is the nominal resistance of a 100-W light bulb designed to be4 6p3hve+8km b4ku dcnkgi +73le3mcn used in a 120-V cik8 g7v mn+c 3khpcmd364nl3u4ie keb+rcuit?

  A toaster is rated 800 W at 120 V. What is the resistanc0 af)g5c2t 0u1z1 utbqlku7 nge of its heating element?0 zbcg 75a110tntl 2q ufgkuu)

  A 200-W resistor is raterg.o ljje7w3, 7r rwa0d at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated at f(yb-. t+zf aczl)(nd$1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what current does is :e-, dq3cscnfwoy 6rnvq;+o(jj d 81t draw?

  A lamp uses a 150-W bulb. If(nvrft5dgm:6dee 5tzw/4 h z: it is used at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 f4mdo ozxn6.( 3jcj6o V. What is its resistance?

  How much does it cost to operate a 25-W soldering .75cpbcpvfnsu0)- .v kjlr+ e iron for 8.0 hours, if energy cocjs +5vvep r7fp)u -.nblck. 0sts $0.08/kWh?

  How much energy does a 100-W light bulb use in 8,qy0:vo*z9 fkjo bo)e .0 hours?

  A 1500-W heater is c u ) hi+(asv+2y)lhcen q9eta)onnected to a 120-V line for 2.0 hours. How much heat energy is prh+qh9 cl nsti))a+e()v2au eyoduced?

  A battery is rated at m3 (r37+kp,n mm)7fpdzhy 5bdfoflx 012 V and 160 A-h. How much energy does the battery store?d 5ml3 mk m+ f0)7y(bzr pffo7,p3dhxn

  How much energy does a 25-W soldering iron use in 8.0 hours?s hda*5pizv1. hxg((i

  A 100-W driveway light bulb is on 10 hours per day. dyo3d*zu 8d )vAssuming the power company charges 10 cents for each kilowatt-hour of electricity used, y o* ud38zd)dvestimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0 hours per day. If elet6dm x)biok.m +/aml,ctrici/m tml,k6b mi.+ do)axty costs 10 cents per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electric bill included the cost of running a central air-codxq(j .6de/ )k1+lvp+sy lnuonditioning unit fo/ k++(o6ydxuve1n lps.)dl qjr 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 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 generates he2 2 9sxxnoirokcb5(1sat 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 repair have on the power dissipated in the heating esk52x o2bcox snir(19lement?

  14 A of current flows tyq y1dcqm0m+ 4hrough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery cost,t k95* lqelezs $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% efj8 ctr-v6 8elrficiency. How much current does it draw from a 120-V line68j8tr e c-vlr? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. /b0pfopv/k9 pjj /s 6 vv5al8ll i:x(r What rms current flows throupxkl/b 5 f(ls086ajvov :/r 9ipv/lpjgh this device?

  A 500-W device is connected to a 120-V ac power source. Wh 3hd z9o;dvwhtm5i 663x:tp y7vh9 m1ieh/jbtat peak current flows through this device?/3:ei1vodhtx 5v669m y9zj twhh3mdhp ;b it7

  A 500-W device is connected to a 120-V ac power source. What is the p,s5p2qa 9x fk bx(x.ic /khb-eeak voltage across this device? 2,k q-ex(a.9bcxs 5hbpxif/k

  The diameter of a copper wire is 0.081 inch. The maximum s 2j g;rkn8t a)gg:gi+zafe 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 numbegjg) rig z:+;8agtnk2r of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)