A device that produces electl8 ,fs/+9a-su3ncocv u nii7bw( + xuqricity by transforming chemical energy into electrical energy is callx +iub 98 lc+3-q /a(wso,sin cfnu7uved a

  A car battery

  The total amount of charge that passes through :odhbp-g66;rg4h yw la wire's full cross section at any point per unit of time id6gh w y pb-6o4:rhg;ls referred to as

  The direction of convention current is t4/6j5 ;anqj twqi;itotw5kj 1 aken to be the direction that

  A coulomb per second is the samjeog g:, g9z ; 6b oke8dzf7dvdac)n*3e as

  Car batteries are rated in t(x ayww4r6 qddl*-t;"amp-hours." This is a measure of their

  The resistance of a wrqai hiu12 +(oire is defined as

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

  The resistance of a wire is*mu t9v6x;nuq f.oj +d

  The resistivity of a wire depea4h h2(nc wkc/ kwfp)dz1/x)onds on

  Which conducting material has the lowest rdsya 3i2kybn g4gh:5lef5 0/tesistivity value?

  Consider two copper wires. One has twice the length of t: -trm + gtj4pavu*7bshe other. How do the resisgj brt mt 4+sap-:vu*7tivities of these two wires compare?

  Consider two copper wires. One has tdp i k hz0,x7mju.9t/ewice the length of the other. How do the resistances of thesk./e7t,uz90 ipxjmhde two wires compare?

  Consider two copper wires. One has twice the cross-sectional area of the other.;hod57zl eg,5 ,(hxace9 ukmo How do the resistances of these two wires compar,h(a9cgk5e75xuzo, o deh;mle?

  Consider two copper wires. One has twice the length and twicpf4sv-8fxzb/ t ro4n( l8,tg. losh0 ke the cross-sectional area of the other. How do the resistf80p,ono/vx gtbz8-lrs 4(tk.lh s 4fances of these two wires compare?

  The length of a wire is doubled and the radius is doubled. By whagh 5 tp,p8 fkkp7u(m0it factor does the resistf0phi 5mgkpu,ktp(7 8 ance change?

  How much more resistance does a 1.0 cm diameter rt s0lugt wj2h3b(7es y.gu58jod have compared to a 2.0 cm diameter rod of the same length and made of the saugsylhj b. jsu8 7ge5t0(2t3wme material?

  The resistivity of most commorl;htb gwe.p.y s .trb/*;a9 pn metals

  Negative temperaturelt;z186 fn5xi1ed nbu coefficients of resistivity

  What is 1 W equivalen*b/ pan)1qojrt to?

  A kilowatt-hour is equt uy*m wy.rnlj:+zbe x(:q2q3ivalent to

  If the resistance in a constant voltage circuit is doubled, the powev:xbf58p4dwj moe2 1or dissipated by that circuite81bp :o xf52ojmvwd4 will

  If the voltage across a cirj,72n2n gqhlicuit of constant resistance is doubled, the power dissipated by than7li,jhq gn22 t circuit will

  If the resistance in a circuit with constant curr+) (hgyxw. jqxent flowing is doubled, the power dissipated by that circu(j gq)x+ xw.hyit will

  If the current flowing through a circuitse c.4yhu:o;rpd3x)ssl 9oy8z7c y,4t0ro xl of constant resistance is doubled, the power dissipatedc ;tyyzd4oe3 shu4l8 op:sxslco 0r r)y,.9x7 by that circuit will

  During a power demand, the voltage output is reducedy dbl3gvc7zw idw tp4t))nq 37)yp4 p/ by 5.0%. By what percentagc) v7yp npd3blp)tyqzt 7 igw43 wd4/)e is the power on a resistor affected?

  A current that is sinusoidal with respect p; xx7as5p vgys q5(t6to time is referred to as

  Consider two copper wires each carrying a current of 3.0 A. One wire hi x3aj440g rd6avz w3has twice the diameter of tx3rzgj40 dahaiw6v 3 4he other. The ratio of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which th;-:*:jzr bh/t k da 30fpe8x5cxnvntle resistivity becomes essentially zero at very low temperatures are ref 0d x;*-k cexj3:t fhv8b/zratnl n:p5erred to as

  What current is flowing if 0 rl:fev 0./(j 9b1u 3vkit bazkahpr-(.67 C of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating asrb owu,,x9/ zlv. dz1 sd,;5xkfcaw(pparatus in 2.0 min. What is .bsfw lx(cwx o 5kvu9,1/dz,a ;dz sr,the average current?

  How much charge must pass by, w0j2y ut)sv v/kqj4jq) estuw 3a:2/qrw u,b 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 iflg+ty0o(f0) 9aiq(y m(tc 3l gwh3ix j $4.0 \times 10^{16} \; electrons$ 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 mgt ,bzhzl/q-7 0d fiaxz82;kA of current, has been left on for 10 min. What is the net number of a,it z28;gmh d b- /k7lfzq0zxelectrons that have passed through the coffee maker?

  In an electroplating process, it is desired to d0u2 3vjs;/hdauhu0 qb eposit 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 sid 3u0hs vhj0a/ bqu;u2ngly charged, and the atomic weight of silver is 108.)

  What potential difference is required to cause 4.00 A(esr6d(bi8r6c vwm: fuh,e b( to flow through a resistance of r68dbm(:u,6es i(ewr (fvhcb330 W?

  What is the voltage across a 5.0-W resistor if the r:s s 5beo3l;xcurrent through it is 5.0 A?

  A 4000-W resistor is connected acr is tituub5.1;/be-t doss 220 V. What current will flow?

  A light bulb operati5 tvt,et iyunu*43l c2ng at 110 V draws 1.40 A of current. What is its resistance?uc53,et itvuy n2l4t*

  A 12-V battery is connected to a 100-W resistor. How manb ;(hr*3gj na-mnnaw2jh- 8d 6v1cbaty electrons flow through the g62bb(t1nrav*n3 -awdhjn ha-c;j 8m wire in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0.40 inrx:;,)fi px iwch? (The resistiviwrp:xi,x)f i; ty of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circu)l1sexy8l aizx36x r2lar rod 1.0 cm in diameter and 45 m long, if the resistivity 6iysa38z elrx)l x1 2xis $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (reo5 /3utio;6vv u34hwwv x6 wcwb pk;/nsistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (resistivity (yezrp04 a3q ffp*)bu $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4vpn/jne8-w / j.0 m long, measures 0.040 ohms. What is its resistivity?

  Calculate the current through a 10.0-m long 22 +,s8 qd wt7 lez ;p7u.rrmvy.tgauge (the radius is 0.321 mm) nichrome wire if it is connectewv+ .z7d7q8s,;utt. ler myprd 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 cmvw,:w kfo,sw o53m5y e. What ikv, 5s, w: ww5yofo3mes the 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 mm and a restu1h6,pa .qbreyjllt:s 9n. 5istivity 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 (resist1zxfz4odqf /pf)eg w3m1 4mn* ivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistan f i)fr-t4hbrjbq .k:-ppmg-b w7wz-2 ce 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 ,58b wdlv rd(pof 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 thm/es0ne3icu:/;jdz qyo *n9v e melting point of indium. The resistance d/ c i9n0oemq:u yejs/zv3 n*;of the platinum 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 thro 1jepel/tnzbk 0g)-x 6ugh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is ratedn9f7b dkfti 9p 97que. at 1200 W. What current will it draw?

  A 150-W light bulb running on 112u+en3 *zx5- ec.ko fzkudv vr-f5, ti0 V draws how much current?

  What is the nominal resistance2o8kkhb8( nl h of a 100-W light bulb designed to be used in a 120-V circuit(hk kohl88n2b ?

  A toaster is rated 800 W at 120 V. What is the resistance of its heaf2r-astccxo xynm 9qs5+ + 41vting elemen ovr59st-sqx+n yxmc1fc a4+2t?

  A 200-W resistor is rated b8a; :-; ;fg npwmibw rkedxuh/(a.m2 at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated xikmmz jafy+z16:0h ;4:x mumat $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, wd r ecp-gw-rxd9ay5t ,..k6c0wd . peyhat current does it draw?

  A lamp uses a 150-W bulb. 5ssrm 6 d(xyz0 If it is used at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What iwcuzz)juh 1 .5 0v(smkc 1fg2os its resistance?

  How much does it cost to operate a 25-W solde-t 6q ocyx9 7b9z2dpmnq u af-l r6hracsn:+68ring iron for 8.0 hours, if energy cost:quqo-fa962d -m rz7 sca8x6bpyctnl9 n+ 6rh s $0.08/kWh?

  How much energy does gp-)b+sdrdn .jjwc44lai8o+ a 100-W light bulb use in 8.0 hours?

  A 1500-W heater is connectamrmx q/+-3bv ed to a 120-V line for 2.0 hours. How much heat energy is -rm +/xqbav3 mproduced?

  A battery is rated at 12 V and 160 A-h. How mwwt;j*u ms-r1uch energy does the battery store?s-w1r*wm j;tu

  How much energy does a 25-W sold-8 9ghmlm.ueeering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming the power compar1- 3g*qow2rz1depp(gax,-p av 3d r qny charges 10qw3radr 1a, rdppq3 ox2-( v* pegg-z1 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0uk/1g / byle*6pl;wfh hours per day. If electricity costs 10 cents per kWh, howw;6b gu1ykpfleh*l// much does it cost to run the computer annually?

  The monthly (30 days) electrim recme*/+kj0javo*t 4d,c5s 26 mmfq c bill included the cost of running a central air-conditioning unit for 2.0 hr/dae m05m*kc/m + * evq,trf4jjcs 26mdoay 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 heuepv1r i pdi8,44 pxz-at at the rate of 2.1 kW. The heating element short4zip-v edpp48i,xr u1s 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 element?

  14 A of current flows through 3p g: nto u-8*q9 llumqhg*fg*$8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costseds3rnd+e5 )uhq bu wwy il+btx.0g90p9*i( p $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% efficiency. 8fytb .4izf98a h6x ew,atb.hHow much current does it draw from a 120-V line?b z8h4 6xahfe,.w9ty8 a .ifbt ($1 \; hp = 746 \; W$)

  A 500-W device is connected tuhia wly v/:+q )d8f0mo a 120-V ac power source. What rms current flows through this dd)h/fwa0+ : lyim vu8qevice?

  A 500-W device is connected to a 120-V )w*d ufh0vt. ad 8ssatk-1d0 dac power source. What peak current flows through thi00d t *wut.1dh da)dfav 8-skss device?

  A 500-W device is connected to a 120-V ac power sou:ytz*8r d)fn r 2tsj,sbe,i i5rce. What is the peak voltage across this deviceyz),b5ririj:d2t, t *sf8 e sn?

  The diameter of a copper wire i0,;hk3 gt9aywsv 1jge2,03aqym qhbk s 0.081 inch. The 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 electroy0eh9kjbsvy20, qg3q ht w; a1mkg, a3ns? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)