A device that produces eleiv(f3qli002w lxcq*gmoj2 d(ctricity by transforming chemical energy into electrical energy is calledcli ioq*02(mjw( 3xf 0l2qgdv a

  A car battery

  The total amount of charge thas ni: s1dfr( ki((reibr3f5+e t passes through a wire's full cross section at any point per unitrif +(s:en31feid k si(br(r 5 of time is referred to as

  The direction of convention current is taken to be the directio ed3k88b8v.o loxjv0,my( q han that

  A coulomb per second is th(r8va4wxu/rtl +g i; b0zjl.4 spxeg0 e same as

  Car batteries are rated in "amp-hours." This is a measure of thqr.jix4ms 1 ng*p/zv )eir

  The resistance of a wire is definedw*p /yo-pm m;a as

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

  The resistance of a wire is kpluzg4b*z,,oaf( r+

  The resistivity of a wire de3dqcr z s)au/s0no-cx5u 9p2 cpends on

  Which conducting material has the lowest +bz dfpns cq442 3kokc( v54ezresistivity value?

  Consider two copper wires. One has twice the length of the other. jh+ (11rgyceu(y tmtu h,(gn2How do the resistivities of these t1n(gh,yucr(ttj e(y1u h2g m+ wo wires compare?

  Consider two copper wires. One haj(dpau0 wl/h 3s twice the length of the other. How do the resistances of thesejl0(3wh up a/d two wires compare?

  Consider two copper wires. One has twice the cross-seqgw bn1x,ppgo;4 .9 bgctional area of the other. How do the resistances of these two win9bw .4pg1;ogpqg b ,xres compare?

  Consider two copper wires. One has twice the length and twice to 1v) i9- hlob,.nurubhe cross-sectional area of the other. How do the resistances of the .9vul- oiuh1br b)on,se two wires compare?

  The length of a wire is doubled andbf k:7u55+wtt; p8mmnatdo)f the radius is doubled. By what factor does the resittou5mp; )5wbmtfd+:7a 8 fk nstance change?

  How much more resista;cymg lsjgt/pd9+xfzfc7z6 1 l .,*a l3hdsk0nce does a 1.0 cm diameter rod have compared to a 2.0 cm diameter rod of the same length and made of the same mater31zc hf.l dgk;ps ,*xf+t09 jdlc/a7sy6 gzlmial?

  The resistivity of most common metalshq/9yc fy( .ntack83ck 06q bi

  Negative temperature coefficients of res0gy +:eyrm c1+4m n-uim mbi*sistivity

  What is 1 W equivalent 5yllyl /s1+fy to?

  A kilowatt-hour is equiva:e4-lrp0f iaz*cfn( x,n4hm; x0 jalvlent to

  If the resistance in a constant voltage circuit lbsdo morf :i+y-6z0,.lan5w is doubled, the power dissipated by thambrlzoi anylw5 6-+od, s.: 0ft circuit will

  If the voltage across a ci9 kl-0noc+ q,9 h8gkupaeq 3y5sa vwb4rcuit of constant resistance is doubled, the power dissipated by that aqk ,4v ob580s k9y nequwg3pa-9h+lccircuit will

  If the resistance in a circuit wi5*j*bffq zm,d7e(g egth constant current flowing is doubled, the power dissipate e*5efdmq7j gbf,g*z (d by that circuit will

  If the current flowi wo/kf8xy(4j5pv.7vwl q3 ytcng through a circuit of constant resistance is doubled, the power dissipated by thaxo5wy8kcl7(3/vfqj p t .w4vyt circuit will

  During a power demand, the voltage output is reduced by 5.0%. By what;eb1hearya quj99 kq5m 0ra 8pqh35v7 percentage is the m 39h ;ay u abpqjv0rkeqqh e15795ra8power on a resistor affected?

  A current that is sinusoidal with respect04xj .;ponkfa to time is referred to as

  Consider two copper wires oj(z dpru+ ixl4. 6+gneach carrying 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 the larger dia6dg+l.x oj4pi u( n+zrmeter wire is

  Materials in which the resistivity becomes essentially zerkyilqma:x o ,j5e8+2u )rl qd4o at very low temperatures are referred toye8:mr,iqu)x+5o q4 ll kaj2d as

  What current is flowing if 0.67 C of charge pass a ffd-;d3x d81vy8fbgupoint in 0.30 s?

  A charge of 12 C passes through an elekrzex:4- ps3j ezl57 uctroplating apparatus in 2.0 min. What is the average7klsr-34e z5j:ezxpu current?

  How much charge must pass by a point in 10 s for the currenz7dby f0cdahn*2nmr s/;( 9rmzdz8,h t 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 flowxnnq.q/7 glqtxq(d. 4ing 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 current, has been left on for 10 8k9 tx y 9yh8ihla*c/gmin. What is the net number of electrons that hav x8y9ghl*ta8k9 / cyihe passed through the coffee maker?

  In an electroplating process, it is desired to dep(kdpd mt/k8;o9e+ yxnosit 40 mg of silver on a metal part by using a curredte +(x 8kmpnok/d9y;nt 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 atomic weight of silver is 108.)

  What potential differeryidja)i) 49ka f3 wi2nce is required to cause 4.00 A to flow through a resistance of 330 W? 3ajia)9k rywid)f2i4

  What is the voltage across a 5.0-W resistor if the current through it u30w:qr *v(zg ui zfk( uy4l3iis 5.0 A?

  A 4000-W resistor is connected across 220t,e7nqqat7 w+fx *as8 V. What current will flow?

  A light bulb operating at 110 V draws 1.40 A of yt)6 t fjj2j12irtbv)rqu2i;current. What is its resistance?)j2tv j1u2r;ri y qjt 6b2)ift

  A 12-V battery is connected to a 100-W respfkaw5.la(l51 kf hg3te* gt:istor. How many electrons flow through the wia w:gfe5hf kak*.1t5(tgpll3re in
1.0 min?

  What is the resistance of 1.0 m copper wihr+ fv8xr(q+tre of diameter 0.40 inch? (The resistivity of co+r q(t8+r hfxvpper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in dia t c9l7md/wzo7f k42wxmeter and 45 m long, if the resistivitywf2t94x o/ d kmlc7zw7 is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resistiv,jyu 7 ;a 4+xiokgayy,ity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (resipou3k 7toqr+j vf3b 3vie,h,6stivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 m lovz5ivda39-lq0u(valgy *6 hxng, measures 0.040 ohms. What is its resistivity?

  Calculate the current throu f93fjjl+zf -- lnhy6uza35hygh a 10.0-m long 22 gauge (the radius is 0.321 mm) nichrome wire if it is connected to a 1 hffhj9 5nuayz+-63l- l3yf jz2.0-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-sec ts v*h/jcbf+jc2ej24 tion, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carries 4000 A? (The resistivity of coppe42jh *c tbs/ cejfv+j2r is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichrome wire has a radius of 0.50 mm g/3 ltru2 wv:cj yt +i06t-ol+v)pehxand 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 (resistivitvq/safz9w2tsj1 :4 n7scd yh/y $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a rt 7rteh(a 8;.r,q ruqdesistance 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 regrq8/ z+z6 yzksistivity 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 - 04ksl 51ixbbyxkt3oindium. The resistance of the platinum wire is y ki0b klo5s41xxt-3b$2.000 \; \Omega$ 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 throuog( 2,9 w p4arfhcj1fc )rl6odgh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current will it drabgt;,n e93sx: zt dh7iw?

  A 150-W light bulb runngfd)/q4tt* baox 6 zbb5/mqy9 ing on 110 V draws how much current?

  What is the nominal resistance xk9 j vm5l)q6lqn92h so. cx(hof a 100-W light bulb designed to be used in a 120-V circuit.5 x(9c hq skhqxml6 o)n92ljv?

  A toaster is rated 800 W a6w iat el2od 2-e-,vhwt 120 V. What is the resistance of its heating elemen2etei lv,d26 ahww-o -t?

  A 200-W resistor is rated -c(n3n ow.hcn-w(fxjat $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated at l 2e-hmka5pvp3 myu;-$1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 Vf j; w7/gt.xue, what current does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V,i fj i2d(yuxa(46rn:u9pb03 jk:itsh what is its resistance?

  A 25-W soldering iron wvmu ) 1gfnoe: y0am+:runs on 110 V. What is its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hour0uvn8v oqu +:ko4.i brs, if energy cosubk4o:vu o+qv. ni0r8ts $0.08/kWh?

  How much energy does a 100-W light bul0zwoh60 3shoad w51u dnq)+t5v4r y3*gdm wkfb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V linpfm..k o u +no+rmo1:w) r1kzde for 2.0 hours. How much heat energy .mm:d uokrofwnp)+z+ r1o.k1 is produced?

  A battery is rated at 12 V and 160 A-h. :jf7zv +wqv8q How much energy does the battery store?fvq8+zqvj :w 7

  How much energy does a 25-W soldering iron use ;-sd )dpn ckbn ,./tlain 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming tho9-yf hpqn(cy bt16f+ q0fxwes:(j15cg e dl,e power company charges 10 cents for each kilowatt-hour of electricity dhqfwo61eb f:p,n-9(5gtcq+ fj yyxc(se l10 used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0 houn1- gz7chnsv e.u s-+yrs per day. If electricity costs 10 cents per kWh, how much does1--zs+.u hsecnv 7gn y it cost to run the computer annually?

  The monthly (30 days) electric bill included the avn-;qkzy*0ew9z l:cm k):vzf;5ss ccost of running a central air-cs )l5-c ns z: e;y0;:zkwz vak*qmcv9fonditioning 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 contribute to the cost of the monthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element in an elnmha6 x ko66e2ectric 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 tem an6o6m 6xekh2perature 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 t; uqri ,xe6mm7hrough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs2x( qa5o0 k lkhv:d7 3stlp0szpa lw51 $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% ef4 wp,nqe*;h bvficiency. How much current does it draw from a 120-V line? hw*v;b ep4n, q ($1 \; hp = 746 \; W$)

  A 500-W device is connecty*0cwrmhtb yb,j)* u5ed to a 120-V ac power source. What rms current flows thy5u 0*r)bwyhmj b, c*trough this device?

  A 500-W device is connected to a 120-V ac power source. Whatl/; p a.uvjy) g,-ygih peak current flows tg;,-)y.va ulyhg /jp ihrough this device?

  A 500-W device is connected to a 120-V ac powt( 8jm2 gomunr( 1,zyyer source. What is the peak voltage acros y(tm 2yrm8z,no 1j(ugs this device?

  The diameter of a copper wire i3 39jh6j p6 lwqzq-vjzs 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 electrons? (The number of electron carriers in one cubic centimeter ofjjh-36 9wq jvz3 l6qzp copper is $8.5 \times 10^{22}$.)