A device that produces electricity by traa uh+l za7cge52.b3r wnsforming chemical energy into electrical energy is called a3g w.2 +bacela uz5h7r

  A car battery

  The total amount of charge that passes through a wire's full crhhm- +*1ez mfposs section at any point per unit of time is referrefhp1h mm+ ze*-d to as

  The direction of convention current is taken to be the direcp0je-6r5xr5-f p90f fv dqrz gabd 99stion that

  A coulomb per second is the sso+osex,9v :n ,qhg nq5ea)6eame as

  Car batteries are rated in "amp-hours." Thie iyn0dt87o 2-diie+js is a measure of their

  The resistance of a wire isofc9xky )uzqv87 9bey0* (q sq defined as

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

  The resistance of a wire iucgp;+b-:*o 6j v3obta .a duss

  The resistivity of a wire depend4 zevzau;a5+g s on

  Which conducting material has the lowest resistivityfl 7ed *4)bcgf value?

  Consider two copper wires. One has twice the length of the b)a(on rhe d5:other. How do the resistivities of these two wireo)n:h5 a ed(brs compare?

  Consider two copper wires. One has td (xgu .iiye-n l8c71owice the length of the other. How do the resistances of these two wires compar.u(cie7gdxly n1-oi 8e?

  Consider two copper wires. One has twice the cross-secti0ujq2wy0v st1q2q(q fonal area of the other. How do the resistances of 2q qyst01q0uq w(2jvfthese two wires compare?

  Consider two copper wires. One has twice the 95gqk6p xfe ga n9**sblength and twice the cross-sectional area of the other. Ho96n *qf9 gsbkxega5 *pw do the resistances of these two wires compare?

  The length of a wire is doubled and the radius is 3n. btznqh/8q*w o t2kdoubled. By what factor does the resistance chaqtz*nnh 8qbk3.owt/2nge?

  How much more resistance does a 1.0 cm diameter rod have ka(u*v;( 3*sv-sif gh/bevx k compared to a 2.0 cm diameter rod of the same length and 3hx*svv (vb-kske ugf(/ a;*i made of the same material?

  The resistivity of most com+q j5.+3ts8 g hi ahi2u5kpweomon metals

  Negative temperature coefficients of resistiocgcl0 4i; audm x9blw,;1.ynvity

  What is 1 W equivalent i. t; gmpg/zy3to?

  A kilowatt-hour is equivalent t y;,elu- h1vi , tg69axjvjot)o

  If the resistance in a constant volrx 2/p 65ey(c1fgmo odtage circuit is doubled, the power dissipated by that cir edro5 m2yfxpg(c/o61cuit will

  If the voltage across a circuit (p.gn74cb4w yyeofl 0of constant resistance is doubled, the power dissipated by tlo.eyf 4gpwcy4(n0b7 hat circuit will

  If the resistance in a circuit with constant curren-,m*f q y rtb/hq,zw )a.c3ebet flowing is doubled, the power dissipated by that )re q. bmhcqeta-/yb*3 f,,zwcircuit will

  If the current flowing through a circuit of constant res/g-4fc2qho aq .kz7 kjistance is doubled, the power dissigzqk2 f/7ohkc- 4j.aqpated by that circuit will

  During a power demand, the voltage output is reduced by 5.0%. Byus5mc7d/j:1uk7zn +o uso5m a what percentage is the :/o o7+zjsumcamkd1 s75 un5u power on a resistor affected?

  A current that is sinusoidal with respect to time is (nv cfl(0qs 0nreferred to as

  Consider two copper wires each carrying a current of 3.0 A. One wire hh/ u;wbm ,o6luaths.:as twice the diameter of6lu:b/.tw ; ohsh mau, the other. The ratio of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomes essentially zero at very low tem*h j ,38 ajhi-scsat)cg *vqc+peratures are reshv-cg *tj*+8ajicc) aq,3hsferred to as

  What current is flowing if 0.67 C of chr+3- uc i wp7u *rpsq0pw/uk-earge pass a point in 0.30 s?

  A charge of 12 C passes tf v )r(7oh2qathrough an electroplating apparatus in 2.0 min. What is the averav7ha o2(q )ftrge current?

  How much charge must pass by a point in 10 s for the; o-fq: : tzql.uiy/et 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 1t,xi :luzn:f 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 lefq:g0 acv4qo2 gr9bra 8t on for 10 min. What is the net number of electrons thg 2qvr r:0c go98a4bqaat have passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg4 /swx v*uxd)k8t+uj k*k do1n 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, and the atomktj8 wuuxv*xo/s *14+d ndkk)ic weight of silver is 108.)

  What potential difference is required to cause 4.00 A to flow throui,n8- ceg,amv gh a resistance of 330 ie8m g an,c-,vW?

  What is the voltage across a 5.0-W resistor if the current through it is 5.0 A?a0 )ai .f tv5pzwq8:2+jik9jfmto rygq p*9 5q

  A 4000-W resistor is connected across stc+l6* +74xixgsatnpk350 cpk8qo v220 V. What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its resista-4 j,sxu,10xyvd zv xyncexy dxx, y -j1zsvu,40v?

  A 12-V battery is connected to a 100-W resistor. How many elepa1 3q7 xudhqe, xezvvu6l,2(ctrons flow through theu1xa ,ev6 (2ldqqpv7,xez 3uh wire in
1.0 min?

  What is the resistance of 1.0 m copper71akp:pwiaqfg0r8 j10lw bo5y1 w xe. wire of diameter 0.40 inch? (The resistivity e1ib087wk1 r:lp oxaw1pwqa5.fj0y gof copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diametevkg9p:b gqxhsw(u .;2 r and 45 m long, if the;b gs (2.kuqh9vp:gxw resistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resisfa s6il.dy69g1f zjze 5y2le+tivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (reet2e;ki x o2 /id,6b/x1yaklm sistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 m9ci p)fj +gen+ long, measures 0.040 ohms. What is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge (the radius ijcy 4;3/xzx yjs 0.321 mm) nichrome wire if it is connex 3yxj;4zc /jycted 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 2uny) lz+ z/y bd7rv;(g)-buud .0 cm. What is the voltage drop along its length when it carries 4000 A? (The resistivity of copper ivuld+b dzubrz)/u; n )yy(g-7s $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichrome wire has a b 8m )/4c9zk 3jxmhmotradius of 0.50 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 (resistihaa*d99fv,2cmh 2 zq3 cw y2idvity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resicm0e2y.od qg 2stance 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 resistivi5 i.2y )v bqsbti34q vi po.xr,:5nxyzty 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 ijqe.l 9(h jm1)+l458xyki mdpa7y e eendium. The resistance l1xljdype+4e7 ma jq8(e9 iye. )hk5mof 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 through uzqfa 0up7a94 an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. zzk ip1hp/ .g)What current will it draw?

  A 150-W light bulb running on 110 V draws how much currcnmd.ymylu**f :g ac 2 6kpz 0;5y4m-bxua6 ssent?

  What is the nominal resistance of a 100-W lightlad w546rco2b-*yii +1e/-b ddu bkij bulb designed to be used in a 120-V cir 1 iubdb6adkybi we+lc o-2irdj4/5-*cuit?

  A toaster is rated 800 W at 120 V. What is the resistance of its heatinb3 *azl0eu3 asv2c7crg element0r373 cu*v a ezl2abcs?

  A 200-W resistor is rated at3mck/:m+.jspy w1lz k $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ralh y8h2 d;owl;ted at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120yu,v cu nzn o).s9v/w- V, what current does it draw?

  A lamp uses a 150-W bu r. y1dfp5gxmb +x2r1ulb. If it is used at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What is its r7:wl5 bzw3atfid/u9ayuj. ixk- m) 3zesistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours3 :+8tgrg wjph, if energy pjg r:w+h t3g8costs $0.08/kWh?

  How much energy does a 100-W lig.5wt7sb2 p iktht bulb use in 8.0 hours?

  A 1500-W heater is connected to:m ;ik.k 77j 7bcpbv 04)oco e5w xmwagpp/nx6 a 120-V line for 2.0 hours. How much heat energy 7j 7ow.bei07p)p wpkv4m5;/ n:xcmxbkg 6caois produced?

  A battery is rated at 12 lg.ypu:4*m35rs9yy+/ r,*oep j nlp gct:d r qV and 160 A-h. How much energy does the battery store? +, mc: *ypr5yoqgd r4ep9:gpurl/ *3 sy.jntl

  How much energy does a 25-W soldeyvod3i ,8ld 6oring iron use in 8.0 hours?

  A 100-W driveway light bulb is oniw :ehtw7p2crm90 p i2 10 hours per day. Assuming the power company charges 10 cents for each kilowatt-houm 2rtihi cwp:e p2w709r of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0 hog7b3e,h70sq 6f copv q qiff:8urs per day. If electricity costs 10 cents per kWh, how much does :bs0fie7v 6,8 fq 3p7h qqgofcit cost to run the computer annually?

  The monthly (30 days) electric bill included the cost of running a central airw)2as sl8uq eeog2ow -f5-be) -conditioning unit for 2.0 hr/day at 5000 W, and a series connection of ten 60 W light bulbs for 5.0 hr/d2owl2 e )useg o-ew5)f-qa sb8ay. 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 operatest1wb/z.p z/kvsi g7xh+ jpc9/ 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 repair have/7h/ gzkx .+stcpz9b1 vwjp i/ on the power dissipated in the heating element?

  14 A of current flows tx-3tg+h amz td2ruu -)gh9kl4hrough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costsnzh+il 3e-(xz $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 6si9ap uept3 )6hjxo4,0% efficiency. How much current does itip4 jtuo6xe 3as,h 9p) draw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connectedki *bn 1h4q-egki;) mi to a 120-V ac power source. What rms current flows throbii h 4)q-i kk*g1;mneugh this device?

  A 500-W device is connected to a 120-V ac power source. Wh/n x op0p jy16ymo)u5tat peak current flows through this devyu1 p5j6n )om /x0oyptice?

  A 500-W device is connected to a 120-V ac power source. Whavfnl0r rz( ) 78- q;wkgsr+ivkt is the peak voltage across this de)78 wvrgnfirl (0 q-k;ksz+rvvice?

  The diameter of a copper wire is 0.081 inch. The maximum safe current aqq bx355xnejd 0y (t0it can carry (in order to prevenat(x nyq b0j5ed530x qt 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 of copper is $8.5 \times 10^{22}$.)