A device that produces electricity by transforming chemical energy into eb 1 ;luf3.d5qvyi)vx 1fjap2olectrical energy iqo31;u 5 2lyi) fjvb dfp1.xavs called a

  A car battery

  The total amount of charge that passes through a wire's full cross section at an u0lflui.l5d- y point per unit of time is referrl 0ud5 -uif.lled to as

  The direction of convention current is taken to be the directio;;f3gs0fuee/ 3 uyi*8:ehb: vus m wnon that

  A coulomb per second is the same asuz dzc.;)dwqw+j829a(pns,xd * xkx z

  Car batteries are rated in "amp-hours." This is ak,5w efca)6 6c8 n1jkk u/bz2ck4jtje measure of their

  The resistance of a wire is defiu* a9yr 13n9uvzqxie8ned as

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

  The resistance of a wire mr( smrv5/d0wo5,r a:v-nm 7u9 yqz(naer2 t nis

  The resistivity of a wire dependswa1d9n0l /bxqqna 1g9 on

  Which conducting material has the lowest resistivity vaofznkxmht0;sfglj*p tt/+ 53 qz; l6+lue?

  Consider two copper wires. One ha0/ -m*oyiz tdohe /ef:s twice the length of the other. How do the rt/* efoyz ohmi:e- /0desistivities of these two wires compare?

  Consider two copper wires9s 06;v)1hwgeb fincy. One has twice the length of the other. How do the resistanc9;vw1n ibfh 6)cgsey0es of these two wires compare?

  Consider two copper wires. One has twic:1dv+cslpdrwd d;7 a6e the cross-sectional area of the other. How do the 7p vd:rwdac 6s;1ld +dresistances of these two wires compare?

  Consider two copper wires. One has twnksqk d6p r4:-ice the length and twice the cross-sectional area of the other. How do the resistanc k knr6-:4psdqes of these two wires compare?

  The length of a wire is douj j.s0fx- 7.j b*zhxzlbled and the radius is doubled. By what factor does the resistance chanb7*.s0-zj . ljxz xfhjge?

  How much more resistance does a 1.0 cm diameter rod have compared cq xe83dh:hdabfr-xr o24d * )to a 2.0 cm diam 2qb3x4d)fadrh8or:-xc*de h eter rod of the same length and made of the same material?

  The resistivity of most common c2job as;)yz;6 af,jrmetals

  Negative temperature coefficientscjx 5yiiq568fti;r) g of resistivity

  What is 1 W equivalent ;cyko- x1uhtoka/t .6 to?

  A kilowatt-hour is equivalenub(jsx w sd 0qv7).(yit to

  If the resistance in a constant vorry; *(7yfpi xltage circuit is doubled, the power dissipated by that circu y;7 yrr*fix(pit will

  If the voltage across a circuit of constant resistance is doubled,/kou.6 t zc5ee the power dissipated by toek t6/.ce u5zhat circuit will

  If the resistance in a circuit with constanef;2rt h:. uipt current flowing is doubled, the power dissipated by thath;er u.2pitf: circuit will

  If the current flowing through a circuit of constant resistance is whufu-vx e;d0z8id3 2 doubled, the power dissipated by that circuit wid;d zfhuw32 xv-uie80ll

  During a power demand, the voltage output is reduced by 5.0%. By what 6b/v v+3tm6xk3r nptc.k bm-vn2 d c(dpercentage is the powe(3kpkdmm-.d bt6 t/vvb nv+6 xr2c3nc r on a resistor affected?

  A current that is sinusoidal with respect to time is pd4q x396s*-wgnio3y tnt7mvreferred to as

  Consider two copper wires each carrying a currenjj bqqp ofd19wx*6.x+t of 3.0 A. One wire has twice the diameter of the other. The ratio of the drift velocity in t *1.jdxfopbwqj+6x9 qhe smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomes essenav bc34: il3y pobm:+xuc pg((mwv+ e:wvx* 8jtially zero at very low temperatures are referre (ou+wgppbaxvcvmelc34 mi8*(3:y:+ jxbvw :d to as

  What current is flowing if 0.67 C of charge pass a point in,)se y,roggio*8n p s; 0.30 s?

  A charge of 12 C passes through an electropl+vbl5wh , h-wjhk5) kef w*9kpating apparatus in 2.0 min. What is tv) f9klkwbphh5k*+he w,5j w-he average current?

  How much charge must pass by a point in 10 s for thew k.q6 qaidt3.a) 0mlh 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 if9 ut7 3,abigfd $4.0 \times 10^{16} \; electrons$ 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 min. )p+qynp06mx 68(thp jl: fgior ;;jjo What is the net number of electrons that have passed throuh6pn;j f:i (jqpl+oo60j mtrg8 )p y;xgh the coffee maker?

  In an electroplating process, it is desired to deposit 407 -ak- yfzmiack4*0rh/sfjzt4( w7x f 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, and the atomic weight of s4 amxcsfy *7-iak-hzz4r(7jt/0f wkfilver is 108.)

  What potential difference is required to cause 4.00 A to flew:ts5)b gil; dj45onow through a resistan;o):ij5d b4 glt5snwece of 330 W?

  What is the voltage across a 5.0-W resistor if the current throu6i12:6/vshw dkn jnbys s5 k;dgh it is 5.0 A?

  A 4000-W resistor is connected across 220 V. Whnt s ;qic y/m.a;v v8z*u,dod0at current will flow?

  A light bulb operating atg w8:kaynar)2 c4io wbzfr 6p0 ,qqu0: 110 V draws 1.40 A of current. What is its resistance?:wf ,)gywqq06 o ck8nrpra2az b4i0: u

  A 12-V battery is connected to a 100-W resistor. How many electrons fpx; cgf7og18vq 0 -cim/2fmk jlow through the wire incx ogv;cjff81k -m/g7p 2i0 qm
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0:20y2jf.t lmvhxdp z:.40 inch? (The resistivimx. 2j h:pd0zvftyl:2ty of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameter and 45 m l u5zfk2(2o8u mh6 rwynong, if th rumy (w258n6foukh2ze resistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire i no*.5g +bb3pfv/ qqk(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 (rzzu. ,;.l 8x ;hruddvwq x5 xz3(/qbuvesistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 its resistivi aqp)w b38jyejm+s8e6 ty?

  Calculate the current through a 10.0-m longw3wcf *3sxw(r 22 gauge (the radius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. (Thc3 sww(wr *xf3e resistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and lg8j, y xdirr93t1nq 3of rectangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when 8lig,yd xt1j r3r9nq 3it 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 an m.zxq 5ku:+ /8w9ehtad2vgnv d 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 (jvc83:j5n -m x*r qmkhresistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistacd5w/,s r 3x4 hnhsnj8nce 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.,(zuvhtg -.t0q r zmh 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 th 4 nh(3yof 4zrqn6ktn(e melting point of indium. The resistance of th3f64 t n(onhr(qny zk4e 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 thr,f i gkj*zs*e7e hpd)8ough an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current will iteo42l;(pmeza4. 1ms pi0h tdi draw?

  A 150-W light bulb running on lg us 86u7wl5uy/k.fk 110 V draws how much current?

  What is the nominal resistance of a 100-W light bulb designed os2*.acmyt l-ezhtq6uf+5w 7x z/e9 xto be used in a 120-V 5e2mzx9-tz7uq/co x +wa tyehl6s* .fcircuit?

  A toaster is rated 800 W at 120 V. What is the resistance of its heating elemenc,7l+ue2 1zo;x ;nai9olga cvo ea al;u i c9xn1+lg2oc;v7,zt?

  A 200-W resistor is rated at ,nev lwwg()1: bmlrb /;x;pc 0sutrk/$1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated ko;sjur;fb (4 at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulbpcj-/v2*p gfx;yh+fn. If it is used at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is its resipc t9 d*rr*sxs4lt7(v stance?

  A 25-W soldering iron runs ons7;-.5 wjkmxsmhi )eg 110 V. What is its resistance?

  How much does it cost to operate a 25-W)ae ov y5e;jm; soldering iron for 8.0 hours, if energy cosy5 eje;aom)v ;ts $0.08/kWh?

  How much energy does a 100-W ltx ;c l,xv tx/px t:sr7:erb17ight bulb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much heat ener rpgoud74,p h(gy is produceu4,7hdrg p (opd?

  A battery is rated at 12 V and 160 A-h. How much energy does the battery storcz a5ts k dp0/*iwx wjq4-19rgi p0uz(e?u/d(w sqj1a 0p5txi*z- 0rz9gwpic k4

  How much energy does a 25-W soldering ion*t/54+ xxcwm s bn4 cyc8n5kron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 , /j 8yqcvw-a6wy+htolqf+s01ap tm3 hours per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate t6yq 0-hw, cv op+8ysa 1qw+tl/atm3jf he annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is 8hs6-h5m2qk womeqh6 turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to r65qkh he6 w 28-qmomhsun the computer annually?

  The monthly (30 days) electric bill included the c6xxn cv )h)y2cost 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 items contribute to th)26yc vh nc)xxe cost of the monthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element in an ed k)*k1jq.-azq/uem6hk.fpyot q,*clectric 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 temperature is unchanged. In reality, the resistivity of the wire will depend on its temperature.) What effect will the repair have on thej*c .).po/qf*zq k,u yek6h1a -kmdtq power dissipated in the heating element?

  14 A of current flows throukun qtel ;r9xo+ ;ts.9gh $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs cun /kr tz hqt7,:fx)g2dn) +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 ha8qx,-ol 3fwzjs 60% efficiency. How much current does ixzjwqf-,8lo 3t draw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rms current flobiph :*st*ax 4ws throug ax p:bh*si4t*h this device?

  A 500-W device is connected n5 l9r(opptcb.4b-js to a 120-V ac power source. What peak current flows through this 5r- 4nj(plbp .tosbc9device?

  A 500-W device is cono9ei.m-sa+x9j.zcd tikvjg /;,6lu w nected to a 120-V ac power source. What is the peak voltage across this djxjzd9+.mogu,/lc tw9;-ki v s6 ea. ievice?

  The diameter of a copper wire is 0.081 inch. The maximum safe current it caxcis w6 7dnf)igb//r15 njqu( n carry (in order to prevent fire danger in building construction) is 20 A. At th uj)5(dbfii xr 6qcwn7/s1gn/is current, what is the drift velocity of the electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)