A device that produces electricity by transforming chemical energyd4xxw88o5oo3(warj * * +fko k6dia pc into electrical energy is calac8roo+dx *axo3*46k ifk(o pdw58j wled a

  A car battery

  The total amount of char; m3m6hmvtg:h+c asd5vf w-x( ge that passes through a wire's full cross section at any point per unit of timew3md (+ mvsf5htgchx 6m-a;:v is referred to as

  The direction of conhb:hextv8lgui46: 7 avention current is taken to be the direction that

  A coulomb per second 0de-j*dy fld9j k6 fy*jxm l;4is the same as

  Car batteries are rated in "amp-hours." This is a measure of thedaw/1(ay2m 0xz)nn njir

  The resistance of a wire is defined arfv/rd7o8:y,lx5 y 4g njk qx;s

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

  The resistance of a wirlza w6 i,,/qf 57tcogae is

  The resistivity of a wire depends w6xrciwve7l 67nt; s( on

  Which conducting maternbzq- yq f *hyoy;;q,2ial has the lowest resistivity value?

  Consider two copper wires. One has twice the length of twn5m d,5:sqf(3mz heqhe other. How do the resistivities of thezmsew n, 5:qmdh q53(fse two wires compare?

  Consider two copper wires. One has twice the length of the othmcl* ov- 9yw m(+eg0ijer. How do the resistances of these two0 cmei-v(l9y +j wgmo* wires compare?

  Consider two copper wires. One has twice the crox(8wu k rq67uy,4diy*zclm9.mfx/ f css-sectional area of the other. How do the rf*7 ucf(kqi8m 9ymc ryl4 .,x6wdxu/zesistances of these two wires compare?

  Consider two copper wires. One has twice the length and d (zuueh: w*4rtwice the cross-sectional area of the other. How do the resistancezu(4d:wu h e*rs of these two wires compare?

  The length of a wire is doubledwhp )zn5 *4s6kbwyz g( and the radius is doubled. By what factor does the resistance chanh4zs5 *n6y(gbp kww )zge?

  How much more resistance does a 1.0 cm diameter rod have compareh yqclduo91x*a,6q7 jd to a 2.0 cm diameter rod of the same lengthj x*qu17 y, dqlo6cah9 and made of the same material?

  The resistivity of most common scukzsr84 9g1 metals

  Negative temperature coefficients ofibg( ,p,v s1mw resistivity

  What is 1 W equivalent to?nx bq fxez:tc4bu/85 8

  A kilowatt-hour is equivalent jk.bjvv4xc :1+thqi18d zyx 2 to

  If the resistance in a constant voltage circuilcyhl 8nhw14o2c 5 0gst is doubled, the power dissipated by t hc0yg54s 8 cll1now2hhat circuit will

  If the voltage across a circuit of con* +j:zvt qyo1ustant resistance is doubled, the power dissipateo:+z1vj*q y tud by that circuit will

  If the resistance in a circuit with constant current flowing is doubl 4ng2dzswf8lnc7y80g ed, the power dissipate0n zcg7n248w fsd 8ygld by that circuit will

  If the current flowing through a circuit of constant resistj79 i;;ea pm7p48 bq5cigfelbb, v zo.ance is doubled, the power dissipated by that p.c4, 87q9l;5vbgpm z7febj;i ieoab circuit will

  During a power demand, the voltage output is reduced by 5.0%. By what percentb69 dhets55 ssage is the power on a redtes95h6bs 5 ssistor affected?

  A current that is sinusoidal with respect tou1zq8h hrkqd ; g* m:4*v-javp time is referred to as

  Consider two copper wires each carrying a current of 3.0 A. One :k l/1bpbm9 b/dp5v) cyrv/liwire has twice the diameter of the other. The ratio of the drift velocity in the s)9 dbkp lmlpviy v15c :r//b/bmaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomes essentially zero at very locv( yo(ag l hkf1w 9z4p*8-prhw temperatu(gahy pzhl k*rcfwo-91(v p84res are referred to as

  What current is flowing if 0.67 C of charge pass a poinj3vpxzdh(q3t )hbv *8t in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus pt 3qc2sm4 kc0in 2.0 min. What is the pmsq40c2tc k3average current?

  How much charge must pass by a point in 10 s for the current to be 0.50c-fpxhegc o1 exm)ny4o39-4 j A?

  A total of $2.0 \times 10^{13} \; protons$ pass a given point in 15 s. What is the current?

  What current is flowj/8mh; o9tyib ing 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 curv ek-r 5vfxsuv51q a9l-*cju:rent, has been left on for 10 min. What is the net number of electrons that have c- slax1f*:-rv k5ju95uqevv passed through the coffee maker?

  In an electroplating process, it is desired o/ ta4 9*ybxcp): dtejto deposit 40 mg of silver on a metal part by using a current of 2.0 A. :x ct4odba*e / 9jpy)t 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 differenc4g0p xo p(1nwre is required to cause 4.00 A to flow through a resistance pp14nx o0gwr(of 330 W?

  What is the voltage across a 5.0-W resistor if the current 6+ e/zdu,usjethrough it is 5.0 A?

  A 4000-W resistor is connected acroon5i.e h+np0 uiakr* m69 ijr+ss 220 V. What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its resistangk m5 r4ad rui91)uvffw)6n+ scesa)1n49i+ gu)fr6 wkv5rf d mu?

  A 12-V battery is connect +/fm1o a3wi)fn1ug- p 62 obkr7ekfdued to a 100-W resistor. How many electrons flow through the wire )k7m +- 6ferud2kf1naw3i/gbp1 ufooin
1.0 min?

  What is the resistance of 1.0 m cop97 sstg)8tln jper wire of diameter 0.40 inch? (The resistivn ls j97stgt8)ity of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in dic* u6o(,vb.ks c5 nhlpameter and 45 m long, if thp.s uh6*c(lcvo k5bn,e resistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of coppev- dwpz4yy:q(c kue4+r wire (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 (resis s,7nj4)q v(bjuq fa2rtivity $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 resistivity?b0q qj)uaf*pl,bl, e4

  Calculate the current tc / d*up+hh+cphrough a 10.0-m long 22 gauge (the radius is 0.321 mm) nichrome h +/dc pu*h+cpwire if it is connected 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 j :kl:2e) v5stwf /hhccross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carries 4000 j w)tfs:c2hkvl /e5h: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 rb9 +8cglom8x fesistivity 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 (re1wfp:qodva+x .+cpw w s q+u:5sistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistance o/,zr2dz3ki0aqvw z6ff $18 \Omega$ 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 coeffrkz agn5,t2k7sr(i ,picient of 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 melt dpzpzw*;l8ae1g( cprd8s70,xakck1 ing point of indium. The resistance of the platinum wire w*pcxds (1 ,zz88p1;a k7gpkar eldc0is $2.000 \; \Omega$ 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 thre1m-9- pwulplqak2-gvb t ;*uough an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. Wha1+qf i 72qmenfti8/ywt current will it draw?

  A 150-W light bulb running on 110 V draws how much cur;m;i+anolwe;a,1u cl0 2ueyek-c/ tnrent?

  What is the nominal resistance of a 100-W light bulb designed 5cv*k(q2 vkabto be used in a 120-V(52bkv kqvc *a circuit?

  A toaster is rated 800 W at 120 V. What is the resistance of its heating ele:h+kn97vaxlqixum ) r 8.vwf1 6a ae4bment?k4bv1)r7:al6ewfv9qnh 8+au a x.mi x

  A 200-W resistor is ratq (ce g85cqjx-i 4jxy:ed at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated at tbz5rh9 1wmyufa* ( *n$1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it ispem h5b29tr uvp /7 zmbw+bq:x.a;mv6 used at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it izaspzx23, f n1s used at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What is its resistad,hlf l ,gw:9ynce?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours, if energ*zef6moaz * (0yoj6l uy costsz*6 *fylm0oozja u6 e( $0.08/kWh?

  How much energy does a 100-W light bulb use ix4nqazc;yx )6 lr q4s8n 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much hei,aqwvgxcm 2.d0)y, 48ywn upat energy is proip8w v0u)yqc,w4 gmxn , 2y.adduced?

  A battery is rated at 12 V ajqhp u51) .+inmir51. lenz nund 160 A-h. How much energy does the battery store?qzle i ) .j1 5pu+.5unn1inrhm

  How much energy does k w:9q*kvosf7 a 25-W soldering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per dayp3e /vf27odifyrl ke3; s2q0c . Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate2c;3oy02 k r s/i fed73lqvpfe the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0 houren)vm 8l/y hnwikr017-vi0a(e 5e llqs per day. If electricity k8q00/n )mn 7e 5- ervalywi1l vih(elcosts 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 cent*r- smj ed;s-g7byo7 2 )hncseral 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.j*d nc7be-s2h;s y )s-7oemg r 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 a8m)(6f c0yqx dns.e i(*fhkjcn electric 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 wid 0.f)f*8 y hek(6nqxmsc (cjill depend on its temperature.) What effect will the repair have on the power dissipated in the heating element?

  14 A of current flows throuxc ;ogzn/ jb6-b:q:pj gh $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costi/xpq hfjjd:k7) yp4(s $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 hasbe cfl 8dy/k- j22fl/qr29yrh 60% efficiency. How much current does it draw from a 120-V l fl9d82j2er bkyr2qfy -/ /hcline? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rms current fl+fs)1ob y tr -bm9,rfbows through tb 9)b ry fomtr+b,-f1shis device?

  A 500-W device is connected to a 120-V ac power source. Whahy0w7v l-j tj:6npxs/t peak current flows througpjjnv6w 7/lhy: sxt-0 h this device?

  A 500-W device is conukc1rr;g p x42m8e6hr0icm0 ya 5ljub5f,gm7 nected to a 120-V ac power source. What is the peak voltage ak8,jbi0 6f; 0r47m1 l xgrcur pu5e2 hmgmayc5cross this device?

  The diameter of a copper wire is 0.081 inch. The maximum safy s7qy15zs l-kknc 3l2e current it can carry (in 3kyy1ls5lcq k 7snz-2order 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 of copper is $8.5 \times 10^{22}$.)