A device that produces electricity by transforming chemical energy indezw)ir9m k.ph l;e(c8 :gd4hto electrical energy is called aw;:4ig m edek).drh9z(pc8 lh

  A car battery

  The total amount of charge that passes through a wire's fe xygrg i op7ji+7o2 raee-891ull cross section at any point per unit of time is referred to ergij eg18xyeio+2a7p 7 o9r- as

  The direction of convention current is takovjvp3* 9 pv(j1j5gtuen to be the direction that

  A coulomb per second is the samejjw;ms-4s )c:ghdfd9 as

  Car batteries are rated in "amp-hoursn xxti5vpb.3xh h.:do)v.i; q." This is a measure of their

  The resistance of a wire is b3.rx 7yqspi 0defined as

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

  The resistance of a wik x*e4tx/ 7xu2gj jh6lre is

  The resistivity of a w ,n2)wsozlh 2ee)e h7c+qqc1 hzd4ia6ire depends on

  Which conducting material .+b+/if . 7hnqlpcxhzl0 3v p8*x oqzmhas the lowest resistivity value?

  Consider two copper wires. One has twice the lengtt la8qgz1;;i)owi o+ 6: w6 e7lmenuakh of the other. How do the resagkz7t6mao8+ ilw n)lq;i:6ou; e we1istivities of these two wires compare?

  Consider two copper wires. One has twice the length of the (k warh:6i k0yb7c o*rother. How do the resistances of these two wires comparb(7kcwa r:i*60y orhke?

  Consider two copper wires. Onpkue0ecxt .1rq w 36,ne has twice the cross-sectional area of the other. How do the resist , .qurpc3tn01w6ekx eances of these two wires compare?

  Consider two copper wir( hqit(o2; 7h;ll)j tidwk* xfes. One has twice the length and twice the cross-sectional area of theij(*;h t (d; kohqt2x7wf ll)i other. How do the resistances of these two wires compare?

  The length of a wire is doubled and the radius is doubled. By what fact 5caa:quz)g,uun y :7mor does the 5ua :ac7)q:zug,ymnu resistance change?

  How much more resistance does a 1.0 cm diameter uo 5m,e85saik rod have compared to a 2.0 cm diameter rod of the same length and made of thek5i,sm 5 8ouae same material?

  The resistivity of most comm7x:sb1x s amv2on metals

  Negative temperature cc )f3ve05wgw woefficients of resistivity

  What is 1 W equivalent t gpf;vsi ns5j4s q/wwv/w: 1toxri9,3o?

  A kilowatt-hour is equivalen/x,ibjmr z 6q y2.y4bmt to

  If the resistance in a constant voltage cd+tmk0(emo4+ lyio/b7t 1 k trhq7 r+rircuit is doubled, the power dissipatedbqtro4 / rt+71+7+kd l(horye0ikmtm by that circuit will

  If the voltage across a circuit ofw/6hpli)h ukjac91,v constant resistance is doubled, the power dissipated uk h/lc,6h)1vj9 iwap by that circuit will

  If the resistance in a circuit with constant current flowing is doubled, the powgv+y:*z-5 on-zk id5f bem+ gner dissipated bymk-dngz *i-+ bfgv:55o +nzye that circuit will

  If the current flowing through a cirzlatz7lgb9)/ p( nbht,bmr etp57bn zm7e,)9cuit of constant resistance is doubled, the powe(t )b97lb btn7,amzrg957ep l zztp ),hneb m/r dissipated by that circuit will

  During a power demand, the m7yqebjez +: fv:d+ .;6b owacvoltage output is reduced by 5.0%. By what percentage is the power on a resistor affectya oj wd qme6+v:bcf+7z: b.e;ed?

  A current that is sinusoidal with respect to time is referr,+acgk ugf8 qc,ip6y (ed to as

  Consider two copper wires each carrying a current of 3.0 A. One wkmvo7tz6 n ) ,jly)uv-ire has twice the diameter of the other. The ratio of the drift velocity6yn-l )tkvzm,ou v7)j in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomes essentially zerc4 la742 8zr vuqhj1rqo at very low temperatures are referred rla qz7c1q4 4vjh28urto as

  What current is flowing if 0.67 C of chwaovr .3 )ta+7cxt,pw*u0hwhw/*puuarge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus in 2.0 min. Wl:s6xz +,2tnaf ,cjpsd/n w f-6l ykbur*1ns8hat is the l+ 2t: 6l ,s,nn/d6ja8wuspnyf-1zc *rsfk xb average current?

  How much charge must pass by a point ht*k bs2:ux t 3yg+qex2i pb47in 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 flowisc.u3 oxhgly 2o 02na-ng 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 fo 9wtftvvoq nzs/q.6.7 r 10 min. What is the net number of electrons that have passed through the ct.6ov fq9/ tnv zs7q.woffee maker?

  In an electroplating process, it is desired to deposit,6bj26opl q rzd+ii: g+i9wul 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++ grwl 6d, z l26iiqbu9opij: silver ions are singly charged, and the atomic weight of silver is 108.)

  What potential differencttjd,i;j, /p qe is required to cause 4.00 A to flow through a resistance of q ;,,tjt dp/ij330 W?

  What is the voltage across a 5.0-W resistor if the current through i+xw .jgh gjb)1gd.yor+ii;h 5t is 5.0 A?

  A 4000-W resistor is connected across5:gz;0gf zsjw0fwxjrga(-9( ; b hh cp 220 V. What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. Whh;cvc1xkaw,1 ylix56 (p7lbq at is its resistance?5y;lbc x6ilvx1pw( q7, 1 ahkc

  A 12-V battery is connected to a 100-W resisch (/af sk2zw1tn-n( btor. How many electrons flow through the wi2bhawn - st(1 fzc/(knre in
1.0 min?

  What is the resistance of 1( .u) g+ d hp empq ev.cdxvsg(c8*ew9(bfk:m;.0 m copper wire of diameter 0.40 inch? (The resistivity of copper mvsf 8uk*);mxcpv 9bwdh.:e( e.gpc (e(dg+ q is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circuld4yzs ,/m(zn 1qx 4zziar rod 1.0 cm in diameter and 45 m long, if the resis1qi4m dz4/,zz yn(sx ztivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resiss:cj yh sg2wfo52-8e xtivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wh q.fdx :51lkxire (resistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) 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. Whaopstm2-d/ ut 2 3,:jbng) dugbt is its resistivity?

  Calculate the current through a 10.0-m yf7em5/d3 xholong 22 gauge (the radius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. (T/35 dx e7ohfmyhe resistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and of rvvl8 9 y,hr3o3any*; rokb0s wectangular cross-section, 1.0 cm x 2.0 cm. What iswnr 0s8 hy9 ov3y3kva*,;olr b 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 resisti6ybyl*0ldzb9 2f4l,cu :v c r-tld+mo vity 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 (resis )vmxf7+:1lxnet) 3n54sh lctftcr 1htivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistan4k n+eug(hhmj5t.) rrce 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 resistivi81 5n9delzytcty 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 t+ 8ow gawpaq18he melting point of indium. The resistance of the platinum wire ia 188awqg+ wpos $2.000 \; \Omega$ 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 throughf g lg x x:m3,mip(94jcxu7)2rfa0l9ilbktw, an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 jbi n; sz.bow* +oh.6sW. What current will it draw?

  A 150-W light bulb running on 110 V draws how much cutlc 5;-;mzypjrrent?

  What is the nominal resistanc7tr1my imcg,mu, i6m)ah )h5/- ksl;bo fgx /ue of a 100-W light bulb designed to be used in a 120yf)xr c kh-as;l)/b/,m76m oig,utg u imm51h-V circuit?

  A toaster is rated 800 W at 120 V. What is the r.+c zvjq 15ocs d1:yduesistance of its heating element?5odc v d1jus 1zc.q+:y

  A 200-W resistor is ramw /uv e,h9my c.*:(vfie0*hnu2 lxsq ted at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ratedllftws yb,f er9ftwd:77//.n at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 Vg7fm( rt)o 5ft, what current does it draw?

  A lamp uses a 150-W bulb. If it is use3g)x;qgs bi 6gd at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What isenf0eb2r*fe+db: oq / its resistance?

  How much does it cost to operate a 25-W solfqj)imh*lba 5 c7 0;-rs ehhn.dering iron for 8.0 hours, if energy cojlhhic *m- a;5qefrn7sb 0h.) sts $0.08/kWh?

  How much energy does a 100-W lig9t-tewoula,) vgf+5he3 fr y)ht bulb use in 8.0 hours?

  A 1500-W heater is connected to f:vod63ob )soc (uj9na 120-V line for 2.0 hours. How much heat energy is producedocos:uj6fv )9 3 (bndo?

  A battery is rated at 12 V and 160 A-h. How much energy does the battery stov1io1w4hwixh6 )m(:aa1 yedy re?mwa 11 yawyi:4oxh he(idv)16

  How much energy does a 25-W soldering iron gh)-jgscjsw:* 9 yrps0l:m o x-1hb)muse in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours 1r+qht 8hq sk.x28odr per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operathxqr8 r.21h+kos8tq de the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0 hours per dh8,mde gck; so /b3f 0yaa5gt+ay. If electricity costs 10 cents per kWh, how much does it cost to run the computer annually?gek,0hd asc 5abgo;f/38yt m+

  The monthly (30 days) electric bill included the cost of running a central air-n b2b(fctk88y)jrv w.vf;w9:y o9xfgconditioning unit for 2.0 hr/day at 5000 W, and a series connection of ten 60 W light jvon gk9cyx 829 8bw () fbvytw.;ffr: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 genmw lf y5bu 1/yn: vu5)i.w28rcnz r(jaerates heat at th2(1n/wy mr.lw 5uz jrci58y fvnba:)ue 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 the power dissipated in the heating element?

  14 A of current flows 0 drc0+jog 36bnq:1ydt/imyc through $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costsk cr*.9fyk2p1f r/ ure $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% e h m,l aixv(76+0ioplk9 -vmaofficiency. How much current does it draw fr,v6xp lhlma709- mko+(oiav iom a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rms curreh/ 9h icap9 4p h2gnp:e2*ohay1ew*x wnt flows through this2inhwap1h /9*h9pey4e wxogc :ah *2p device?

  A 500-W device is connected to a 120-V ac power source. What b.zk4qt7 h*bv (m7bcwpeak current flows through this d 7. ch wbb(mkbv7q4t*zevice?

  A 500-W device is connected to a 120-V ac power source. Wha7c4 yt j3a khb55j9lpat is the peak voltage acatp5j 9 ck53ablyhj 47ross this device?

  The diameter of a copper wire is 0.081 inch. The maximum safe currentapvl-z ,bzuv )fo4w.4 it can carry (in order to prevent fire danger in building construction) is 204ap-l)oz w.vubz v4 ,f A. At this current, what is the drift velocity of the electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)