A device that produces elect0: k-r0+ hvwu uk6tkto*muv;fxfuv .,ricity by transforming chemical energy into electrical enervu;ut,.k :rwk0v60fhvxtko*fu-mu + gy is called a

  A car battery

  The total amount of charge that passes through a wire's full cross seclc6p, v e0de 7pcq,1dption at any point per unit of time peqv,7,c0cddelp1 p 6is referred to as

  The direction of convention current is taken to be the direction i+c v28isld,t that

  A coulomb per second-r2e g8 6ekhn2sp ubb( is the same as

  Car batteries are rated in "amp-hours." This is aoe be 5(5qqiro(f s:6j measure of their

  The resistance of a wire isjd5yc ipd6h57hgsw3, defined as

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

  The resistance of a wire is/;0o 0i sfvshr

  The resistivity of a wire57v: p,e-* o ovw:wcngdpl*l ,e-e itb depends on

  Which conducting material has the lowest resistivity valn 5a6* d-nybnuue?

  Consider two copper wires. One has twice the length of the other. How do the nt,- q ;tn6ummresistivities m-,q u tnmn6t;of these two wires compare?

  Consider two copper wires. One has twice the lll d y7p5jmj9s b d-wmsn1q5/9ength of the other. How do the resistances of these t7bl y95/m s 9ljj-wn5pqdsd1mwo wires compare?

  Consider two copper wires. One h xsg:kxpwfx9u.o)yl s05 obq q9me7 .2as twice the cross-sectional area of the other. How do the resistances of these two wires5x xqe9p.f2omwgy7 .s :)kl0bq osu9x compare?

  Consider two copper wires. One has twice the length dmql6b -a++jg and twice the cross-sectional area of the other. How do the resis-6mda+b l+q gjtances of these two wires compare?

  The length of a wire is doubled and the radius is doubled. By what t.e/ / cpvuh6f .n,vxqfactor does the resistance chan en6 cvtq.px /f.u/v,hge?

  How much more resistance does a 1.0 cm diameter rod have comparex; 8sn,t u4c(f5wyktwbe d:e 9d to a 2.0 cm diameter rod of the same length and made of the same materi;5w 8u( cft9e bs4txnek:,wy dal?

  The resistivity of most coz heb1 z*-k e9j: ip qmz6hnems6pd2+:mmon metals

  Negative temperature coefficients ojza51mkn2bs,; y d8xzodr- i,f resistivity

  What is 1 W equivalent tow.hs 9 na.w6yz5d4src ?

  A kilowatt-hour is ehd oqs in8.689x bqzq;zv 6go3quivalent to

  If the resistance in a constant voltage-s n9keqc89f j circuit is doubled, the power dissipated by thats8k- nfe 99cjq circuit will

  If the voltage across a circuite( ix1rou(1b j+lpg/4ih fg *f of constant resistance is doubled, the power dissipated by that circu eogr4h/1+ gf(x*ipbl (fj1i uit will

  If the resistance in a circuit with constant current b2+j u00abfd aflowing is doubled, the power dissipated by ab+2fbua00 jdthat circuit will

  If the current flowing through a circuit of constant resistance 92svbyn,u x:j:kro qzih9sa)dd2r sg7k8 y ;2is doubled, the power dissipated by that circuit wil 2j2yos 7vbzk9i :ad9dusrx;sq2nkh)r,g 8 :yl

  During a power demand, the voltage output saiq;ijfo 8( k9 w+o/ais reduced by 5.0%. By what percentage is the power on a resistor affectedwof9s;iij /q8 ko a+a(?

  A current that is sinusoidal with respect to timextsg7r x1 492bzhgxb9 is referred to as

  Consider two copper wires each carrying a current of 3.0 A. One wire hastx pb.7d;kot*( j w4ii twice the diameter of the other. The ratio of the drift velocity in the smaller diameter wire to that in the larger di4d o7i *xtpk.w(tbji;ameter wire is

  Materials in which the resistivdw7h0(ixtq 5a9qv/ q5 nxk(j9 6)+floum vzlnity becomes essentially zero at very low temperatures are referred to ( qa nx57lj+tk zioqvv9f wq)h9dl(/5un06xmas

  What current is flowing if 0.67 C of charge/ 9eb zjjkd (/+;vwboh pass a point in 0.30 s?

  A charge of 12 C passes through an electroplati5pfsr aeh 94cz5 (y7dw)l8 lneng apparatus in 2.0 min. What is the an9 szy(l5 fp)hedwc54 la8e7rverage current?

  How much charge must pass by a point in 10 s for the curr u:n57kij.*6ht28loc5 xlq ibi mlo)ment 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 flowikslyevp2 k+/*ya /b 5v60 de zj0tfc4mng 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 bezf c/krsxk6*: en left on for 10 min. What is the net number of electrons that have passed throu6 rz:kcs/f k*xgh the coffee maker?

  In an electroplating process, it is9 3n 77lvbink cy/9vnz desired to deposit 40 mg of silver on a metal part by using a current of 2.0 A. How long must the current be allowed to r3blyn 99vn 7 kzin7vc/un to deposit this much silver? (The silver ions are singly charged, and the atomic weight of silver is 108.)

  What potential difference z-o9 fzu ob4 eg qi:c/86glt0iis required to cause 4.00 A to flow through a resistance of :0le 9iqzg/6oguz4f-oit8b c 330 W?

  What is the voltage across a 5.0-W resistor:k6 *dgrle,6 e2xg(ryf19w muf8 kznq if the current through it is 5.0 A?

  A 4000-W resistor is conn o,1o*5lgpetnected across 220 V. What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is u149963rh 1j( dpsi6 z6 stmq3rdlaod2xbslaits resistance?1rzsr6xabla3ts1 2m 9d 6o sq hd6j3pu4ild9(

  A 12-V battery is connected to a 100-W resistor. How manyweku( u 048bol electrons flow through the w l 0u4(ku8wobeire in
1.0 min?

  What is the resistance of 1.0 m copper wire ofr9l9q z,w sg d9v3 xliy8svlo dvjtf) r+7;+s1 diameter 0.40 inch? (The resistivity of coppr8i)l 7,l jsy1d+lvrdv+9vqf99 t g3oszxw;ser is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm ivoh2kcs7a /5 dn diameter and 45 m long, if the resistivity is 2a5vsh/k 7odc $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper,zf,u+lt:frvgqqau3 5 i hv74 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 (resisv3wj, x 3;nb(: hyfphetivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 m long, measures 0.pt cf2j iyxg)f(g )x,-nx0yo 2040 ohms. What is its resistivity?

  Calculate the current through a 10.0-m long poy;dq4f yw+i6v)z5 q 22 gauge (the radius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. (The resistivity of nic q46+) ;dyw5 ifqzyovphrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long a:3 rqkl,mhn u366v fqand of rectangular cross-section, 1.0 cm x 2.0 cm. What is the voltage dqaf nh6,:r kml3vqu63rop 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 z3fc5xwd:i 5 *f,appt0 ss -uo+r xx2xp/o2qj.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 (resistivi4qa j+:a.0 mtkfl60jyon9jb .r gt 9izty $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistance of cyxt6ai,tm.4;9vo ocy. j e*c$18 \Omega$ 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 odry0mz fz*c 38b,pq/af 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 indium. c s:1-3f4ba jdao4wrf The resistance of the platincr-314 sjd4wo: f aabfum 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 thbb4c 7q q8usyr1c* rh2rough an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. Wrewd1 w.m8fbb7 a*0ft4 x5be g 2cg/vphat current will it draw?

  A 150-W light bulb runnin cqwzv.zgq0 v.1o w7 oahu466cg on 110 V draws how much current?

  What is the nominal resistance of a 100-W ligsh9aa/. sak 72orv8cght bulb designed to be used in a 120-V cir.7hsva2a a89gs/kroccuit?

  A toaster is rated 800 W at 120 V. Whjw2te+k.e2 bam tih5j9po0: xat is the resistance of its heating elementjb:j tompe9w+5tk2.iae2h 0 x?

  A 200-W resistor is ra4mqd* ( ;bf)aj bpk00uocl;pmted at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated a 7j.m i p,.;k)sophvoxt $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what current doeshic 5 lzvq(d:4 5y xx5cug67jx it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is itsj:v mlm+7jce(65iywmm4 heyd:zw t )1 resistance?

  A 25-W soldering iron runs on cvvxq e + 81h2bxt*g7r110 V. What is its resistance?

  How much does it cost to operate a 25-W solderib0 w9xq1d/vupng iron for 8.0 hours, if energy costxq1wb09 dvp u/s $0.08/kWh?

  How much energy does a 100-W light bulb use in 8.0 hoursp 6w* 8tf .p fhl.kl7chq.xpb,?

  A 1500-W heater is connected to a 120-V li+z9s 0plo*qn jne for 2.0 hours. How much heat energy isjon z0s +9qpl* produced?

  A battery is rated at 12 V and 160 A-h. How much) 02l yoff0fdp) bxc)h energy does the battery store?fl) h2py)x )fco0d 0fb

  How much energy does a 25-W sou6r4pn a/nye3 /d/c c .n8coufp/1 hqdldering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming the power ctu3qab6g,d4 + l9mkit ompany charges 10 cents for each kilowatt-hour of electricu+iam3 b lg69t kq4dt,ity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus mog-gd+hl d+d*y nitor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how mucd*+ dyh-+gdglh does it cost to run the computer annually?

  The monthly (30 days) electric bill included the cost of running a h y(flawuct-2v*2mc: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 cocwt-:amy( l*chu2 f2 vntribute to the cost of the monthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element in an electric drier osrh*amtjkjiw8g (,53perates on 240 V and generates heat at the rate of 2.1 kW. The heating element shorts out and, in repairing it, the ownerw*,3is8 5gh(jkjtrma 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 throughpz6r dz,-p;8:az bzrek:eoo n2 *wo9c $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs4do8 u+w7qzyh $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% )d23zmyur1:nl01 kxhmx8cys efficiency. How much current does it draw from a 120-V line? ml1u:dhzr)ky80c xy n1ms3 x2($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rms yexv)u7(c oq uns ,8+c ytv4k1current flows throu ,u1 q xce+kny7tyu48c o)v(svgh this device?

  A 500-W device is connected to a 120-V ac power source. What peak current f kk1)u xie3-vglows through v)x-3eiu kk1 gthis device?

  A 500-W device is connected to a 120-V ac power source. What is*c v;ta)spol o80l,x3 zib v0f the peak voltage across thxv0li),caos3p lt o;*bf0 v 8zis device?

  The diameter of a copper wire is 0.081 inch. The maxifl 3 8)q/ofswwmum safe current it can carry (in order to prevent fire danger in building constructiofw)/ w 3s8lqofn) 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 $8.5 \times 10^{22}$.)