A device that produces electricity by t zy e)r k:jwp+37q 5o)ehcco/sransforming chemical energy into electrical energy is cph/ :eo5r +c e)kq7ozsc)3yjwalled a

  A car battery

  The total amount of charge that passes through a wire's full cross secti6pz4k 0 1ybixkuu3gln q;x 3h2on at any point per unit of time is referred0 n3xbh gkqpuxyz34i6 kl;12u to as

  The direction of con3g t imj461j:wozk9xd vention current is taken to be the direction that

  A coulomb per second is the same asia(o7u xvr )vr.m g.8y

  Car batteries are rated in "amp-hours." zx* r.kb8*7u wllaz7kThis is a measure of their

  The resistance of a wire is dtag-jp,bxw3 3/ hmr3 mefined as

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

  The resistance of a wire if6avdye9d+ 4v s

  The resistivity of a )g0yq7ieq0vc i9dnthwc b ac /h47i .,wire depends on

  Which conducting material has the lowest r.nl-cc 2 yupb8esistivity value?

  Consider two copper wires. One has twice the length of the other. mb :d s0yw 0oz(44cm7zn:plof How do the resistivities of these two wires comparl :s7zmfnw m (0dzoopb:4y4c0e?

  Consider two copper wires. One has twice the length of tlf epn 4, :p,+na*sjuslhg;ros /z:- she other. How do the resistances of t:spl -4; ghjun,e/o:pfzslna *s ,sr+hese two wires compare?

  Consider two copper wires. One has twice the cross-sectional area of the ot ( bh*wyv ibatg/ka fr+pr1,4)her. How do tbyk/rat,r)(v i abwh 1*gf+p4he resistances of these two wires compare?

  Consider two copper wires. One has twice the length and twice the croyiwen 7 g sjb3hwx687*a, ao)uss-sectionyhso6ex78ng3u ,7*ba jawiw )al area of the other. How do the resistances of these two wires compare?

  The length of a wire is doubled and the radius is doubly;wys d(bg/k5 kpzia z99lf1 2ed. By what factor does the5kl kz a pbi2(d yfz;sw1gy9/9 resistance change?

  How much more resistance does a 1.0 cm diameter rod have compare6 g r-hp ixh-6orwp/3vm 9co8dd to a 2.0 cm diameter rod of the same length and made of theowoh p p 3g-r/hdx9mc6 8iv-6r same material?

  The resistivity of most commow m t l+(tg3/ai5rdl5 bcph,.qn metals

  Negative temperature coefficients of rei )bsentxr+ 5zi 504kwsistivity

  What is 1 W equivalent tp tlr+kyen1 )*o?

  A kilowatt-hour is equivalent to dzx3 buy*b8*gch)a3v

  If the resistance in a constant v5j4c g uz-d+czoltage circuit is doubled, the power dissipated by jz4uzc d+cg5- that circuit will

  If the voltage across a circuit of constant resistance is doubled, the p z3;.*:0odmmh brxw+ vaxoe*j ower dissipated ;:*jv o+. mwzexb0 *admorx3hby that circuit will

  If the resistance in a circuit with constant current flowing(l+ xqk wl /6jy lle;-(nt2zsx is doubled, the power dissipated by that circuit wse ;((llyq2kx/ - zxtjl +6lwnill

  If the current flowing through a circuit of constant resistance is doubled,/g rcvm:5ke;r6 y1pay+qy x8w the power dissipated by that circuit:ay5ecxgpkr vq1 y;r+ym6/ w8 will

  During a power demand, the voltage output is reduced by 5.0%. By what percez 5+ 0r9deci +j la*al)wjz)jgntage is the pow+ e lajlj i r5azgc)9d*)z0w+jer on a resistor affected?

  A current that is sinusoidal with respect to (007dehmjoey7*ye mcxv4:m u lot q9. time is referred to as

  Consider two copper wires each carrying a y99ieszq6k-k8 xcgw/ ev 8ku8wq58 emcurrent of 3.0 A. One wire has twice the diameter of the other. The ratio of the drift velocity in the smaller diameter wire to that eqc-6yuk 88 xgw8k8 zeq 9i/wk9ves5min the larger diameter wire is

  Materials in which the resistivity becomes essentially zer5mfb 7,tav+cmo at very low temperatures are referred to a, mtbc+m5f7 avs

  What current is flowing if 0.67 C of charge pass a point in 0.30cln 2al)4gj1 (xa+gvc s?

  A charge of 12 C passes througsyr( w )ct2qz6h an electroplating apparatus in 2.0 min. What is the average current2cqtr 6() szwy?

  How much charge must pass by a point in 10 s for the current to be 0.50 s;lhuxy3xt-n) 9o ,5 nbl9kd l lpe+1wA?

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

  What current is flowi(e( spoh d)rz p7*mns e:v;3wnng 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 fp( jg7bdm--hpl9j/mf* j5nwfhd .: u draws 13.5 A of current, has been left on for 10 min. What is the net number of electrons that have passed p- u dph7(n*b 59ml/-f: mwgjdjjffh.through the coffee maker?

  In an electroplating process, it is desired to deposi lqrn- 558 jun2zx5dwot 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 silver ions are singly chq2xnw lu8dr55-nz5 j oarged, and the atomic weight of silver is 108.)

  What potential difference isfd30aev y5f( z required to cause 4.00 A to flow through a resistane3 y 5ffzva(0dce of 330 W?

  What is the voltage across a 5.0-W resistor if the current through it is 5.0 fw1 j05f gubfnrb/+hw6t m:5aA?

  A 4000-W resistor is connecte sttr6aou82 w/e 6:rdwd across 220 V. What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What ie;bp 33w sj.)+qna 1:vkn d/yi kuc1ans its resistance jk/;q)unp c1w1s+vbka3a: dyen.n3 i?

  A 12-V battery is connected to a 100-W resistor. How many elect rt w6npved1 3xk2*lm4rons flow through the wire in2nde*r 1 l63wv4m xtpk
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0.40 in;c ck gy9p;s2wch? (The resistivity ;2 pw9cgksc ;yof copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in di 9 bl*gkln5u kwybhr j302kb/6ameter and 45 m long, if thky3rku/wh bjgn29*l bk l5b 06e resistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of coppe/n w)ey1mr ;jaj6/kayr 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 ( nkx-lt:/ 1ienresistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 resi6r 4hw mufbg/0stivity?

  Calculate the current through a 10.0-m long 22lk; 6,d,yt kav gauge (the radius is 0.321 mm) nichrome wire if it il6 t,kdv;, ykas 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 cross-section, 1.0 cm xmeyi r1:zom .4yw;m8 q 2.0 cm. What is the voltage drop along its length when it c.ymm :4zi18myw e;rq oarries 4000 A? (The resistivity of copper is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichromhg/dtm9m9e9 d e wire has a radius 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 coppelo8l tdm ny8 xp3((q/ir wire (resistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistance o+c4n ,z fapx-mf $18 \Omega$ 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 of plat httyq)u7 uk188 uyn5+fole k*inum 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 poin1aeq:ljfh 6x ;t of indium. The resistance of the platixhefl:j1aq ;6 num 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 throxt7s6v9ydr 7 fjzm g4.ugh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What currenkmhft qx e .0b4bx*z3gl:ld0)t will it draw?

  A 150-W light bulb running on 110 V draws how much mq9 e/eo2 m-xwrzq c /.d1vjj4k3c:tccurrent?

  What is the nominal resistance of a 100-W lu) i28nhoisopzlho) 2.e.469 rau n qlight bulb designed to be used in a 120-V ci .elup2ir 4z8.)lsohoq9uhn2 i6)n aorcuit?

  A toaster is rated 800 W at 120 V. What is the (9t hgd(nk,0y 8tnvueresistance of its heating elemen9,ted v(0u ghn(8yt nkt?

  A 200-W resistor is ratj :j+ -ui uel.hek0ea(ed at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is r.nxz(0 ;w3 /pmcwnfm sated at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used a3 6dqybo4hk2 st 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it isu(s3/ xdkb9m f used at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What is in*h .55ounc hits resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours, if energy urp ) x 8kkclsq.,8uf5cos5 kxur uf p8q)c8l.sk,ts $0.08/kWh?

  How much energy does a 1 p:0qcu3bsosqjjvy5np 2* ,yt utst:, 9 gqi2;00-W light bulb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hoursvv,k0)yb r5 e1brg)m g. How much heat energy is produce e),bmrg)vykr 0b51v gd?

  A battery is rated at 12 V and 160 A-h. How much energy does the battery st e)k:ya++x :(uorc g+1,vlph8puasnbore? spnp1l:u)v(++ : ruxkao+gb c8eya h,

  How much energy does a 25-W soldering iro0jgw;ygpe h7, n use in 8.0 hours?

  A 100-W driveway light bulb is on 10 houbi8;xg4 ufjt8 rs per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate thxbg8i8 4f ;tjue bulb.

  A 400-W computer (computer plus monitor) ispz4fip1i. 0b s turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to ruszpi.pi140fb n the computer annually?

  The monthly (30 days) electric bill includ0 nl ;s5 vbn t*kaa8xlz0f-z/aed the cost of running a central air-conditioning unit for 2.0 hr/day at 5000 W, and a series connectabl8v f 0z-sz*nna;l/k0xa t5 ion of ten 60 W light 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 operateaj2fg q +cluja0r ym2*ksm )(1s 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 unchange2)(*jjrm cu0yk+l 1ma aqf 2gsd. 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 thivptb(mi.51ym )f e9urough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costsz r3t.lryi-b, $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% efficiency. How mucf.wn3v2.m 93 zy8kvcq-i kjofjdof*,h current does it draw from a 120-V ciwzd3 8ofjfm9n ,oy.kk3j*.v f-v2q line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected nxeujk:3gqpw +m 03z g( ei9s3a2 hq7fto a 120-V ac power source. What rms current flows througf2 3e kxq0je3q i7p+:(wng ma9sz3hg uh this device?

  A 500-W device is conne.f60rfj ei i;hcted to a 120-V ac power source. What peak current flows thr.ih; r6feif j0ough this device?

  A 500-W device is connected to a 120-V ac power source. What is thp,*v kwc6ogh 51b xdk+ikd62he peak voltage * gk1 kdwbc66o vipx+hdkh25, across this device?

  The diameter of a copper wire is 0.081 inch. The ma o1d+zim w.djs2rc:tt:b0 iy 8ximum safe current it can carry (in order 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 cuijd0c :myb r:ws8o1 .t2ti+z dbic centimeter of copper is $8.5 \times 10^{22}$.)