A device that produces electricity by trans-cts :whq *d1fforming chemical energy into electrical enerw*c-dtq: hfs1 gy is called a

  A car battery

  The total amount of charge that passes through a wire's full cross section at j7fu y6ccp: k,7 ;hqwxany point per unit of time is refer;pjkxq,c6fuw: 7h7y cred to as

  The direction of convention current is taken to be4- gmyoa7j+ -fwcfm+ e the direction that

  A coulomb per second is ty/z;cad( 4qw7v5o e9rwkiw4; haxb4,ym a-cyhe same as

  Car batteries are rated in "amp-hours." This is a meag, 9 ehlh vq*p2(a7cqbsure of their

  The resistance of a wire is definesd/g q ll8k8lkv pc:-/d as

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

  The resistance of a wire2x15js camhqwk e 30ui:3bt r; is

  The resistivity of a wire: itt80zi2b2mc qh b3y depends on

  Which conducting material has the lowest resistivity value?wp(9)w)g a3qedsv v/ i

  Consider two copper wires. One,s vg2czc2 y(t has twice the length of the other. How do the resistivities of thes2 ygc,2cv zts(e two wires compare?

  Consider two copper wires. One has twtg; fd54vmfn) c)y)baice the length of the other. How do the resistances o;fa mtbyc) 5f)n )v4dgf these two wires compare?

  Consider two copper wires. One has twixic;do)y ;9tsqy ed; 4ce the cross-sectional area of the other. How do the resistances of thesetdy4ye ;;)s 9;iocx dq two wires compare?

  Consider two copper wires. O r651 3vlt 9jnpol:oqane has twice the length and twice the cross-sectional area of n lov6q3 otrapj:l51 9the other. How do the resistances of these two wires compare?

  The length of a wire is doubled and the radius is doubled. By what factor yh g/ 3swd3l++o lgr3ndoes the resistadw s l33h3/yl+nrggo+nce change?

  How much more resistance g(b;elct:k)675 mfjzw jlx u2does a 1.0 cm diameter rod have compared to a 2.0 cm diameter rod of the samej l;)tmc febwgx:5ul6 7j2kz( length and made of the same material?

  The resistivity of most common mej7ww5evmfy*-4lmm gv2or 9x 0tals

  Negative temperature co 9.nwu:9b dmqrefficients of resistivity

  What is 1 W equivalent to5/vns *z;w g1bz nd8dp?

  A kilowatt-hour is eq* dqq)r:9r pc:cm),jx;0hezcce,ax luivalent to

  If the resistance in a constant voltage circuit 4tl/ qqejm- v,is doubled, the power dissipated by that ci ev/4jmq l,-qtrcuit will

  If the voltage across a circuit of constant resistancer260atfz1)gh frk k r6 is doubled, the power dissiparf61a)fkg0z rr2hkt 6 ted by that circuit will

  If the resistance in a circuit with constant current flo . baaq6hgs/(x nofuk6/6 js:br13l cdwing is doubled, the power dissipated by that cif/d bcq:sxa1j6(sgk6u 3 hlaor. n/ 6brcuit will

  If the current flowing through a circuit of constant resistance is + . p;*zm3qhbie(eugr doubled, the power dissipatedb3impzu ( r*;.+heeg q by that circuit will

  During a power demand, the voltage output is redg wqts6-c2 :jr(fjb4suced by 5.0%. By what percentage is the power on a resistor6g-st4j2bjq:swf( rc affected?

  A current that is sinusoidal with respect to time is referr*uamh2;5* n99op jz2 hkbinwped to as

  Consider two copper wires each carrying a curwep;nfk4m9 7 do q)y2erent 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 in the larger diamet 24one7)kmqwyfed9; per wire is

  Materials in which the resistic t-z2skt4 d )+3*0pcyoqdqv nvity becomes essentially zero at very low temperatures are refe)4ky0 nq -qp t2c3+vzcodd t*srred to as

  What current is flowin6d7m copz .)3*t3(- pbpzeav yqr s,wlg if 0.67 C of charge pass a point in 0.30 s?

  A charge of 12 C passes thro hq3 *)hvy+,djq,ul trgl) xumdx.2e3ugh an electroplating apparatus in 2.0 min. What is the average currenjlvq)xx.)l rt,quhm2 +ug h *e3ddy3,t?

  How much charge must pass by a point in 10 s for the current irv6ortojoq/ 7e2n* 1to 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 imz n 1:oiw6k 02fegb(mf $4.0 \times 10^{16} \; electrons$ 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 cupr2 gbhfo2h4*a cs 2)arrent, has been left on for 10 min. What is the net number of electrons that have pas42c22*a)fro gs hhbapsed through the coffee maker?

  In an electroplating process, it8,sy g/hc*k+s r8tvdx,if:fo is 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 run to deposit this much sil :*vo ,ksrsxg88tcdhf, iyf/+ver? (The silver ions are singly charged, and the atomic weight of silver is 108.)

  What potential difference is required to cause 4.00 A to flow throcsz.th7u , nt*xz5-avugh a resistancetz- z, nx*ts5.v7uahc of 330 W?

  What is the voltage across a 5.0f1h e *1/n7ejwgbj cx*-W resistor if the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. Wnpm 2tu(; 3)tts9t jum;3r ia ybv(t8c-rabq*hat current will flow?

  A light bulb operating at 110 V dra ce*wma(4smc+ws 1.40 A of current. What is its resistance+* (acmcsm4 we?

  A 12-V battery is connected to1mhyq ,ioh lau/bzv3,eoo. 3: a 100-W resistor. How many electrons flow through the wire i :3yeo,oh.oihqz,m /v3 1bauln
1.0 min?

  What is the resistance of 1(fen7qbvm4r.gtl5tn;lc3+, f(ak g/ 5hgg ul.0 m copper wire of diameter 0.40 inch? (The resistivity5u 4k,glmtvhq/5 ncbf. ag (g;3 etln+fg(r7l of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameter omv2u7j r jj-;and 45 m long, if the resimj2 v ;7jj-uorstivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (r.vhg9m86 emgz esistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (resistivity pwbks ub8q//nx;noqp u661r j056jxv$1.68 \times 10^{-8} \; \Omega \cdot m$) 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. xja1juh3 pkt2(5 w1ye1v-aur: d wo-dWhat is its resistivity?

  Calculate the current through a 10.0-msa(2u;an 2vrjg-7o oc long 22 gauge (the radius is 0.321 mm) nichrome wire if it i7 (v-2asn ogura ;2jocs 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 x 2.0 c e,4s9i9e sl.gfhxu7f m. What is the voltage drop along its length when it 4,if9luf ese.9g7 hxscarries 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 of38kod w6wmj v6 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 copnm+*r5x o zva)per 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 retj1n9rp, 0vloqex5 7gsistance 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 coefficien ;5 ws3houq;prt 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 melting recjl ;ph/;z 4point of indium. The resistance ole;/z4j;ph c rf the 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 througn6ssfv0 *f3 dod yh8 ui +s:(rnapn*x)ax:.dyh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. c.7+qb0en zsd*wf k j0What current will it draw?

  A 150-W light bulb running on 110 V draws how much current? t:c*z,uyo4)z ) com1 yihox7s

  What is the nominal resistance of a 100-W light bulb designlkdtd93qi21fq6r+ yc 1 zb as3ed to be used in a 120-V circq33 t6 1aq+dliyd9fb 1scrkz2uit?

  A toaster is rated 800 W at 120 V.;ol,8q(qsjc tpv7br / What is the resistance of its heating element?,;b8o /qrsc jptvl7 (q

  A 200-W resistor is rated k2+,akyd mfz5dwas9 *at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated :09h+bll fs7r frsd4ha y+ s;jat $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is u**cxvryfi 8w1d p)z( tsed at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it is used at0w wg- /vyt+hs 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What is its resistk25kf dm-, i;a5lxk mtance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours, if ener c+xd+ w5*os1siwg *vngy c5xnsdw +1w *o +gsi*vcosts $0.08/kWh?

  How much energy does a 100-W light bulb use in 8.0 hon ,6 r sw05.o7hddzjcyurs?

  A 1500-W heater is connected to a 120-V line for 2.0 hours.rv/ zv0udy v ab235f +ly)z0yj How much heat energy lv+ yzv du z3)bv50ya0f/ jry2is produced?

  A battery is rated at 12 V and 160 36 obknn9zvatlc:7wy kp;3 i3A-h. How much energy does the battery store?v:p 6l3o;3any9z kkt c 7iwb3n

  How much energy does a 25-W soldering iron use in 8.0 :m)c 2la- .dlxruxj* nhours?

  A 100-W driveway light bulb is on 10 hours pox 4kohufchr2 7ufv)9 ejm)3;er day. Assuming the power company charges 10 cents for each kilowff3) ;u7j cukm4xh 2oeovr9h)att-hour of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0 hour; qdbi1b4 ea df0g+a)gs per day. If electricity c41i;)beg 0ad b+qfad gosts 10 cents per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electric bill included theg rhwco lh x/3i:yjc1z8(bi,)uq 6of4 cost 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 hi:1ui oq/y)w(8x,cbc4r z 3j g6lfho 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 generates heat ap5v ez 9oc bhk v:;i5kytxd728i)u8 ict 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 wil 5ivk i8y:x9ec8t2bvcz h7;o u)p5 kidl depend on its temperature.) What effect will the repair have on the power dissipated in the heating element?

  14 A of current flow-wq4eb n.x:v ys through $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs ;rp fz sr0c)q,z4hxg-$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 rwwhv8-mbt -85p4 q appate of 2.0 hp has 60% efficiency. How much current does it5wb - vmwahq4pp- t8p8 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 c 3ise k22q4cr(na 6hgfurrent flows through this deviq ne(i4c 2h36fskg 2arce?

  A 500-W device is connected to a 120-V ac power source. Whaevhw5)y f1c9ev8g pp :drw:0 yt peak current flows through this y1 9w0)g :eyprpwvd:v5ehf8c device?

  A 500-W device is connected to a30mv1t kw;k+ 7u, eskpqcc7ao 120-V ac power source. What is the peak voltage acrokakwvup 7q+;mk37se , c1to0 css this device?

  The diameter of a copper wire is 0.081 inch. The ma78 ufyuribu y irt67(g s mgq 6:kck20s,nf1.qximum safe current it can carry (in order to prevent fire danger in building construction) is 20 A. At this current, what is the drift veloq6gi s y2 t(:uf10uqkysci7g,86kf b r n7m.rucity of the electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)