A device that producennesr 53.kd d:3; rxdms electricity by transforming chemical energy into electrical energy isndrd;e k nm:.ds335x r called a

  A car battery

  The total amount of charge that passes through1a6mmz :i: bzqydw k bo1 cj3prp/l(z0 b.x+l/ a wire's full cross section at any point per uni:z.i1zk dz+mpc w:ylbo3 6xpqlm(b/r1b0aj/ t of time is referred to as

  The direction of conventiopmhxag c0 a,jmb,wd7(43y jloy ,cb25n current is taken to be the direction that

  A coulomb per second is the samektd pc+b twmr3xvm:vx 6kt0 k*5k., f3 as

  Car batteries are rated in "amp-hours." This is a .i0 /mfsw /yahmeasure of their

  The resistance of a wire is defined ; yf.ejn;agt,88 (slsd0q9xmhgm d*u as

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

  The resistance of a kmf(0j:nw8yawire is

  The resistivity of a wire depend nw0b0 1d2,jyc.wfeh3u4f b:bidkf6vs on

  Which conducting materi/fet b:s-g*kqu( il +pe4o-r 2u5dj tgal has the lowest resistivity value?

  Consider two copper wires. 7d ly r)*-lz,z alom6sncv. k( One has twice the length of the other. How do the resistivities*l6d . azomkz)-lys r7c (,vln of these two wires compare?

  Consider two copper wires. One has twice the l9f bee5 hnz yi5,.1-v5jmsuoa ength of the other. How do the resistances of these two wires5zs,5mu je1ey b5-n.h foa9iv compare?

  Consider two copper wires. One has twice the cross-se::+tp xeci vs*5 a2xuactional area of the other. How do the resistances of these two wires c:vtxc+x2au a5 ep:si* ompare?

  Consider two copper wires. One has tw*5tg8akce*bklcy u 7;)x8zuc ice the length and twice the cross-sectional area of the other. How do the resistances of these two wires compa ab*;txk*z cklcu7 g)ec8 uy58re?

  The length of a wire is doubled and the radius is dw uud ;tiebkiy1 *-po zq0,7k3oubled. By what factor does theutqz iu y, b;07diok1k- ew*p3 resistance change?

  How much more resistance does a 1.0 cm diameter rod have compared to a 2.0 cm eu (39hlm6 n9ekccnyzkhg1 7z 44p fp4diameter rod of the same length and made of the samenfz9hukey1h4379 p z4knpc(6l m gce4 material?

  The resistivity of most comlt.2 q5lq7lh uit0/jg/ o 8wjtmon metals

  Negative temperature coefficients of resistivitmz8l zv-pdei mrop3/;9;na* ay

  What is 1 W equivalent. 1fmkeq zwz0 yl-x(h7 to?

  A kilowatt-hour is etjpea (-h.b 8r(d 1ykbquivalent to

  If the resistance in a constf g1,y 7,cnt;kcu 7nqoant voltage circuit is doubled, the power dissipated by that circuit wil nu;yk toq77g1 ncfc,,l

  If the voltage across a circuit of constant resistance is doubled, the v6tw,xg gq c()ci1hf3 power dissipated by that ciri c,g)1 c(x3vw hfgt6qcuit will

  If the resistance in a circuit with cons3+xe f1yng7 sftant current flowing is doubled, the power dissipated by tfe7gx +n1 3ysfhat circuit will

  If the current flowing through a circuit of infb, u3eztuj7oh45sqe y6 , -pis z*/ioda --constant resistance is doubled, the power dissipated by that circuit wilhpua6sz -ef 7y- iboo*s /iu -ent, q5z,j43idl

  During a power demand/+m s/ 11lkbwv scp2of, the voltage output is reduced by 5.0%. By what percentage is the 1c1p2m bs/v /flos+wkpower on a resistor affected?

  A current that is sinusoidal wi*h)bel3 :k j6zj rykrr ,gui25th respect to time is referred to as

  Consider two copper wires each carrying a current of w:g14zd*ep3*/m soc /c,ldjcv dy dr03.0 A. One wire has twice the diameter of the other. The ratio of the drift velocity in the smaller diameter wire to thatd4cd o/j0wdv1/rpc*3d*e ,z ycm gsl: in the larger diameter wire is

  Materials in which the resistivity becomes essentially zero at verrad+. h *rmt 6k-nbo5sy low temperatu6orh+k dn5b.a*s- r tmres are referred to as

  What current is flowing if 0.67 C of charge pass ay r+m c0cstu e+7v5at5 point in 0.30 s?

  A charge of 12 C passes throu -8 hw b8px:mlydd6jc2 c8qxq:gh an electroplating apparatus in 2.0 min. What is the avepm8d8h-y6 lxq w8 bq xjc:c:d2rage current?

  How much charge must pass by a point in 10 s for the current to be nd4u c3coets7 4,vfx wo) e*0q0.50 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 w(3, lei2fdw,4s fhctif $4.0 \times 10^{16} \; electrons$ 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 drrwee+xgag(l ( 8xu1k.aws 13.5 A of current, has been left on for 10 min. What is the net number of electrons that havxree .wx g(l1 kga(+u8e passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg of sl9fmgbg , 5t40a ns+jjilver on a metal part by using a current of 2.0 A. How longjs +0t n9jblga 4gm5f, 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 difference is required to cause 4.+lgz9.-a mw rc00 A to flow through a resistance of -m.az9cl g rw+330 W?

  What is the voltage across a 5.0-W resistor if the current throyfaf1 0hs:x;qugh it is 5.0 A?

  A 4000-W resistor is en87 lqhu/1+luuas9z-d ao5pconnected across 220 V. What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its rysf4u**om5; uz sh v8oesistance?som*us* ofz 8 y;uhv45

  A 12-V battery is connected to a 100-W resistor. How many electu s .plce. ujyygq:g*92 7tl3trons flow through the wire incl9 g.pgq * tj s27yultyu.3:e
1.0 min?

  What is the resistance of 1.0 m copp*tm h nvhuoohbsw46+fsb)63+er wire of diameter 0.40 inch? (The resistiv4)ohnuwovtm+s h 6sbbf6h +*3ity of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameter a .-hh0;qktad nnyt,f1y 7sqrr6xs: o1nd 45 m long, if the resistivity is 1;-d 7y.or qk saxnthn 0:yr,ts1h6qf$1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper x-t*a y/pn st1x lu9 2b oeiik)kfg4 hycj,5+7wire (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 (resistivieyg-ys9m +jp7qrnlw8 **b;q7cha;k r ty $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod,djv5iy to h) + 6/,5,zpjsybzf 4.0 m long, measures 0.040 ohms. What is its resistivity?

  Calculate the current through a 18d;qiikc 9j**e wrd/e0.0-m long 22 gauge (the radius is 0.321 mm) nichrome wire if it is co iw9kdc8ejd*q ;rie* /nnected to a 12.0-V battery. (The resistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 c8xw vmgz.o 1n,m long and of rectangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carries 4000 A? (The resis1.mzv nxo8 wg,tivity of copper is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichrome wire has a radius of 0.23fgahfaj 54)zp li8w7gl lr(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 w hlkaclw;z1-:ire (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 resimnxuu29w lw9 *stance 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 resistivity of q )endql89 gu5platinum 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 rfbx*)y 4.dhf point of indium. The resistance bx .dyhff 4*)rof 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 through 4; b p7klv/se 0m+zykcan $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer i84rm my i/h,ub8zg8ic bw(if 4s rated at 1200 W. What current will it draw?

  A 150-W light bulb running o hww8x7uk ,je-n 110 V draws how much current?

  What is the nominal resistance of a 100-W light bulb designed to be used in arn.y iqr3c xwpl4n 7: cm*f-b9 120-V circuit?*cbx7wc r4mpyq . 3 -9lfrni:n

  A toaster is rated 800 W at 120 x8gz2)7ozssdbw+x3 bV. What is the resistance of its heating element7gz oz+sbb)3xdw8 2xs?

  A 200-W resistor is rated atmr80r nfq8ltdrl 8d c-x-c ,jwb -n9e. $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated a lo17ysu6kknylnd3l0 ,2 jq8ut $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what current doesb4ut:.sd0fya r(yi g8 it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what isep kdnp.7-c*/ *s tgkh its resistance?

  A 25-W soldering iron runs on 110 Vm; e2 fq(srr( nql3xu0. What is its resistance?

  How much does it cost to operate a 25-W soldering x( yn6u vrh/w:iron for 8.0 hours, if energy cou6x( :wnryhv/sts $0.08/kWh?

  How much energy does a 100-W light bulbobj1b3 zghb,m8 i7m ;d use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much heat energflpsz8k) a8 5 o j5vg6mlvk4s7(4gmqty is5mkj 6z8s4 g8o(vsglav q7)fpt4m5kl produced?

  A battery is rated at 12 V and 160 A-h. How much energy does the battery stc14 o5jgogvuk+ bw,( l .7dopvore?w1 l,bg7jvu koo4+do5vg.pc (

  How much energy does a 25-W soldering iron i eimeyl5x0--use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assri/golbic26ae s 52+v uming the power company charges 10 cents for each kilowatt-hour o sr al+i2 vig/e5o2bc6f electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0 hours per day. 01 ;,xdne/b)ei9.ntzhz ga fh If electricity costs 10 cents per kWh, how much does it cost to run theb zhh,)xge n9a1zd/;0f en .it computer annually?

  The monthly (30 days) electric bill included the cost of running a 5va7c gkxb;/zcentral 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 contribute to the cost of the monthly electric bill if electricity costs7/c5z bxkavg ; 8.0 cents per kWh?

  The heating element in an electric drier operates on 240 V and gene8waijsz g-u/ (v +e6qhtm9g)b pac7, brates heat at the rate of 2.1 kW. The heat( vtq9jp zaihw+ m6e/u7a8b-b,)g c sging 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 th-nxuj0 fc(h1jtp 97 q*t(htjrrough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs ywc;xj.wod85+;e ma2k li6 xu$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 much cuxb6 ( e+fpvsjz;,*e+s -ieb9riqmd .ds.gn z2rrent does it draw from a 1ss+ egq+b,isdzi-d2 n(.exm* j;96 rb .pzevf20-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac d2sv*wx/onzcv9v.k 9 power source. What rms current flows through tcdox2*9v 9swvvnz. k/his device?

  A 500-W device is connected to 8ta2a qo *s6zha 120-V ac power source. What peak current flows thras8qh z* t2ao6ough this device?

  A 500-W device is connected to a 120-V ac gta)3b,8*b3i;uzn7r a fjgyv power source. What is the peak voltage zb*b y)a j3tv ,nagr8;3 7gufiacross this device?

  The diameter of a copper wire is 0.081 inch. The maximum saf. 531:ca.j8;gcrp q 3vqccx,jmu qpile current it can carry (in order to prevent fire q3;8c mr.1ul,.gp53j i pcqq acvjc:x 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 $8.5 \times 10^{22}$.)