A device that produces electricity by transforming chemickl- e0 cjqbdm.d)ogqv;4lx+0s f(w0l al energy into electricallb0w dfdj)4mvg-;0l .esqc(+q x 0kol energy is called a

  A car battery

  The total amount of charge that passes through a wire's full cross ser1s9yt/;6c0wef;6:ez6lqfno f pq i nction at any point6t s 6q li9feroe0n61w:fq;; zfnc/py per unit of time is referred to as

  The direction of convention current qw/v */x vuh6vis taken to be the direction that

  A coulomb per second is /.(rh ;nix2byr , zj nk2y7yan+e1anqq3a-v x the same as

  Car batteries are rated in "amp-hours." This is atf b a +ix+prh5j *e/0 wi)o-).q:zmq:zcof lc measure of their

  The resistance of a wire is defined as k0qnyzqn/,k cs 7r6;2w0j5 mynw *vlx

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

  The resistance of a wire ic96p2gerxurw+e-+0 3 vsge b gs

  The resistivity of alg .0l zhfqd34lbxsujfu71s0 i2h f5/ wire depends on

  Which conducting materia 3-dcluroln ya x:76p9bfy-j7l has the lowest resistivity value?

  Consider two copper mu 5jj35,t1wht3o8gsl mua. awires. One has twice the length of the other. How do the resistivities of thesj.s w5t,m3ujl a t5 ug31amho8e two wires compare?

  Consider two copper wires.wx)q4(0 a gdg)wxq4wx gkn qqz24yr: n c4iv1+ One has twice the length of the other. How do the resistances of thani 1x2xwqq+:zy ) d4vn(w q c) r04ggk44gqxwese two wires compare?

  Consider two copper wires. One has twice the cross-sectional9ei7urzdb 3) v md 702zbbcf/g area of the other. How do the resistances of these b7zg0vc9b7m/id d)b2fzru e3 two wires compare?

  Consider two copper wires. One has twice the l4dl,px esnho6fe byk(p3 ): 2hength and twice the cross-sectional area of the other. How do46n)f2e hes :ydo x3k(pbphl, the resistances of these two wires compare?

  The length of a wire is doubled and the radius v4qv ) fd:( cks o1.)ewij9njjl jqg8-is doubled. By what factor does -v jcw).ngj(qjsjd li k4fe)8qv9o:1 the resistance change?

  How much more resistance does a 1.0 cm diameter rod have comparenmtn qt7 c7h 7lkr)qc,os4a,4d to a 2.0 cm diameter rod of the same length and made of the same man,4athk7 c),c477 q mlrto nsqterial?

  The resistivity of most comqz,/m b k e*q.jum*9+j*o ir-x+ban simon metals

  Negative temperature coefficienwbioo fi;. ,un e jh(gb*h m(4b2i2qa*ts of resistivity

  What is 1 W equivalent dq( gamr3 qb:p1st;h 4to?

  A kilowatt-hour is equiv6 hm++eh 3fb6g9huuncalent to

  If the resistance in a constant t1(hhd5q 0e9gy.(amg qbn:m avoltage circuit is doubled, the power dissipated by that circu59am:q y(g1.ae mb(dq n0h gthit will

  If the voltage across a circuit of constant resistance is op1ju 7 4z.cinph /bq3doubled, the power dissipatedh/43ci7 1pojnz. pbu q by that circuit will

  If the resistance in a vflljsa 8g 5aa aec6;s1t+s oe-j*5o3 circuit with constant current flowing is doubled, the power di- o+as1eftv6;5j5l38cjo*aa ss lagessipated by that circuit will

  If the current flowing through a o x1djp :0zigicr4rk 29y/n, ecircuit of constant resistance is doubled, the pow,jz41ride:2 /0ogpn9y kxicrer dissipated by that circuit will

  During a power demand, the voltage output is reduced by 5g l g44d;ca9e ,+kucfc.0%. By what percentage is the power on a resistorg dk 4c uc,aflc94;ge+ affected?

  A current that is sinusoidal wh/;j ml5vn/d* ubpz +eith respect to time is referred to as

  Consider two copper wires each carrying a curywzg gb l.b5o6lt *;m7yqb5s uwz*i07rent of 3.0 A. One wire has twice the diameter of the other. The ratio of the drift vu.*bly5i76 s5gqy olg *zw7wbt;b0m z elocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity h- pe dv 4poeof/g* vq1l(l6mp)n8(avbecomes essentially zero at very low temperatures are v m/ p86a- q1ove fldohep()pv*nlg4 (referred to as

  What current is flowing if 0.67 C of charge pass a point 8m*z h9y, 3oc8ytitbv in 0.30 s?

  A charge of 12 C passes through an eleci l6ia8d n b4ios5sw9)troplating apparatus in 2.0 min. What isn il85)69oswb4siida the average current?

  How much charge must pass by a point in 10 s for the currezdl0kpggo -l 9uw,ih w.,43krnt 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 flowingw-bt rg/ :r3mfqd8x0h 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 currents3 /tquawh3a ( -fnr/p qj77lb, has been left on for 10 min. What is the net number of electrons that/w7(lh7 s3 3tqabfnr aj -uq/p have passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg of silver o9/eh 75ef v0 hpbzso5on 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 charged, and the atomic weight of silver iso 95e0bo7h5v /sefzhp 108.)

  What potential difference is required to cause 4.00 k /e,yrp4xl *mo9(k ukA to flow through a resistance o mlruykx*ope4 k9(,k/f 330 W?

  What is the voltage across a 5.0-W resiqb:yuo 03:i19uw : yxkd/rrn tv7ury 4stor if the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What current will flow md-j-tn.sb8q xw 3yu67ip /pxjy*w3w?

  A light bulb operating at 110 V draws 1.40 A of currenk nc1 9d48hascsi fb99t. What is its resistance?cskbf dan98 4hs9c1i9

  A 12-V battery is connected to a 100-W resistor. How many electrons flh 4/.a zfskvg5ow through the wire .a fg/h5vkz4s in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0.40 inch? (The(jhcd-4 d7pne) u on)u resistivityuen)()4dpn 7 -chjo du of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameter and 45 m long,8msv7lb. *jvy if the resistivityv.7sv8*j lm by is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of coppe8, byqqzvlv cfty3;)o +dc /;hr 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 kd4)uuv. esyu6 n 3vi:wire (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-ok g2v1ty,e:x)mjyeyo *q y 6.040 ohms. What is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge (the radi.;z.ls 38+wo 7j sse5df*afx t a9tpvjus is 0.321 mm) nichrome wir9ls.d 7asf zpvf85*jt o. x +ajs3;wtee if it is 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 rectaaf10-j:ugl(7vsc:t . i zafxqt 2wn0gngular cross-section, 1.0 cm x 2.0 cm. What is the voltag a7 2gsj a.:qc0(tit10lvn:-fzgux fwe 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 o0sp4fl,/sj yyw;7tsb f 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 copper wire l :; 2fs7emmv*uo.o:oy6xkc w(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 ;or(y6q4 .wpuoraf3 gresistance 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 zky,1d, ngnustelq47 r98vs2 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 deter ftl3o.kkd3;u mine the melting point of indium. The resistance of the pl ;3k3du f.toklatinum 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 th-zk) gnq 7mc(wkw vh/(rough an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. )vh35udy(d e x, w,oylWhat current will it draw?

  A 150-W light bulb running on 110 V draws how much c,o,v*sd e1/if+f dp 6 flic8scurrent?

  What is the nominal resistance of a 100-W light bulb designed t 8)xfu(/dw fbvo be used in a 12u(8x) wvf/fdb0-V circuit?

  A toaster is rated 800 W at 120 V. What is the resistance of its heati dn:hv1y* r2 wv+ vo)ta13z-d gfzr kt7gj3(rsng element? 371 a y2gzh3-r*koj s(rrt1d: +vtvdzfvwn )g

  A 200-W resistor is rate c)ncl 6w8hf* an3xad3+q1ibpd at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ratxwibe4n) :2jpd1(umv3 m2+sbgzw-f led at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used h s-xdg -ar8e-at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, wh2ykapj,wkd bx2 m)a9ch83j5 u at is its resistance?

  A 25-W soldering iron runs on 1yb;b l;(cjr:koj ::ul 10 V. What is its resistance?

  How much does it cost to operate a 25-W soldering iron for 8, lqhxjh9hjn1-o s(b. .0 hours, if energy l1q, .o -snj(bh9hxjhcosts $0.08/kWh?

  How much energy does a40e+ zu/g kqf7vvian8 100-W light bulb use in 8.0 hours?

  A 1500-W heater is coo kd9lo ,vym eh7u:)r8g5w3iqnnected to a 120-V line for 2.0 hours. How much heat energy isok7 rgq )9uv:o 8e y5d3hwmi,l produced?

  A battery is rated at 12 V and sy2vz1, j;)hvcf7 gks7b b)bx160 A-h. How much energy does the battery store?gk1fs xyzv)bsbv,)h 2; cb7j7

  How much energy doesk.reo(.k66u rn ogp* vk6xbn / a 25-W soldering iron use in 8.0 hours?

  A 100-W driveway light bulb is -b.t.*f;rdjegln ) pxon 10 hours per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the d - bptngl);e.*xrjf. annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 92xdv em 8lz5:ab zhu-8.0 hours per day. If electricity costs db29:axev8zz h5m-ul10 cents per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electric bill included the cost of runnl3,t /ke:j bzning a central air-conditioning unit for 2.0 hr/day at b e, ztl:3kn/j5000 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 costs 8.0 cents per kWh?

  The heating element in an electric drier operates on 240 V and generate3zqqe tr4y7j b6bdc,0 rzp :d/s heat at the rate of 2.1 kW. The heating element shorts out and, in repairing it, the owner shortens tr46q0 e c:j/zbrbdzy p 73tq,dhe 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 ya w(k/osnq8-r0l jjbjc9,+p through $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costlk.tjx e 90/s au9(8iohyp9gds $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 ws(5yrdj 88pa./.hu nnolq v u/ork at the rate of 2.0 hp has 60% efficiency. How much current does it dra5 oh/pa/u yljv8 nqn(8u.sdr.w from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rms current flowdxt93dmc )l e;kfi3 1os through thx9f3i d t;mc1kl)eo3dis device?

  A 500-W device is connected to a 120-V03 ,hjpa 9whvu yv9:l f,3iwfv ac power source. What peak current flows through thi, u,w:v 3hfp3fv0lvy9ihw9ajs device?

  A 500-W device is connected to a 120-V ac p 8kji+xgox zs;vf(,s1 ower source. What is the peak voltage across this devix1z 8fg o(s;+jksivx,ce?

  The diameter of a copper wire is 0.081 inch. The maximum safe current iqens8f 3mqe 8-t can carry (in order to pfesmq q883en- revent 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 cubic centimeter of copper is $8.5 \times 10^{22}$.)