A device that produces electricity d0y6+* e3w9tyij qbugby transforming chemical energy into electrical energy is ed03*96qbi+ ygj u ytwcalled a

  A car battery

  The total amount of charge that passes through a wire's full cross section p/+ad 4aqe:zkq9p8n x at any point per unit of time is referred tp8x dz49p /q+a:q ekano as

  The direction of convention current is taken to be s )s5q .ukbpr,the direction that

  A coulomb per second is tw,etmugcg ,rvz 8, +d1he same as

  Car batteries are rated in "2gw k3eqyla6jdhe 26pt 0 (jz0amp-hours." This is a measure of their

  The resistance of a yk;w/r wye;*pwire is defined as

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

  The resistance of a wire)*i7uo1 u :sl;icap iz is

  The resistivity of a wire de(zxe,qf / vc-jpends on

  Which conducting materieltj (w11dj 2lsly62m al has the lowest resistivity value?

  Consider two copper wires. One has twice thevuc6 q4omq sr2 x(nb)5poh 8-q length of the other. How do the resistivities of thesenrv)umq8q 2 5ox h-s4qpbc6o( two wires compare?

  Consider two copper wires. One has dky l 5)r/sftvf,;0+*ese kmj 3rmu8m twice the length of the other. How do the resistances of these t,yr+v)s3 ju*f k/d0fe5trlsmem;8mkwo wires compare?

  Consider two copper wires. One has 0 5:ql 9d,wo itqrgt(btwice the cross-sectional area of the other. Hidqw, tqbgr5(l t:0o9ow do the resistances of these two wires compare?

  Consider two copper wires. One has twice the lengvb m 6ymj*;l2i39oy jbth and twice the cross-sectional area of the other. How do the re*bmm6o3v9y; 2jl jb iysistances of these two wires compare?

  The length of a wire isfz rtboqxzi+/( ;e4:b doubled and the radius is doubled. By what factor does the resistance chang(:b ;/r+e zb4itqfozxe?

  How much more resistance does a 1.0 cm diameter v -1j8q7gf utlrod have compared to a 2.0 cm diameter rod of the same length and made of the same material?1-u tl jqgf87v

  The resistivity of most common megcab+9*u ;wsw ;g.n artals

  Negative temperature coefficients of resistivitxia92n - dqod)o9d4 bly

  What is 1 W equivalent to? gc3v.s/lyajm- mn4,l2 jt7 jg

  A kilowatt-hour is euwe gln)0.s4 -2 eb siy6wc;;t+ohdtzquivalent to

  If the resistance in a constant voltage circuit is doubled, th y 6bg43o ct63enfm )l(ao;cefe power dissipated mc36 o fcona6t(4;e3)yle gbf by that circuit will

  If the voltage across a cir xe b7iay1.iw);rs:lqxgt00 j cuit of constant resistance is doubled, the power dissipated by that e0yqi t17ia.l 0b )s:rx ;wjxgcircuit will

  If the resistance in a circuit with constant current flowing is doubled, the ))cz .v1nco hopower dissipated by that cin c.)h )ozcov1rcuit will

  If the current flowing through a circuit of consta *tpi-;cel6-udx y 71ad 1tod kq)4uwnnt resistance is doubled, the power dissipated u6yd-coa*71 w dt) p;-qxd14ln iutkeby that circuit will

  During a power demand, the voltage output is reducempjv. 6gy64h7 *nurq 5olis4kz + ibg:d by 5.0%. By what percentagkj* 46nz. s4 o+lu5gigvy m7 pqh6:irbe is the power on a resistor affected?

  A current that is sinusoidal withs)u 0fzx o0f8l respect to time is referred to as

  Consider two copper wires e zy+k zo:c);dvach carrying a current of 3.0 A. One wire has twice the diameter of the other. The rakc+v; ydo) zz:tio of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivitl6ozia-xn s5,y becomes essentially zero at very low temperatures ai6 lsxn,aoz- 5re referred to as

  What current is flowing if 0.67 Cryc9 jy a.(q6m of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electrop o82c1 m0xevmt(6jlqjlating apparatus in 2.0 min. What is the average current?eomj vq28x1ml ( c0jt6

  How much charge must pass by a b o7 yu8bu4+gwpoint in 10 s for the current 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 flowing 3afbcq*cn7y /szin31 5:gl yp 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 dra 80b+rt,ab)/da.p:gco cd:/bk pbc owws 13.5 A of current, has been left on for 10 min. What bpo,0r a p.+)tcbc:g/a:c/ bwo 8dkdb is the net number of electrons that have passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg of silvdceqfyj8;+y;0 .eia ab-mje * er on a metal part by using a current of 2b.a ej;jey-mydq 8;icf0*+ ea .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 is 108.)

  What potential difference is required to c2 cpv p.:)2lq4poovhiud6g9j ause 4.00 A to flow through a resistance of 33v2.d iq2p:gv6ho pl9 o 4jp)cu0 W?

  What is the voltage across a 5.0-W resistor if the curreohhsn).2:vigredj wj .xp2 8/nt through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. h3k1 8on2)-(8 boj xgskbiflw What current will flow?

  A light bulb operating at 110 V draws 1.40 A of curjvsofw9m2f3 c 7*)xm2lfvh5 erent. What is its resistance? wsc7m vmoff v *ex)59j2f2l3h

  A 12-V battery is connected to a 100-W resistor. How many electkfm* yt1 ( 9o/u*vptj5xbcly (rons flow through the wire incub lxo(fvt*1p5y* t(jmk9 /y
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0.40 inch?u1 gi 9o bg.pk8c- j;aheav.9ndm 5z0h (The resistivih 0 1a9ca- ; ngejp mb..gi58hdzouv9kty of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistan811 wcuv/g kr3 za1g hz0uc.p hub-2mxce of a circular rod 1.0 cm in diameter and 45 m long, if thewk0 vxchg / zhu- apc8gr 21z11b.3muu resistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (re 6sciam(93woi sistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (resistic4z g.fn33 vza.gqpj* dj;6 xjvity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 m long,ga *de ,vc0*nk7gbi; qqd(i/a5 *hwf u measures 0.040 ohms. What is its resistivity?

  Calculate the current through aeb+z x+z sir lp,,9j :kpxs):a 10.0-m long 22 gauge (the radius is 0.321 mm) nichrome wire,s a+x sxp:j z),e9bipl :k+zr 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 cmj stp7/w 59mwl 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? (Tj9wp/ w75lmtshe resistivity of copper is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nicm: 9b(n;t9y, sgzkbko hrome 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 coh2ky crxde**o6syoh7 swu pr, / 7ug o1l13gt(pper 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 ;j/*k tk/ kzodresistance 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 coefficie ptsl)b.f*,f+ iyppccie8 uk*/*t.p w nt 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 meltyc w)jxnw 84n19h wlf)ing point of indium. The resistance of the platinf 91))xwww4l8hyjn n cum 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 thr8z dxyha0c 79(geacz2ough an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current.:kk9 j)z.iwtih m ek* will it draw?

  A 150-W light bulb running on 110 V draws how mucf(0y0t u(1rj ,z+ohx + gz7 oj+hjmgyfh current?

  What is the nominal resistance of a 100-W light bulb designed to kkb0e ./4dtv a:/ bprhbe used in a 120-4dk ebbahtv/ /:0k.prV circuit?

  A toaster is rated 800 W at 120 V. What is the resistance of its hzq8(w/tycxk8*e aq 1teating elemenk* 1eyx aw8tt( qzq8/ct?

  A 200-W resistor is rat9 x byav- :x5gt8mqe9hed at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is 3db0)z 7,bui fxl ng/-r 2i*hjrdn:io rated at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what current a/wtmh gk7i*; 5jhn m)does it draw?

  A lamp uses a 150-W bulb. xv;5rh*zuro 74hpa1a;:l kz vIf it is used at 120 V, what is its resistance?

  A 25-W soldering iron ruckxwv7slm f-1og -13 qns on 110 V. What is its resistance?

  How much does it cost to operav6nez pf- bg o ;s-9l)+rvk3rggtsu:5 te a 25-W soldering iron for 8.0 hours, if energy costs bpo) s5zslg-96 v g:vrf-t 3;kegn +ru$0.08/kWh?

  How much energy does a 100-W light bulb use in 8. ; ;8b ukehfvfv8)qbovg,+gr( 0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much heat 7nvo:e+fk. 2 a einxm q;cc3qsmp 6)v7vz-w/yenergy is p e2mmveosfci +yn 7-pa)q;:vx6k/3 zq .v7nwcroduced?

  A battery is rated at 12 V and 16nwwu xg9vz s4w73q8om/u vl28 0 A-h. How much energy does the battery store?uw z/wg3 sn2xw o qulv7848v9m

  How much energy does a 25-W soldering iron use in 8.0 houra twi qc(hqq1l3,b/;ys?

  A 100-W driveway light bu 9 y9q hzk+xl8c5 kufo)o.b;sllb is on 10 hours per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricfzl8u+lkyx hs)c9 .o;q9b5k oity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus mon2mykk ses+r h )jtl.--itor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to run the com yr -es2s+kkh-j.mlt) puter annually?

  The monthly (30 days) electric bill included dl uz f mnxb1z4x:ojt8yl4n// f2a, *qthe cost of running a central air-condlndo 4a/j 2xlzzfmfn/x4y tqb,u 18:* itioning 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 costs 8.0 cents per kWh?

  The heating element in an electric drier operates on 240 V and /:/.v)l *w s3ixyyv5yp o fkeegenerates 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 unchanged. In reality, the resistivity of the wire ey)os:3vy5wx/ elp *i.yvfk/will depend on its temperature.) What effect will the repair have on the power dissipated in the heating element?

  14 A of current flows lyq hr/a i5;1hthrough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs9qf8r2pb 9v4ti-jj pc $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% efficienc3-3nej u*m mhv kw:d25/ bubiwy. How much current does it draw fk3j:hm/u2e5u wbd- 3im*v wbn rom a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 1ww ll:r1n6tws 7gal24ih--pi-aszn*20-V ac power source. What rms current flows throug7tz*wa1 w pnsl6ria- igs4 w2l-:lhn -h this device?

  A 500-W device is connectedyt;xr64gl kj2:- bafnxjyz9 ogn2 a::0qtu:z to a 120-V ac power source. What peak current flowsnx :xb0z j4a9tuzt 6;r:l2a:ngfqk :g-j2yoy through this device?

  A 500-W device is connected to a 120-V afwbj9fs*/ y d(c power source. What is the peak voltage a9/*f j (wsdfybcross this device?

  The diameter of a copper wire is 0.081 inch. The maximum safe cu;kxgrg5ov:;7oi eh/ -3 rcws arrent 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 nur;o/ e:g r3is7;k oa5hxcvgw-mber of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)