A device that produces electricity by transforming chemical e: uq vmhg cw, j(cc9xb+w.1r+y7q, lcrnergy into electrical energy is :lwc(7qc1+humj +wqry ,9,g.bcr xvccalled a

  A car battery

  The total amount of charge thf wty29e qad302v w5zcat passes through a wire's full cross section at any point per unit of timdf 05a 9z3w2wtc2eyv qe is referred to as

  The direction of convention current is takeud:okd7g 0c+tn to be the direction that

  A coulomb per second is the (8deh 7xmkbbm)i4cv 1same as

  Car batteries are rated in "amp-hours." This is a measure of theit:q b8*wlkd-g,ab -htr

  The resistance of a wirkn g8l7vd6 s *d)+n a0tkrqc-ke is defined as

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

  The resistance of a wph wm()v awa8/ire is

  The resistivity of a+3de dax*z0l s wire depends on

  Which conducting material has tl 7f d4-7obmgx.dya 3lhe lowest resistivity value?

  Consider two copper wires. One has twice the length of the other. i.b (dqn 9sy-f0l h;:)cc czytc+(kouHow do the resistivities of )ylbtqf i c(cdc;u 0 . 9(cn+zhkoy-:sthese two wires compare?

  Consider two copper wires. One has twice the length of the other. H iry-awv8 09qaow do the resistances of these two wires compa9a v raw0y-iq8re?

  Consider two copper wires. One has twice4re4 kkcluk* - the cross-sectional area of the other. How do the res4*ukr l kek4c-istances of these two wires compare?

  Consider two copper wires. One has twice the length and twice the cross-sectiv x+knp.xi+8aq.-oz yonal area of the other. How do the resistances of t+.8vkn + -z.oiqax xpyhese two wires compare?

  The length of a wire is doubled w4z*fmm*d+ 8kn q)hcaand the radius is doubled. By what factor does the re8fm*m) azw+dn q4ck h*sistance change?

  How much more resistance does a 1.0 cm diameter rod have compared to a 2.0 cmhygim,dxxct2n. , /h) diameter rod of the / nd ht,cmix h)y.x2,gsame length and made of the same material?

  The resistivity of most -lt/xd85 dm/u oqw-3ipjofn x5a 3td2 common metals

  Negative temperature coefficientz:1unjfu lm75 km;fd+ s of resistivity

  What is 1 W equivale pf25es.j6omvzco) z (nt to?

  A kilowatt-hour is equivalent tqaaytcq5jh nqt-yx 49496 p3oo

  If the resistance in a constant voltage a ) +/m:pkts9nq7 8 yyt6d5e iazp7uiqcircuit is doubled, the power dissipated by that circm7s p k5t8eiq/9):qizy6a7t +u pan dyuit will

  If the voltage across a circuit of constant resikn (lsxbmx me/)l75c3*t fjv0 stance is doubled, the power dissipated bys) b/vxt kx53*lemc f0lnjm(7 that circuit will

  If the resistance in a circtje/ ae1l5+fv( 8wgss uit with constant current flowing is doubled, the power dissipated by that circuit wwvssea+1j t85/f( lgeill

  If the current flowing through a circuit of constant res ba;h.gww5 zy8istance is doubled, the power dissipated by thatbh; . 5zwg8ayw circuit will

  During a power demand, the voltagpf za(91 : mowoml:msdq1 -6kve output is reduced by 5.0%. By what percentage ifmzl q(v:1wdo:9mko 16s- p mas the power on a resistor affected?

  A current that is sinusoi7kydf) 23ch 28t4ff z ;qkskuldal with respect to time is referred to as

  Consider two copper wires each carrying a current of 3.0 A. One wire has twicervzr9efmo3hn+/b4 s1 the diameter of the other. 9r4s3hrnz fob/e+m v1 The ratio of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity id1n5grvhv-r6 0ub ,p becomes essentially zero at very low temperatures a5nihrvb1,vru06gpd -re referred to as

  What current is flowing if 0.67 C of charge pass a point( ng-xl.e +zu7zh.iob75f p vk in 0.30 s?

  A charge of 12 C passes through an electroplating apparatg3l+xneuz w8 2us in 2.0 min. What is the averanu 3z g82x+elwge current?

  How much charge must f.6cg zn8f p+e6 f1dukpass by a point 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 5r2txv+ w0otxt zm2 ;*gpg- pxz6 *srt6 n1yieif $4.0 \times 10^{16} \; electrons$ 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 Asig5zbgnd -.t* ,o:ql of current, has been left on for 10 min. What is the net number of electrons that have passed through thebinq,zs5g do- .l t:g* coffee maker?

  In an electroplating process, it is d3 yu8;)oy dvmp qg/tp2esired 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 silver? (The silver ions are singly charged, and the aty 3ypdq/; 2uvom8tg) pomic weight of silver is 108.)

  What potential difference is required to cause 4.00 A to flow through z:jix- 1wcmwmz,qp mn w 8g(55a resistance ofm8 z-n,:5g5 wmxz(j1ip ww qcm 330 W?

  What is the voltage across a 5.01tx dtxb* 4zt2-W resistor if the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What current will flos oj1j5 ,j0ukqw?

  A light bulb operating at 110 V draws 1 1dmw,3n6 u:jfakl7f6lyxoa/.40 A of current. What is its resistancey x66/fw7n ajfl3lk du1a:o m,?

  A 12-V battery is connected to a 100-oeoq9b8 a mc7/*jp9 pxW resistor. How many electrons flow through thcopp xmoab *jq9e/798 e wire in
1.0 min?

  What is the resistance of 1w88 tguo6/ chw7pwq *5y(zmik.0 m copper wire of diameter 0.40 inch? (The resistivity of coppert hgk 8wm u5p8oi w/7z*w6(yqc is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance 7 -+jpjn-m2rzfss t +kof a circular rod 1.0 cm in diameter and 45 m long, if the resistivity ip mjt+r2- +nsfzs7j- ks $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (res0kmu j:d+g 4xmewvj0fz.1e* k istivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (re.f6 ;a8 o-fn55.u hz5 viwmgu, hqpbhcsistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 reiaf7: skdb: q:gj3 c vt jzem6,dcdib1e(b4*9sistivity?

  Calculate the current through a 10.0-m long 22 gauge (the raada9 ks (z4i a/+8nlcvdius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. d +ak /azc(8n4l isav9(The resistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and of rectaw e( f c1m2138,fo5itcd zgfypngular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carowtc(fp8 e5, m3ifzy2c11fd gries 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 c+fs u py8wao;7 kga(ods8059ihi y9cradius 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 copper wire (resistivity :su.b quz*e2l om 3qd;$1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistance7ugfd1ejv+;ft nss6 8 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 platinz9z2(g ek 5,qbutgla3 um 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 thervtn1mvbq679;-yk yv /e grc* melting point of indium. The resistance of the platinum wire iy r76qcg-m1*y; tev rbn k9v/vs $2.000 \; \Omega$ 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 thr- 5qbvx56gz3c; hhum q59ntnsough an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 e/770tkb t1xgy6z ilkW. What current will it draw?

  A 150-W light bulb running on 110 V draws how much currentend v8sw3 b 14gw8:9xdhads6p ?

  What is the nominal resistance of+f 5ig72 f1y(gpva 5xmddf1sy a 100-W light bulb designed to be used in a 120-Vsgym2fp1 (gf57fdax5 d yv+ 1i circuit?

  A toaster is rated 800 W at 120 V4xzm /i.,lksr5ks/ vi . What is the resistance of its heating elementks5 zm4i/,.ikrlvs x/?

  A 200-W resistor is rated )vu1 x; klx9* *hdfez genho60at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ra2xcxt6t;h. ha7r)axg 8br xh lo +b4y5ted at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb.y8(mk g4c4wm0:j bjlv1iu ,afh oy33s If it is used at 120 V, what current does it draw?

  A lamp uses a 150-W bu0ab-pb8(s c :fv6 rwnulb. If it is used at 120 V, what is its resistance?

  A 25-W soldering iron ru0-+5tnxvznoeho,s *y ns on 110 V. What is its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours, if eo36q8,c+isgx 8sp, d 3j pudbenergy cost3jdds 6psb,px8gu+ iqo8 3ce,s $0.08/kWh?

  How much energy does a 100-W liee3hpv)y,f t0l* oq8 fght bulb use in 8.0 hours?

  A 1500-W heater is connecjq-32.lz lnf z c7p-icted to a 120-V line for 2.0 hours. How much heat energ .jz3pl c zq27l-finc-y is produced?

  A battery is rated at 12 V and 160 A-h. How much energy do)*nt sj:etoa 0es the battery store?nte: ja)0sto*

  How much energy does a 25-Wmfgsq f 9c+rnyuq5 /:5n/ i/cv soldering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per dudc- htoz0 o;h*m+h6 xay. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate do*-c6+;hm0ozthu h xthe annual cost to operate the bulb.

  A 400-W computer (computer plus pp8/c3sp mg* smonitor) is turned on 8.0 hours per day. If electricity costs 10 cecpp8p s/s*mg3 nts per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electricvs 7u7-+iyc7xo us, ia bill included the 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 did these items contribute to t i77oyuxcs u-,+ai7svhe cost of the monthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element in an 0iygv1,( hfbl electric drier operates 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 temper hv g,l0y(bif1ature 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 5c,5eg72xx4 9kb topiqke +twrough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costjsb9/ x-tcjp*5v +dyp s $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 2.0t:4f)m* 8ia0 +k u puwuachk2 mz/g 9ysehsu(+ hp has 60% efficiency. How much current does it draw from a kzuc+ ms g k0 24ts* :ha9ifm8eh/w (pyu+au)u120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connect(uad2fqo4u r,n:uw40pl k ;vced to a 120-V ac power source. What rms current flows through this dev;urn: k4,0v waq2p(c4o d uuflice?

  A 500-W device is connected to a 120-V ac power source. W6 r4 tzry2p;bm yy r9l*)6gq j00cpdlbhat peak current flows through thisd9*gl6)by0 yj2b6 r;rq0r mpl4tzcpy device?

  A 500-W device is connected to a 120-V ac power source. Whauj1*sy juaerdh3h3 51t is the peak voltage across this device?h*jr11as uje3 3u5dyh

  The diameter of a copper wire is 0.081 inch. The maximum safe current it can ns)bg7a 6*k5w p+ppmp 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 nupk7abm5ng+6)pwp*p s mber of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)