A device that produces electricity by transforming. -knj/- bkue5+g xdwv chemical energy into electrica5njdv/k+ ku -.gxewb -l energy is called a

  A car battery

  The total amount of charge that passex r)/ wqa:fr,ys through a wire's full cross section at any point per uw yqr)a,xr/f: nit of time is referred to as

  The direction of convention curpkse d7)khh0n m5*p4 brent is taken to be the direction that

  A coulomb per second is the same .hp+v wo;lka0f(rb b yj64i 3bas

  Car batteries are rated in "amp-hours." This is a measure o snqa ov0lpyn k-f.l v:).go-ph/(l3 wf their

  The resistance of a wir3d - 8)if umt0cke0iuie is defined as

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

  The resistance of a wire 3.w arir.o4bwf6fp 7 ois

  The resistivity of a w,u gkyu1o5b*aire depends on

  Which conducting material has the loweb zd+ii4m;(jh/3zqm bst resistivity value?

  Consider two copper wires. One has twice the length of the other. How do tifgpwb z9ee/ rf03*v9 he resistivities of thevp9 fez*f0 i wg9rb3/ese two wires compare?

  Consider two copper wires. One has twice the lenmy;9h o . q/-iwgt*oofgth of the other. How do the resistances of these two wires compare?;g9tmo.o/ w* yhfiq-o

  Consider two copper wires. One has twice thet8bd.8fwq3o;v t gz8r9y5i(,xj 4nufouk/ uq cross-sectional area of the other. doqx9gbyfitnf ,88jvt .;zquku(o w/8 u r54 3How do the resistances of these two wires compare?

  Consider two copper wires. One has twice the length and twice g3m;zjq v5j 5pthe cross-sectional;3 j5pzvj5gq m area of the other. How do the resistances of these two wires compare?

  The length of a wire is doubled and the radius is w6t st)of-t9 gdoubled. By what factor does the resistance ch)96 -fwotg tstange?

  How much more resistance does a 1.0 cm diameter r k/49aawb kjac ,jh01sod have compared to a 2.0 cm diameter rod of the same length and madek sw4aak09 ajj,1b/ hc of the same material?

  The resistivity of moi 0t2m5d1f*ka qpok d px9k2,bst common metals

  Negative temperature coeff(gg:4f 5ms c,cah(r tcicients of resistivity

  What is 1 W equivalent0ls 3vy+vhjo, to?

  A kilowatt-hour is equivalech6,)oeg6 dsm nt to

  If the resistance in a constant voltage cir.6epm+ 5y htx- pglwk*bzi(v v8y+k e9cuit is doubled, the power dissipated by that8y wpxhgem p+e+v. 6iyk *k(tvz5-9 lb circuit will

  If the voltage across a circuit of constant resistanftkp)d:vr+vyl v* i9xy7(7 b nce is doubled, the power dissipated7dk) vr*+x(v:vby y7p 9nflti by that circuit will

  If the resistance in a circuit wi-6v2ce 7z1yeml m lu0yth constant current flowing is doubled, the power dis 6 llm0ycye2u-71zevm sipated by that circuit will

  If the current flowing through a circuit of constanoa*r 0z ytsx,k(7,fk8sy7 mb, lgcwa )t resistance is doubled, the power dissipat7,clz7o kw()8 f*axt b,m gr0yska sy,ed by that circuit will

  During a power demand, the voltage output is nhnddjdz*c t0s.),r)e6h) 7rx uhl9 preduced by 5.0%. By what percentage is*lp)r6dr nc)jedhu z h,97)0h.ndx t s the power on a resistor affected?

  A current that is sinusoidal with respect to time is referred to oh/p4b g1rn 1ias

  Consider two copper wires each carrying aid)w t dj8:-le meiw)1 current of 3.0 A. One wire has twice the diameter of the other. The ratioee imwlw:j-)1dd )ti8 of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomes ;u +jbqy(t2ch eg 4bnrvf/0 j ,fdh(*qessentially zero at very low temperatures are referred to as; ( b r2jgfj/teqh hb0 ndv+,cf(yu4q*

  What current is flowing /lf9q 9.jcp(zaf :bjmif 0.67 C of charge pass a point in 0.30 s?

  A charge of 12 C pasn05)x n 6yeyh*6evu0 byww0 nqses through an electroplating apparatus in 2.0 min. What is thw0hnyvn6u *x0eeq)w6 y05y n be average current?

  How much charge must pgpbokp tx6 +4*ass 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 imrtxholgt89* /wz3j 0 f $4.0 \times 10^{16} \; electrons$ 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 current, has- jv xvi7tr9-b been left on for 10 min. What is the net number of electrons that have pasivr 9-xvtjb-7sed through the coffee maker?

  In an electroplating process, it is desired t9woj -n;b jzt5o 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 sion;bz t -jw59jngly charged, and the atomic weight of silver is 108.)

  What potential difference is required to causea1ec 0 ssdc./-r n z,szfl;o6i 4.00 A to flow through a resistance of 330ln /0eossfr;iz6 1sz, cdc .a- W?

  What is the voltage agiw8mh: mi6s 9 . rh16dirsbm gcc:p4jh2n5y- cross a 5.0-W resistor if the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What current will :,4 rehubqp 6kflow?

  A light bulb operating at 110 V draws 1.40 A of current. W9.. 0c smxbpadhat is its resistancexb0m.a9. p sdc?

  A 12-V battery is connected to)(mbl3/xmy s g a 100-W resistor. How many electrons flow through tg3)b smlmy/(xhe wire in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0.40n(, ns6ozir+gi;p. q*ktok( z inch? (The resistivity of coppeonsn iig(.o ;zkz+ , rp6*(kqtr is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameter and 45 p4mdc/ e0n6 eum long, if the resistivity is md n e04euc/p6$1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resistiviuiq;)con: chn1vxg:,8ar ,kca/0no zty $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wirel- g/)c l(ibbb z)dzggq,u+p - (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 0.040 ohms. What is its resistivity3zpjb*+s.6ll g kwvovrd842x?

  Calculate the current through a 10.0-m long 22 gau2 tp0 vb7,s33 pgl+m c/vcmemqge (the radius is 0.321 mm) nichro,tvlcs3m72qmg pb mc p0 e+v3/me wire 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 rectangular cross-section, 1.0 cm(+ j4rpg+e q.n kte9cu x 2.0 cm. What is th+9ktuqp g.een+c r(4 je voltage 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 gyva)fimx6mpf0:ro *2, iun6 ;y+we*qa8eqd 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 copper wud .w4f)q;jw 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 resista3e4nmos8y p* nnce 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 platinum nl,2b g/ek b)wr/2lpjis $3.9 \times 10^{-3} /^{\circ}C$. 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 point5wmpr+hkp14rv jd53fw3 qs 8n of indium. The resistance of the platin wdp4jsf 5+3wqmrnkvh15 8p3 rum 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 throudp)a j4+ a3 j;cs 2h:su.xonvkgh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What.sje( wcs47ccgcw 8p5tz, uu5 current will it draw?

  A 150-W light bulb runnins42 9bxxiblfh.cbt 8ey0e r10*jqk v9g on 110 V draws how much current?

  What is the nominal resistance of a 100-W light bulb des5jiqa .en(0cw igned to be used in a 120-V ca5(jeqn0w .ciircuit?

  A toaster is rated 800 W at 120 j: 20yy lxu)i/cu:aho e j1/iuV. What is the resistance of its heating elementyu:): jhy2alju0io1 e/ ixuc/ ?

  A 200-W resistor is ratedhlap.en slb5 9wi6:myf 1a+ m- at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rate+cw tpz(78ri xn;f c0ml: hrw-d 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 doeq;0daydr0(l; c nw- sis it draw?

  A lamp uses a 150-W bulb. If it is used ateg+m,r yu w) xe g/wm4pi-/*wx 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. W,; cy61.l: cy*kuii6 cacym cghat is its resistance?

  How much does it cost to operate khknvgkmt(*0 (h5p8 (x v8f, as3qvr, xdouh5a 25-W soldering iron for 8.0 hours, if energy cosvak(tf,3v g80,o s(5vxhm 8kk( rq* hh npxud5ts $0.08/kWh?

  How much energy does a 100-W light bulb u eg2x)d :k+1xxy bcx3lse in 8.0 hours?

  A 1500-W heater is connected to a 120-Vzsgy3x5::fg n line for 2.0 hours. How much heat energy ig 3ng z:fx:sy5s produced?

  A battery is rated at 12 V and 160 A-h. How much energy does a kc)2 6f (rrvwxgc 65zqx:m4vx,3ab tthe battery store?w , axxgr(c4vxc:vr6m fzb5) 2k3t6qa

  How much energy does icj*v7q(r 1pp pq7 q.ca 25-W soldering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming the d wot--m/5o mwpower company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost m m w/-tw-oo5dto operate the bulb.

  A 400-W computer (computer plus monitor) sv8 *a4zr5b mnis turned on 8.0 hours per day. If electricity costs a4m *bsvn85rz 10 cents per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electric bill included the cost of running a central ,ft *w*q /fwrkair-conditioning unit for 2.0 hr/day at 5000 W, and a series connection of tentqw k/f *,*wrf 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 generate(o7 z bq8e 5bgia:ua3ms heat at the rate of 2.1 kW. bg q 8i:e35a(o7zmuba 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 will depend on its temperature.) What effect will the repair have on the power dissipated in the heating element?

  14 A of current flows thro9xd vap *ork(i)- lun-1kyaw 9ugh $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs n *zxs6bbtfu:m r2(r1$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 hptsp(skir h,+) has 60% efficiency. How much current does it draw from tk+,s)rpi (hs a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power sourcpuwg +)e1qq,v e. What rms current flows through this deviugpqvew) q,+ 1ce?

  A 500-W device is connec)i (pxmzk/b dvl:i uqmkgh6tsd:9 *(3 ted to a 120-V ac power source. What peak current flows through this devic3gtvi q( bd:z(p) m:il9/ksdh 6 m*kuxe?

  A 500-W device is connected t nnfjjba ql))0- k+l b8:4fdszo a 120-V ac power source. What is the peak voltage across this)a8jqz+0 fd bll)4k-:jfnb ns device?

  The diameter of a copper wire is 0.081 inch. The maximum safe current it can cin/s*,fv*x-u4cw/tf fc6eg yarry (in order to prevent fire danger in building construction) is 20 A. At this current, what is the drift velocity of the electronf*f, iwcnsu/y4f6 /x-tegcv *s? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)