A device that produces electricity by transforming chemical energy14zzr/hne 4vezn *a:q into electrical energy is callr*q4zezv41aen:h/n zed a

  A car battery

  The total amount of charge that passes through x,s 6 c-snooo3a wire's full cross section at any poiocx,o-6s3sn o nt per unit of time is referred to as

  The direction of convention current is taken to be the dfkie;w+0u*fo3txi7 ;8vw db jd1 3jelxv z -(airection that

  A coulomb per secondt3 4lkxyv,h/k, nof1w is the same as

  Car batteries are rated in "amp-hours. /,83 bttw ljbniqf/c 2r.grv:" This is a measure of their

  The resistance of a wire ish.k.zbw m: ni. defined as

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

  The resistance of a wirezfm+s 4fr 24hjxn *c3az :6ugn is

  The resistivity of a wire depends on x:43a) m)) z*b: w xxkj 4hfdpwn:*owr:mkwgy

  Which conducting material has the lowest resistivit) qr;y(q-vetq y value?

  Consider two copper wires. (z2t2ql57a2ey6eygy:y ud9pqb0x no One has twice the length of the other. How do the res l (e t:qq25bdu0xgy2yoay2yz6n9 7epistivities of these two wires compare?

  Consider two copper wires. One has twicen5sda.z)e-pzq2j z3p rwav- 0 the length of the other. How do the resz0d- jnpz.5v sw2 aza)r3 -qepistances of these two wires compare?

  Consider two copper wires. One has twice the cross-sectional area of the othex * .piqb/t2jl3kw2br z z6go5r. How do the resistances of these two wires comx3br.* ojw lipzt 2qk2g/b56zpare?

  Consider two copper wires. One has twice the length a q+::3 y/pemruu:vqrl nd twice the cross-sectional area of the other. How do the resistances of p3/l:yvre+m:u:urqq these two wires compare?

  The length of a wire is doubled and the radius is doubled. By what falgphx eg :-5 8s8quu 9ud/sz5gctor does the g8q zu:5suud-pgg8/lhx95 seresistance change?

  How much more resistav po6s 2w qn9f-oj1f9bnce does a 1.0 cm diameter rod have compared to a 2.0 cm diameter rod of the same length and made of the samfqsjp-noo6w9 91 b fv2e material?

  The resistivity of most commotc88 ik 8lxng) 9(gsbqn metals

  Negative temperature coefficifcja. ,(7ixnd ents of resistivity

  What is 1 W equivalenbfcn.8 fi z0 :xzm5*tqt to?

  A kilowatt-hour is equivalent jmf jb ,+fmcu43d4)ns 6whb)ato

  If the resistance in a constant voltag,2xm.bixie z7j88l vrd+a b)ve circuit is doubled, the power dissipated by that i87)ri l zvxxjmed .+ vb8b2,acircuit will

  If the voltage across a circuit of constant resistfpxydjx;ph7 3ox 6h 29ance is doubled, the power dissipated by that o 2pjhxhx3yx6p; 79dfcircuit will

  If the resistance in a circuit with constant current flowing is ( mpxyd0za-jn a ky8r(7i) .txdoubled, the power dissipated by that ct0. jdpak(8xa)iyx-yz 7r n m(ircuit will

  If the current flowing through a circuit of consta 0 sy)6k.f9ewxsqdh )gnt resistance is doubled, the power dissipated by )s h 9xqwksyd0.6) fegthat circuit will

  During a power demand, the voltage output isnc1m/ kl10lsmc;w28de bei o nn,7 d*j reduced by 5.0%. By what percentage is the l olecs0dd;mn m7 1 n k/w,ecb8ij2*n1power on a resistor affected?

  A current that is sinuh s7+s un lhmokr6l )e7c2i*8fsoidal with respect to time is referred to as

  Consider two copper wires each carrying a xebrcz;(db6b mzta i u/ez0+3k9a;j 3current of 3.0 A. One wire has twice the diameter of the other. The ratio of the drift velocity in the smaller diameter wire to that in th3(aadzbx9tzz0mre;+ c jki/3u e6 bb; e larger diameter wire is

  Materials in which the resistivity ms:5anhlm)u 5 g3 el1nbecomes essentially zero at very low temperatursl g )ne1l 35hau:nmm5es are referred to as

  What current is flowing if 0.67 C of charge pass ah. ok) yx7ij+cp.enh1 point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus mvx6knc 0 hr7gf*-i a(/py6vf in 2.0 min. What is /r(f0-n*6i vk v pmxfc7g6ahy the average current?

  How much charge must pass by a point in 10 s for the currq u x8/ui73hgkent 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 flow jue.5+4obn:xa dvzy zj01uuy o,40eling 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 current, has been leux2s ss 5mc9zcjoi ;kh) e*1f)ft on for 10 min. What is the net number of electrons that have passed through t9xs)kuszf eo* i1mj5) 2cchs;he coffee maker?

  In an electroplating process, it is desired to deposit 40 m e) ,iyrf7aja:g of silver on a metal parajiar:,7 fy )et 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 is 108.)

  What potential difference is required to cause 4.00 A to flow throuz0pn1 r3gz,dlgh a resistance of 330 W,lz nrz3g10 pd?

  What is the voltage ac.)gfkos;r.h2vh kv r+ross 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 v1nc:v .wd 8vl9b4 ujmwill flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is i ujbqlg +nr*k*/z.b 8yts resistancer*z+qb .u yb8l*jk /gn?

  A 12-V battery is connected to a 100-W resistor. How many electrons flow througq:v+ m-syjf km((0n mdhvm(-mm( sdkq0:j + fny the wire in
1.0 min?

  What is the resistance of 1.0 m copper wire of diam2jkz3 r;w (xquwb;g (peter 0.40 inch? (The resistivity of copper is q(w 2(gx;;bj3pz kwru$1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameter and 45ga) qpqo5v- ylkm, 2w9 m long, if the re,qmw -2lqkg pv95yao)sistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wiyo.aeu +8wd*h vht bpj*(/tdkzk4b ;8re (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 na3e o635 yk o74f5qzsel5yvb (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. +nerofh8**yydy9cl-nj .8 ltp2 ta5i What is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge (the radius is 0.321 mm* 8r-l vdlqkz)) nichrome wire if it is connected to a 12.0-V battery. (The resistivity of nichrome ivzql*d ) lkr8-s $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and of rectangular cross-section, 1.,vs( kiyujv1 .0 cm x 2.0 cm. What is the voltage drop along its length us,ivv1yk .(j 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 of 0.50 mm and a resi:cc w)nqi8vv 1stivity 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 (r d6vd -xn5kdxez.l.h-esistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has 3kp h2zg0zjihy nv 7)9a resistance 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 r gmq) .1u*ev vr8ckqd5esistivity 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 determineyy vk i815. kx0n )jn 6ceux1uqey*xf/ the melting point of indium. The resistance of the platinum wkkxyx5fq8 u xeyin0y.1j*ve ) cn6 /u1ire 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 thrn 1k3o9q;uxnq1 w6c pjough an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rarlomf.o4nw :a z(l :0nted at 1200 W. What current will it draw?

  A 150-W light bulb running on 1s f,0 *xipzme110 V draws how much current?

  What is the nominal resistance(h 1eip 1e2ain of a 100-W light bulb designed to be used in a 120-V circuit?2i(e1pina e h1

  A toaster is rated 800 W at 120 V. What is the resistance ofuxq-.3yri6py0t 7 nub its heating element-u 76qy.yb upixt0r n3?

  A 200-W resistor is rlh v* moif34q1)fjxy4gh8;y lated at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ratezyw3mc3 vau .8d at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what cu5z8p4o+p(l4 r t xwos j6nol2j;gqh-t rrent does it draw?

  A lamp uses a 150-W bulb. If it vltwg+(.u, 7h n8eml*+;bs vna q4opy is used at 120 V, what is its resistance?

  A 25-W soldering iron runs onep y51l u1w2rmyn7+z y 110 V. What is its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hr7.1:gj xio2vb.r;kc7 ch hndours, if energy c;hin.:d orgh17.rbx cj2v7 kc osts $0.08/kWh?

  How much energy does a 100-W light b:pd7m rf vgaq a-156bmulb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much h+*w- 0zom gwar1nwzh,eat energy is produced? +g*h-zwrw1 onwmaz ,0

  A battery is rated at 12 V and 160 A-h. How much energy does the batter*l+/e r)c cn9yke d)nfy store? fkln *reyne 9d))c+c/

  How much energy does a ji lho2h :x7,43bla9xe ax: ow25-W soldering iron use in 8.0 hours?

  A 100-W driveway light p71g7)a azry 4bqyu-sbulb is on 10 hours per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operateq4as1yygp az7-ur )b7 the bulb.

  A 400-W computer (computer jh q(1vzzg w d.poqg-s3r:l (-ulj1 jzo. b*c9plus monitor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does-oczz hw q.zrjsg(1dbjjou9 ( :1 lv.l3g* -qp it cost to run the computer annually?

  The monthly (30 days) electric bill included the cost of runc5 2s+tw-/o6, +ieoidhjx3 iio :imoining 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 the cost of the monthly electric bill ifxj t+w2-6co5o,dii me +iios h :oi/i3 electricity costs 8.0 cents per kWh?

  The heating element in an electric drier operat6y 0lj47trt/ rwdxu h0es 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 temperature is unchanged. In reality, the resistivity of the wire will depend on its temperature.) What effect will the repair hax4lwr60y7r h tj /0dutve on the power dissipated in the heating element?

  14 A of current flowp y(t1 vh,hs3cs through $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costsap+qkgdl6y 1 2g3ts r5 $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 tk *9 16xbqlnd ynt;gj6p j6jip*zk0,s he rate of 2.0 hp has 60% efficiency. How much current does i 6j 6t,x6jd* * 0nsnpkz;ly9jqbkgip1t draw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rms currentl n3lehs81 ev8r 5r,rl flows through t3h5 reln relsv l8r8,1his device?

  A 500-W device is codu7w4a 2 sqefg3-mk e:nnected to a 120-V ac power source. What peak current flows through k7:w-f a4qg udsm3ee2this device?

  A 500-W device is connected to a 120-V ac power source. W37y)d1z.qg( ucu nzq ehat is the peak voltage acro7 n3zzuq )e.udgq1(ycss this device?

  The diameter of a copper wire is 0.081 qc kjxt:ahv4):e20o1id(ts h inch. The maximum safe current it can carry (in order to prevent fire danger in building construction) is 20 A. dajq14:tx i2sht0kcoh( )e:v At this current, what is the drift velocity of the electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)