A device that produces electricity by transforming yp6kc n8lg; p7chemical energy into electrical energy is ca ;8klcy7npp 6glled a

  A car battery

  The total amount of charge that pavs0q3tax jq d ;3:iibrn zl1yfg9q)( of;,( tesses through a wire's full cross section at any pof9(r3 ljbq 0 ;3x:o(s vqitqi fty1edn g),;azint per unit of time is referred to as

  The direction of convention wb-aezy-ii6 * current is taken to be the direction that

  A coulomb per second is bc 01 r-bvb) qio8ol.tthe same as

  Car batteries are rated in "amp-hours." This isf:y-r2aa xnd,g: isr2 a measure of their

  The resistance of a wire is d mo.v bxq:/0qta4nv y6efined as

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

  The resistance of a j1:up gkj13oxq y0jv/wire is

  The resistivity of a wig:h vr+t,(1kfrh qjl8v1b;ma re depends on

  Which conducting material has the lowest resistivf/ rvu bjl(+v.ity value?

  Consider two copper wires. One has twice the length of the otx j ( /5u0bimvwkmf29sher. How do the resistivities of these two wiremiwb5xsmj2(u 0k9 v/fs compare?

  Consider two copper wires. One has twi 7*gyyhj1b(u:y0e sc -d;rg vhce the length of the other. How do the resista:b g*s-duygyh ;j 0y( v17crhences of these two wires compare?

  Consider two copper wire+mj t8 jb+k.gps. One has twice the cross-sectional area of the other. How do the resistances of these 8j+g+tk mp j.btwo wires compare?

  Consider two copper wires. One has twice the le ucj2 w32uw+w mpq xei07hs,a.ngth and twice the cross-sectional area of the other. How do the resistances of these two wires co0p3u a2 q7cw i.mxu,wj swe+2hmpare?

  The length of a wire is doubled and the radius is doubled. By what factor does rn4n3pd4+/e (t w nad,*kp9yvk e(v +wmm/qs uthe resistan r9qp (n+y3wwdkd,4e k//metvu v+map(nns4 *ce change?

  How much more resistance hf br-j;ckz(a )yg9 e8 rzen;0tcdo6 e/sn0;ddoes a 1.0 cm diameter rod have compared to a 2.0 cm diameter rod of the same lenen;/zg hazenks ;j t(cc- 9efdry8d0r0;6b o) gth and made of the same material?

  The resistivity of most common md5a d1khoz02i etals

  Negative temperature coefficients o8 e1j 1em,nbttmh*o2 g,,pj. qd4upcj f resistivity

  What is 1 W equivalent tuj *qjn,+ jze( hn9ea;o?

  A kilowatt-hour is equivalen2t,8cb) a ocqvd) 7zfat to

  If the resistance in a c3p1il v2l; pu2wes0 hxonstant voltage circuit is doubled, the power dissipated by that c1s2 xu pl3 ;0epwlihv2ircuit will

  If the voltage across a circuit of constant resista2+a; f/+kpih;m kvce f8r*wka nce is doubled, the power dissipated by t8 fc+hr;em*i p ;wv/kf a+kka2hat circuit will

  If the resistance in a circui7szg 7dzw*vhmg ft9hbf i r-b.3xy*0 4t with constant current flowing is doubled, the power dissipated v0-*r hff9bbxshg 3 yztm. 7ig*zw7d4by that circuit will

  If the current flowing through a circuit of constant resrcg9)peh6y z/ istance is doubled, the powr)e6/hpcy 9 gzer dissipated by that circuit will

  During a power demand, the voltage outpux9qe-nxb g*1+0k94kzp l z enit is reduced by 5.0%. By what percentage is the power on a resistor affecte1pbkzk qnx e*4+0lin-exg9 z9d?

  A current that is sinusoidal with respect to time iscuf0 4o9tmf,8fvlxxtf nba/ l +/ g1/m referred to as

  Consider two copper wires each carrying a curren 0fukmgcz+f46t of 3.0 A. One wire has twice the diameter of the other. The ratio of the drift velocity in the su+f gm 60ckzf4maller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomes essentially zero at very q0ot-6:qxs a(il fd(xlow temperatures are referr-oqaxq (0 (:i fs6xtlded to as

  What current is flowing ifhh 9k a4 vdb :eh,ov7cgq*u0/c 0.67 C of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electris(a6 b dpd)5 7we.xqlg,gkp1oplating apparatus in 2.0 min. What is the ave .w,pi (d7)qp 6eks1ggb xdl5arage current?

  How much charge must pass by a point in 10 s for crapj,,ij 5 c6the 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 if otvm+kz-x 8ex. +mc;v$4.0 \times 10^{16} \; electrons$ 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 left on , 2osouie.8v z i(tns6for 10 min. What is the net number of electrons that have passed through thes nets ,(v2.zio6i8ou coffee maker?

  In an electroplating process,7zitlnz ;o 5+jq+:9w eleq:tm it is desired 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 deposittmz+ l+ e;z7: jotn e9q:lq5wi this much silver? (The silver ions are singly charged, and the atomic weight of silver is 108.)

  What potential difference i.w) ,nz usu+k3*iej8 mtfk n:7ytd1yds required to cause 4.00 A to flow through a resistance of 330 ef)d,1sn7m 3uj ktw y+nz:. td*k ui8yW?

  What is the voltage across a 5.0-W resistor if the c0aydl 6welsb/p 55;isurrent through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What current will flow3/pg 3vrld o:va)r laqfl1gtky-/, j4?

  A light bulb operating at 110 V draws 1.40 A of current. What9n.fp mw4+ b wq0 v)qscvs()et is its resistance e v+nm w)(wb.ssp)9vfcqq t04?

  A 12-V battery is connected to a 100-W res5w* mu wr3(/nyae8zzj4,ey szistor. How many electrons flow through the wire neuyam 4/w5,swjzzr y*ze8 3(in
1.0 min?

  What is the resistance of 1.0 m coppe xytzswp gha,, v p;t :m(86o9unzt,c4r wire of diameter 0.40 inch? (The resistivity of p: vt4z 6y8sw , gz9t(onxa pmhuc,t;,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, if thy,840u0 hrm;zi4a u lrnldwb 5e resistivity isi u4rlrm54;d0yhwn0,8 zablu $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resgli /s)*dz p5fe;r)mk8 scq4eistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper x7. jzcb1,df,k*ql iawire (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 0.04izp*f j +u1xzf05 ;tux0 ohms. What is its resistivity?

  Calculate the current through a 10.0-gjpdhm9t/55 )yot 9tkm long 22 gauge (the radius is 0.321 mm) nichrome wire if mhp5o/)tj9kgty95t d 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 cr9 w:n -q+:xqmwqmd si1.+j jcm x 2.0 cm. What is the voltage drop along its length whe +r qsjxqw:+mi-9 c d1nm:qwj.n 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 resistic)mr n)n v(w)rvity 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 (v;v j;p8xot sm89fp/bresistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor ha ;vo0tpc/ c5ccs a 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 resistivit:q2; xv 30u:pmtca ,mopa mv04pu u8koy 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 melting point of ind cktvpx6u5mf* *k 3zr,ium. The resistance of the platinum wire ix5 fk mz*6pcut3rvk, *s $2.000 \; \Omega$ 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 through an : bs,h1dlza5 qew-c*p $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What cgwviz/n;6c. i2yrc ad553 tw murrent will it draw?

  A 150-W light bulb running on 1hon 5/x3 i0dqy10 V draws how much current?

  What is the nominal resistance of a 100-W light bulb designed to be usjb qqgk(l:11o0o+i y zed in a 120-V 11y+i0okozj(g qq :lb circuit?

  A toaster is rated 800 W at 120 V. What is the resis;e (yr dud37iatance of its heating element?ea 7ud (3ir;dy

  A 200-W resistor is rat i) 7p-8ajn5w yc-k9kun;xpsb9hz f-n ed at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated at uay a2 57w:l0xtfj3)ttkl4z -oimr4n $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is usf6z avh :*seog6gu x,4ed at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is its resistan xy1d(f3x,i :sever; vce?

  A 25-W soldering iron runs on 110 V. What is its resistanc7+nn auvipfbe*;m g;4ey )x x+e?

  How much does it cost to operate a 25-W soldering iron forc73jzep (pzp (54dgwkmv a2w/ 8.0 hours, if energy costs (vz 5p7g p4wjde/m (apk2c3zw$0.08/kWh?

  How much energy does a 100-W light bulb use i,;rwyok,f8,o zq z5c5 jk.nbin 8.0 hours?

  A 1500-W heater is connected to-a9r(yfo wj rvg gj0r(:f nx:u:o4wt- a 120-V line for 2.0 hours. How much heat energy is producedf: -trgo9ogw(j(r :na4xw j:yu -vr0f?

  A battery is rated at 12 V and 160 A-h. How muc8 )24agb cq yth0*pppuh energy does the battery store?uh4q8g p )b0ctpapy* 2

  How much energy does a 25-W soldering iwn xqovzd 3(59542 pra1zxkw fron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming the power compa6*(js 6vancle b5q hh8cu 8b+eny charges 10 cent u6hhb 6(ncs5+e* ec8vblaq8js for each kilowatt-hour of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turnen anj, qma/9(pd on 8.0 hours per day. If electricity costs 10 cents per kWm/aq,npnaj 9(h, how much does it cost to run the computer annually?

  The monthly (30 days) eleca3+4yncrn+ xk1*m*ixo jpr y 1tric 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 contributer3nx* xy*i +jcyop4 a kmn1+1r to the cost of the monthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element in an electriclu,idzx2s woxifx.+( 4.tv0s 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 temperature i+4oi s0vxfzd2i(s.t wx u ,xl.s 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 floweko 7 pd6dn; /i3d.azsmbq 8m(s through $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costszvxt q)ub (gx 7l)*su. $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 w 3:/y oiigw x:9rh 3de;p1p)tl0 qqiu60% efficiency. How much current does it draw from a 120-V line? ireoiwd 0yiq1h9: ;ug3p :x3)wl/q pt ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rms current fxu/kem zz(txoa4gp; j+s22h3x v:2jn lows thrnzp: m sx2kv4x/e(axg+;johtj z3u2 2ough this device?

  A 500-W device is connected to a 120-V ac power source. What peak currhq 9m9cvy bg,8ent flows through this device mvgh9yc8 q9b,?

  A 500-W device is connected to a 120-V ac power source. What is the 29b04 n8( mngmgnb5alje ms3lpeak voltage acr e( mmnn4lnj9g3sb8 blgam2 50oss this device?

  The diameter of a copper wire is 0.081 inch. The maximum safe current it can ckb uqhp (xzv.m:398wsarry (in order to prevent fire danger in building construction) is 20 A. At this current.8b khw p(v3 usm:xz9q, what is the drift velocity of the electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)