A device that produces electricity by transforming chemical energy into electriv( v;hu) tjh*ical energyvh )j;vt uh(*i is called a

  A car battery

  The total amount of charge that passesgc ma zkfdz)d7hjlri1pu.4:v t:7 l, 9 through a wire's full cross section at any point per uni9kr7 v 7lcglim:u:4)dz jzp h1,a.ftdt of time is referred to as

  The direction of convention current is taken to be the direction that+0u bip *g2wu.6 ffuuj

  A coulomb per second is thepz(*i0qqfuj5 same as

  Car batteries are rated in "amp-hours." Tehh98 5 im-/died.zta his is a measure of their

  The resistance of a wire is dnl g: l66g+sub9gvx /hefined as

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

  The resistance of a wire isw516nyytiyr;i1 u 4 me

  The resistivity of a wq1l95 ;k *xbxjkdf*uvby0ikr/ + iof0ire depends on

  Which conducting materiac.01aaz b58n o adqb0ll has the lowest resistivity value?

  Consider two copper wires. One has twice the le,ig*:o)ddr +.hf p gsxngth of the other. How do the resistivities pfd+g )sih.d:or*x,g of these two wires compare?

  Consider two copper wkhy12bb t)j-n ,gy gx+ires. One has twice the length of the other. How do the resistances of ty2+1hy n,g)b-jkbt gxhese two wires compare?

  Consider two copper wires. One has twice the cross-sectional are8w:k60 kjx) ebt/cna ca of the other. How do the resistances of th6k 0c:/ k tjacwxn)8beese two wires compare?

  Consider two copper wires. One has twice the length and twicexmuy 4j:nqdmid58c95 the cross-sectional area of the other. How do the resistances of these two wires compar49:mm5q j58 dcniyduxe?

  The length of a wire is doubled and the radius is 1g*/ 0lxk auh:5akaxndoubled. By what factor does the resistance change?n k0:aagk5hxa* /x1 ul

  How much more resistance doez,.r n3ll+m;qz /qdbus a 1.0 cm diameter rod have compared to a 2.0 cm diameter rod of the same length and made of the same mater r.u,l;q/mznd l3z+ qbial?

  The resistivity of most common met+4ff *m.w6va7gx lg nlals

  Negative temperature coeffi3i u5 cefln6*pcients of resistivity

  What is 1 W equivalen).n omr;an,v2sf8vl xt to?

  A kilowatt-hour is equivaop2ht4bxf;b(sh p-; /wxaeb5 lent to

  If the resistance in a constant voltage circuit is doubled, the.ul599es jyfk:*d s kd7s 8hxr power dissipated by that csk8 :ls fud9.59j7*dk erxyhsircuit will

  If the voltage acrossmo igh3q/u,f 2 a circuit of constant resistance is doubled, the power dissipated by that ,ogfh/3iu mq2circuit will

  If the resistance in a circuit with cons89ahiq knq5;ht p74cn,h olralh 4;;ztant current flowing is doubled, the power dissipated by k; lqln8h94pr;, tqai hc;a547 ohzhnthat circuit will

  If the current flowing 2ejiv 3)ja qq6yhhj)5through a circuit of constant resistance is doubled, the power dissipated bv3)jhe qi)jha5q6j y2 y that circuit will

  During a power demand, the volt. w5lj :h)g ev7f5vakqage output is reduced by 5.0%. By what percentage).qlfjvakwe75 vg:5h is the power on a resistor affected?

  A current that is sinusoidal with rehg87*f2kgpvq spect to time is referred to as

  Consider two copper wires each carrying a current of 3.0 A. One wire has twice i;fh7p 4 1tgoo +qmap1the diameter of the other. The ratio of the drift velocity in the smaller diameter wire ti;ph7 1f+p mtg1o qo4ao that in the larger diameter wire is

  Materials in which the resistivity becomesd dtw7 rfb;)1i essentially zero at very low temperatures are referred to ad)7w i1 r;dtfbs

  What current is flowing if 0.67 C of charge pass a pointgm xdy7qt2qy; o;:(ja in 0.30 s?

  A charge of 12 C passes through an electropqk. ,ug-rjfjwx- 3 j i.z:*yv:j7huzblating apparatus in 2.0 min. What is t.bju : uzqj f.xj7 zwyv,ij3-gkr*:-h he average current?

  How much charge must pass by a point iszeobltt,e:qp;q - 39*:0qaqyr sm9cn 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 i5r:;hvzias) ,p1sg* q9 kt xyaf $4.0 \times 10^{16} \; electrons$ 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 ae qtl6/)3 qjkA of current, has been left on for 10 min. What is the net number of electrons that have passed through the coffee q t l36)/aejkqmaker?

  In an electroplating process, it is desired to deposit 40 mg of silver on a mes mr3+(83d an;nqjjzv6e6htxtal 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 atomic vnd3t 68ha ; 6jqe+(jmz sxnr3weight of silver is 108.)

  What potential difference is required to cause 4.00 A to flow thro9wm53m4hy5gth,w5 b bnr zd 1vugh a resistance bhr z 41tv55nm9wwby3h5g d,mof 330 W?

  What is the voltage across a 5.0-W resistor if the current thfv 44o ljf-x+frough it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What curre-)gqd a ;3ewmw3qf;yj y+:zcknt will flow?

  A light bulb operating at 110 V draws 1.40 A of curren ;s ;8nzdcdvmynye-7dgs:oek /b y 96j.r4 xz.t. What is its resistance?ne6yr ncy9vg. x;dydbd os4m/-.: kz z s78;ej

  A 12-V battery is connected to a 100-W resistor. How manye9+l; ua:acr r electrons flow through the wire lu arr:9ea ;+cin
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0.4rw84 o 2wuwqq7bbj .j d/qyd4+0 inch? (The resistivity ord2wjqq w7b.ub 4o j4/dwy+8q f 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, mqm0b bsp5o2 ,x*:tbl-ns + vtif the resistivity *pblo0sv n,s:bt- xm5t+b 2m qis $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper w2 yc thvy*gq2,-bu6uqire (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 (res lj sr2f k( d:,ugvthe8 ejd+:s6vy/4xistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 m long, measures 0.04z+pz kmv(8ikgn e6 -7h0 ohms. What is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge (the radius is 0.321 mm)q nsfj+i4 + p.a,l3ldx nichrome wire if it is connected to a 12.0-V battery. (T dajn 3 slf+q+.i,x4plhe 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 x daw38c; .2/mzim xklt2.0 cm. What is the voltage dropxl2m3/t8.wickd; mza 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),tb4do 2wf nb 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 copper wire zcl, unx9yg8 0(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 resistanc2kkkaze q r2 +c3yd 8cw-jx0b1e 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 coefficienzrv t5ha-5yr(i r9rs ;t 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 determi3 oa kus8g0k2)x3susmne the melting point of indium. The resistance of the platinum wire ixoas)m us3g08 2sukk3 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 a2a1 kr0rv)8w, kljmso n $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current will iookuq*,y+ v au0 3p+gct draw?

  A 150-W light bulb running on 110 V draws how much curren,n0) n9ramh yhvfn my-x q*ya/0s-5z ,mnsyr +t?

  What is the nominal resistance of a t 9 0lbdlr*uu-xt3l a5100-W light bulb designed to be used in a 120-V circuit? lx*t-9r3 abl5t0lud u

  A toaster is rated 800 W at 120 V. What is the resistance. chlrkgy*)yn(;f -vr of its heating elemenrfh -y(n cgv).ylrk* ;t?

  A 200-W resistor is rated atbo0thv: e q5)j $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated at : g:uosbq) x;x$1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it ist:stfw*9y4uahmj86g used 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 resista kac +ny,9mam.nce?

  A 25-W soldering iron runs on 110 V. What is its resistanct6nr7*ne6 hx+x+ txb5w fh -zde?

  How much does it cost t ,pkj/ )gq.1uts.vun6vx e:bjo operate a 25-W soldering iron for 8.0 hours, if energy cost,js )qeg/: v.ju x.utvnbkp16 s $0.08/kWh?

  How much energy does a 100-W light b44ppaf pwty -*ulb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much heq0+e /eui xvm:m;t) nrat energy is product)ium0xnveerq/ ; :m+ ed?

  A battery is rated agxsz -ez(ye85b7bz 9ht 12 V and 160 A-h. How much energy does the battery store?yxs78 h ezb5ze(b-9gz

  How much energy does a aad4hkot.e 40o k7:md 25-W soldering iron use in 8.0 hours?

  A 100-W driveway light v; a51n/3ov z*mbi vh.0btoflbulb is on 10 hours per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricitho*; bi5 1vf0 /mvbtalvo.z3ny used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor)x .7c).whsxoxyesd bi3urm 14qb+ -1p is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to run the computer a+pxobcs-.7i)b3du 1.rx hw14me ys x qnnually?

  The monthly (30 days) electric bill include6x wpbr c7fd(oy95l :bd 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 the cost of the monthly electric bill if electricity costblw:r6xo y9bfd5 7pc(s 8.0 cents per kWh?

  The heating element in an electric drier operates on 240 V and generates heat arjn 4d bq 3ign2sgxkq 05:v/i1t 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 have on i: ir n2v5dksqbj/4qgg013x n the power dissipated in the heating element?

  14 A of current flows throughrf((zj; v8m hw e3u)in $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs 7 , jz0qubxj6v$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 wbmxc:2/ojxm u:j; 2gd /is;wwork at the rate of 2.0 hp has 60% efficiency. How much curreowsm m/2x2 gdu:w:i/;;j bjxc nt does it 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 currenf,znf lc946sut flows throu , lufsz4fn9c6gh this device?

  A 500-W device is connect3us*ypyb;sra uk +5etj3e.t x1b ib 9.ed to a 120-V ac power source. What peak current flows through93;1au kt se 3epstrbuix.y 5+jby *b. this device?

  A 500-W device is connected to a 120-V ac power source. What is the peak volx 7;3+r gowldrtage across ;w7ld3+xorr gthis device?

  The diameter of a copper wire is 0.081 inch. The maximum safe current it can ca/pll e:inop 78rry (in order to prevent fire danger in building constructioioln /le 78:ppn) is 20 A. At this current, what is the drift velocity of the electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)