A device that produces electricity by transforming chemical energy i;baw q q3mt+,uicwlk0hu w 38c(hp9*anto electrical energy is called awa8w cp;twmc * ,bu3(ihhqq09k3+alu

  A car battery

  The total amount of charge t px:54ion2w snhat passes through a wire's full cross section at any point per unit 2xio :n45nspw of time is referred to as

  The direction of conventi/jtf;l 7x*wl:cuev0 m,ro8urro6pr5 on current is taken to be the direction that

  A coulomb per second is the sa5 jv-h hlm-ue(pl)st1me as

  Car batteries are rated in "amp-hours." This is a me) (eej iw(pg;:tktc :f nbm(t/asure of their

  The resistance of a wire is defd +u3rst(g-*p4 pnz moig75pb ined as

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

  The resistance of a s+ jm3 5cfs:uz()nve bwire is

  The resistivity of a wire depends ql ur)wdlt8- lghf 9::on

  Which conducting material has the lowest resistiv vtr/t9zgne-( rur-;n ity value?

  Consider two copper wires. a veo07 /hch8a One has twice the length of the other. How do the resistivities of ta80av 7ho c/hehese two wires compare?

  Consider two copper wires. One has twice the length of the other. How do3wvh ;/0 l*:tnbqka0 tb)jv kb the resistances of these two w 0v a k; kwl0:nb3*hv/tbb)tqjires compare?

  Consider two copper wires. One has twicq70oc)15iu3 t0phep vtx :z ite the cross-sectional area of the other. How do the resistances of these vic ot317i5:0xtzhut q) p0petwo wires compare?

  Consider two copper wires. One has twicegs6 7v(gspf;w the length and twice the cross-sectional area of the other. How dfp(gs ;v7wsg 6o the resistances of these two wires compare?

  The length of a wire is doubled and the radius is doubled. By wha5f dc;1/agcjo1lvq+ xt factor does the res5/jx;1d1qgc lv oc+a fistance change?

  How much more resistance does a 1.0 cm diameter rod have compared to a 2.3l+kdw wep7fa w71 )q)ao 2igd0 cm diameter rod of the same length and made of the same mata7 lwwd+)2gd1iop3 )awfqk e7 erial?

  The resistivity of most common meta/..h.1gnqj mr2zxwm x cn:tuy q6x4- dls

  Negative temperature coefficients of resistivi,yua69 ea/qut xu6jzj(; r3cuty

  What is 1 W equivalentk4 dj:4ta9vs(bs n0ed to?

  A kilowatt-hour is equivuxx,zk ys uajb 5+-;g0alent to

  If the resistance in a constant voltage circuit is dyw2 lub+ ta0;qoubled, the power dissipated by tw2a;+ u0qbyl that circuit will

  If the voltage across a circuit o xw)n+-r6m qgg(q uzn-f constant resistance is doubled, the power dissipated by that cirnnqr(- ) q-+uwmz6gxgcuit will

  If the resistance in a circuit with constant current flowing is doubled, the po 2*rtj8x qsl7uvqoi7*wer dissijv *tl7iq*urx 7qso28pated by that circuit will

  If the current flowing dzvmy mx:u: hs2(q*x /w/m.xc through a circuit of constant resistance is doubled, the power dissipated by tdz/quvmm*(wcm.xx:/h :ys 2 xhat circuit will

  During a power demand, the voltage output is reducea6 b b9 crvq,uacy9:tu8ta yp-me;0r .d by 5.0%. By what percentage is the power on apva a:9 bqyra9e 8.6c0 -bu,cum;ttyr resistor affected?

  A current that is sinuso;jzluo k 864:yuy+klmze-bz)idal with respect to time is referred to as

  Consider two copper wires each carrying a cq/q+ 7nuu8:+np g jsnn2 fvht3urrent 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 the larger diameter wire:7u gns3j /vq8qf+nnh tn u+p2 is

  Materials in which the resistivity becomes essentially z5ql i-dsp 2sjxd/o+2vero at very low temperatures are r52spd+j2sq/x-d i loveferred to as

  What current is flowing if 0.67,6bn, dvk3 uoh C of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus in 2.0 min. Whg7s0c d gf7s) dl/z1brat is the average current?0zg f1/s dbgr )l7csd7

  How much charge must pass by a point in 1 /)vv04uzicyj ;wbkb30 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 if zo/ lf7s klab6t;pms aw5b5shn*s, 99$4.0 \times 10^{16} \; electrons$ 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 for 10 min. Whlv 9h/fkpe;:y3oh)w)rgb n :kat is the net number of elect gk;/fkh :3ylh rev)9 w)pnb:orons that have passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg of silver on a me j4w1w/+ oxkjtc, dt w4pl*+fztal part by using a current of 2.0 A. H+d1wjljt+ 4 o /pwtfxk *4cz,wow 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 th *om9* )wxc7a-hjs).a im i gtkb/itg(rough a resistance oja*(ah9/b*c m .i) i -mtsxgw )gitko7f 330 W?

  What is the voltage across a 5.0-W resistor if the current throughp;q :k e-vxj6x6r jn+ x1jfb q,2m-qwv it is 5.0 A?

  A 4000-W resistor is connected across 220 V.rf2 irsmfuwqs m 310b tq,j:xg07 os0. What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its res-q8uny.xl;bw istancew 8 uq-y;lx.bn?

  A 12-V battery is connected to a 106):9qdlfh r vyeqbezo2 .8v2lr;4xb i0-W resistor. How many electrons flow through the)efzl;b.v8e qb hdiv9 lo 2:x6r4 2yrq wire in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter og/njdke28 w/ -res7j0.40 inch? (The resistivity of / eg n2sw7jdj8r/ke-o copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameter and 4 m7 dnd-4dz,ht5 m long, if the rdm n7d-d t4,zhesistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (rex(yz9zo 6vz b+sistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (rv mk(p)sc 0m4sesistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 m long9tj tnr(wwm8-, measures 0.040 ohms. What is its resistivity?

  Calculate the current through a 10.0-m p)/7y7 oh9t6ef eun v0qx.pfnlong 22 gauge (the radius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. (The re xyo96ep ffn)t. up e7vh/n0q7sistivity 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 csg2t46lu z-u tm x 2.0 cm. What is the voltage drop along its length when it carries 4000 A? (The resistivity of c-t4ut lzusg 26opper is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichrome wire ha-+ nw4bihkik +s 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 wiqfnh g8 8;fjmhdy5uduq* 034)fi vc z+6 (frwyre (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 ren(nzh q 3o9j, bv c7;uz(ktno,)i8mv dsistance 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 coefficic5*(2q)p()zjp d rv bhmnwm 6gent 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 determine the melting point pbhi9: hie8al* cv,9c of indium. The resistance of the pi,v la eh9c:c98hi*bplatinum 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 through an9vs0d- ursteio7 o9coi.*)s x5sli : 2omzj4w $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current wt9f:x zv-v.w.hc zp9 yill it draw?

  A 150-W light bulb running on 110 V k kp8s 3hol,f7zub h-p*7zdwjun s/chsl 2 9:9draws how much current?

  What is the nominal resz lgns 7mc:bm:oy2f8.istance of a 100-W light bulb designed to be used in a 120-V circuitm7 82m nb:osl.gzcf y:?

  A toaster is rated 800 W at 120 V. What is the n it)d+ yg3zn)resistance of its heating elemennni d+3)t)ygzt?

  A 200-W resistor is rated*wm.l0v p4w spm2 tr/c at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rateco8xpl0c*/ qnilbad v10qh 9 3d at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If i0je2 b98jt e;yu8ept f0 6rlgct is used at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. Ifmp 5o wnm1 r56+czp.cs it is used at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What*s k7m,vp/sgj is its resistance?

  How much does it cost to operate a 25-W soldering ir keg(::k3weo(j xxan4ify y+ ,u r+(nzon for 8.0 hours, if energy cowgf k o:zj3( :(yxiu,e x ykan+n4re(+sts $0.08/kWh?

  How much energy does a 100-W light bulb use in 8.0 houn2a xwm(i5s )g)pga7irs?

  A 1500-W heater is connected to a 120-V line for 2.0 7:/ ipadoe*teh1f qm/hours. How much heat energy is prod hm:of *q7aie d1t/e/puced?

  A battery is rated at 12 V and 160 A-h. How much energy does the battery stovv5r7 jj p;/celm;:1lx umu7k re?e;m5 u kj7p ;:jxr7c/l1vuvml

  How much energy doespty): 5xz uf6p3dd4uas15n(ff f9nko a 25-W soldering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Asqcf. 7xb0 uza)53wuwpsuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cos3b7pwuwcu5 fqa 0 z.x)t to operate the bulb.

  A 400-W computer (computer plus mon9 da2(0)n0e w lebbwajitor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much doeswb ea0j(ae nd2b) 90wl it cost to run the computer annually?

  The monthly (30 days) elect2unfvxzfxle*1 0f :6 rric 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 the cost of the monf6 v0nfx2ul1:xz* er fthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element in an electric, bics8(-zaq *vo;inc 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 is unchanged. In reality, the resistivity of the wire will depend on its temperature.) What effect will the repair have on the pc(s- ,n*a bicq;o8ziv ower dissipated in the heating element?

  14 A of current flows thrf cr25kkawtqj1f5fjt 2t* : q(ough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs2;xpxi(8tu jj $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 60% efficienez6-fbq bvc.3 bh /w(zcy. How much currzvbfb-c.hqe6(/b w z3ent 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 rm j6o2df:l n6jfs current flows through thi6ff2:6odjnj l s device?

  A 500-W device is connected t o513jq+tvot xo a 120-V ac power source. What peak current flows through thi x1 o5ovq3ttj+s device?

  A 500-W device is connected to a 120-ct(n j yw(.r5.znog- eV ac power source. What is the peak voltage across thisn -ogn(.wycr e5z.t (j device?

  The diameter of a copper wire is 0.081 i (rtibka; *k2xnch. The maximum safe current it can 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 number of electron carriers in onkx*(2a ;rtkibe cubic centimeter of copper is $8.5 \times 10^{22}$.)