A device that produces electricity by transforming chehvi kx*ca48.z mical energy into electrical energy is callcaki * vhxz84.ed a

  A car battery

  The total amount of charge that passes tlr9)b zs0y1xu4 ehy-, 1nbxsthrough a wire's full cross section at any point per unit of time s14b,e-rxsb)yntu l x0y1zh 9is referred to as

  The direction of convention current is taken to be the :jipd.gva2s 0direction that

  A coulomb per second h7h(6s ohpw- c*agf2jis the same as

  Car batteries are rates);k-v v8 ydq7ges7dr d in "amp-hours." This is a measure of their

  The resistance of a wire is defin/plvs vfk0. (ued as

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

  The resistance of a wi-lkmwxu(5sm 3d0fi *ya t.-d kre is

  The resistivity of a wirlyz5*cik a ri 1tu11,ae depends on

  Which conducting mat* cr/t d:8mvuuq 7b7xlerial has the lowest resistivity value?

  Consider two copper wires. x-aul42 0 rkavp t+-kmkf ft.)One has twice the length of the other. How do the resistivit fv)+kr4tlk-ufx-m k.apa2t0 ies of these two wires compare?

  Consider two copper wires. One has twice the length of the other. How do the rpz y8(9zglmr6hyk(so*x 15ik esistances of these t5h((lkxorpyz 8gsyk m*69 1zi wo wires compare?

  Consider two copper wi k4i l a 4h3-rlvcopap:)5pi6gres. One has twice the cross-sectional area of the other. How do trhpil aipa):co34v4 p-gkl65 he resistances of these two wires compare?

  Consider two copper wires. One has twice the len89 h8: kmguw p giw (hc:;mmy4;xcdo0lgth and twice the cross-sectional area of the other. How do the resistances of these two wires compdo8hc:w (y8 ;l0xmpkmu9c gwh:m4g ;iare?

  The length of a wire is doubled and the radn v83832m5ymxw hxbzl ius is doubled. By what factor does the 2x5h8vm m3 wnzxly8b3resistance change?

  How much more resistance does a 1.0 cm diamete9fejum s0t9z .r rod have compared to a 2.0 cm diameter rod of the same length and made of thmt90su.e9 fjze same material?

  The resistivity of mor+ p7sl5fuu ,ost common metals

  Negative temperature coefficients of resistx 6w 1-dhhbb3fbnv)g +ivity

  What is 1 W equivalent t(b4e)c;y jbiyu hki00o?

  A kilowatt-hour is equiv f; cerj64bt-savs57m 5mrt )walent to

  If the resistance in a constant voltage circuit is doubled, the po 7mn6 hxx;8bexwer dissipated by that ci;76ex8nxbm xh rcuit will

  If the voltage across a circuit of constant resistance isni8)w jxnlkuw0dd55s25d.y q doubled, the power dissipated by that circuit willd55di )w8ys0k2 xuj5 lnw nqd.

  If the resistance in a circuit withb/15csvm4 g1iiapk -q constant current flowing is doubled, the power dissipated by that c5pga 1ksmib- 14/v iqcircuit will

  If the current flowing through a circuit of5lwfd rak.,m( constant resistance is doubled, the power diss ,.(ldmar5kfw ipated by that circuit will

  During a power demand, the voltage output is reduced by 5.0%. By what percentm9c* p q jcv*dlrt29oo- q4wd.age is the power oncmqo d4-t* vdj2.*qwp9 r 9clo a resistor affected?

  A current that is sinusoidald(whuq bygc2 ;m,k9tbv*j- 1f with respect to time is referred to as

  Consider two copper wires each carrydx*k ry,iu 6mp: g/h er-xax(*ing a current of 3.0 A. One wire has twice *6,a xr ye*xd:gu/ hpmri(x-kthe diameter of the other. The ratio of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomes esc ludvg+nt+ /2sentially zero at very low temperatures are referredtv+/l2 u+dgc n to as

  What current is flowing if 0.67 C of ywo )wavzy--2p78 ozecharge pass a point in 0.30 s?

  A charge of 12 C passes through an electropnt-c d;oksn01(ig jf2,q 9hri lating apparatus in 2.0 min. What is the average cg9 fjid;sn0 1 rcn 2kt-qo,(ihurrent?

  How much charge must pass by a point /uq-bys33-fwws( bu.oj otip /p3;xj 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 flowip e 16ym,sgm7rng 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 .s0f6l ni-szf m0ja3r b;r n)q.k,bxs13.5 A of current, has been left on for 10 min. What is the net number of electrons that have passed through the coffee sxn)6 ;- r3zlkqfb,r.sfaim b0jns 0. maker?

  In an electroplating process, it is desired to deposit 40 mg of sil +0- mgac5e1fey ik5opx ,tyv/ver on a meta+gfi/at-m,v e0xc 155 k opeyyl 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 weight of silver is 108.)

  What potential difference is required l4;8cc m qd6xmto cause 4.00 A to flow through a resistance of 3xc6qlcmm 8;d4 30 W?

  What is the voltage across a 5.0-W resistor if the current than6 2)uiyyb e2y 8iih3rough it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What cur9zup*wl 438ulri y9zu rent will flow?

  A light bulb operating at 110 V draws 1.40 A of current. Wxwk*x; 6o 7dyihat is its resistancey oxxik7;6*dw?

  A 12-V battery is connected to a 100-W resistor. How many electy/7f9, ks gv(sfik,rnrons flow through the wsf,r(kvs ky/gn 7,fi9ire in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0.40 inch? (The p1y6otys / y2vresistivis /topy 1vy6y2ty of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of vkmk) :nf:gc1 a circular rod 1.0 cm in diameter and 45 m long, if thcg:1n) fk: mkve resistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wi*24 og/assiiqre (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 (resistivitk o)kd,wgt.pbo 23yrg ,sy44 iy $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 resistivity,z( vsto6fu9:s i (sww?

  Calculate the current through a 10.0-m long 22 gauge (the radius is 0.321 mmi.. 1a n4p4hkv(j kf)p ikabj7:r4j hw) nichrome wire if it is conne (41a4 ijh.jik) kv.bnhp7w4r k p:ajfcted to a 12.0-V battery. (The resistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 2q:,4p 2 8 vxh4fvn*xw;ml soyn0 cm long and of rectangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it ca8plh ,qfsn:vy4x2mx4*o ;nvw rries 4000 A? (The resistivity of copper is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichrome wirec l8vrkk(hi.3 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 (resistivity :qd 5 jflkwq2415z dop/fx3vd$1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistance,)fah (r y+akh mzgsf7, (n6rl 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 resisti7epldan ;xc:o j3/0kjvity 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 detel ecv./vu 9t9xrmine the melting point of indium. The resistance of the platinum wi .xcvl /9t9uvere 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 througa;vmqlnm.n 1 +h an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 12fmka.q*0e 6u u00 W. What current will it draw?

  A 150-W light bulb running on 110 V *hhg vf i6p,6hdraws how much current?

  What is the nominal resistance of a 100-W light bulb designed to be usedvyuovzas)2;ry 45dy - in a 120-V ci-doyyy54a ;vvurs z)2rcuit?

  A toaster is rated 800 W v*bs ;m-bkgw;at 120 V. What is the resistance of its heating element?g-km;wbv bs ;*

  A 200-W resistor is rat7*pblraap* e:lz4mi(.x aa g+ ed at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ra+ t4k,hcj2mq nted 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 does it dki7f.c:bdggy88 i iz2raw?

  A lamp uses a 150-W bulb. If it is usedw( xibn*:uqu9 e1ymgrc b:-4o at 120 V, what is its resistance?

  A 25-W soldering iron runs on4d5 q xmkef0.f 110 V. What is its resistance?

  How much does it cost to operate a 25- m2d+d ;o8 qocxgf0i+cW soldering iron for 8.0 hours, if energy cos c+q;do20i dfx8 oc+gmts $0.08/kWh?

  How much energy does a 100-1csev6 be ,/my 4ch;nkW light bulb use in 8.0 hours?

  A 1500-W heater is connected -1f ewu nvtj35to a 120-V line for 2.0 hours. How much heat energy is pr1vnuwet3 fj-5oduced?

  A battery is rated at 12 V and 160 A-h. How much energy does the battery store0heq kmk;*m/x?* 0m k/exmhk;q

  How much energy does a 25-W soldering inq9l u6nwo*f3ron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming thebb/mo sq31x c e,mll-( power company charges 10 cents for each kilowatt-hour of (l me1 3c-qsb/lbmxo, electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (compu/5jszt((r pea ter plus monitor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how mt sr(ea(p5 z/juch does it cost to run the computer annually?

  The monthly (30 days) electric bill included the cn( ,2 1ohbvn*a1d ghs:k-xdy tost 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 costs 8.v kn2x11:,ydhhs(ad bg*-no t0 cents per kWh?

  The heating element in an eleca bxi((djxyc*v:2qk.tric drier operates on 240 V and generates heat at the rate x:c2jvk. *bxay(i q (dof 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 power dissipated in the heating element?

  14 A of current flows throud1v ze* rdr0 s0-vtdgu9b( z/sdz5b8agh $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs er/uhm1r2*x v$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 h8.e ,bmzv c,a4wj-wjh0h l.ixp has 60% efficiency. How much current j,xl jwev,c.a. h z- 8wb0mhi4does it draw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac poebs y8 ot6-gu mw9(ow4wer source. What rms current flows throuo6uwtgym4 bws o (e98-gh this device?

  A 500-W device is conne6nd tckf; .;csz0y6 zt1vm u*xcted to a 120-V ac power source. What peak current flowsy1ksdxtc ;z0 cu66.vfmz*;nt through this device?

  A 500-W device is connected to a 120-V ac power source. What/ 2+xzomeqg1v is the peak voltage acr1eo+v xmzgq/2oss this device?

  The diameter of a copper wire is 0.081 inch. The maximumesvvt-pt. 75r:ass;-fgpgq( 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 carr( at7-svs:p tsgv.qe;5-r fpg iers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)