A device that produces electricity by transforming chemical energy into ele )hsnas(x w; o)vpvq58ctrical ;x(s vw5hs)8 nqa) vopenergy is called a

  A car battery

  The total amount of charge thac4ix8drjb yp.79ks 7ft passes through a wire's full cross section at any ps7 9jfb rip7.c x4d8ykoint per unit of time is referred to as

  The direction of convention current is taken to be the direc9h+rzh o3xv /vtion that

  A coulomb per second is the sam 6lka .lv-fze0e as

  Car batteries are rateub) 0tudd*nv2l l.)qzd in "amp-hours." This is a measure of their

  The resistance of a wire u2r7gkj hjk4npa5g* (is defined as

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

  The resistance of a wirejc0a wu*c m/7q x:rt:7 qok.ba is

  The resistivity of a wire de,.+go u fc*sj,/qxje5ubj p+ spends on

  Which conducting material has the lowest rebp rxc.e;8 wuj )v)sk*sistivity value?

  Consider two copper wires. One has twice the length of the otj d;mczt1b;,t)gzvd +her. How do the resistivitz;t, mb1g+zdj d tc)v;ies of these two wires compare?

  Consider two copper wire5jgti0m, pa4b s. One has twice the length of the other. How do the resist t,ip 540mgbjaances of these two wires compare?

  Consider two copper wires. One has twic1yc4vpv5iko q-l,j+f doq ; x.e the cross-sectional area of the other. How do the resistances of thy;q cjv lk+q.f4,dv o 15xi-poese two wires compare?

  Consider two copper wires. One has twice the length and twice the cross-sectl0jzk7 jus /1ep d+7rrjh5e0wional area ofu7rzjjhe w1e/j+ 5k dl0 s07rp the other. How do the resistances of these two wires compare?

  The length of a wire is xw+ 3c ep/nkt:doubled and the radius is doubled. By what factor does the resistance change?k:t3pc/x+e nw

  How much more resistance does a 1.0 cm diameter rod have compared to a 2h: iz x q+hwmb2nnr4qlc)em0331 gx3 vg8wh6v .0 cm diameter r 30hi4 b)m6c:w 3 8rhzxln3e1mgvhwqxqg+2nvod of the same length and made of the same material?

  The resistivity of most common/p. wvqrt2-yx metals

  Negative temperature coeffi7t3- cmzoupr d uin4wg 1*9*bycients of resistivity

  What is 1 W equivalent t-ccivx b/zmjz +i3: z4*ltry8o?

  A kilowatt-hour is equivalent t4a4s wr3gu km.o

  If the resistance in a constant voltage circuit is doubled, the power:qq wt-lyy /4s dissipated by t: w y4tl-/qqsyhat circuit will

  If the voltage across a circuit of constant reshnqj ( e f1l4-s25wureistance is doubled, the power dissipateej-lw4ru12n ( qs5 hefd by that circuit will

  If the resistance in a circuit with constant current flowing is doubled,:r ulfpzig 4w a+(a;m:nbjok .im9ghj+ .*-oi the power dissipated by that circuit om(kiar:b+ fjwlp g.4gh:o* 9ua i;m- j+.zni will

  If the current flowing thris ;t 8j9agsbus.(c9 pough a circuit of constant resistance is doubled, the power dissipated by that circuit wil js9iab.sc 9(g ;ps8tul

  During a power demand, the voltage output is r5bycem t26yqjq *qj ;*educed by 5.0%. By what percentage is the power on5 2j*y 6b; *qqecmtqyj a resistor affected?

  A current that is sinusoidal with respect to time is referred to)q jmiw /q4hf3 as

  Consider two copper wires each carrying a current of 3.0 A. One o1bc*l0xgul2 i;qy:*h + 6bxkh3 lgtqwire has twice the diameter of the other. The ratio of the drift velocity in the smaller diameter wire to that in the kh+1*l3xt:;l 6l0*q bqcgbxyi2oh gu larger diameter wire is

  Materials in which the resistivity bd72z 38 qbdo3oz)t7 entdg8n2nb 3nc cecomes essentially zero at very low temperatures are referred d tz nn82t)nccd3oqn7 b7z23g de83obto as

  What current is flowing if 0.67 C of chq d7., e9*bg m:q:owp l:xffpoy0k)dg arge pass a point in 0.30 s?

  A charge of 12 C pas( bdnun g(9eb4 mvfj56ses through an electroplating apparatus in 2.0 min. What is tu4 5gemdj (nn69bf v(bhe average current?

  How much charge must pass by a pn.+tuj fa t(5goint 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 flowing if 6 (xcz0owno0 a$4.0 \times 10^{16} \; electrons$ 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 13.5k p(b1e6whne;gj0d4 jgu 9i(u A of current, has been left on for 10 min. What is the net number of electrons that have pa4( uge19i kjwhd0;nub 6( pegjssed through the coffee maker?

  In an electroplating process, it is desired to deposit 4-2)qfz i :f.soyp7x ib0 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 deposit this much silver? (The silver ions are singly charxp)byifoqis f 7 .-z2:ged, and the atomic weight of silver is 108.)

  What potential difference is required to 5)d3xa+o)kzxu0hyr ucause 4.00 A to flow through a resistance of 330x)ao +dxu0)5 3kyhz ur W?

  What is the voltage across a 5.0-W resistor if the current throur- p462g g dai 4ox)r7oz 1vq(k6jjzrtgh it is 5.0 A?

  A 4000-W resistor is connected across 220 V. iwxd gg(te*mz6c8(7 1f syan9What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its r,at5p mg 8r8yjesistancert ym j8,5pag8?

  A 12-V battery is connected to a 100-W resistor. o zqf 252c/uce How many electrons flow through the wire i52cf/zc oe2qun
1.0 min?

  What is the resistance of 1.0 m copper wy3ji dw skf*a.6es;pj)t.4optw p:l6p6ms.gire of diameter 0.40 inch? (The resistivity of coppertl.p;e 66w. sajsppmw*6f gi.p) j34y :tdk so is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in dik x99zm7niop1wb)4fi;v.id fameter and 45 m long, if the resistivity 7pz91o dimb)f9;f4kiwin.v x is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire 8ccru jg+r(,x ce0fu ),fso+f (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 (r;8vd v,bnxu-(kryhel-w b3b 9p h7- cresistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) 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.nhh4zu+;y 8zn What is its resistivity?

  Calculate the current through a 10.0-m longrp*5yy f:+ib(e / mlvx 22 gauge (the radius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. (The resistivity oe( lb5vyi *yr/fxm+:pf nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and of rectangular cross-secthy h dfz*ysf6px)4: o8ion, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carriesd)*h fyho64zy fs :xp8 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 0gavtz+frpv/ ;;4e 98a n1 pynv.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 co3 kdk,k6tiopa) r.:0 yge fxu9pper wire (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 805veuvwvi u vh-*z n: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 coefficien-9f1t ekq3 qxlf2e+go 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 determine the melting point of indium. The:zy l b8mes4 va3p w33ss)wwafnt+ .q* resistance of the platinum wire isea)wmss +w4q .plawns 3*ybvf:tz 338 $2.000 \; \Omega$ 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 thro6ef6rmq*lfe (ugh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200i*gl..a)h7waz ljmsk,db d (0 W. What current will it draw?

  A 150-W light bulb running on 110 V drawhajm p-f0 j8l1s how much current?

  What is the nominal resistance of a 100-W light bulb designed to jnn74rv ,-+ad*q rsiy be used in a 120-V ci,-j in*4+qsr dr7 yvnarcuit?

  A toaster is rated 800 W at 120 V. qm2rhcml gu2sl b,:s9+ d.;ho What is the resistance of its heating elemen+chlm:s 9gd. hs2lbomqr 2,;ut?

  A 200-W resistor is ra6e3gq+xbe q cq7qh5f 4ted at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ratedg g9hai j9 ao7b))5uzx at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what curren o4k+9m/ r)thqhqr +gst does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what e*kt (-3 +mffdtup. *wglr lcdb2/j3qis its resistance?

  A 25-W soldering iron runs olfs) f/9 yua6)q6dc:mp:wmxd n 110 V. What is its resistance?

  How much does it cost to operateg(5v ,wjn2 dgd*4 1z xauc lti:+mef-v a 25-W soldering iron for 8.0 hours, if energy coststfalimjv5ev uwg d,:z 1 +cx2*n4-(d g $0.08/kWh?

  How much energy does a 100-W pbubu u*vm4*/s0y - mblight bulb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much heat en* .ti1arco1b dergy ist co1ri. a*b1d produced?

  A battery is rated at 12 V and 160 A-h. How mucw ygg/ .d7 )ke lx8eggs,my4+yh energy does the battery store?k7 d e/)ys egx .4,gylwggm+8y

  How much energy does a 25-W soldering iron use vodu,*8d7 +zeyvj z-b in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming the power company edj;e wap2 (6kcharges 10 cents for each kilowatt-hour of electricity used, estimate the annua(e6ed j;a wpk2l cost to operate the bulb.

  A 400-W computer (computer n p1 +catsab)l6 ds1pst,nu9. plus monitor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does i)su+ a9n 1adtt6l,ps 1.ns pbct cost to run the computer annually?

  The monthly (30 days) electric bill included the cost of running a central ai+ gr do( *xo6x(lrdn-ir-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 8.0 centsd ro-ox+6in dg((l*rx per kWh?

  The heating element in an electric drier operates on 240 V and geuchmw n :wp*kuag22,9uec du c8+7,olnerates heat at the rate of 2.1 kW. The heating element shorts out and, in repairing it, the owner shortens the Nichromhw9gu u ul co eud2apk82,wncc,:m*+7e 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 zxrzj;ldvf ,9,tp8z 3through $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs cf(pyh, zwt0 fpn- 0*j$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 ratzk4 7hi 4gcz*be of 2.0 hp has 60% efficiency. How much current does it c7k4hg* 4 bzzidraw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rms c ec4c /vbu:v:4z+q4aczy +ozzurrent flows through this de44ez+z:z:/a vzbv 4c cc qouy+vice?

  A 500-W device is connected to a 120-V ac power source. What peak current fl m(u24p2 .g 8si ydodm-;quuosows through thgq2i4u(ous d 2mu;o -py sm.d8is device?

  A 500-W device is connected to a 120-V fv jyqhbnc3d ,ln pg+5;i;u68 ac power source. What is the peak voltage acrndu3bif;5 l,jq 8gy+pn hv6 c;oss this device?

  The diameter of a copper wire is 0dolh3 )4hmf,8kiv p2a.081 inch. 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 one cubic centimeter of k3ih )2fh4dpm8lo a ,vcopper is $8.5 \times 10^{22}$.)