A device that produces electricity by transforming chemical energ.ark,di f1n9calt om.e../ dqy into electrica,eir lanmfo. d k q1c..da9/t.l energy is called a

  A car battery

  The total amount of charge th m+pi9yd dd7d ;o92coyat passes through a wire's full cross section at any point per unit of time is referred todyd9i7dc9 o;mo 2d py+ as

  The direction of convention current is taken to be v6qm / +n*ua2npq3a87pcqffl the direction that

  A coulomb per second is the same ;.ofgm9ubuou ydx,1 x,lk 2w) as

  Car batteries are raqyt9)5a kd; re2i/k(fm m)gyk ted in "amp-hours." This is a measure of their

  The resistance of a wire c t3t 8-m3xakdis defined as

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

  The resistance of a wire isls2*r1:lm) rr c lblf6

  The resistivity of a wiiyy+ sfng( j 9u.8z1w 9ute.j3z1yuyezhr66zre depends on

  Which conducting material has the lowest resistivityk/q6 ujhea5u -e 2wft8tl4qt. value?

  Consider two copper wires. One has vum:w 0mn(tkq4b sf qlow6312*eeo (otwice the length of the other. How do the resistivi(4u2*0:q nvlqfe3ebmom(s6w1 ko o wtties of these two wires compare?

  Consider two copper wires. One has twice the length of thekg j3qi:i6bv s4guw;yx-rsqv 3xj ) 98 other. How do the resistances of these two)x sx3;ur94gq bi3qgk6vj-j s: wy i8v wires compare?

  Consider two copper wires. One has twice the cross-sectionqqdz w5:wz*b3g 5)ik8eib5kpg 5 z0xpal area of the other. How do the resistances of these two wires comparepezi5w5:k bq0i gqw5p xbk z 3g5z*)d8?

  Consider two copper wires. One has twice the length and twice;wc- d1lbhyw* the cross-sectional area of the other. How do the resistw y*b-1lh c;dwances of these two wires compare?

  The length of a wire is doubled and the radiu, w(gnbv q1lr:s is doubled. By what factor does the re,w( g:r1bvnqlsistance change?

  How much more resistance does a 1.0 c jjf/ry ds. dn-+e-kj1,h0zc wm diameter rod have compared to a 2.0 cm diametewdj0jrh+ /d -1f,jeny .-zcksr rod of the same length and made of the same material?

  The resistivity of most cojcs48lh qw( 7ix( d2kemmon metals

  Negative temperature coefficientb jz 1my- uj,wmz5t*5ws of resistivity

  What is 1 W equivalent to?0kargnegszzzyb6*-6pj. ci, a./f)t xh/ o(a

  A kilowatt-hour is equivaj3,fao1 ;aobjlent to

  If the resistance in a constant voltage cir; vna97xtxawb4hr4n ksb r0u . r,/wr9cuit is doubled, the power dissipated by that .4rsa4ra tn 9/;rx k ww,rv0n bx9b7hucircuit will

  If the voltage across a circuit of constant resistance is doubled, cw( -nkfaf7 :*//iqt ;qdhwzithe power dissipated by that circuit will kcfwq(w;:i td/ *niqa f/7-zh

  If the resistance in a circuit with constant current flowiph2k- z b kdn6sfpu58w6d,wx*ng is doubled, the power86p*6 k,2 -bnxk sduwph5fdwz dissipated by that circuit will

  If the current flowing through a x(yjki-u2k,l yqu.:3) lfjb a circuit of constant resistance is doubled, the power dis,:ujx(3k. ua b y2j)yik qfl-lsipated by that circuit will

  During a power demanay-tn u/6 uo1ed, the voltage output is reduced by 5.0%. By what percentage is/teu6uanoy - 1 the power on a resistor affected?

  A current that is sinusoidal wida9.l-*hgx0 ts csoic b ; wa;y6otk1:th respect to time is referred to as

  Consider two copper wires eaczx 7m-5 c;qjk u0 9zmri.gshc.h carrying a current 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 ; h 9cqjmr7zxmz-g ik.u.5sc0in the larger diameter wire is

  Materials in which the resisti:6zvjah;qv ku9)lhd a 23ugf.vity becomes essentially zero at very low temperatu daaz;kuhl)vqv2.hu3j 6:f g9 res are referred to as

  What current is flowing if 0.67 C of charge pasuy*19n(b ahf ss a point in 0.30 s?

  A charge of 12 C passes through aaq:ka r)g3b. hn electroplating apparatus in 2.0 min. What is the average cu qak3ba:rgh.)rrent?

  How much charge must pass by a point in 10 s for the curp7vl.fzz ow 8r7:mbkbs0/ 8qqrent 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 p5 (cz,gff sf48m+kxd 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 13.5 A of current, has been left on for 1(s.kft w,t1-ohgi/zx : (x fgh0 min. What is thotwt/z(f xk:h-g 1.xi( hfgs ,e net number of electrons that have passed through the coffee maker?

  In an electroplating process, it +np*yg 1f:c7luq uw*nttt*2z 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 deposit this :lc*2w y1 **pz+fttt nnuqug7 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 through a resistanlrgcmm(k+ 44t ce mr m(4tgl+c k4of 330 W?

  What is the voltage tmizj id45cc+ (g:*hfacross a 5.0-W resistor if the current through it is 5.0 A?

  A 4000-W resistor is connected acrog:0jplu4 qzh/ ss 220 V. What current will flow?

  A light bulb operating at 110 V draws 1.40 A of cuh )a; god*-rlwrrent. What is its resistance?h*-g;a dor) lw

  A 12-V battery is connected to a 100-W resisto34 chm */r)l g0.d/ndyjpm:br de+s csr. How many electrons flow through the wi+ 0:)j*m .m eclg ns/d/rys3dhpbdrc4re in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0.40 io;p z6go.)ai onch? (The resistivity of copper )pao .o6;ioz gis $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cs0y3 :lv ov:dv(eicp ,qd1n8 im in diameter and 45 m long, if the , iq8e vvy diov1cd0(3sn:l:presistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resistivitylt oh cc:w/9c) $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wiuke2-,98 qi q,6. oklvqqq(qado*iv lre (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 0.040 ohms. What is its resi *vgdm9 9qf:vustivity?

  Calculate the current through a 10.0-m long 22 gauge (the radius ii60r/5md mhsd ) wqm vr7:3imns 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. (n qd )wmir3 h:i70m6m5 /srvdmThe resistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and of rectangular cross2wbm01hf ijts atzc5 ) t)o+6t-section, 1.0 cm x 2.0 cm. What is the voltage drop altftwo)0csjmbt 2 atiz)+1 65hong 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 wire has a radius of 0.50 mmy;sa )f9ec0r*wula0wf x y)j+ 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 (resistivitg/5- jd0m+z(ke alpvcy $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistdou (m6tnwlt3kp e-fjr;( z*)ance 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 resistivity of platinum is ,,gei:xccqi.8 kr:al1 zsve , $3.9 \times 10^{-3} /^{\circ}C$. 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 r04s1 5cf:b1 yvsltolfesistance of the psf4y:l l o10 vtfb51sclatinum 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 an)r62ioymk , vju1 bfn8 $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is ram t6k(g/pbynsq ttoso r-0+/ lx h9u--nw4v8sted at 1200 W. What current will it draw?

  A 150-W light bulb running on 110 V draws how + t nowo ai h/:bxomj/416biws(ew9 j(much current?

  What is the nominal resistance of a 100-W li d,c*pio:q6b-pg vr 9:,o dw3nnoa)*oigqx (lght bulb designed to be used in a 120-V c o* rnqgdc9wi)i-no pl:6v*o (d,ag :,3b xpqoircuit?

  A toaster is rated 800 W at 120 V. What is the resistance of its heating e+ qdv3f l)upe6lemente )3l pqd6+fuv?

  A 200-W resistor is rvk 7hz+ni1w.ts atm- 7ated at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is r)p.jii bl6 c48mpcw(xh,1eorated at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, t+.xfu e e2wglk p)/d1what current does it draw?

  A lamp uses a 150-W bulb. If it :ckg: i a/bhe*is used at 120 V, what is its resistance?

  A 25-W soldering iron ru dz:0tv **xlunn38mwv ns on 110 V. What is its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 ho1 9 ar kyw0gcxm 88co 7slp4;oleoi73ours, if energy costs oocxsa7;78r8ycep1lmo l3i0gk ow9 4$0.08/kWh?

  How much energy does a 100-W light bulb use in 5tem)7q thl7u8.0 hours?

  A 1500-W heater is connected to a 120-V amo.( lwre 5x u3f/*)faw)vtpydm-o(line for 2.0 hours. How much heat energy3fualaoymr)fpv t) -/e.( xo(w5*d mw is produced?

  A battery is rated at 12 V and 160 A-h. How much (adxis88m(bz energy does the battery store? dzbam(s88 (xi

  How much energy does as u9b9vmv6(y-gxq +e o 25-W soldering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming the power compa:+g es)fy;b,fu+mglu ny charges 10 cents for u ,;+yg)fmbsgfl:+eueach kilowatt-hour of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus moe chfs9vgj7*waw..i9x/nm fvw,+ 3x znitor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to run the computer annuallwsivc fn9+gwa j9ex.mh/ 7vfw,x3.z *y?

  The monthly (30 days) electric bill included the cost of running a central ae91*uc(w(j 0 e colbew: xea4kp*qjo5 fs:yb;ir-conditioning unit for 2.0 hr/day at * o*s:(x;9 cyq4 eww: ju oeeb 5(lpkjfcb1a0e5000 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 cents per kWh?

  The heating element in an electric drier operates on 240 V andt3n f.i94(wjy. icf ii 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 resis.icf t.i49 i(w3 jfinytivity 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 3 .nve1sk8cx3n3is mrthrough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costb-q7vohyv( okntz5 51 s $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 o:i)q;y 1qh5pfa ve tv5f 2.0 hp has 60% efficiency. How much current does it draw from a 120-V lyth5 ):v fq 1viapq5;eine? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac poa * 8d-5yg l1) cr1cudgbdh54in1znrtwer source. What rms current flows through this g ndr1*yahd41)ul bn dg-ci1r z8t5c 5device?

  A 500-W device is connected to a 120-V ac power source. Whatkj9sco.3iulx)kp l .( peak current flows throux9()ikj.s ullpk3 o c.gh this device?

  A 500-W device is connected to a 120-V ac;n)c 9hkza a3)fha2oj power source. What is the peak voltage acr z23nj9oa;f ))khhacaoss this device?

  The diameter of a copper wire is 0.081 inch. The m k-:rd3pnia7xd *a -lyaximum safe current it can carry (in order to prevent fire danger in 3al- dy*kx r:da7-inpbuilding 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 copper is $8.5 \times 10^{22}$.)