A device that produces electr ovw. k. -vv8jqqp+ 1-v(ovrxk xn()dfazv,y/ icity by transforming chemical energy into electrical energy dqz vxx--k/).avyvoj f.no pv (w q(1k+r v,8vis called a

  A car battery

  The total amount of charge that passes z//mk gy,. gw*0jw1n;j okkuz through a wire's full cross section at any point per unit of time is referred tojm/;ky k 1gjgz 0 kwuon/,w*z. as

  The direction of convention currj(no n,)r;fw st8e g9bent is taken to be the direction that

  A coulomb per secondt2szlu/;r *yf is the same as

  Car batteries are rated in "amp-hours." This is a mtwv)i4c. 3y boeasure of their

  The resistance of a u*drr gj(6 1 asq/e9lkwire is defined as

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

  The resistance of a ujq9h e)jq+q8wire is

  The resistivity of a wire depends on ,tz277-rmyuppcc5jd

  Which conducting material has the loh fkvj-os0+0j west resistivity value?

  Consider two copper wires. One has twice theqjelz2vn..b31gb . uc length of the other. How do the resistivities of these t. 3g.cnu2v 1j. lzqbbewo wires compare?

  Consider two copper wires. One has twice the length wshm*)3 rrj-lovkngt: ur:0+ of the other. How do the resistances of these two wires com3t0wr r-*jhm+ u slor: kng)v:pare?

  Consider two copper wires. Of(fehu7 euf 27ne has twice the cross-sectional area of the other. 7u(e7 h ffue2fHow do the resistances of these two wires compare?

  Consider two copper wi *o.)e g 6z*ek bi4qp9pycoya-res. One has twice the length and twice the cross-sectional area of the other. How do the resistances.ei p4cy* -)bkpe6gozo*q9a y of these two wires compare?

  The length of a wire is doubled and the radius is doubled. By what facto.eopc4l* mp)5 fk.gikr does tp f*gk.ei) 5p4o.cmkl he resistance change?

  How much more resistance does a 1.0 cm diameter rod have c/p8jmee 7 6sl .wsjw:compared to a 2.0 cm diameter rod of the same length and made of the same s.6wlsew/8 mp7:cj ej material?

  The resistivity of most co yc-9l4 .w/j)papbydv mmon metals

  Negative temperature coefficients of resistiv6u5szkhrks:e , cz7/lwt 7gy9ity

  What is 1 W equivalecb+ wu+9 ult8u:h8doi nt to?

  A kilowatt-hour is equivalent tofo;s3hw ::kq6 9bqp.e(xwdt iucln8 3

  If the resistance in a constant voltage .un.ngd *ix*g circuit is doubled, the power dissipated by that circuitn*.g i.x*nu gd will

  If the voltage across a circuit 3wog5k3b h5prr0z 1c yof constant resistance is doubled, the power dissipated by that circuit kbwhp3 1yc0org53r 5z will

  If the resistance in a circuit with constant cu,eh5hd l m8pkmyb2-veek 2n*tjp917s rrent flowing is doubled, the power dissipated by thkm-592*1m dp8hy len2thp7,jsve ke bat circuit will

  If the current flowing to 8viq,mn g/6 wns6,.kxknt .yhrough a circuit of constant resistance is doubled, the power dissipated by that circuit wil.m g,y. qvnk6tnxknwsi/o, 86 l

  During a power demand, the voltage output is reduced by 5.0ntprl:+u,mms y14g/ f7ay6l 7vwoyu7%. By what percentage is the power onyoam7 un r/4+s ptmgyv77yu16f w:l,l a resistor affected?

  A current that is sinustc2wc0l k0 u)soidal with respect to time is referred to as

  Consider two copper wires each carrying a current of 3.0 A. Oz3)y(qbjr;v :* bgm ntne wire has twice the diameter of the other. The ratio of the drift velocity in the smaller diameter wire to that in the larj;(ntgvmzb)qr y *b:3 ger diameter wire is

  Materials in which the resistivity becoew 4 5eue/1q7hzz 6jfbmes essentially zero at very low temperatures are referred to a5/qfe4j7zz1eu h6b ew s

  What current is flowing if 0m; kk8c,oggd;.67 C of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus in 2.0 min. pvyf7 f5zs);d What is thzyf7;vdf )5ps e average current?

  How much charge must pass by a point in 10 s fo;u:yl- zp wu- i7ideu1p(wl(pr 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 flowi1j6 h t7ht(r6 fpv9l6i*ryv eqng 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.3d+wged )ms.pn9rxa left on for 10 min. What.p+ x3es)w a.ddm ng9r is the net number of electrons that have passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg of silv-wwpa ho /ehx(.a +q(j/jb5r aer 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 charged, and the atomic weight of silver a+q. /hxphwj /5aab e(jr w(o-is 108.)

  What potential difference is requiregy1.yv17pvtzq-.kwgzm3 , f:s3nc czd to cause 4.00 A to flow through a resistance:p. y z g7ykw-tc.cgv1v3q1z ,fzs3nm of 330 W?

  What is the voltage acro/il m:rs 6mjs ;mv z0r2yrwbn/4w(h0lss a 5.0-W resistor if the current through it is 5.0 A?

  A 4000-W resistor is con( 9 x5wmowjzzw:,t+otnected across 220 V. What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. 3 dtvq9+vl,a +i9sfxmWhat is its resistance?f aq++99d3sxvtm lvi,

  A 12-V battery is connected1uht6sbuto vus0/8 cbjeq60 . to a 100-W resistor. How many electrons flow through the wire in/h.teb1 sq8j uu6 t0b0co 6vsu
1.0 min?

  What is the resistance of 1.0 m copperz72(co;dvr 0fh7:iv p9 vlnpp wire of diameter 0.40 inch? (The resistivity of copper isi fv;pprz2n0 d7h:oclvp79(v $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameter and:b2lom nc+tca cta7fzj9; .0g 45 m long, if the resistivict;.0:lz79+na mccftabo2j g ty is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (rrel2)8dy aa-zub1t; k esistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (resistivctcyke8 5h -g4ity $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 resistivitq1e3 wf; bll;qy?

  Calculate the current through a 10.0-m long 22 gauge (the radius is 0.321 mm) niynt ns93xow.:chrome wiren9xo ywn.:st3 if it is connected to a 12.0-V battery. (The resistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long an- p+tasnt1(clx b;b4ed of rectangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carries 4000 xbae1;pn (ts4 t cl+-bA? (The resistivity of copper is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichroi/i o7imjvv(w4s;k) bme 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 :fvn1; n0brfh 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 a resistance4a,of bqyj.c ne93 *ar 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 coeffici /8ixs..wygdbvsdg 9vx+:0u q ent 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 usx (vngm5u *qfg ax/koe7+e 9y7ed to determine the melting point of indium. The resistance u 7 7qnxk eamgf9x+y5e/*(o vgof the platinum 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 through2r1th0o ys 1d*d+ki vp,3.bimr2kmss an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What 1s gexbza/e4it p,)eqv )57jk current will it draw?

  A 150-W light bulb running ,b578. tn k:hkea fyckon 110 V draws how much current?

  What is the nominal resistance of a 100t an44s(mvfu8 -W light bulb designed to be used in a 120-V circu4u t4 8(nafvsmit?

  A toaster is rated 800 W at 120m7,j3epl 94 atylkao - V. What is the resistance of its heating elemen 4oajlt,lp39am e-yk 7t?

  A 200-W resistor is rated * (no0;.ydp6k kfg , ypw crfb);hpuh(at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is /rmd 2f k7l(ud ao6oy+rated at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what cuh 1t gw1tf+u.zrrent does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is its resis s1e b(mi/6oc m97srlltance?

  A 25-W soldering iron runs on 110 V. What is its resistana9m; b x9bsbi.yl )sd(ce?

  How much does it cost to operate/eswqmw2d5 p3hc n.2u2/ui2n9ptl le a 25-W soldering iron for 8.0 hours, if energy costs wipm22/nluq2.3 /su9we tnh25dlepc $0.08/kWh?

  How much energy does a 100-W light bu8am.5b-fa iyob 8vn-e(nu/i plb use in 8.0 hours?

  A 1500-W heater is connectbro,rs3r akv5e0 q6zg ift6/(ed to a 120-V line for 2.0 hours. How much heat energy /ts rz0r(5ikrfq, b6ao ve36gis produced?

  A battery is rated at 12 V and 160 A-h. How much energy doe ff(5aqk,tc5i9 s *k3jqfbh +ps the battery store?phakfqsfkbc 3i f ,+( 5q5t*j9

  How much energy does a 25-W soldering iron use in 8.0 .5wr3 d scppx+04hwqzhours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming the powej1 nzqirvp3 v:wb( 0n(r company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate 1vnrn0j3iz pw(:(q bvthe bulb.

  A 400-W computer (computer plus mo ei 8ltp b(z59p -tvage-nn/h6yx2r,fnitor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it ctf6ga/-v xyp-p(e,liz bet9r8n5 hn2ost to run the computer annually?

  The monthly (30 days) electric bill included 5wd 94 iwnmo(t)khfc; fj0jl /the cost of running a central air-conditioning unit for 2.0 hr/day at 5000 W, and a series connection ;9f wjfhjl() k dc0ni ot45/wmof 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 driv8k( jh* seqd,efg w15pk9 e-mer operates on 240 V and generates heat at the rate of 2.1 kW. The heatingd8wp*hj q-e,se9fvgkm5(1 k e 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 t,x3ebz1:rui:odaj4vt n o b15hrough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs vj hy j)5z8fw-/q qh*y$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 jvzr6 s.dtlw2v kyb01ln,6 6iof 2.0 hp has 60% efficiency. How much current does stk l nlv62.66,v wjbyrzd10iit draw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac p vgu56,w .6zmk t1acgqower source. What rms current flows through this d1akv,6m.6ggztwu5qc evice?

  A 500-W device is connected to a 120-V ac power source. What peak c)jg+wtnaewqu(j 6 .b4urrent flows through this bu6e).gj4n jwt+q w(a device?

  A 500-W device is connected to*1zuwgr(v1 rmba*f 8y a 120-V ac power source. What is the peak voltage across this *r( z81aurg mf1wb*vydevice?

  The diameter of a copper wire is ;p d;hh,* cosc0.081 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 centimeters,o ;ch;ch* pd of copper is $8.5 \times 10^{22}$.)