A device that produces electricity by transfmc am9/ t:9i;7 g( fyhw(rgtehorming chemical energy into electrical energy is cal9gr 7hh:cityf m m/gwt9e;((aled a

  A car battery

  The total amount of 8acftq,eqi3 oj:c,, q charge that passes through a wire's full cross section at any point per unit , f,qao:c8q3ji, eqctof time is referred to as

  The direction of convention current is taken to be t2 s63 (bcybpbyhe direction that

  A coulomb per second n mg wnn2j/oulwk ;2eds *8o:;is the same as

  Car batteries are rated in "amp-hours." This is a measure of tkz4 u5n. mbx4nheir

  The resistance of a wire is defined,cd//7lpf/ zlvr v86o owsb(u as

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

  The resistance of a wire pp5tyz5s hg99is

  The resistivity of a wire depends o 5una-pn-nvt+ n

  Which conducting material has the jla6j (a:h-me lowest resistivity value?

  Consider two copper wires. One has twice the length of the j2:xrjiuqc7y. 0c)m2hadb3;/ rq, vi wmxi4t other. How do the resistivities of tma: wqj2xbq;iyricu/vx j7 cd, .0 ri3mh 4)t2hese two wires compare?

  Consider two copper wires. ,*vl h-zaophfr(+x - w+tfr*zOne has twice the length of the other. How do the resistances w-r x,rtz*o(pf+vz-f lhh +a* of these two wires compare?

  Consider two copper wires. One has twice the cross-sectiona0d2 v8t+y y3aa y)nmpoexb 7.fl area of the other. How do the resistances of these two wires co axd.t)8yfn7 oyv+3py ebm0 a2mpare?

  Consider two copper wiravbtkaz ldz19 );*a y+es. One has twice the length and twice the cross-sectional area of the other. How do the resi9aa+zb*z dytla1 );kv stances of these two wires compare?

  The length of a wire is doubyv a4 ,po gium-s/ad/4led and the radius is doubled. By what factor does the resistan/ om gd,uy4s4ia -pva/ce change?

  How much more resistance does a 1.0 cm diameter rod have compol; 2w:. tuw+jvncni /ared to a 2.0 cm diameter rod of the same length and made of the same materwuitv:o2w ; .nc/ljn+ial?

  The resistivity of most co1ccb8.6k7duwa a wnfe,h3dr. mmon metals

  Negative temperature coeffi70*ug qa9zs *)gwlnhacients of resistivity

  What is 1 W equivalent toat gv meiy .x5:n8j36we*n95dpg g7ki?

  A kilowatt-hour is equiv;rr )g9n.b cfxalent to

  If the resistance in a constant voltage circuit is doubled, th hu u0id-mei3j s9*1sze power dissipated by tha09 hjzu i1sseumdi3*-t circuit will

  If the voltage across a circuit of constant resistance is doubled, the powerb;2st.asmwhpz3m 48 )9dzmmj bnfr(y (z)k z 3 dissipated by that cir;y3.(dwm8mjs za ()z 9kbs nzzmb 4hpt 3)r2mfcuit will

  If the resistance in a njr*v(s;dp5 e h0o4fa0z/q4xm mj+spcircuit with constant current flowing is doubled, the power dissipa n0hvja;sq /0*res5opm+xz4 (mj4fpdted by that circuit will

  If the current flowing through alhlr(;s 7oan88vrfdmgu:7h7 circuit of constant resistance is doubled, the power dissipated by thatfranlm8d ;v7 :(oug78 lhsr7h circuit will

  During a power demand, the voltage output is reduced by 5.0%. By wjy1 pf.hb;aw9gc/:p hhat percentage is the pow hbp p/ .:y;jagh9c1wfer on a resistor affected?

  A current that is sinusoidal with respeccfu5bs n34 x.xt to time is referred to as

  Consider two copper wires each carrying a current of mn;5ef0 nfz7 j3.0 A. One wire has twice the diameter of the other. The ratioj f;n75 enzf0m of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomestq:ll6nhe6raiv;vu .5+ t4j wvxn *4o essentially zero at very low temperatures are referred n: tvwj.4 hnrat 46 *5lxqvuv;ei lo+6to as

  What current is flowing if eokzwv.rjxa9g) 16o: 0.67 C of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus in 2.0 min. s cb jph:*g;-*5fa htptgnka1 i967 oj What is the average ch7po9 st: 561gtkbah -; anp gf*ijj*current?

  How much charge must pass by a point in 10 s for tu*c.ic gg tsm39i7nc1he 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 eek .ibv7nm ; 4jy7w4q$4.0 \times 10^{16} \; electrons$ 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 hy )6xzxccnx-5 -ll hrg87p8 ccurrent, has been left on for 10 min. What is the net number of electrons that have passed through lr7n c 85yhcx 86h )xcxp-z-glthe coffee maker?

  In an electroplating process, it is desired to deposit 40 mg of silver on a metpe*r u a/8hd7-on2ss(du 4:t kng .ibtal part by using a current of 2.0 A. How long mndnskuhui/* t28e7 bt.-4g sd:o(rpa ust 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 fvdarq.+ y( o: ph u;p38tcymr(low through a resistan r( +oa8;pyqvum:yd3 chtp.r(ce of 330 W?

  What is the voltage across a 5.0-W resistor if t rum1 n mi *hxy4lzfej..wz :.7eic3xmpbj((9he current through it is 5.0 A?

  A 4000-W resistor is conne.3n kauu) ,jq9 (rgtrgeu y0n-cted across 220 V. What current will flow?

  A light bulb operating tc;-, yyjlgo+d) q7)wqtvqr g/y n21v/t4jqy at 110 V draws 1.40 A of current. What is its resistancegq l)/ voj/q7dyjnvw)q1tqgy2cyt ; tr,y-4 +?

  A 12-V battery is connected to a 100-W resistor. How many electrovllh( jcuft*1 /uyv 03ns flow through the c u*0v lft1/hjv( 3luywire in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameteew +dri8s0okad w*6j8ry r;5y pb7e8er 0.40 inch? (The resistivity oer r;krs +5 8y oe6078w*8ep wbydajdif copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameter and 45 mqfzm2j v1ra.5j)hrz3l pt)g9 long, if the resjg2mzatr) fp)9z vql.5j13hr istivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resis,x7kcefd *n )ftivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (resis4nwjm y0j8mv0 tivity $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 resw4l5rvbu;d ,i -jx6 jxistivity?

  Calculate the current through a 10.0-m long 22 gauge (the radius is 0.321 mm) em 79o4bw drh5k+pq ld(jb/h) nichrome wire if it is connecte(9/p4 lrhhb+5)7w dojkbedqmd 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 and of r o842ujad k eg0md;y3rectangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when ity4gd3 0keod r mu8ja2; 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 of0( .xlv :ladv,t,sbfpcrz 4 /e 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 wire8-isuv r-po qn 0q8y daex+ f:4fyd2d4 (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 resistance ofwu 817/0ej nfqiau7xl $18 \Omega$ 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 2m k-.wxjm q1qplatinum 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 meltirx 7javer;g:9kc5 vf+ng point of indium. The resistance of the platinum wire+gx r kea9:vvrf;c57j 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 logy:1;vw 6-wd+r.3oio pvqs$10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current will it d1ljnps oy9:-58:vhdn-swn hrraw?

  A 150-W light bulb rolx3vp 9 7-hv o(7gil 4k+bwzhunning on 110 V draws how much current?

  What is the nominal resistaod1mjz.hq;k- nce of a 100-W light bulb designed to be used in a 120-V ci-kmq ;hod 1.zjrcuit?

  A toaster is rated 800 W at 120 V. What is th o-i+chs*tbwi.2( wc ae resistance of its heating element?+- ac*twch2isw.(ob i

  A 200-W resistor is rated at n1j.f+ ih(jhx,pe jqb:6 yle; $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated agnz .b -;:z2+hchnu1 c( fgxcat $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If icum-sj5. -gsp 0qf/ci t is used at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, wa5x3jt fgm 1u+hat is its resistance?

  A 25-W soldering ironzuzq4 gn1ez 89 runs on 110 V. What is its resistance?

  How much does it cost to operate a 252ihwv: )u9izn7aomj60 gy+e i-W soldering iron for 8.0 hours, if energy cost 6nz+9yi72hmegiu0:) i javow s $0.08/kWh?

  How much energy does a 100-W light bulb use in 8.0 hourn.bp/ flg67(yyg tdm .s?

  A 1500-W heater is connected to a 120-V line fordr*34ma mwp4 )hueij m zt/dl95)hq35hf ap /z 2.0 hours. How much heat energy is prm z9)e3lha ump4qat )z5 h3*/pijddfwh m54r/oduced?

  A battery is rated at 12 V and 160m*u 7a5 yo5g )+p-zb1v lipgpz A-h. How much energy does the battery store?vig+o7lm 5ppbua z5 z 1*yp)-g

  How much energy does a 25-W so+zymzo7 a5ny4 ldering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hounik9f60f p7+8rxezc l rs per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate the 68lzknxpef 790 +i rcfbulb.

  A 400-W computer (computer plus monitor) is turned on 8.0 ahq ;dm0nbc.2 hours per day. If electricity costs 10 cents per kWh, how much does q hc;.2b0 ndamit cost to run the computer annually?

  The monthly (30 days) elei58wy 8p5lq vcctric 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 monthly electric bill if electricity costs 8.0 cent p88vcqiy55l ws per kWh?

  The heating element in an electric drier operates o)1 ssh3ra/vx,qx 5 n0ptdy *ann 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 Nichrsxn5h /10 *v)sdpnay,ra tq3xome 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 throughuf;sl1js hz 7vk08il- $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costsf) 2l( ,6 m/jqj. ujqb*evmbxo $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% efficiency. How mua;re ljji x2wxi/kp)(;* sy85u hoi-q ch current does it draw from a 120-V line?iuekxj/l8pirq)-o is* hx ;w y; 25(ja ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 12cr t0/ox lng-99 meryf83, cil0-V ac power source. What rms current flows through this dtrnl 9 -r8fgc9lyc3, e mxo0i/evice?

  A 500-W device is connected to a 120-V ac power y 90cbd -+vmscsource. What peak current flows ty-vbm9+0c sd chrough this device?

  A 500-W device is connected to a 120-V ac power source. What is the peak voltag)9c -g ieggdlwthx(n 232n* ,nxmzl/be acrogbwx*nh(t em -2di/2c nzglg, )xl3n 9ss this device?

  The diameter of a copper wire is 0.081 inch. Tp v9)yz gwq(;mhe 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 centimete;(qp g)v9m zwyr of copper is $8.5 \times 10^{22}$.)