A device that produces electricity by transforming chemical energvcj5rd08:4de2dvbe .xysz 1ty into electrical energy is cabyv z05xcj d8ere1.2:4 dd tsvlled a

  A car battery

  The total amount of charge that passes through a wire's f 5addx. tq cfmj0q8*b2mkm(,5vgaysm f3) -rnull cross section at any .8darq*m0kxmq b ( yg sjn) 5atf,-vdcmf5m32point per unit of time is referred to as

  The direction of convention current is taken to be th(6hc,f)jl ue *4ea iqte direction that

  A coulomb per second is thes8m dn9dw :o d5 oj6dm0z0(3 cwmrs1ei same as

  Car batteries are rated in "amp-yw +6/bj*;z8.cnf.lgp tfyom-6ceyu hours." This is a measure of their

  The resistance of a wire is defined mn7og:f,j+,2.5l gwwlx )3ig8o rih,rqglw uas

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

  The resistance of a wire i/ ozg,ll zz*u.w/g o*hs

  The resistivity of a wire dependsenyxvftlb)( 3, -a h4p on

  Which conducting material has the lowest resistivo)ehq/z u+:somh3v6cpm ) qo3 ity value?

  Consider two copper wires. One has twiceo (aoyy7d-ul , the length of the other. How do the resis ,7au(l-y oydotivities of these two wires compare?

  Consider two copper wires. One has twic jytk8df3d)(qb qgtgs9h xy t+d04u54 e the length of the other. How do the resistances of these two wi kyd+yg9utdg48q)qh bs 0fxt(j 5dt4 3res compare?

  Consider two copper wires. One has twice the cross-sectional area of the o-9u(fr qeud tzzu7*c.x,zlqcq .*s) zther. How do the resistances of these two wires. urze, flu()uc q sqz. t-q9*x7dczz* compare?

  Consider two copper wires. One has twice the length and twice the cross-seoi(48efn9 pn actional area of the other. How do the resistances of these two wires compea4n8 9npi of(are?

  The length of a wire is doubled and the radius is -vvujcw r7; xvp1gg41doubled. By what factor does tcwvp1-7r 4gvx gu;v j1he resistance change?

  How much more resistance does a 1.0 cm diameter rod have comparebr fio z j.f;j6+.g4q2xdvso4 d to a 2.0 cm diameter rod ofrgzq 4ofo.xvij 4 6.+sf2db;j the same length and made of the same material?

  The resistivity of mo1h*9bvo5ly4 j nxuae0bwr 5+ost common metals

  Negative temperature co9d e dd2/w-oys0 l;iaoefficients of resistivity

  What is 1 W equivalent toc;(9 f)b egb -0ti, tkcimr/6:ixzkf w?

  A kilowatt-hour is equivalent ti gl32hjdt3k7o

  If the resistance in a c4 v 8:odv.vd7h rfd6 tqz)jy7jonstant voltage circuit is doubled, the power dissipated by tharzj ty q7vov)7.f j4v: 8h6dddt circuit will

  If the voltage across a circuit of constant resistance is doubled, the pohpr; nne3t v,av+wl.+wer dissip vhena+ .w +nprlt,;v3ated by that circuit will

  If the resistance in a circuit with couhy7 puzo*zw) 6 1azao 12zvh5nstant current flowing is doubled, the power dissipated by that circuitz1o )a7u1 aoh52whz*zz6vuy p will

  If the current flowing through a circuit of constant resistance is do94c psl8 y(lmazq,ko/ otm1k2ubled, the power1ayp/,l lk( 48z9tcom2oks q m dissipated by that circuit will

  During a power demand, the voltage output is reduced by4taqxvp-z) ; y 5.0%. By what percentage is theq-vt4;ax y)pz power on a resistor affected?

  A current that is sinusoidal with respi pkp:** n/afqq;7jeaect to time is referred to as

  Consider two copper wires each carrying a current oz;/ dre3zvvd9 f 3.0 A. One wire has twice the diameter of the other. The ratio of thv ;ze/3dzdr9ve drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomes essentially ze4a+ay bbf5-tcky7k: nro at very low temperatures ar5:+yctfb4by-7k a an ke referred to as

  What current is flowing if 0.67 C of charge 0d a;8j8iy2bcuw+.a6gu euxr pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus in 2.4,w1.stxm oaslg pa.vra 2mr ) 6u3td*0 min. What is the average )x 1 * 4mu. ga,ra2av6m3tow ltrsp.dscurrent?

  How much charge must pass by a point in 10 s for the current to be 0.y/7 mdeo*b1g;1 scccd50 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 lrz 3cz5iynmdzmen+a ta/ h3d0 ;58(v$4.0 \times 10^{16} \; electrons$ 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 1xci ,mcfn04:f0 min. What is the n0f:n x4fc m,ciet number of electrons that have passed through the coffee maker?

  In an electroplating prol1f2+g37v kc yqg r.bhcess, it 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 much silver? (The silver ions are sin q3vh+g1g2kr. lc b7yfgly charged, and the atomic weight of silver is 108.)

  What potential difference is required to cause 4.00 A to flow through a 6j+1q*m yiy k7+;+lkgju ix;kojno6fresistance ofm*joi;k16kk 7o lq;y++ j+ ixnu 6jfgy 330 W?

  What is the voltage acr 7kti1sohk3-p1 gc;j z,.cjla0k+rrcoss a 5.0-W resistor if the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What currend .kdoc1(n xa*t will flow?

  A light bulb operating at 11r*(- tpolwhr*uyo0 * k0 V draws 1.40 A of current. What is its resistance0 wr*p rut*yol*o(- kh?

  A 12-V battery is co/pd, v,gyj/(klg ng*y nnected to a 100-W resistor. How many electrons flow through gg ,yp njlv*/(dg /y,kthe wire in
1.0 min?

  What is the resistance of 1.0 m copper wire of diam.;i ccpoznhe, l6yk fk/9wv 0;eter 0.40 inch? (The resistivity ofe/,ov h; lwp;y. i9cz0kkcf6 n 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 m longoak.wy rt:x0-.t: w in, if the resi:. ttia:wx0owry-kn . stivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resism 7c14miq *+pjbwwaa 0tivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper r(g l,h(sjnvez3 z1d60dr+rm wire (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+zi3cb+ vlwo9 ohms. What is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge .5bcyctee;wwet15; hv+6 fdv(f alk +(the radius is 0.321 mm) nichrome wire if it + bw+(efek6cy.v ed1f;v5tch wlta 5 ;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 and of rectangulart-/* zqglxva31lbbp1 cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carriebabl qt vlzpx31/g*1-s 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 mm ar md8rtv 35/ncnd 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 g:t uifi-b(y e/bxf-l cv1al7lz(y 77(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 y68yvqi6bfox y0 9 bw)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-bax6 wn d 1y(fv2lzd5 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 use*;jlvenqy4 7w; jkhlq,y ,e+id to determine the melting point of indium. The resistance of thqyy,7lkj v; i eq4h*w,elnj;+ e 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 th0ovbdiq . kox3xdm;,ezg h6 a k:ue.48rough an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current will it dr-fpyb1vvx65l *ui 93ckgz4xs aw?

  A 150-W light bulb running on 110 V draws hygh/opb7quz /. p3/(u ooj; hk jtwe8/ow much current?

  What is the nominal resistance of a 100-W light bulbepq opwq3 6a w6y zq-7otk//wu n68pc8 designed to be used in a 120-V 6cqq wk/78tqpow 3wap6en/u-o p zy86circuit?

  A toaster is rated 800 W at 120 V. What is t +qypba c-bx 7r/mx/2ch.3g zehe resistance of its heating elemen +e7xb 3q h2c-ga.bxp/mryzc/ t?

  A 200-W resistor is ratedr;p/j mq91*+ jcecg,qh0xk ue at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ratedvu9w,rqzi *4(( 2w h;cqxavyinpa 1o( at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If itq+r7, mb7qt0glu(sn n2atfejc;w21 k is used at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it is us8)f upqu+vaq x ne84 uz/pkut3of-2 m6ed at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What wch9 a lph/es9i(q4)m1j1fdhis its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours, if en n:9xmzi n8; ctfipw(2ergy coi(c9;inmt8w pf x:nz2sts $0.08/kWh?

  How much energy does a 100-W light bg(paf* igi4rzh), m -uulb use in 8.0 hours?

  A 1500-W heater is conx6use dh* +fy0nected to a 120-V line for 2.0 hours. How much heat energy is produced?ds*+f h0 uy6ex

  A battery is rated at 12 V and 160 A-h. How much energy doeih g.s6 qb7z1cs the battery store?1 qc6i.bszh7 g

  How much energy does a 23p,pyd5rmbl/uexb g r(jq2u+o -/ k8 y5-W soldering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming the power bk ln.rw btq,:tin3;2 company charges 10 cents for each kilowatt-hour of electricity used, estimate the an:bb2q tnwn.t,i 3l;krnual cost to operate the bulb.

  A 400-W computer (computer +,n(j:ok cufjplus monitor) is turned on 8.0 hours per day. If electricity cosjn,k(f:j u c+ots 10 cents per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electric bill included the cost of running a centralgl:-ijf b d28v 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 e28-f bdj: vliglectricity costs 8.0 cents per kWh?

  The heating element in an electric drier operat)tow :j*be3g lgj) vp(es on 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 Nichrome wire by 10%. (Assume the temperature is unchpe) l vg *tg(boj)w:j3anged. 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 thro 8,myem;r-0cww;ld vmugh $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costou50/-rjb5d lq v. )qg zlplt5s $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. Hoz2hwdc m-1h- ww much current does it draw from a1c wm hh--zdw2 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac pj tmr) g1x7:pmower source. What rms current flows :j)mp gtr x7m1through this device?

  A 500-W device is connected to a 120-V ac power source. What pea8eito9-nj9l99dxo j6 ab7kb gk current flows through this devi 7xaboe-kjn b98ti 9jg ol96d9ce?

  A 500-W device is connected to a 120-V ac power source. What i*a rsibr lz5i2eyx )t(: o,fd9s the peak voltage across this device?yao9i,2xd t:5l)rbs* feriz (

  The diameter of a copperuw;3 b,*/ 0(c5e ra)nbvcn6lhty*uaoh rk0n i wire is 0.081 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 e(uonb03, l5r /krt bn0;nay*au)vh *6 icwh ccarriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)