A device that produces electricity by transforming chemical energy into el1)qt6 2l ypwasyu,q-tp 6 d6saectrical energy is cal,6ypwa6ytq-p 2uqlst16ad s) led a

  A car battery

  The total amount of charge ru67cc/ov7za that passes through a wire's full cross section at any point per unit of time is referred r/zc7a vo7c6uto as

  The direction of convention curreiwe9589jnd ocp15fqg nt is taken to be the direction that

  A coulomb per second is the s 12g9 tfgps7aet1:,j pcpgz;tame as

  Car batteries are rated in "amp-hours." This is a me *h8l3t 9ja np1ogmsgx(n/+ ieasure of their

  The resistance of a wir8jx,jnlqn.maw)m 4lwxfm( ) ,e is defined as

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

  The resistance of a wie6urfw8,m9.re9e , 47yntywe d+ve eire is

  The resistivity of a wire3e6txutpt* y2q s7:fu depends on

  Which conducting material has the lowest resistivitaro 5,nbkpy:hy2,ssfu*f. -q y value?

  Consider two copper wires. One has twice the length of the other. mi(g/)ldv k)go+m7 yjHow do the resio+kyi7 )g/(vlmdm ) gjstivities of these two wires compare?

  Consider two copper wires. One has twice the length of the*jsf)b h6esj w(b4d2q other. How do the resistances of these two wiress qw f4(*jb2 )6ehdsjb compare?

  Consider two copper wires. One has twice the cross-sectional area of the otm5e y eqq.:x:eher. How do the re 5 .me:eqxyqe:sistances of these two wires compare?

  Consider two copper wires.b-66th l s5 as,xozzh .rfj(yzs8,ta5 One has twice the length and twice the cross-sectional area of the other. How do the resistances of these two wiresyx,6t a -55hzbjrshfs.8otzls (z,a 6 compare?

  The length of a wire is doubled and the rgw oq8lw ;)pbg z8(k).pc+ wxpadius is doubled. By what factor does the resisco.w;g8 +w)8x(pzlwqpk )b pgtance change?

  How much more resistance does a 1.0 cm diameter rod have compared g)jewmj2d1-fl pu1 6zto a 2.0 cm diameter rod of the same length and made of th1g1u 6l2 dfjpm)-ej zwe same material?

  The resistivity of most comqv45pgrf4d w6ac r.d/mon metals

  Negative temperature coefficients of resdes r ()t/lpwum-,ukzd, r .pfwg56) b4ded+qistivity

  What is 1 W equivalent tozm( 4q:;( -bwgi3xkj)xh9b6c dn fu va/vew m2?

  A kilowatt-hour is equivemt+ i8wz3gal 508 vrvalent to

  If the resistance in a constant voltage6afae jeojglx(;8ivd 2k +*5 b circuit is doubled, the power dissipated by that oje;(i fa+xkvb ae5l8g2*d6 jcircuit will

  If the voltage across a circuit of constant resistance is do :s,3x(uwiptloy5 s /xubled, the power dissip5 px t(w3y,ul/sx o:isated by that circuit will

  If the resistance in a circn/fwxa(o*1 bnq:h4ywuit with constant current flowing is doubled, the power dissipated by t :nynf wb w/q*a(o4hx1hat circuit will

  If the current flowing througaq3tf ap -uh/0t5g bk)h a circuit of constant resistance is doubled, the t )a-a/fhu qtbp50 g3kpower dissipated by that circuit will

  During a power demand, the voltage output is wcw/ns9 e67doui;kt2 reduced by 5.0%. By what percentage is the power on a t9 uwc 7wonei;dks/26 resistor affected?

  A current that is sinusoidal with respect to time is referred to asvs3,i 2rpk2tqm ,hj.w

  Consider two copper wires each carrying a current of 3.0 A. On*,itxsnp1k7mrt99q gbyp 6 (se wire has twice the diameter of the other. The ratio of the drift velocity in the smaller diametmpsypr6t9ib9t1, nq7x k(* gs er wire to that in the larger diameter wire is

  Materials in which the resistivity becomes essentially zero at very lowxqm:i)pw 3*uu 0fd i*o temperatures are repuo* :*wquifx0md)i3ferred to as

  What current is flowing if 0.67 C of charge pass a point ibo39f . ) ie-js+repftn 0.30 s?

  A charge of 12 C passe)n.z rjnd8o32muzz )ks through an electroplating apparatus in 2.0 min. What is the an. mz8)n ur j2d)3zokzverage current?

  How much charge must pass by a point in 10 s for the current to be 0.50kq i )ge 7(zl6li*gf.t 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 ikc g y o:m0je 30ri(-db(cjqk3f $4.0 \times 10^{16} \; electrons$ 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 10 min. Wha ph3rb;:a 3kg2 fcyo6udk5gr:c 1c4ok t is the n15d4 oucp6gh kb:3 ;fccr:y3ka2 rogket number of electrons that have passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg of 1;soo,q7e 2** ng z,bbxu gktith.g; jsilver 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 sibx2; z boqjne,,*ski;ggotugh .7 t*1lver? (The silver ions are singly charged, and the atomic weight of silver is 108.)

  What potential difference is required to cause 4.5xe 8xt puil.*/ fflfhh8kx 00paq3mxg9 b b4;00 A to flow through a resistanf 00 pgxft q85 ixlkxxe9b8afb./pm4hh ;l*3uce of 330 W?

  What is the voltage across a 5.0-W resistor if the curren8f5mmk,ojj:byj. .z rt through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What currentgxkzbr /d)3 m5nr8 2xs will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is itsnodz (qrf vzd;;h+b vy;f*51k resistance;v;o f dd y+vbhnr (5f*1kz;qz?

  A 12-V battery is connd(qegynk/ 9p 9ected to a 100-W resistor. How many electrons flow through th y9np(ekd/9g qe wire in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameto ugd4a c8j6(xer 0.40 inch? (The resistivity of coppe86j 4o( cguxdar is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a c3aj pdax-zq 0d-90ajodnv *s2ircular rod 1.0 cm in diameter and 45 m long, if the resistivity is -dz* jad 0o 2vp-aanqdsj930 x$1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resistivity xzgks9t w2u0/ $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wg3t hh(w8xd1wire (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 lo na9cwo(j*ib5ng, measures 0.040 ohms. What is its resistivity?

  Calculate the current s 9ebn b;w43 :lucd7nxthrough a 10.0-m long 22 gauge (the radius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. (The rese;3 n:wlxd4cs bub9n7istivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and of rectangular cross-section, 1.0 7x+ f-q lkj 0,fcyocf-cm x 2.0 cm. What is the vok -cx,f-07jo l+qcffyltage drop along 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 hm s9dxba(6yt23 kwq.yas 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 wire (resistivi4l5,6mdv;*blu gywj; j1o t j1qboh/ tty $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor haa:az7in 1s ) .meb nb7/qo:taxs 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 coefficirqplwb. 1 ;*h qifs(mzd1g96ctu0hw0 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 used to determine the melting point of indiu0ad w m2lof3//bk af2hm. The resistance of a al3/ 0d2w2mhf /fbkothe 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 througy(rrc e0ca+v 9p0*za nh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1):r zc 4o4+z96p xv,nrh zyalu200 W. What current will it draw?

  A 150-W light bulb running 6c1d-ykxmr h*w j31,hix7lni on 110 V draws how much current?

  What is the nominal resistance of a 100-W light buf,z( ::yut/p4cxtrplzz g/;g lb designed to be used in a 120-V c l/(g; :czgzrtux4yp, tf:/pzircuit?

  A toaster is rated 800 W at 120 V. What is the resistance 2j o0.c3ov,upcdzyc xvz7r 19 of its heating elementvc,vo02p.j ozdc3 y7zx1 rc9u?

  A 200-W resistor is rated ae4g fixf+msw uhj 930+t $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ratedm0k..lca0f h i:exj0 :n:fzkd at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W (( rt31 f9pfs-h m ov;ckvj9nnbulb. If it is used at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V9nhg: zyr-/ ft, what is its resistance?

  A 25-W soldering iron runs o2)hv yhe jjz+t/j k*-ek*5wbgn e: -spn 110 V. What is its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hpxj/zme-k j n) tqx+ r24*iv8lours, if energy costsiv)kl8tx j 4z*+ ep/mj 2r-nqx $0.08/kWh?

  How much energy does a 100-W light komx89)5hi rf bulb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 z+qv :.5uofee c9qhx0 4xtkz;hours. How much heat energqqzxe: 0t 9fchz v+u.xoek5 4;y is produced?

  A battery is rated at 12 V and 160 A-h. How much energy dlo/mnz: k ;wd-oes the battery store? ;:nk/l zwomd-

  How much energy does a 25-W solderi,jd 2sqaz9f7cng iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 houwq *mth*zg*) r8l( e4dwaah7crs per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate)*m7w*elzh8 ataqw* gd(4 hcr the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0 h. 3k2,mrhyc*e, e vr-3ndqq rqours per day. If electricity cr-q 2 r* rm,nvkq,ech33 qyde.osts 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 central ai()ees eijz; dfw 6:*qoq)d6xbr-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 centse: (dio ))wzfj;sex 6qqe b*6d per kWh?

  The heating element in an electric drier operates on 240 V and generaqyg- /vwbd ;k6q; 97enn4 .g sr*bmllftes 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 resistivity of the wire will depend on its temperature.) Whaql ed-7; gng./4*sfwkrn;b69l bmy qv t effect will the repair have on the power dissipated in the heating element?

  14 A of current flows thxih(pmk z,*, a e r/:-vsemi ;h:ts1isrough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs vlzpnre 9g(t 5),ck0 t(lu5gt $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 th xvg/ 2c.;x,qc jmyik2e rate of 2.0 hp has 60% efficiency. How much current does it draw from a 1qx.j mkicy/,x2v;c 2g20-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-m:cm23b0ka3t-sv;ma dp8m whV ac power source. What rms current flows through thm 0h;amc tmp m38s2vbw3k-ad:is device?

  A 500-W device is connected to a 120-V ac power so66p hb*ccov ;rurce. What peak current flows t*r6bc6 ;cphvohrough this device?

  A 500-W device is connected to a 120-V ac power source. What i)gloxee6 )g;m n/dji sv ;6j5movrz;7 s the peak voltage across this devic 6v;j)ix ; z)r6mgjs75loe vg eon;/mde?

  The diameter of a copper wire is 0.081 inch. The maximum safe current i86-g q ih0jcact can carry (in ordera 8-hg0 6icjcq 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 copper is $8.5 \times 10^{22}$.)