A device that produces electricit xbjka+ar9-gn)2 qq;dy by transforming chemical energy into electrical energy bqg+-; n kjx9r)q2daa is called a

  A car battery

  The total amount of chargf * 3heuqf8-rls1k*rm e that passes through a wire's full cross section at any point pfrqs *e3l-k18*mfur her unit of time is referred to as

  The direction of convention current is-g-z bsk 4df;rzd f(n5uogr9 4 taken to be the direction that

  A coulomb per second is the samn9e/0m2bgw z ve as

  Car batteries are rated l8pv7: xyq6bh in "amp-hours." This is a measure of their

  The resistance of a wire is du-1-mb gw1f uwefined as

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

  The resistance of a wire; t y ;zcbdpq/f,nk-.u.s9rhx is

  The resistivity of a wire depencd)zdew8fh3 ai3 k i/wmu(7 8ods on

  Which conducting material has the lowest resistivitygqp-u m j)o+s0 value?

  Consider two copper wires. One has twice the len6bj9w*pb) aufgth of the other. How do the resistivituj a9b*)fw b6pies of these two wires compare?

  Consider two copper wires. One has twice the lengthb nf) 48ddygxr(nby1/ of the other. How do the resistances of these two wires compare? yb( d8dnfr/gn41bx)y

  Consider two copper wires. Oned6qh +fu,jtg40 1rvtpt*k/ *hh 4rcn k has twice the cross-sectional area of the other. How do the resistances of these two wires co/1ku4*h0r* 4fkc hg tpjr h6v,tnqtd+mpare?

  Consider two copper wires. One has twh2hhib03 v*cvix :g-f5g/i vvice the length and twice the cross-sectional area of the other.:2-g v h* vh/hfvic5v03gx iib How do the resistances of these two wires compare?

  The length of a wire is doubled and the radius is doubled. Bhcj9 6y)bods -q py-f:)fetc8y what factor does the resistance change?9:fd-sec-p f) bhqtycyo) 8j6

  How much more resistance does a 1.0 cm diameter rod3z40t jjyo zq0gfb,c7 have compared to a 2.0 cm diameter ro j3o0tybfgz074qz,c j d of the same length and made of the same material?

  The resistivity of most common mesys8.zo ilp :+tals

  Negative temperature coefficient/agm;scwg* . ff7 9.6du vjwtxs of resistivity

  What is 1 W equivalengt iz.liey35 lz,e) 6zt to?

  A kilowatt-hour is equivu1 pcg)idj(oj3k u.9f alent to

  If the resistance in a constant voltage circuit is doublanpju/ 1nj(0 gz+-fvg ri- ci9ed, the power dissipated by that circuit willjn1(/9ggc a pn--f +zrvu0iji

  If the voltage across a circuit of constant re bhc7r6 *oypvlg/ c9b69macmd iz 1-b4sistance is doubled, the power dissipated by that cib6b 7*/a-coyghv9r im9mb4dp c 1zl 6crcuit will

  If the resistance in a circuit with constant current flow2 5y/ekrp *.7r ojytmuing is doubled, the power dissipated by that circuit wm re*tuy2r7.ky /pj5oill

  If the current flowing through a circuit of con. o me6gycw +) g.0wjz7wcz3rbstant resistance is doubled, the power dissipated by thatwg0 6gbw.7c.yz c +oj3wezr)m circuit will

  During a power demand, .;mdf.d,crrs *fwxi8 uw .shvh1c 1k: the voltage output is reduced by 5.0%. By what percentage is the power on a.sfrc fmx8sukwdr*w h.1v,.ih d:c; 1 resistor affected?

  A current that is sinusoidal with respect to time feciy0; )yby:(5hdkivd3 bo 9is referred to as

  Consider two copper wires each carrying a curre 9(us;8pwr pi t3(ckz 5p0simynt 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 that9k3tcru5 i 0sw;p8ps pmyz((i in the larger diameter wire is

  Materials in which the e 8hc5p :sxx f0p (w5c je)tyj9mh7xq7resistivity becomes essentially zero at very low temperatures are refec8c) wq5(j 775xfemsyhpt phxj9 : ex0rred to as

  What current is flowing if 0.67 C of charge pvkgp g.,a yjen o2cd68w o)3 ;vy0ffn: ,wrkw7ass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus in 2.0 m7hza vz ;o;i-mg7lw( iin. What is the averai; wah(;oz 7z-lv7gimge current?

  How much charge must pass by a point in 10 s for the current fi6f c48*zo3tn; g6tgidb as 2to 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 flowi+t ,gwqeh (+aeng 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 curi-kd.vl oxc/ -rent, has been left on for 10 min. What is the net number of electrons that have passed through the coff clkixdo ./-v-ee maker?

  In an electroplating process, it is desired to deposit 40 mg of silver onzyw* fn,-g2f e a metal part by using a current of 2.0 A. How long must the current be a e-f zgw*2ny,fllowed 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 flow thro( ckqyv,01q ygd29w biugh a resistance of 330 Wy91qkb0cvd, iw2q(yg ?

  What is the voltage across a 5.0-W resistor if s2 y1 56n/q ,ytyq;v:pgirpag the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. Wh+,hc r3,f bhzrat current will flow?

  A light bulb operating at 110 V draws 1.40 01lbr0m afc cx(183ln:yfehejl sx *)A of current. What is its resistancefe3r1jxl0l nx (1yh* l0:bcf8ma) ces?

  A 12-V battery is connected to a 100-W resistor. How many electrons flow thrxe enhznf.d 85g1r;m: ough mg1 ;fezhe.r 85:xnd nthe wire in
1.0 min?

  What is the resistance of 1.0 m cog+ kffykm) 67n4pxh uimz10b 7pper wire of diameter 0.40 inch? (The resistivity of coppeu17yf7ixz+ b) gm4mknf 0kp6h r is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of :a6g9 j 200d3ex(omtcjhgl cu a circular rod 1.0 cm in diameter and 45 m long, if the restj gdgh ajoc3x:le096u2c(0 mistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resistivitr;qan ka* 50um2xp,fby $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (resi3:(q 8ii xok4haw*zskdu;5s pstivity $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 ohmneilf3ruoi/2s8 .- v8h l8flls. What is its resistivity?

  Calculate the current through a 10.0-m long 1iu at-o. e0vm22 gauge (the radius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. (The reeo0uvmta-. 1i sistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm ltl-xx3hds- i 6ct7)w*q6o y mqong and of rectangular cross-section, 1.0 cm x 2.0 cm. W x h ty)wcqm3i* od6-6txl-7sqhat is the voltage 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 has a radius oirlmhze3m -7w r+,- aef 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 (resisu)g6 jxdt, gq 3ra)c;:ur vij4tivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor haq rtoyh 6w21n5dp sp 3uor6y.+s 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 coefficient of resistivity of platinusv 0 a3lh5uzr(2ojxw u6ns9v9m 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 meltipjw th5gwnt*7;5au *+qe d2 rv+2frv eng point of indium. The resistance of the platinum +*2 2jhe+wa7;r 55 vr*dgv qwup tntefwire 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+np:d7nu/h vs $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is radd nx-q ulhbdh ,1y)(41bwx8x ted at 1200 W. What current will it draw?

  A 150-W light bulb running on 110 V draws how 9hoo lc+og,s9 7k uh,lmuch current?

  What is the nominal resistance of a 100-W light bulb designed to b.is e79tm o40 flmo3-xgpxhq -e used in a 124 xq7 p- o0-o.h9elfgm3m istx0-V circuit?

  A toaster is rated 800 W at 120 V. Whayt1sv2:k is6w sah5ka* nfl *-t is the resistance of its heating elemen v6s1kf t5s n:-li*2syk waa*ht?

  A 200-W resistor is rate1 f6xsnsq 6uahs)w7i*e*sl0hd at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rr+/,ajy sg1vs ated at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb.h p+dopfrfi:lnc)( mw*3 c+a(x bb6h 3 If it is used at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If v)g-l8r: x 3+,qeuzl 2jagpoo it is used at 120 V, what is its resistance?

  A 25-W soldering iron runs on 3(d5ij6 z t +nuy:bdh7l1zykz110 V. What is its resistance?

  How much does it cost to operate az-,/ ptr(krwvct zthj2 f5s2,e c:7z q 25-W soldering iron for 8.0 hours, if energy v-tzwjq t , :rsc ( 2ze,/fphcrztk275costs $0.08/kWh?

  How much energy does a 100-W light bulb use in 8.0 hou2+ryqaba fa oq4sn;yyd; if);p/. fk:v -.sacrs?

  A 1500-W heater is con2e f xrl)iko(6nected to a 120-V line for 2.0 hours. How much heat energy is pr 6rlifek2xo )(oduced?

  A battery is rated at 12 V and 160 A-h. How much energy does the bhxfq/ip2q+e 8 attery store?8 eqhx2i+fqp/

  How much energy does a 25-W solle;jif,0 w7rwdering iron use in 8.0 hours?

  A 100-W driveway light bulb ;0 qm,hq5 q((mwbird7 jt5terlf6 k5o is on 10 hours per day. Assuming the power company charges 10 cents mfri6( l;57rqb0ktq5 5q hmj dw ,(oetfor each kilowatt-hour of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is uy nk)1 /s:crmga7 ua7qe686 lrrozl: turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cola1uar rr8k) /:6 eg7s yum:lqo7zc 6nst to run the computer annually?

  The monthly (30 days) electric bill included the cost of running a cez.as/m06c vl/ acfdq7t mn q56ntral 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 76cn.mz5a c/qm6v adtsqfl /0of the monthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element in an electric drier operates on 240 V and generates p pkkclzl1k d0336y. uheat 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.) What effect wil k0pzpk6.1 ukdyl 33cll the repair have on the power dissipated in the heating element?

  14 A of current flows through b5/ e2 g(uq fpoep*vfl73gm q/$8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costsb;neae)z6 nxaj. 2 0v fdsyb)- $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 wo9r zkv*96u g*vlkg, cork at the rate of 2.0 hp has 60% efficiency. How much current does itl9grvvu9o** k,gk c6 z draw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power sourcenrxx(p*6:dt1iv 4 jnl . What rms current flows through thi6(d vlj:x1pr*4 xt nnis device?

  A 500-W device is connected to a 120-V ac power source. Whn27)9/ mdp xx ya84gntxcdyn1at peak current flows t n /4y8ynx)19pddn a7xtxm gc2hrough this device?

  A 500-W device is connected to a 120-V ac power source. What is the peak voltag.eel kg(3)ak 3zzq/woxt4 z,fe acros/ kz 3q zlx)f.kot(4w,gaz3 ees this device?

  The diameter of a copper wire is 0.081 inch. The maxim)cx:qof/8axts ardb)b3v)1s 3dh2g zum safe current it can carry (in order to prevent fire danger in building construction) is 20 A. At this current, w)voaxz:f 8g3t)xhc bsd qbasd3 r)/12hat is the drift velocity of the electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)