A device that produces electricity by transforming chemical energy into2u6uet rno) .p*,+ lyguzi/48ffrmf e electrical ener2/o)pr46egfum8 *zuelun.+ y,tr fif gy is called a

  A car battery

  The total amount of charge that passes through a wire's full cross section at ax7 gn 0-nt 4(c5nktcrqny point per unit of time is rer4c0- gk7cnqxt5nn(tferred to as

  The direction of convention current is taken to be the directozfp - 4,.g+ paj wu5+v;fwybkion that

  A coulomb per second is the samee 3f 1 m31ips9brz9tto as

  Car batteries are rated in "amp-hours." This is a measure of tq8 r(b7kl/az x:lw+ef,xz yd*heir

  The resistance of a wij26quf 1e e5ptre is defined as

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

  The resistance of a wire is w-o3mz21 hn nngtjdq l5moh4cg63. n9

  The resistivity of a wire dsymhv5t +m (/wh ,wwl.epends on

  Which conducting material has the lowest resistivity vtrl*ap18vo r 4alue?

  Consider two copper wires. One h. j zuv2e8nrx3-ho4 eyas twice the length of the other. How do the resistivities of these two wir. uv-2xey rn483hoj ezes compare?

  Consider two copper wires. One has twice the length of the other. How do the /6 7d; -g t.q jlrsilqerfpf4(resistances ofds/rl( l76j.efqqf tp i-r; 4g these two wires compare?

  Consider two copper wires. i(*s8-mh1 vjb( na vnxOne has twice the cross-sectional area of the other. How do the resistanbnnm(ai(8 x v j-1*vhsces of these two wires compare?

  Consider two copper wires. One has twice the length and twice the cross-sex/5 9nard crtk+8rvq5qk 0pnk )ryi +4ctional area of the other. How do the resistances of thvcr05r ++i4apq )tnk9y dr5 8k/rn kqxese two wires compare?

  The length of a wire is d,euyxv5:ke , /-ndbtv oubled and the radius is doubled. By what factor does the resistancee5xbtu vn-,d,k/:vy e change?

  How much more resistance does a 1.0 cm diameter rod have compared to,ay cqsunfh 5y3)dj(7o-h-z ju+/xz u a 2.0 cm diameter rod of the same length and made of the same u+y nfzoy cxaj udzh,3j-5hq)u-/(7smaterial?

  The resistivity of most) rw*3ul 5uq zek(sp+p1u +zrp common metals

  Negative temperature coefficients of rezo.l* u;ut9hn 5 mp2 vuj*g ksm3-i4imsistivity

  What is 1 W equivalent tt4 r/1 ivt4wnio?

  A kilowatt-hour is equivalent nq1(cu:( bate. kuyqx7se j b3)+z ,qfto

  If the resistance in a constant voltage circuit is doubled, the power dissiz,c;9km mub wkl-fapc(72xt d 67 e3xkpated by that zm fk9cwd-ktmcxe3 pl2,uk(ba77 6;x circuit will

  If the voltage across a circuitms88vh9rujc,;j4 ka0 oyp 7 kv of constant resistance is doubled, the power dissipated by th 8 8,hum jrvk 7s4p9akvy;cjo0at circuit will

  If the resistance in a circuit with constant currem0gactvvzb 6g3ql.ew5h-:x/nt flowing is doubled, the power dissipated by thag.3xa:6b/ - w5th clgqvmv 0ezt circuit will

  If the current flowing throu;sq) 4 voo)wo)zih; mte zrzi8x5 .y,lgh a circuit of constant resistance is doubled, the pow4)ev zrwsy;;)i)l ,xth8.im5q ooozzer dissipated by that circuit will

  During a power demand, the voltage output is reduced by 5.0%. By what percenta27cbndvdiiuz 8pw o)0s;j ,)n njx7a8gi,j8 w2)nzd7 dui 7b sox8;np)jvan0c e is the power on a resistor affected?

  A current that is sinusoidal with respect to time is referred to aye u.wg -nyf*v0apn++ s

  Consider two copper wires each carrying a current of 3.0 A. One wire hk6r0;f x*-zh y tww( mozyy):jas twice the diameter of tr;ykj:(fmwwxt z) yy- *zh0o 6he other. The ratio of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resaf7elbt1 l kzzgp0 49*istivity becomes essentially zero at very low temperature90kz* ltfab p7 z1gl4es are referred to as

  What current is flowxoe4 yfuwhx*nk4q 39:ing if 0.67 C of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparat 1/vqq)mzjr:mv d/l; bus in 2.0 min. What is the average current?drj :q/bm) vq1/;vz ml

  How much charge must pass by a point in 10 s for the current to be 0.50 Av4sjq ks ;r.x .85rlv :tvo:cc?

  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 4nsmkaq fr836$4.0 \times 10^{16} \; electrons$ 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. Wq/ypu3)0bqyo ae-z s lv8zj9/ hat is the net number8jvba-e qpu9 0ol3szyyq)z// of electrons that have passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg of silver s1;-g1en9yb hn ei .bjtr *,rron 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 wee9*jn;hg n1r1rebrs , . -bytiight of silver is 108.)

  What potential difference i s2tha-0nj 8v:cypi :pb8ukz -s required to cause 4.00 A to flow through a resistance of 3 0ivp :8s-pnu-tya cjzb:2 8kh30 W?

  What is the voltage across a 5.0-W resistor if the current through it i gyqucu*q ;(;w*dc)z kkrygi-0(3krqs 5.0 A?

  A 4000-W resistor is connected across 220 V. What cu-(qylk*-q xy gc7ez;l rrent will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is axtr +f.,ml(92i uncobt .f9tits resistancef.a2t (9xfc, imn +o9tubr t.l?

  A 12-V battery is connected to a 100-W resistor. Huct/e7oj*x 3gow many electrons flow through the wir3e/to j *ux7gce in
1.0 min?

  What is the resistance of 1.0 m copper wixmt*uvl10 y)la4* o g f3duj2are of diameter 0.40 inch? (The resistivity of cop*1mtluvjy 3gulx0 oaf*) 4ad2per is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a ci n,3a:no:*j tycs)dpd-rmob( rcular rod 1.0 cm in diameter and 45 m long, if thcmp 3),:o(:d tnodj- nayr*bs e resistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of coppe,owzn(jz:+l w /hsfiq 6uf-6qr wire (resistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (r;;- vcdt g4nau/mw8bsesistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 mpl el 5+/z8/cftkw*lo long, measures 0.040 ohms. What is its resistivity?

  Calculate the current thmk,;o8e h -mfhrough 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 resistivie8-;,mm hhokfty 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 c6 07taoyy6bt sm x 2.0 cm. What is the voltage drop along its length when it carries 4000 A? (The resistivity of copper isabtoty y 6706s $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichrome wire has a radius of 0.50 mm and a resistivity ofxr6x z zo4*0akx) v )9bcrl+xv $100 \times 10^{-8} \; \Omega \cdot m$. If the wire carries a current of 0.50 A, what is the voltage across the wire?

  A 1.0-mm diameter copper wire .nv7k9h4: v m*xk:hkcf:gjps(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 hasfy f* e)ylf6ol(hg7b; 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 resistivyrqf1-n( w6s0 m 3j swzdld:f:ity 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 determinehqn n 3xmj0a 0bu,qh;+ the melting point of indium. The resistance of the,h0n0xabnj;q q3h um+ 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 thro(5s xt174c t dwnrkgg3ugh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. Whw lchi2(qj2jnz u b:4/at current will it draw?

  A 150-W light bulb running on 110 V draws how jczuno2pn45( much current?

  What is the nominal resistance ogxc0c j:4g1 fkf a 100-W light bulb designed to be used in a 120-V k4gx fcj1c g:0circuit?

  A toaster is rated 800 W at 120 V-kimc4se 6ol* fo-wi1 . What is the resistance of its heating element?e6 lwmof si-ocik *4-1

  A 200-W resistor is mnn 3w3u 2sf1e td5nk4rated at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rat0kn)ajced .0f ed at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what current does it dra3bt6 )l*1xs pdalfcd +w?

  A lamp uses a 150-W bulb. If i/g1cqor:i i5p t is used at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What is its res5fwbll(zv/:pf,wpju 5, qw8 ffl :s. distance?

  How much does it cost to operate a 25-h9 qicom+ e2 j6+-oxsml t0r;b+6-jh,ld mwlqW soldering iron for 8.0 hours, if energy coqhi,rxbm 6ll-jjec+d w-m9t02 l6+ oq+ sohm;sts $0.08/kWh?

  How much energy does a 100-W light bulb csz ; t6fffe+.)ap *knuse in 8.0 hours?

  A 1500-W heater is conneyh0n59*t4+pejaau kn b/wui) cted to a 120-V line for 2.0 hours. How much heat energy is produced?y5tbke0pj)n4 +/ u ainuhw9a *

  A battery is rated at 12 V and 160 A-h. How much en 9g .gpp,,dw)jfved6kergy does the battery store?g.g9p6v,kd fe d)w,pj

  How much energy does a 25-W su 1--m zlbmf+qp+a+l joldering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 *wnytkq.e5z2 0x (vryhours per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimatzr q( 2w .k*50yevyxnte the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned p9-2 :f 489jk)a msli vadujzjon 8.0 hours per day. If electricity )mzjkp-: 9as2ld9jfjav 8ui 4costs 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 centra.+qfoa 3s mmap/en qv an-yd8dma6z2220 fey;l air-conditioning-sa. 2 amd n0qfm+y vy fn8;2om6ad2eze/q3pa 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 cents per kWh?

  The heating element in anu;u5k 940 sqk8tr pduf electric drier operates 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 temperat ud ;8kuus 9p5k4trq0fure 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 througri-4 xp: eu:igh $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costp*g7,h8l oir7waonw* (zio) hs $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% efficienc0 aig +i;b;wefuw 6m4ry. How much current does it draw from a 120-V line? im r ia;;e wwgb6+f0u4($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. u:i e)ev6 3s6xloe5ij What rms current flows through this devi evxsi3luj )5:66 ioeece?

  A 500-W device is connected to a 120-Vnd6a0;d+xyom,d9w h enjsuy889 u4bd ac power source. What peak current flows thrjdoebn+w a4yx6n y; 88uhdud099,d msough this device?

  A 500-W device is connected to a 120-V ac power sou uk(y/g5zoz m0rce. What is the peak voltage a(km5yzzu/ 0og cross this device?

  The diameter of a copper wire is 4ml2 px0dua xrc(6ce 90.081 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 dlm xu xr4a2(cc60p9eelectrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)