A device that produces electricity by transforming chemical energy into e6j1 *m- c e11pbcdiwnhlectrical energy is callbe1p*jicw 1h c6- dm1ned a

  A car battery

  The total amount of charge that passes through a wire's ful:;miiy8d9 ud-.ncb x0 je9y ql)oi:bll cross section at any point per unit of time is refmdyl.8d;i9)ib0 iqxu:ojy e: lc- n9berred to as

  The direction of convention current is taken to be the directikyoiv2 y gju8i.e49 6ron that

  A coulomb per second is thu4iq/jy7 e ch5e same as

  Car batteries are rated in "amp-hours." This isnawxmp:r8 cc;-dso84v +d ;7dnlzl4v a measure of their

  The resistance of a wx1kp 9eoxtjl z (ic)/)ire is defined as

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

  The resistance of a wire vc7. 1yu 9yjalmof-b8.rx ,h1lbhax + is

  The resistivity of a wisnbzwo7 63:mjre depends on

  Which conducting material has the lowest resistivity a-. /m7mzo 7u ig(tysuvalue?

  Consider two copper wires. One has twice the length of the other. How do t y/wgwg 2gfkz3no. 7h:he resi2w fog7 /hnyw3gg:k.z stivities of these two wires compare?

  Consider two copper wires. One has twice the length of the othel ddsg 4 :qs75-6o+x smlnaoz1r. How do the resistances zsl o 1ns s5gd67xq4 o+-d:lamof these two wires compare?

  Consider two copper wires. One,,;pp9j 06lubqjfiab op2)ep9 fm d i* has twice the cross-sectional area of the other. How do the resistances of thep j9pmei au6f fpj,,;q)*lop2b0 db9 ise two wires compare?

  Consider two copper wires. One has twice the length and twice the cross-sect rtrp:0x(u6vjhc1u j6ional area of the other. How do the resistances of these two wires comparercuvpjt6u 610j (xh:r?

  The length of a wire is doubled awhmoy./ux0e kxz0 *hy a)1hda ta. 0b)nd the radius is doubled. By what factor does the resista0oh)h d/btyk0eu*z)1yh .x aa 0wm .axnce change?

  How much more resistance does a 1.0 cm diameter qw4eswsj )e (*rod have compared to a 2.0 cm diameter rod of the same length and made of the sq) w*es4jw(e same material?

  The resistivity of most ;ibq:el wb5gx7c v 2+qcommon metals

  Negative temperature coefficients of resisxqg78 tjhw)t5tivity

  What is 1 W equivalen 0afp+*ju25-uq( w do(kjzoye t to?

  A kilowatt-hour is equivalent to2kmkgbl d ; hx3k.4,plx*mujju6sg 7+

  If the resistance in a constant voltagb8qivv v4ph. ;e circuit is doubled, the power dissipated by that circuit will pvqvbh8 ;v4i.

  If the voltage across a circuit of constant resista7ctd4v g3wzbn. d 9 2x, utyg85/yuxoxnce is doubled, the power dissipated by that circuit wig4onyt 9tywxc ,b5d xu/ 7vd3z2x.8gull

  If the resistance in a circuit with constant current zdn/9krij h, zd,l( /kio32nj flowing is doubled, the power dissipated by that circuit9nd,2j,zioir (/jl n/kkz3 dh will

  If the current flowing through a circuit of constant resistance is doublednp-q:r bjd,wf;w:cm 6, the power dissipated by thanp f: b wr;-6q:cwj,dmt circuit will

  During a power demand, the vov/r k( 07rkqssw2 e/a b4h8rsvltage output is reduced by 5.0%. By what percentage is the power on a resistor aff( //kqsv vb 2 e8r74wksshrr0aected?

  A current that is sinu.gs3(blsu u:esoidal with respect to time is referred to as

  Consider two copper wires each carrying a current of 3.0 A. One wire has s6ymgj2dui*+twice the diameter of the ot2m jsigd*yu+6 her. The ratio of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resnl fg,45mqt5a. v:f5 1qrgx elistivity becomes essentially zero at very low temperatures arexr:mqafle 51n q 554.,vgtfl g referred to as

  What current is flowing if 0.67 C of charge pass a por8l4i -ibn+/j7g kjfbint in 0.30 s?

  A charge of 12 C passes through an electroplating appsff*snc n)m 47xpg3 s/aratus in 2.0 min. What is/7s m 34nscs*g)nffxp the average current?

  How much charge must pass by a point in 10 s for the current to be i3nl lpyt.lbx6y 2la*xv: e55 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:w)x,o:4 kmq, /xe;ltdmm hhx $4.0 \times 10^{16} \; electrons$ 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 7f8pvxv xlu 2)+as8m*q l)x+bba : ccdbeen left on for 10 min. What is the net number of elect*: l+adx8+vxxlc)2c)a b f 8q7 sbvupmrons that have passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg op4 l9qkd8s4d4r .vnwvf silver on a metal part by using a curr4rl pk 4vd qd49w.8vsnent 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 weight of silver is 108.)

  What potential difference is required to cause 4.00 A to flow th opk0my :lp8:qo9 12d+c3br0d u vkwut3*klsprough a resistance of 330 : +psk9:ryd23k 08pkd3wl cp0muub*tqo vol1 W?

  What is the voltage across a 5.0-W resistor if the current t k:zm tcyr+4 7*j,zn3qp ipsm*hrough it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What curr2.a51rtrv1 egbq+ q0;anz zxa ent will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its reroashffwq ssf926 lz- h d)mpi*u 2l v-;i)z16sistance?;u9)dszq -s lmphr)f ia22v1s6o6 wf*fhz-li

  A 12-V battery is connected to a 100-W resistor. How man51n.cfnc qqrpdy9ofs)1 e 1b(y electrons flow through the w1p5o )qn1eq.y s c9bf1d rc(nfire in
1.0 min?

  What is the resistance o zm 6o-sqva*. 4nqcxon;ut.5yf 1.0 m copper wire of diameter 0.40 inch? (The resistivity oovm6tqq u.z a54.oyn; sn-c *xf 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 long, if th ,dfp(xh) a1jwe resisti),d1 j(a xhpwfvity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resistivity n5;vev w f4 7+xe xcc sjniq+e9goo85:$1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (a1g-ilt t0icc dra9*(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 ohms. What is its o3k xs(d5;cu4tcwm p9resistivity?

  Calculate the current through a5ay -w /.s u8amhjijwhz9,8eb 10.0-m long 22 gauge (the radius is 0.321 mm) ni,ay e h8j5ww-j/iz 8ma.bu9h schrome wire if it 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 rectangular cross-section, 1.0 cm3k+dhn /* gka+xqpdr ( x 2.0 cm. What is the voltage drop along its length when it carries 4000 A? (The regdaqx p rk/kd(3 *+nh+sistivity of copper is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichrome wire has a radius of hr7/.drp68 o5 rv3dbsw/l9vg- o vy,zok d oq-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 wkc7oa 6-bq (id95fqb yire (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 ol b.i0e.b(uc.4ujwn myk4/kc f $18 \Omega$ 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/es itu2+ fi8t 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 poink tet-lr6cp:- t of indium. The resistanc -l:ttcke6r- pe of the 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 through anhf.g(hqd4qa2w +p o*e $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. Whaejzj r265rejxfh ;f9 ovje+ *7t current will it draw?

  A 150-W light bulb rc mtka)q1-q v(unning on 110 V draws how much current?

  What is the nominal resistance of a 10fn., t50wk5b qm j*aghi/)yn u0-W light bulb designed to be used in a 120-V circuit.*5 uh kiyqm )nn bwfa/0tjg,5?

  A toaster is rated 800 W at 120 V. What is the resistanc*0ixiut 3fm.m xw-;g he of its heating element?0mt*x f.i xu;giwh-3 m

  A 200-W resistor is ratf+o nk n9k0y,l8h1x xred at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rwpym7v;y0 wa 72ros/k (zml d3ated at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what currf.vms3b lm5 f1c9sh 6hent does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is its resistancj: 29cx 8 vgbo86hc9bfnzj,d, v )axnje?

  A 25-W soldering iron runs on 110 kep2n .v cm7mnb829tg V. What is its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours,/ki2bj9eisub0d 60h e if energy coskd2ibh6b0u sj9e /e0i ts $0.08/kWh?

  How much energy does a 100-W light bu-5ui rs2v u6wglb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.-cd aqww hfr7ospo)*m w)u:.70 hours. How much heat energy is produr* sop:dc)w ha7- .oqwu fw7m)ced?

  A battery is rated at 12 V and w6 0a b4g0wt(8eeeclz 160 A-h. How much energy does the battery store?a8t40ewzlbew (6g0ec

  How much energy does a 25-W solder5vy aon2:ajjh8jzh 4 nb jj.7lb:w08 ming iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per dayfjl*(: j 1aimilwcjx w2 d;75c hv;rr). Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, es);dri lmjhra ji725flv*(;wxccw j1:timate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0 hours per day. If epzghds /7gka pb n:):ke: 2w;mlectricity cos;: k ag m7:wb2enskd :ph)pzg/ts 10 cents per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electric bill included the cost of runniyb7+e6p n,v. ycc/pk6x isw6vng a central air-conditioning unit for 2.0 hr/day at 5000 W, and a series connection of ten 60 W light n/6pcxwy6cvyi .6+veks,bp7 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 an electric drier operates on 240 V and genex8bcs:v3 4aa3d x0otkrates 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 dek:dt4acb0833 as v xoxpend on its temperature.) What effect will the repair have on the power dissipated in the heating element?

  14 A of current flowhl2mzl43f5 2 qxjn.ris through $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costf6 tib ,xprab7.bl(c)a p/s8 ms $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% eft 2 (q 1hai(ew(o0mihuficiency. How much current does 2q1u0ai((iw (htoehm it draw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. db*8p h dz.7lpw h,9wtk-h7do What rms current flows through this de, hdw9* pd ho-78dpbk7l.t zwhvice?

  A 500-W device is connected to a 120-V ac powe wjkmkhi; 1rgep0.m2 s,*o7tyr source. What peak current flows tg*p0yjo7h .im kek ,mtsr21w;hrough this device?

  A 500-W device is connected tojv6zd5(i l f4a a 120-V ac power source. What is the peak voltage across this deifdl4zavj6( 5vice?

  The diameter of a copper wire da.v2 ld+r3q 2;lfzxh kafh* ,is 0.081 inch. The maximum safe current it can carry (in order,;ql rxa fkdhz2+.fd* v l32ha 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 $8.5 \times 10^{22}$.)