A device that produces electricity by trum54 tq0shzwb9m k5bb3j,7ri ansforming chemical energy into electrical enuj57wrmm4 b3hk 0zq,9stb5bi ergy is called a

  A car battery

  The total amount of charge that passes thrt)6er jz7h):9 xu xlrwough a wire's full cross section at any) xzhw 7l:r)6utrex 9j point per unit of time is referred to as

  The direction of conve5zh o1h)(jl3wwcjvs k*qm; :antion current is taken to be the direction that

  A coulomb per second is the i6+l h7-t mp n7qeh(hesame as

  Car batteries are rated in "amp-hoeo 47cp6jpwwi9-2l unurs." This is a measure of their

  The resistance of a wire is define9zz 0g dx*f0q .nnmm3ld as

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

  The resistance of a ) xcb:w1t/l itj su rf0 fx*ctwh8j01-wire is

  The resistivity of a w)z0is4(vj (ne -h gsfaire depends on

  Which conducting material has the lowesmhsyp4rc2 1na) 8ic8pt resistivity value?

  Consider two copper wires. One 3 2uc 9hjkudonrd*(2xhas twice the length of the other. How do the resistivities of these two wires coo2 d9rh u*kcn(jd2ux3mpare?

  Consider two copper wp2i sp c)hb*c1ires. One has twice the length of the other. How do the resistances of these two wires c)*ib1s 2phcpcompare?

  Consider two copper wires. One has twice the cros1es tbe)86:bj ii-xz ns-sectional area of the other. How do the resistances ozxe1 j: t- b86eb)sinif these two wires compare?

  Consider two copper wires. 8ed -xnd13megOne has twice the length and twice the cross-sectional area of the other. How do the resistances 31de- 8emxdn gof these two wires compare?

  The length of a wire is doubled and the radius is d rt+ 4q4z6o;9rhclutzoubled. By what factor does the resiszo r thuzrct4+4 ;9l6qtance change?

  How much more resistance does a 1.0 cm diameter rod have comp huxlgj.+sj3qb w.2 5kbv5-e-o gkw7qse /-zlared to a 2.0 cm diameter rod of the same length and m2jglvx.+-- osk s5/bgqzle.b5j37 kw-w eu hqade of the same material?

  The resistivity of most commonueuklb(-r3tp g n,5hdt 87k1j metals

  Negative temperature coefficients of pja)+ knnfkk0j655 1pr0 sh0jnon+oe resistivity

  What is 1 W equivaleq0 qo:siy2i3hc hvlw(n y1pd g; /(3qunt to?

  A kilowatt-hour is equilz1lde6 6s88 pfvd(fe/p8 br(wvfq8s0 pbx3k valent to

  If the resistance in a constant voltage circuit is doubled, the power s1/v0v 9qd t:0wnddjt dissipated by that w:00j 1t9 vvqntds/ddcircuit will

  If the voltage across a circuit of constant resistance is doubled,2w z.6-wp0gy lqkx5 jcg0gvzo (c x-.n the power dissipated by that circ2gc 5v-.q(.lk0xgwwjz60np oz cyx-guit will

  If the resistance in fgyk8ip /- eg,3 52f3 jobcndua circuit with constant current flowing is doubled, the power dissipated by that p8 jofk/2g-i 3gb3,fc ey5 nducircuit will

  If the current flowing th wysma0 +5qx7y uaxx/+rough a circuit of constant resistance is doubled, the power dissipated by that circuityq+wx0m/sxu7yaa5 + x will

  During a power demand, the voltage output is reduced by 5.0vx0 qpwa 0vfcz)78 /zd%. By what percentage is the power on a resistor afvzfa8 7z 0cpq/0x)vwd fected?

  A current that is sinusoidal with respect to time is referred toj g s-z)2fbmo4 as

  Consider two copper wires each carrying a cu,dyem6t se.(n;p3fb d2 0e j.zgxy(wh rrent of 3.0 A. One wire has twice the diameter of the other. t.s2(n6 , ew3bphyjd f0e;xgd.m e(zy The ratio of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomes essentially zero at very low temperatsxa6vy e/ zt9 mb)765uwi1jsw ures are refer6 myws b7xju/vts1 e w96iza5)red to as

  What current is flowing if 0.67 C of charge pm*fi wbony n 6zvdf74i/e0.6 dass a point in 0.30 s?

  A charge of 12 C passes through an electroplatingby ;7tets c:jh-oywpr- t-2h. apparatus in 2.0 min. What is the average2t :.hotj yyt;c7 -pb-hrs e-w current?

  How much charge must pass by a point in 10 s for the cu 5lmtnqg,p2f3 xxf;v 0rrent to 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 flowingde6o9k c:k kh.wf4a 6u 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 .-bt* ,cp i-bk3ouiso A of current, has been left on for 10 min. What is t*bok3, .uipsibt c--o he net number of electrons that have passed through the coffee maker?

  In an electroplating process, it is desired to deposit 4) y/ 4it 6vl /2bq1kwwyei3efp ss6*fd0 mg of silver on a metal part by uedvf/ept biis*l s ky16q 64 3wf)yw/2sing 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 weight of silver is 108.)

  What potential difference is required to causatakbtay 8;*1fjwt/55x s wp 8e 4.00 A to flow through a resistance of bwfa8x1tkpa 5y8a/tt5*;sjw 330 W?

  What is the voltage acrossb+pzp;g3 e p9*o/dwje a 5.0-W resistor if the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What currenk4hym2(0gi nft will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What/d qvy6;*sh0qw,fl ( -usmkc o is its resistance?s(-,v0olf yqdhw u*6q smc;/k

  A 12-V battery is connected to a 100-W wzl:;j u7es:oresistor. How many electrons flow through thz ewoj:u: 7;sle wire in
1.0 min?

  What is the resistance of 1.0 m coppy1 okfy8).;j ro5vc dber wire of diameter 0.40 inch? (The resistivi8kcr)jo5vy 1ob;. f ydty of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in dib5(r-u/s llq w 3b1jjxameter and 45 m long, if the resistivitl1qjjlbsx w(u/ 3-r5by is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper w 7sxj vuix51yw8k 7pu)ire (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 (resisol:pqk* q;msex1:(8nq ko9 sgtivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 m long, measures 0.-b1.b( 2ilwtypyj9 ks wnq(r1040 ohms. What is its resistivity?

  Calculate the current through a 10.0u/6 odm-6couy -m long 22 gauge (the radius is 0.321 mm) nichrome wire if it is6myu-oc ou/ 6d 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.lhgsjdvw0 kl8nl ; .9v 8jbaeu 877maaz* +6jg0 cm x 2.0 cm. What is the voltage drop along its length when it cln g0 ;mbjk98jl*+vz lvu7es87adg8haja. w 6arries 4000 A? (The resistivity of copper is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichrome wire o )/mpdftn ,x4vwo*,zhas 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 (resito;hfll 3 c1ktopc/( ;stivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a c s5hwly- *f7 o* (htz0oun*emresistance 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 msc o2z8.z/s hof 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 indium. The res6t-vg6u/v dc sistance of the plgvsu6v t6-d c/atinum 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 throbtyw2h,i1ai h 4(f csp.q 6;8ityfv r(ugh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. Why(jarvdw :g+a 8+r/g7d uu,lj at current will it draw?

  A 150-W light bulb running on 110 V drax isdjpuv1 .gnd)/ssra3 6t-v)fp n31 ws how much current?

  What is the nominal resistance of a 100-W light budowc66h t zty. q3i+:ylb designed to be used in a 120-V circ.td6 +ty wc3 6hyziqo:uit?

  A toaster is rated 800 W at 120 V. Wjlmv ggm7z* /l:8o1gmfo ;1hvhat is the resistance of its heating elementl* gf mmm:8 ov1voj1 g/g;7hzl?

  A 200-W resistor is rated oa:bwq 3vsrie0j-h**g mjm7; at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ra4 w5 ,hjn wrfms2d56 6gro+xbfted at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what cxtt2 p9b nc8d+urrent does it draw?

  A lamp uses a 150-W bulb. If it is used at (ot, cc6k ockskt 3-ta(wi7v/120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What is itsr c6.xex;5.xx1sarqp resistance?

  How much does it cost to operate a 25-W soldering iron ,n6bn;,abl9wjhjwxhf:e - ( pfor 8.0 hours, if energy p f,w:jae;6nw 9x,lj bhhb-(ncosts $0.08/kWh?

  How much energy does a 100-W lighzn qb5rt/ y6y9z5 1 g3w ldppqkeo:+x8t bulb use in 8.0 hours?

  A 1500-W heater is connected to (urxg(1s9wtn a 120-V line for 2.0 hours. How much heat energy is prou9gw(trx( ns1duced?

  A battery is rated at 12 V and 160 A-h. How much energy does the batte5c lnn 8gf1c3.j wtj:a 31yx;jzj t,zlry store?1 :nlncf xa;j ,wtl.8 1zj3j jc3g5zyt

  How much energy does a 25-xdnq6m06k jfwv oz/lti k3 t (+d70,guW soldering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per d/ ;jmr-vy9vf; q v0vnday. Assuming the power company char /nv-m;j;v0rv yv9 fdqges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0 hdx3i-6s 6a6uoh(f ut hc;+ragours per day. If electricity costs 10+h-sxaf(oaudg6iru3ch 6 t; 6 cents per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electric bill included the cost of runn *.q ys3*scw fab3bk0(ga .ojking a central air-conditioning unit for 2.0 hak0* k*gj swf3. o(3ascqbby.r/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 an electric drier operates on 240 V and:- lj)/5czai (reg al :ntgly1 generates heat at the rate of 2.1 kW. The heating element shorts out and, in repairing it, the owner -g) jl ct(1a/n:l liy5:gazer 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 will the repair have on the power dissipated in the heating element?

  14 A of current flows throug4hl k/+pxl x8ah $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs0/e ys2g.dw+,c5p ,p fhcm8yew) avtg $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. Ho d vz2;kk7,.+ :3i +xmvpsywspl(omlfw much current does it draw from a 120-V line? p2ks+7mvfxkp;+(ydw, sl3 :i om zv. l($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rms current )j-y*a 0 68jovgamjya flows through o8)ja6 0vy-jjg* maya this device?

  A 500-W device is connected to a 120-V ac power source. What pel81plrq n,9dsg 6e ae5ak current flows through this device?lne5 g le8dps1r,9q6a

  A 500-W device is connected to a 120-V ac power source. What is the pe1)5mmm-qjd8nxlkw 8 p ak voltagen1m8 dxlpqw- m mkj)58 across this device?

  The diameter of a copper wire i (owxzoy5m,+ bs 0.081 inch. The maximum safe current it can carry (in order to prevent fire danger in building construction) is(wym o5xz o+,b 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 $8.5 \times 10^{22}$.)