A device that produces electricity by transforming cheml 4tj n6)0bcxyical energy into electrical energy is cal x4b)ty06njc lled a

  A car battery

  The total amount of charge that passes through a wire's full cross sectio evb+3zrwh:+/:xzh ren at any point per unit of time is referred t/+:e3h :rbehzwxvr + zo as

  The direction of convention current is taken py)3 (qktmu 0yto be the direction that

  A coulomb per second is the same r;h fsc5z g*)vas

  Car batteries are rated in "amp-hou 9e4pqd5f dv6prs." This is a measure of their

  The resistance of a wire is defizg 8- jr0q1gxqned as

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

  The resistance of a wirt,.t o-nyc4 n *q52vrxb0vp xme is

  The resistivity of a 6egsmn0//yvr +u0 f sfwire depends on

  Which conducting material has the lowest resistivoq)zn 5kq hz/g+c9.+ :w dc fak;e5pjlity value?

  Consider two copper wires. One has twice the length of the othjzg y2d. 56h/wpgmgq9er. How do the resij2ggpz9y6wgmq.h5 /d stivities of these two wires compare?

  Consider two copper wirsm6-uy(e n2jnes. One has twice the length of the other. How do the resistances of these teuys(j62-nm n wo wires compare?

  Consider two copper wires. One has twicx1iig 4mff: y /5(pbrge the cross-sectional area of the other. How do the4m ii1f/ xfrgpg(b: 5y resistances of these two wires compare?

  Consider two copper wires. One has twice the lwg5 umc//g ,rtc,z6w-( tuuspength and twice the cross-sectional area of the other. How do the resistance5/ugw/( - 6 gc,u,zucp wmrstts of these two wires compare?

  The length of a wire is doubledod a ma6t:wl65x;u4w, (.c unomi;z ev and the radius is doubled. By what factor does thn .5 t,a6(l aomv wcewd;omu;ix4u6:z e resistance change?

  How much more resistance does/kpa+v/m- wyud)b rti73xj8s a 1.0 cm diameter rod have compared to a 2.0 cm dia38mxp-w/is )d+ru/ 7yb tj vkameter rod of the same length and made of the same material?

  The resistivity of most cae*iy bn+q4um x) ot;-ommon metals

  Negative temperature coeffi z2fg/rq)ywxo ;cx4y8cients of resistivity

  What is 1 W equivalen: -.3e5e6 kjgvldfay+ nzb)e gt to?

  A kilowatt-hour is equiv53y6hm qjtt fot,ic. ,alent to

  If the resistance in a constant voltage circuit is douk-zt23s llf i0a:w* hcs9(kizbled, the power dissipated by that circuit wiwi(9l l0fzask23:zciht -* ksll

  If the voltage across a circuit of constant resistance is doubled, the ;s/0ga 4pekdmpower dissi/sd g0;4emakppated by that circuit will

  If the resistance in a circuit with constantxybv/) /y3cu mu)wz8p1s q.kr current flowing is doubled, the power dissipated by that 3xv1q wycpumy/b/zus8)).rk circuit will

  If the current flowing through a circuit of constant resistance is douwikbp/ ia dfts11s 0.,bled, the power dissipated by w1d1b f s i.a/ki0,tpsthat circuit will

  During a power demand, the voltage outk)mvn nzi f/)9put is reduced by 5.0%. By what percentage is the power on a resistor affec )v)m/zknn9 fited?

  A current that is sinusoidal with r*heu azh2 fx47espect to time is referred to as

  Consider two copper wires each carrying a current of1+ama qlz2z v)+zm -ks 3.0 A. One wire has twice the diameter of the otherv zmak1am-z )zslq+2+. 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 vdo; e as3d 66cpbj*9bgery low temperatures are referred t3bjpbdo6 as*6 9g ce;do as

  What current is flowing if 0.67 qu7ol8z,x sipyur2u:; 6 vvh6C of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus in 2.0 mi7 tkcix.r- 0zsn. What is the average current?z-xr 7i0.tskc

  How much charge must pass by a point in 10 s for the current to be 0.50v7v,ko2thr a55ql ;em A?

  A total of $2.0 \times 10^{13} \; protons$ pass a given point in 15 s. What is the current?

  What current is flowjy,w *pl,fup- ing 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 current, has been left on f jfyn/)1: mwvgor 10 min. What is the net nwvyj1gf :m /)number of electrons that have passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40v7(d ioqdo:m hd2nr 1q*d- 1ji mg of silver on a metal part by using a current of 2.0 A. How long must the current be allowerq2 dj*do1:hmvni( -idd7 q1od 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 * uu8fcu8woe1 required to cause 4.00 A to flow through a resistance 8ufc 8oe*u w1uof 330 W?

  What is the voltage across a 5.0-W resistor ifkio4 e /0cjb1v the current through it is 5.0 A?

  A 4000-W resistor is connected across 22znmut svs.n+q8c6v 0; 0 V. What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its resistanm2 2pk dbzg0ml6-gy (xce?gl md-pgx2ybkmz 26 0(

  A 12-V battery is connqfi /pk a;b9rr4+z14g7 lijxmected to a 100-W resistor. How many electrons flow through the wilk 9jxz7+ /r 4amqfgri 4bpi1;re in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0.40 ):u2i v ccfp/.ua wpri,b wtd,bj/)q* inch? (The resistivity of copcai /bqc wu2p)pu td biw:r v*/).,jf,per is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 s6+zo7 hgekqf0/yliczy0 1cw: t :g,tcm in diameter and 45 m long, if the rtw 0iysf lco7:hzg1 k +zg:ctq0, y6e/esistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resistiv 1 *8:14qwstyjq oscfv tpkmub h8z7da*kd+1)ity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper b1 njr,dd w2cxzp,rp86 o.3vkwire (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 resistivity? hw9i1pr h3w4v

  Calculate the current thrs vye(gattx47/s/5 bf , :gigtough 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 resistivitysg b5e:gvgx,(tfsi/ ytt7 /a 4 of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and of rectangular cross-sectodz. r w0)/sd55o fccbion, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carries 4000 A? (The resistivitfc .o5 b0sdow)dr5zc/ y of copper is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichromehu gs,s1;nd5,jlr(f0bo. eq e wire has 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 (resistivity s-sdugc leb x j(7.rro:ai0 t:7r -dj8$1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistance of6geyuk -*ekg3 l np.g2 $18 \Omega$ 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 r8a8 yeksb50rew.d9ag sk;za. esistivity 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 u 0eek7k4 *tpjwsed to determine the melting point of indium. The resistance of the platinum wipe*e4j kt 7wk0re 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 uq/xdeeer 5,+ an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What currenkb.r enz2k5l+on5:mxnyv 72 ht will it draw?

  A 150-W light bulb running on 119)lxqmxk l+q4v6)0lujw vw5b0 V draws how much current?

  What is the nominal resistance ofv c38uk*x z)nqe1fx)o a 100-W light bulb designed to be used in a 120-V c*8 )1eo3 vukx)nfxqzcircuit?

  A toaster is rated 800 W at lwbw3*s(j/. kly2wt o120 V. What is the resistance of its heating element? kwto wlly3.sb/j( 2*w

  A 200-W resistor is rated al1+am 9ke x3mj+qj- v)xei 0emt $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated at qoelxv3 z2)x k/ h pa;b4m83id$1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, t k xf0(kx54+x 12 z lj8izb4mrw3kxmpwhat current does it draw?

  A lamp uses a 150-W bulb. If it is use / oflevvwx, :,tr2l;t-tfi0ad at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V5gdhw3 -:znap . What is its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours, if ener7-0tdz ;hmpccgy czpm- c d0c7;thosts $0.08/kWh?

  How much energy does a 100-W light bulb use iiof 9 bnzt7z--q9pew 8n 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much heat mk:k5b+hyi. chjms. )energy is pm5:hhjy ..km+i)b k csroduced?

  A battery is rated at 12 V and 16e( hc 7y-+l +pu zwhn6m-wogo20 A-h. How much energy does the battery store?o6mwwh+gc + u -2lp ynze7o-h(

  How much energy does a 25-W soldering iron use in 8.0 hours?:wmjn 0nt;i,2i,sl ra

  A 100-W driveway lig4 nkpaoh*ut+ . pm,um0ht bulb is on 10 hours per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cpp,4 tuo+n m khmau.*0ost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on u 1zanzx 5.d;q8.0 hours per day. If electricity cazd z1n5x;. uqosts 10 cents per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) 1qlued /( np;dr1v:q)rxeb(selectric bill included the cost of running a central 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 contri/1nrbx)le1;ru((p d:qv d q sebute to the cost of the monthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element in an electric drier 2+filyo1)i 1q:j:e3i p5x f kxxvhh(eoperates 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 temperature is unchanged. In reality, the resistivity of theyk)jex +f ip(hxl51e32ii1:xq hofv: wire will depend on its temperature.) What effect will the repair have on the power dissipated in the heating element?

  14 A of current flows4ae88qz my;l81szs u s through $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery cost3m2gg qj8 7rqts $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 ratb:7pca-5e4 gtvnq ;l.v(rn r d*6fpnx e of 2.0 hp has 60% efficiency. How much current does it draw from a 120-V line*rl pn(trnc4:b;5vfa7 x qvp6 endg-.? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What r3* uzjrgrp ar p;);0pmms current flows through this dg jzu;;m*rr prp3a)p0evice?

  A 500-W device is connected to a 120-V ac power source. What peak currentf z4b+xv.0it1 qwi c:y flows through this device?1t:zicb0yfv. qxw+4i

  A 500-W device is connected to a 120-V ac power source. What is the pv )h51yo(ey pe ,9f:ufot 4cmjeak voltage yoeyp jv59o t, ec)1(f:muf h4across this device?

  The diameter of a copper wire is 0.081 inch. The maximum safe current it canjl-c:ujfn, +j ogbguk6gr 142 carry (in order to prevent fire danger in building construction) is 20 A. At this current, what is the drift velocity of the electrons? (The+jjnf r6cglbu1 2 -o,:kgug4j number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)