A device that produces electricitytja)qkka+/ l93-truyg/ za 8 o by transforming chemical energy into electrical energy -8 kyl a/9/3kr)ogt +aaujzt qis called a

  A car battery

  The total amount of charge that p e.p/sjz+g ow;asses through a wire's full cross section at any point per unit o sepz/ g+jw;o.f time is referred to as

  The direction of convention current is taken to be the dire et*4p9wm 2h:ers( nijction that

  A coulomb per second is the h88if pwvoq(j+a2 y :csame as

  Car batteries are rated in "amp-hours." This is a measure yxqs4kyg7-e4 of their

  The resistance of a wiro 8xwwl3jw 91le is defined as

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

  The resistance of a wvsj7 3oc6cyz.40 vpt;n vrvj,ire is

  The resistivity of a wire depends oqro oaa.8* n7eqq/ai+n

  Which conducting material has thehc:3 kswy0si +3 hbsx8 lowest resistivity value?

  Consider two copper wires. One has twice :tp tozix kdqv ;p29lk 1h/-2ethe length of the other. How do the resistivities o- dlxvz tqt:29;okhpi2 1epk /f these two wires compare?

  Consider two copper xhm8bgi0 w5 p,+emb /swires. One has twice the length of the other. How do the rp, b+hbi58es/gw mm0 xesistances of these two wires compare?

  Consider two copper wires. One has twice the cross-sect c i* 2hbyegr w1.q*8lpnh2axq7 /ik1aional area of the other. How do the resistances obn re *l7xi2h/8akc*i hq 1w2g qay1.pf these two wires compare?

  Consider two copper wires. One has twicec/;bal 3y r8c *k4zlys the length and twice the cross-sectional area of the other. How do the resistances of these two wires col; y/3arcbk4 *sl8cz ympare?

  The length of a wire is doubled and the radius is doubled. By wha dm 1m,/hvq w/oxr+j,dt factor does the resistancxmd,1d+/mjv, rhoq w/ e change?

  How much more resistance does a 1.0 cm diameter rod have compared to a 2.0 3m8j(si7 9d r/ lvbexpn;y/zrcm diameter rod of the same length and made of the e9dyrpn//3sr7 xjm ;i8( lz bvsame material?

  The resistivity of most common metalsk 2hl* q (o)(t7bzxglc

  Negative temperature 88yd fr hw*xdp z,u28lcoefficients of resistivity

  What is 1 W equivalent to?;z2c5 +eix zgjblwh)7

  A kilowatt-hour is equiv/ da4ww* d,dphalent to

  If the resistance in a constant voltage circuit is dav,ubttr 2;/eo- 6uuioubled, the power dissipated bvae2ort6tuuu; i b/,-y that circuit will

  If the voltage across a circuit of cga - zrb7d:m*yt:,ruzonstant resistance is doubled, the power dissipg:bd7 tuyr ,-:r*m azzated by that circuit will

  If the resistance in a circuiq3x9qv;hi7di he1a.) ito2fjt with constant current flowing is doubled, the power dissipated by that circuit willv1x 7)9ijdiq;.2haef ho tiq3

  If the current flowing through a circuit of constant resistance is doubled, th f 7i1u y3)ei gi2s.iq,mys7ml,0l whqe g7 yfy 7mqqs.3iiu1 ) ime,s,lh0il2wpower dissipated by that circuit will

  During a power demanff d.p:/ sy2j0yq8 bye+;stf md, the voltage output is reduced by 5.0%. By what percentage is thsf8y2e t0/fbjf: y+s.pm qdy;e power on a resistor affected?

  A current that is sinusoidal with respect t )b e i/:wvi+lvsz-6nho time is referred to as

  Consider two copper wires each carrying a curre 3d(3k0g yq/gk gshcgi r;1j6e)wwk v2nt of 3.0 A. One wire has twice the diameter of the other. The ratio of the drift velocity in the smaller diameter wire t 3v30ewwg 1k6jd(q2k rgy;gihk gsc/)o that in the larger diameter wire is

  Materials in which the resistivity becow6mu+j77d pgfmes essentially zero at very low temperatures areu7jwf gm 7p+6d referred to as

  What current is flowing iv 8 nx3m xx(k jld(w0-- *sb+5vnaphpwf 0.67 C of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus in 2.0 min. wkxw3dza99l2mzc xn; /;s,yz What is the nx9, ;2ca9xdwz;mlzs ykw3/zaverage current?

  How much charge must pass 9slp8ry : pxe2d- .wezby a point in 10 s for the current 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 flowin6-bdt jyche((8keqlcy l(tf1jj .a 49 g 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 curre2h+eo1 ncpi9)i +iqlw nt, has been left on for 10 min. What is the net number of electrons that have passed through the coffee makeniciw q+i +p9h)oe12lr?

  In an electroplating process, ik /gd7he98 ok;e gsbjyf02q9yt is desired to deposit 40 mg of silver on a metal part by using a current of 2.0 A. How long must 8eko02 q9eg7;/yh sfkdygjb9the 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 cauv;t1 nm+itfk9;5w.xkvpx7mm: 7c l l dse 4.00 A to flow through a resistance ofl l9t5mm77mvc. n+w;kf1kx pvxi td:; 330 W?

  What is the voltage across a 5.0-W resisa(sxmme u*o95k 9kg ybk i+4p,tor if the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. Whaqnw 2; fh16lhbt current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its resisto/ 0/ agu:1xgngd2; xj dpra(rance?: 0d 2rugaj gp;dxra//1o nx(g

  A 12-V battery is connected to a 100-W resistor. How many eb f e7p(q:cn8 eu/*ku ise0xt,lectrons flow throughe(0te *i7u/:, fn ckbxqs8eup the wire in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0.40 iu(z:f.k 2rvu -kj.nf lnch? (The resistivity of colvr2knjff- :. uu zk.(pper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of aujx qxm o;ne9 dg,x54rj 964hg circular rod 1.0 cm in diameter and 45 m long, if the resistiv5 9xrh;moex 96nqxgujjg4, d 4ity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (wi p: qv79o7dq;nh dm.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 (resistivity(z7k vn2x(ja4mg m es/ $1.68 \times 10^{-8} \; \Omega \cdot m$) 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?e0 2( osy2idci

  Calculate the current through a 10.0-m long 22 gauge (the radbhzemqvwv2 x;e5 ,v 90oikpjry0k+f,( n.2swius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. (Th 0xnb2 ve+.zvpj o 50wr29ve,s i,fwkhy(q;mke resistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 c6nnu uh ;c,p*km long and of rectangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carri6k nc,p;nuh* ues 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 of 0.50 mm and a fyi0o-ts zw/go3 6 m3gresistivity 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 (resistivn b) t2t(k/u fc7ufub6ity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a dyei 8f+ 4bz0aresistance 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 coefficienc8j:4v-quxum ( - ukspfwi -zq/i 2v7at 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 point of indium. Thexrfe : vpl/5ess16z3c resistance of the platinum wsx/pv 1rl:ezce635sfire 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 throu1 y46oiinwn l3n tl9a+gh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What c2iw1p.e /aopo xx(ht ,urrent will it draw?

  A 150-W light bulb running on 110 V draws how muu8j;g/j/fx7t-xx 1jkc)c ippch current?

  What is the nominal resistance of a 100-W lightp591i1pjd9p w8urq nm bulb designed to be used in a 120-V circuit1 jpm9p8 qpnid1 w5ru9?

  A toaster is rated 800 W at 120 V. What is the r:jc34b4vj7 heh/* :x b yahcxqesistance of its heating element?hhx jve*ab:4:c3xhjq/ 7 4byc

  A 200-W resistor is ratedt/e)w ;pv1 q;x9npfmh5j u, ax at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated e(8yocz wncne: - 9qz zq929lbat $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what current zx n*1 ()s.o5clbr 4izfyy jv7does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what2-brfl-kmu .e:01 skr m,sdb y is its resistance?

  A 25-W soldering iron runs on 110 V. What is it(b4 9javxyi g9vc6edfbf*+mt3*4ezys resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 houq ,rny,z;gp:d rs, if energy costs dqp gy:r,zn ,;$0.08/kWh?

  How much energy does a 100-W light bulb use in 8.s)7f/viu x (mqa: blpd/y :.xl0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How muchs/iixpz bgd 3-a l6e2; heat energy is produlzes 3da p6-;/b2gxi iced?

  A battery is rated at 12 V and 160 A-h.9(x1ankne7 (; exasbm How much energy does the battery store?b 7 x 1e(asmxkn;nae9(

  How much energy does a 25-W soldering iron use in nb:)ce)s 6 o*vwbhln 38.0 hours?

  A 100-W driveway light bulzn (a1c 2*r; /ay l/a /ehmz;+jvhxxubb is on 10 hours per day. Assuming the power company charges 10 cents for each kilowatt-hour of elec2 uzb(/ a;e/jhyaxmn1 rlvahx;+zc/*tricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (coy m 8 p6p/rka-rihtv1l7v*+sg mputer plus monitor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to run the computer1galkpt/i7r+v *p- sm86 yhvr annually?

  The monthly (30 days) electric bill included the cost of running a central airtxd ; m9kzi++c wwy p6yvld5k +k*ni(.-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 cont;pk dwi9 6vy+5 yitzkc*n+l w+. (mdxkribute 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 generatestzc.oy-v 1q+9l;p r2afnw0 gu heat at the rate of 2.1 kW. The heating element shorts out and, in rac ogy.+2v;9t0pnqwu1 -flr zepairing 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 will the repair have on the power dissipated in the heating element?

  14 A of current flows thr xfy 6m mwhniyq4c)/;:+q8 dbiough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs ii+(c *8 cj 6maze:axa$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. mvxjna3 l:n lr1:nv7k8fjk4vk,*8nu How much current does it draw n1vlj::funnkxr438 jm vavkn l,k8*7from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac powetw hjem 9c)8dx3*+/cgdpj5 der source. What rms current flows through pj m9xjc ge*h/ddwd58c+te3) this device?

  A 500-W device is connected to a 120-V ac power source. What peak cuy-ua 5w6urg gr+v-c bir ;z:.srrent flows tsz5ubiu -g:. ;rvc +-yrgarw6hrough this device?

  A 500-W device is con./ u9zw: kh s8 imi,l5big3e xnp5n9jknected to a 120-V ac power source. What is the peak voltage across t3:g p9nhj nke l u z8s5wk9i,mib/i5x.his device?

  The diameter of a copper wire is 0.081 inch. +b5-htiyuui n+ ,dsu1 The maximum safe current it can carry (in order to prevent fire danger in building construction) isnit+hs u5,d+ui-b y u1 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 $8.5 \times 10^{22}$.)