A device that produces electricity by transformi*o wo7n 4f;5twe8o kjyng chemical energy into electrical energy ij; on*eoyw4t ow78kf 5s called a

  A car battery

  The total amount of charge that passes through a wire's full cross xnyek mp6 ux+)rk* ;,bsection at any point per unit of time is r +ex) rxmp*y6kku, n;beferred to as

  The direction of convention current is taken to be the direction tcc i p*/5ycfb14 goqf-hat

  A coulomb per second is th s8i5sii3:zmxe same as

  Car batteries are rated in "amp-hours." Thisap5od-,)tc eou .vn3f is a measure of their

  The resistance of a wire is defined asa;.5l cs u+nb i/:q8fht)zzpb

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

  The resistance of a wire fsk9 4o6c:)mn pngch*fjq;+z /yt dc( is

  The resistivity of a wiw7w.t vipvpr2r dn ,awk; 6z -kzr+))cre depends on

  Which conducting material has the lowest r(83(a dz4sfz)visgi etbcv1:esistivity value?

  Consider two copper wires. One has twice the length of the other. How do the / g(sr :fvtfei;r: +gv zj5*6xvx(l rdresistivitievv xg 6j/r5(g+ ertfr;d: i (s:fl*xvzs of these two wires compare?

  Consider two copper wi l9u;bwf gz-jo-u* pd9.frxx8res. One has twice the length of the other. How do the resistances of these two wires compare? jx.b9fdgo;f-*u- zp8ulx wr 9

  Consider two copper wires. One has twice the cross-sectiona5,m6/d . oj1tdndyd vq2r.;jy vprcj0l area of the other. How do thdt jjqc vn/,m;ryvydo p625r d..01d je resistances of these two wires compare?

  Consider two copper wires. One has twice the length and twice the cross-sectivmr qn-9tn; j e)91 wv,b2jbatonal area of the other. How do the resistances of these twba- nnmqr )w,;b 9jtvt9je2v1o wires compare?

  The length of a wire is dou oxzk*g; yu-;:*)xl*soqrc tfbled and the radius is doubled. By what factor does the resio;t qx* r)o;f g:xcl u-*k*yszstance change?

  How much more resistance does a 1.0 cm diameter rod havekgccsg1 uac+,-d5 t )q compared to a 2.0 cm diameter rod of the same length and made of the same materi su1,kac g5g-td )+ccqal?

  The resistivity of most common meto8ns7h t(w lg 1.wt)h/d. tjyvals

  Negative temperature coefficientsk+cv+il9p1/+xio8t zou 5qh i of resistivity

  What is 1 W equivalent to1ke zs:h)t8 jpp*ykl5?

  A kilowatt-hour is equivayry 1z+3mdq f-lent to

  If the resistance in a constant voltage circuit iz;zi+)vspx uqqqcoz6 60)a7jc 3, gdys doubled, the power dissipated by that circui6q3v +qa)ug7zqcx )ip0d zj,c soz y;6t will

  If the voltage across a circuit of constant resista6 jo9xpcx1; hycvb)7*r qd (9d:nizrsnce is doubled, the power dissipated byc*yj1r h9i9d: vz6 porx sx);(b7n cdq that circuit will

  If the resistance in a circuit wiz5s; 4 vygah-kth constant current flowing is doubled, the powerv-; gakzs y5h4 dissipated by that circuit will

  If the current flowing through a circuit of constant respbt gs1 9 r3n:pp;b 6glg7w:cuistance is doubled, the power dissipated by thas 7lg:cpbr3b:9 1pngg 6u;tpwt circuit will

  During a power demand, the voltage output is rfl: z1t/mg z6aeduced by 5.0%. By what percentage is the power on a resistm /1 :g6tazzlfor affected?

  A current that is sinusoidr wo 2ek3i :c0f,1m97oda)xni0befjlal with respect to time is referred to as

  Consider two copper wires each carrying a current of 3.0 A. One wire has twice sa,foklz;i 2-vj m)yoqv; m16the diameter of the other. The ratio of the drift velocity in ky2 )maq;v- ;loi fo6vjzm,1sthe smaller diameter wire to that in the larger diameter wire is

  Materials in which t* a: unow;je5phe resistivity becomes essentially zero at very low temperatures are refpoe u5jnw *a:;erred to as

  What current is flowing if 0.67 C/ryct1g i 3zy.r3d r6u of charge pass a point in 0.30 s?

  A charge of 12 C passes through an a l8b1ghi7vt9 electroplating apparatus in 2.0 min. What is the 1bl 789ti hgavaverage current?

  How much charge must pass by a point in 10 s for the current to be 0.50 A5jfc0 k-8v9hgepd z1h?

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

  What current is flow 1)a0:ujgnmu oing 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 leftsl *mje8q i3d(dgrf w-t5p;x8 on for 10 min. What is the net number of electrond-r istlj3 8e;(gqpx8m w*f5d s that have passed through the coffee maker?

  In an electroplating p7q d5u(ho 6cp*tn 6 ;l*xudlzsn 0bj5mrocess, it is desired to deposit 40 mg of silver on a metal part by using a current of 2.0 A. How long must the current be allowed to run to deposit thx0t 6od *zn*njp6(5 5ldb7u;cumhsl qis much silver? (The silver ions are singly charged, and the atomic weight of silver is 108.)

  What potential difference iwk*- q/y*w iqrs required to cause 4.00 A to flow through a resistance of 330 -*/ yqrw wiq*kW?

  What is the voltage across a 5.0-W resistor if the current through it is 53 -vi-+cefd d h-ejof3.0 A?

  A 4000-W resistor is connected across 220 V. What cx q n, vvuly3z65(s8s5 j:yywhurrent will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its resizr3jiy*7;h udt 9r2uzno;l m2stance?uyur7dhlom*t ;2zn9 ir3;2z j

  A 12-V battery is connected to a 1f+cyad0f4 ;o x00-W resistor. How many electrons flow throughxocf d+4 fay;0 the wire in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0 np 60+n(lo a+ yii+hl1qebfb ,b(vi5e.40 inch? (The resistivitybih+ ne+lbbiy ( ,1 (v5e+ip qfla0no6 of 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 qsv,cz9a:f m ;long, if th:9m,s ca qzv;fe resistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wrk; bj ( uktjfg09h)q2ire (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 (remm afihmff*7 993ipo)sistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) 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. Wha,)0lyne k,l :kvl sr7mt is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge (the radius ihp7)-u c8f 8ggx bt7gss 0.321 mm) nichrome wire ig7guf b-7cp)hsgt x88 f 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 rect)uzpb,s-gw+d angular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carries 4000 A? (The resistivity of )wb g+szp-du, copper is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichrome wire has a radius of 0.50 mctv wy*s.dx8gka; .p. m 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 wih4a7bmw5l.z mn0x35iojxg , h9 (rolk re (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 res: ;51r3 cpsauo4 m89mfvx ncaxistance 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 resist26o8ubtrnv n u/:mm *eivity 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 porgn vd;lo)y w(+8mx(g k7gm8n int of indium. The resistance of the platinum (8glmv o7gkx( n+; 8)y dnrgwmwire 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.hlukq0 a hz/ izs6 q*dk:y,*ough an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at m-tq,rcw 32mt1200 W. What current will it draw?

  A 150-W light bulb running on 110 V draws how muchxo;z;tfyb* 0v nt 39 3op6eadr current?

  What is the nominal resistance of a 100-i.-),egqik eo W light bulb designed to be used in a 120-V circui oe).ie ik,g-qt?

  A toaster is rated 800 W at 120 V. What is the pb;cre +x8-o. 8sbj llresistance of its heating elementb -;8rp8el cj.so xbl+?

  A 200-W resistor is ratafwo,;fkggf+ j **c c)ed at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ratcd*f ox-2tj n 6/4b-bggiwn s.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 currentnl 0fnic* -l/shb qhr2c/:5ui does it draw?

  A lamp uses a 150-W rsbo2p6ug4w wgr6 /m 9 z7*umlbulb. If it is used at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What is its zkpf v6,pq7p6resistance?

  How much does it cost to operate a 2xdz,cpa9n,a 0fj s8 p1dun7o( 5-W soldering iron for 8.0 hours, if energy coo j7 f n9,cupansd,padz8(x01sts $0.08/kWh?

  How much energy does a 100-W light bulb use in 8.0 hours bfghg7): 8eyz?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much heatjb:p,;h uva)n,4gy *njtek.r 4be/ew energyjnp:,wk ) rb/.,jahg n4tuyb*ee4e; v is produced?

  A battery is rated at 12 V and 160 A-h. How much energy does the pi.txs.fvaq* bm z-2l f ,w.2qbattery store?b2vxmzwsfflpqa *.-q .2.i t ,

  How much energy does a 25-W soldering iron use in 8.))f8c how2* j yul1tcr0 hours?

  A 100-W driveway light bulb is on 10 hpo e(mn*ub7 ne3 3k.ihours per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate the bulb.73mo.k (eie3*pu bh nn

  A 400-W computer (compute -ep-k;f1e w9:bkdhan.c i m8tr plus monitor) is turned on 8.0 hours per day. If electricity kk8c-f;-mt hpi:9 a. w1e enbdcosts 10 cents per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electric bill iz neh,d(g w9e2)8aaft8r)xkfncluded the cost of running a central air-conditioning unit fon2w 8z )(fde ga)h8frtxka,9e r 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 an electric drit .xhma s- yql j;b41/diqov89er operates on 240 V and generates heat at the rate of 2.1 kW. The heatino1j hqq v as.x/l4;dmb8-t y9ig 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 depend on its temperature.) What effect will the repair have on the power dissipated in the heating element?

  14 A of current flows througl7;/ )i7 ay ogxfto4mxh $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costsoav e-vh4f c)4 $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 o ( 0rpu2z 08 o(fasxg sgq9jwn7g4+nl2.0 hp has 60% efficiency. How much current does it draw from a 120-V line?lagf 94(jz28nrss7(gox wgnu o0 q0+p ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power sourcx*5uf3qw w h46p-g lnqe. What rms current flows through th5-6fw g4* 3lnqwuxqphis device?

  A 500-W device is connected to a 120-V ac power source. What peak curreriz,aex e 0d0vw2)g1k nt flows through this dwdezg 1)akevxr 00,2 ievice?

  A 500-W device is cot1o0uu*d2f+waub:h -kz a1iinnected to a 120-V ac power source. What is the peak voltage k ai*dfz1w0ou1:a-+2 htb iuu across this device?

  The diameter of a copper wire is 0.081 inch. The maximum safe current;fw8l) 2cwp ka it can carry (in order to prevent fire danger in building construction) is 20 A. At this currel 8 wp2w;cafk)nt, what is the drift velocity of the electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)