A device that produces electricity by transformin 3..nqiba a9kmb,h1 utg chemical energy into electrical energy1kq3 ba9b,i tamhnu.. is called a

  A car battery

  The total amount of charge that passes through a wire's full cross sec/ mz2,-ie tiention at any point per unit of time i mi-2e,iten/zs referred to as

  The direction of convention c:y smbkq0 ,(lqurrent is taken to be the direction that

  A coulomb per second w 9:;gp ucdpafkha)(9is the same as

  Car batteries are rated in "amp-hours." This is a meas xq15yj1 fvc*z)m mcv:ure of their

  The resistance of a wire,(ehj8azgy jok8 v6*y+6t rxe is defined as

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

  The resistance of a wire ish5e rapq-n*jv v :wm+4

  The resistivity of a wd8lq5 *u-35d 9 je)gf rie.lzkqtx7s vire depends on

  Which conducting material has the lowest resistivit/9*osmeiqhi 3mr/(t2 xxpv1x y value?

  Consider two copper wire,2 2m(cnggfpcc,4gfk s. One has twice the length of the other. How do the resistivities ng, pf, (4 gmcc2c2fkgof these two wires compare?

  Consider two copper wires. **q/2q: vmj/hh p v*gcdbp(b z One has twice the length of the other. How do the resistances of thghvd pq *2mq*cb(/h:j/zbp*v ese two wires compare?

  Consider two copper wires. One has twice the qu0qmpip g-8and* f./ cross-sectional area of the other. How do the resistaq-ua nf/* 0impg8.qdp nces of these two wires compare?

  Consider two copper wires. One has twice the lengcfagw :ts 76pa(t28hymh7ej 6th and twice the cross-sectional area of the other. How do the resistances of these t7 (gewy8ap276j t6a:mt hchsfwo wires compare?

  The length of a wire is doubled and the radius is dou lq kmf.ye()q)/l68 -n5edgh)j xndpn bled. By what factor does t.n) h-en8 (k6yqme))xg5/ dplnlf dq jhe resistance change?

  How much more resistance does a 1.0 cm diameter rod have compared to a 2.0 cm dit+( 0xs(ob: z4uypzp -;cyslyameter cx(+4z ;zs(ylstpu y 0bop:-yrod of the same length and made of the same material?

  The resistivity of most cocgkc(k8j1wpc 3 b5ph .mmon metals

  Negative temperature coefficf81:al3j vqb y-aqf x9ients of resistivity

  What is 1 W equivalent tow8ro5 0uyw7a :ffi d2k?

  A kilowatt-hour is equivalen5qk.i 4w u1dgat to

  If the resistance in a constant voltage circuit is doubled, the oa7f,n1aap, 2f:cph opower dissipated by that circuit o pn,,ca:f1 pf27oaah will

  If the voltage across a circuit of constant resistance is doubled, the power dis5pyddn.qw *x 123so kbg06tlnsipated by that cirnx* 2 q .5ks3tn1glboywpd06dcuit will

  If the resistance in a circuit with constant curren5dg : eyom.mp/t flowing is doubled, the power dissipated by that ciry:d ogme. p/m5cuit will

  If the current flowing through a circuit of0wl2:gn u8f ;3.n*kb/d2u ftazsdbyl constant resistance is doubled, the power dissipatd3bdk:as * fzl./bu; tn0 8l2wny 2ugfed by that circuit will

  During a power demand, the voltage output is re;2e0fmuol he3od2 fb5duced by 5.0%. By what percentage is the power on a resistor affect;l2 oof53hue 0bfd e2med?

  A current that is sinusoidal with respect to time is refj,:eu-v4az 4o4ww gzk erred to as

  Consider two copper wir -pg+o llxdaa+,,yy*n eumn w-r .c;q,es each carrying a current of 3.0 A. One wire has twice the diameter of the other. The+gn*; lo u,-wpxyl,.c+ya,a-reqm d n ratio of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomes essenti h n1q)nl1 ql0hf,si)bally zero at very low temperaturen lbh),1isq) q1l hnf0s are referred to as

  What current is flowing if 0.6mq-lhq)hxg e,,, z;tc 7 C of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus in 2.0 min. y/lor ca6,mn( xps)l 7What is the average curx/ r7mlo6 laspc,yn()rent?

  How much charge must pass by a point in 10e z/g(v;ta,nao,; x 7 ilefrxao(;,t v 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 flowing if e *zokb8 t4) 68b ajw-b .r6bnxtinqm)$4.0 \times 10^{16} \; electrons$ 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 fov9hge yvq 9+n6+vmjo(r 10 min. What is the net number of electrons that have passed th(+ ymqh99+v gevv6jo nrough the coffee maker?

  In an electroplatingfnb; dwv+wpzq(,1d 5q-a8b/-r jru5mot ;bq a process, 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 this much owq f;b5pbu, 1/qt- bmr(+8n5wrajavq zdd;- 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 throu8rh eh4ky-vkr- e 4n/ngh a resistance of 3 4hyn khekvrn8--/e r430 W?

  What is the voltage across a 5.0-W resistor if the current through it is 5.0 A?5 s7be iuovwn: 8jz8,r

  A 4000-W resistor is connected across 220 V. Whathk .y6ig le7 u0/emlt.vm-i .y current will flow?

  A light bulb operating at 110 V draws 1.40 A of cur:8 78tss 0zkb*ju3+ a-nilnbw4znnyd rent. What is its resistance?-njt4n*70yb +nisl3zsn: d8zab8wku

  A 12-V battery is connected to8alc0a slb)frp()a9p 2 bgs5vp6ff r3 a 100-W resistor. How many electrons flow through the s )8a2a par p(0l)pf vrlgc 5369ffbbswire in
1.0 min?

  What is the resistance of 1.v6nb6sc-wji5q w/j n .0 m copper wire of diameter 0.40 inch? (The resistivity wi-6s 5b/6cnq.nj jwv of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circul(z -t2w il(trjar rod 1.0 cm in diameter and 45 m long, if the resistivity2tiwlzt(( jr - is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wi2ez.kw:ok emet i5 (1b(f qxa/re (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 (resistivitm .qirs pxf*7.y $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 itq; (6es+b5dbfbixv2p s resistivity?

  Calculate the current through a 10.0-m long 22 gauge (the radius is 0.321z;vp6ufq 63xw mm) nichrome wire if ;6ufqxp wz63vit 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 z:ruk fp cj+8*cm x 2.0 cm. What is the voltage drop along its length when it carries 4000 A? (+ 8p*zfrc:u kjThe 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 resistivity:7bo jkwd*i2n70jmqa r8xk 5u 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 wiw /ktta f*bjcbu3 )2q/2sv 3cnbj(cc+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 rew ;f+s.b55 rsquy ju.rsistance 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 of platinum ish kyr*r3)ft ;s *2rhwy $3.9 \times 10^{-3} /^{\circ}C$. 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 det j2 25s7ndwvemermine the melting point of indium. The resistance of the platd7v2ws5mj 2n einum 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 throug+m be;jjbahxe 68p34gh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 * v6k efpl7kw))7tnkh W. What current will it draw?

  A 150-W light bulb running on 110 V draws hh2n* y5rs, ivaef n. wir*3lq8 3bvc8eow much current?

  What is the nominal rejz4mbgk eks5 7cec0cse 33 3e2sistance of a 100-W light bulb designed to be used in a 120-V circuieck3gbe7e332s5 c k04sj czmet?

  A toaster is rated 800 W at 120ubo/pn 3c:p5z4g0ssw V. What is the resistance of its heating elementp 3o ubsw/n:c4 s5z0gp?

  A 200-W resistor is tr*ax0ru plei sa+96d2vcu +16rqr1 arated at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated ah 6k)i+x,*f0n8tem+ar hhudmt $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W blr i (z(5tl)gmulb. If it is used at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is it.6zi/yqywv, fpot:e9s resistance?

  A 25-W soldering iron runs on 110 Vn )qgpmp7 w*1f. What is its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 +fqkguq 8 ;j/lhours, if energy /+qq;ugjfk8lcosts $0.08/kWh?

  How much energy does a 100-W light bulb usfx5groy :y6i /e in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. Hfb).tn 0 a,rdaow much heat energy )rat.n0f, adb is produced?

  A battery is rated at 12 V and 160 A-h. Hzf,.mob0pi7 lzu s-(dedt. d8a)sx )aow much energy does the battery store? e.s,zf)7m8xdoi-p (dsbat zl.a0)d u

  How much energy does a 25-W soldering iroa+eaq2 68:-xtpjb oky n use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming the p7x i g44 -u;fln*htthwower company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate u74h-* i ;4hgxtfntwl the bulb.

  A 400-W computer (computer plus monitor) is tu g2ab +qy2:zmbrned on 8.0 hours per day. If electricity costs 10 cents per kWh, how +yabz2:2gq bmmuch does it cost to run the computer annually?

  The monthly (30 days) electric bill included the cost of runnia4 y;jv(-tol:lzg x*ing a central air-conditioning unit for 2.0 hr/day at 5000 W, and a series connection of ten 60 W light bulbs for 54 *allijg;t -(v x:ozy.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 e 7a x t*z yerrjiimn73m9c8(8an electric drier operates on 240 V and generates heat at the rate of 2.1 kW. The heating element shorts out and, in repairingjerri39c zt yn877x * amemi(8 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 throughbq8a-5sbza;20 z obly $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery cost d asj-em1m7 yd(:c*jes $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. Howdbw8y jhikeszs*q/n8 qma+.vot 7- /3 much current does it drk 7/ .-y zi/nqs3boet8hda+j qvmws*8aw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rms cl bps; h4++lruurrent flows through this devicr;ub +ll4 +hspe?

  A 500-W device is connected to a 120-V ac power source. What peak o;.5 zw9u(1yl*hgfchdl n)ue current flows through thiul)1 n .uw*c9;y h (edlgz5fhos device?

  A 500-W device is connected to a 120-V ifxkm, 33wl s mek1 (z:4lx-kqac power source. What is the peak voltagemwi4e 3ml-xx(qsz k1klk:3f, across this device?

  The diameter of a copper wire is 0.081 inch. The maximum safe current b -( fp4z/ i9 0z6g ; wqriyrgegr786o3etdvkxit can carry (in order to prevent fire danger in building construction) is 20 A. At this currenex4ibz frt7k;z-gp/ r6iyqw6 v( 0go e 3dg89rt, what is the drift velocity of the electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)