A device that produces electricity by transformv(yd:- mqn3w) *wtm eaing chemical energy into electrical energy is calnaye(tw:mw3v*-m)q d led a

  A car battery

  The total amount of charge that passes through a wire's full cross sectionv6 /qkz-8.yebw)b uki at any point per unit of time is referred b-vb.68e/yq k ) zwuikto as

  The direction of convention current is taken to be the directv1nn9-bk5e saw9iz : g; ww/:v)*0jdrxekuyu ion that

  A coulomb per second is :a2j ohmzzm4u)s. s6 pthe same as

  Car batteries are rated in "amp-hours." This is a tyby9f:x eb;4 measure of their

  The resistance of a wire is defined asxi(.yh9ahu1s.ccmn z z2 zw0)

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

  The resistance of a fd1k,ydrv: hog,,i5 cgu -f2 gwire is

  The resistivity of a v 5qsp jgb:sh r6ul083wire depends on

  Which conducting material has* .te-x watsd.rhda)0 the lowest resistivity value?

  Consider two copper wires. One has twice the length of the ta.smhg6fu( a6me7q)other. How do the resistivities of these two wam)qt(a 7u.sf6h6m geires compare?

  Consider two copper wires. One hak l)+lqh* 4cdls twice the length of the other. How do the resistances of these tw )ld+q4l*kh clo wires compare?

  Consider two copper wir, brh(1v-lrqa+l dh6 aes. One has twice the cross-sectional area of the other. How do the resistances of these two wires compare?+ ,b6h-dqlr(rh 1vla a

  Consider two copper wires. One has twice the length and twice the c ihjcg;gy nu.a8i1ub+e1y j;7ross-sectional area of the other. How hj1;yn i.ua egc i78+;ybguj1 do the resistances of these two wires compare?

  The length of a wire is doubled and the radius is doubled. By what 0t+neho7kcz+ factor does the reszc +0eh7kto+nistance change?

  How much more resistance does a 1.0 cm diameter rod have compared to aex1gg hb/te 20vy7rxuk6+ne6z44z n a,y mj+p 2.0 cm diameter rod of the same length and made of the same materiamk vnet 464yebghayj r z, 1gx67en0+z2p+/xul?

  The resistivity of most common metabrl:l4z0te : p+u.b wj7rin/cls

  Negative temperature coefficients of resistivity3mqc 0*vn4bmdt2u z* a

  What is 1 W equivalen s7nq5ia19n bmt to?

  A kilowatt-hour is eq1j yxi*si ume)9oxmm7 nl9*)guivalent to

  If the resistance in a constant voltagefl fd.cfa3 y+* circuit is doubled, the power dissipated by that afdf. 3l *cyf+circuit will

  If the voltage across a circuit of constant resistance is; gtg jactb.n(::jea1 doubled, the power dissipated by that cirta:n1gj tb. a(g:je c;cuit will

  If the resistance in a circuit wilj.qk8t0*mt g *jrg- wt+xfy9th constant current flowing is doubled, the powg*rt0m*.x8lwj9y g -q+tfjkter dissipated by that circuit will

  If the current flowing;we. crtahi92-u( mx p through a circuit of constant resistance is doubled, the power dissipated by that circuimiw ;9-at preu hx(2c.t will

  During a power demand, the voltage output is reduced bg -c w;y(koj)tmy xq,8y 5.0%. By what percentage is,kyxw8ygt -m)(qc j; o the power on a resistor affected?

  A current that is sinusoidal with respect to time is referr-f jq;*qx qj5eed to as

  Consider two copper wires each fc:kwd :ra+ *h ajv:n.carrying a current of 3.0 A. One wire has twice the diameter of the other. The ratio of the drift velocity in the smaller diameter wire to that jh ankd*vrc::fa:.w+in the larger diameter wire is

  Materials in which the resistivity becomes essentially zero at viby0zmyl px1:+d +z-xbh.6 thery low temperatures are referred to adh- :+ty.6m +bih yp1 xx0blzzs

  What current is flowing if 0.67 (p+ls:n-qi:i3x *p b.gc ptzrC of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus in 2.dun7q( uehxwi a3eq, 1i5;dg)0 min. What is)i1d,qe n7xd h(;5wuauq e3gi the average current?

  How much charge must pass by a point in 10 s for the current to bed7 ka1yezn o. v.ltj23.y)me l 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 flowintik8fr s.a85gdp1lmiw71)4my9ljm 6 /asdq eg 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 b qtq2q nl4ebh 9/mua2/een left on for 10 min. What is the net number of electronsnqtme/a9 b/24hqlu2q that have passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg of silver on a tv)/re3bn +hjvq/f3a metal part by using a current of 2.0 A. How long must the current be allowed to run to deposit this much silver? (The sil / afv)t+h evbqjnr33/ver ions are singly charged, and the atomic weight of silver is 108.)

  What potential difference is1+f cmzk .a5sq required to cause 4.00 A to flow through a resistanc.ac15kszmqf + e of 330 W?

  What is the voltage across a 5.0-W resistorr+jyd bp b3*z 2vsl,0s if the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What current wdv (x8u1.g)f -mjonw mill flow?

  A light bulb operating at 110 V/735-8wnpbmr z giw vq draws 1.40 A of current. What is its resistancemw z pw83vig b5/r7-qn?

  A 12-V battery is connected e *ti*k.uch+5(c musy to a 100-W resistor. How many electrons flow through 5yec hi*m. u ustc+k*(the wire in
1.0 min?

  What is the resistance och 724q,6m ay2iveae( 3pseqnf 1.0 m copper wire of diameter 0.40 inch? (The resistivit3hmpvaae ny, e62 qqsei (24c7y of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a cdxq12fm vk 3ej 4(,sueircular rod 1.0 cm in diameter and 45 m long, if the1mxf,de3ev qu2(kj 4 s resistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resistivixbsmg 1tbxh5tm: :a, )ty $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (resistivzwq 97xx9fchzc k,93vity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 bewn22rpn))f(eq 9uf m long, measures 0.040 ohms. What is its resistivity?

  Calculate the current through a 10.0-m ldyog2o78 * 2fvanfn +long 22 gauge (the radius is 0.321 mm) nio+v7yd oa 8flfn2*ng2chrome wire if 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 ofpbkazwq88b; oo 7 )j)5o4najltd*l:u rectangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carries 4bnl*l)oqd :j7)5wo zaj8;b 8u 4t kpao000 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 resistivitrdme )*qtb:nxx 9a11 /b61lj tr vuua.y 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 coppbe+p yni / 229ya0g(soiok/jfer wire (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 resistance bd xo*q haf3)).,bfxfof $18 \Omega$ 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 coefficient8xen wum;dfxs n5o, f6 2ux.s7 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 thbul-fiw; p/x/t fc18 .qz7y;d j0e/ :gcraqjy e melting point of indium. The resistance of the plati r7ewi 0cx/1zly/dp:bftq/uayj. qgcf-; 8j; num 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 through a wa-yttt h1qb.p3+rb +n $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current will gmcw2g4 j:z5c it draw?

  A 150-W light bulb running h*rnrk;ub3 d/gyxj)ub n on q(a*)v18 on 110 V draws how much current?

  What is the nominal resistance of a 100-W light bulb designed to be,a gu9d7 dra7jy*)jkb used in a 120-V circuigrbuy 7d a*79d)j, kjat?

  A toaster is rated 800 W at 120 V. What is th q+5s(buhzwiq8f8d a. e resistance of its heating element8f5d+a hu zsi8q b.w(q?

  A 200-W resistor is ratecw 39sw-yuds6un 9u 3ud at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rate5-ttec44 svek d at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what culq*)hrt az5 l5rrent does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is its retec bwu.- jw,yn oxx5itm6 :,3sistance?

  A 25-W soldering iron runs on 110 V. What is its resista8jz/3p. pn vdwa6-wb t-kf f.tnce?

  How much does it cost to operate a 25-W soldering iron for 8.0 hoz(wry b/epm5,1 ec b+ * goxsmac,);cyurs, if energy )ory*s z( gxypce,c/ m1w baem5, cb;+costs $0.08/kWh?

  How much energy does ax0 +w bnlcy8w5 100-W light bulb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much heat enmv1 gzki(qs:c.iwn0f9 . svw3 ergy is producedcv9kw(m.3 ig:ifw. zns 10sqv?

  A battery is rated atio) 49c*r)c hhtua-s n 12 V and 160 A-h. How much energy does the battery store?ut-hn *so4cra hi9)c )

  How much energy does a 25-W soldering iron;ha.r7a uh j t pc5b7nxx,xm08 use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming the power compfa9spt;) +avecx(b)/ n:y //s0 :sdfrw whxdaany charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate th/9;r f/d hs/wsa+ daapfet0xv n )yxwb):c:(se bulb.

  A 400-W computer (computer plus monitor) is turngxo /)o nk,z9gh3b*rjed on 8.0 hours per day. If electricity costs 10 cents per kWh,3)o/ rzjhg, x9onb* gk how much does it cost to run the computer annually?

  The monthly (30 days) electric bill included the cost of running a ux;y.1v 4x rpocentral 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 contribute to uv;1rox p.y4xthe 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 genc 55ofzg-jk/kbfik 8 1erates 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 r5/1koizgck58kbf - fjeality, 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 throughc 2z)skg 3o4uv $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costeb1i.*/o ,iia-z og yts $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 he g-90kis ,(3eed e/0vbe; jk8pwe 8lihl7yesp has 60% efficiency. How much current does it draw from a 120-V line? l8 3b0v e0ieeiks/98;eeypd -(hswjee k7 gl, ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac pout)9kuwm 0*gl wer source. What rms current flows through this devic0kw9)u gmul*t e?

  A 500-W device is connected to a 120-V ac power source. What peak curj-*g l5 8hg+jkcflw e;rent flows through this dev8l+j-5hwej;gl f *kgc ice?

  A 500-W device is connected to a 120-V ac power source. What ,nks(. (j m7 lpntbz74okd1y wis the peak voltage across this ds 4b,z7t(y7kpk.dm ln(o 1jnwevice?

  The diameter of a copper wire is 0.081 inch. The maximum safe current it can caa7ubz h*t ,x*grry (in order to prevent fire danger in building construction) is 20 A. At this cuzh7 **t,xag burrent, what is the drift velocity of the electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)