A device that produces electricity by transforming chemidiyuy5b t+w0/c(y qq; cal energy into electrical energy is cy wty(+d/0;ibcyq5u qalled a

  A car battery

  The total amount of charge that passes thriji 1d5ftp y.q/:hvo1fxx,o8 ough a wire's full cross section at any point per unit of to/yh.fx jd5f :,ovp18i 1tqxiime is referred to as

  The direction of convention current is 4ez-xk*ksm o,taken to be the direction that

  A coulomb per second is the same,pv j .pd-*xmf as

  Car batteries are ra5ckyw ij5h o-)3moh b6ted in "amp-hours." This is a measure of their

  The resistance of a wire is defined aw9 p*, bzv5vcf;t e3bes

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

  The resistance of a wire isudul+cgq*-8q

  The resistivity of a wire depefh w56uke g0l2nds on

  Which conducting material has the lowest resistivity value?y .nglddo +z;z (s;2ze

  Consider two copper wires. One has twice the lenbj/ecue0f z0.i mq p.2gth of the other. How do the resistie..e z0u0qfi c2bj /pmvities of these two wires compare?

  Consider two copper wires. One has twi(8 x,ise m u-(ezlw/vrce the length of the other. How do the resistances of thes(uz(/ xme8r, swvel- ie two wires compare?

  Consider two copper wires.n wx( e-k0)t(5fbjm4gqv w l-u One has twice the cross-sectional area of the other. How qxb u(0) ftmj 5nwg-ew(v-k4l do the resistances of these two wires compare?

  Consider two copper wires. One has twice the iev9-w ri4d(d odo*3dlength and twice the cross-sectional area owo3(d*dd 9ed4ri - ivof the other. How do the resistances of these two wires compare?

  The length of a wire is doubled and the radius is doubled. By whaktt 5ifz6,d.l co+/m ut factor does the resistance chang+,tt.6oiu/l d5cfk mz e?

  How much more resistance does a 1.0 cm diameter oasebd0hz0 ,5rod have compared to a 2.0 cm diameter rod of the same length and o0 sehab0d,5z made of the same material?

  The resistivity of most common meshs,s 3be bx93tals

  Negative temperature7i s2h*zter(+fl/ayy coefficients of resistivity

  What is 1 W equivalent to?ckjowe6;5e7t; w ri;r actxqd/( bv/ (

  A kilowatt-hour is equivalentv:a:)nw2l t zu to

  If the resistance in a wjzxl da3no2* 2:ez(/-vdgcjconstant voltage circuit is doubled, the power dissipated j(n z 3v2glcd /:dz2oj*axw-eby that circuit will

  If the voltage across a circuit of constant resi;d)zd rnt5u l.stance is doubled, the power dissipated budzl).nrd;t5 y that circuit will

  If the resistance in a circuit with constant current flowing is double m7eyp/5pa4t 3 id+x:kug ldo0d, the power dismui7+po/l5:ad g0ed3p 4xyk tsipated by that circuit will

  If the current flowing through a circuit of co+wu+h2w nk l 7g+; fteyqa z+6q(henz+nstant resistance is doubled, the power dissipated by that circuig6 ;++7 ef 2 zhu +akwlw(tnzqhny++eqt will

  During a power demand, the voltage output is reduced by 5.0%. By what percent04desvp .xyg4/w+ f tid36jt tage is the power on a resistor affectegsvtyjd e 436w4tf/p.i0 dx+ td?

  A current that is sinusoidal with respect to time is tu0q 81ai8q s-r-iu x /oveja1referred to as

  Consider two copper wires each carrying /4cvxc1h0t*sf 2e ;z qfk3re fa current of 3.0 A. One wire has twice t3/fh1cc4*f2vkrt zse0e;fx q he diameter of the other. The ratio of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becom+p4p .f 8joru7jnkv thza a34*es essentially zero at very low temperatures are referred t 8jap3nrf 7a+uvj*o4.4p kzhto as

  What current is flowing px,.7d;sak 6nnjy o2iif 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.ni vq o-t/x y93; (dkpjove.1u What is the average current( /1y3i -e; . ujxnqtvov9dpok?

  How much charge must pass by a point in 10 s for the current to be 0.ljhr49r*tyk- um6m9d50 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 7nrc 6(;h.xln 1k vcmcaef(3 bif $4.0 \times 10^{16} \; electrons$ 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 fore uo9)3-(esm. s6jm,hrids5-qdpfo r 10 min. What is the net number of electrons that hao.f s,)m6jerded hm-q r3 ou-s(5p9sive passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg of silver on a meta-kjbuq2p6(uw ::wpqs6be+/pjf + pe ul part by using a current of 2.0 A. How long must the current bu ujqebp +f u:2pwb+wj6q-k/(pe :sp6e 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 rd2sbaugw5e9 3 equired to cause 4.00 A to flow through a resistanceu3aw 59es dg2b of 330 W?

  What is the voltage acro bd41 luau6z.88labht)p qc7vv,obl 0ss a 5.0-W resistor if the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. Wl may,;ez*i 9 -dgj* 9agj(5tfi2hczthat current will flow?

  A light bulb operatinh9c1aorp 3 rx+1pw6w cg at 110 V draws 1.40 A of current. What is its resistance?6w hwx11cp3rcpo+ 9 ra

  A 12-V battery is connected to a 100-W re9n3h3fz) )knl :z ul; ukoixh)sistor. How many electrons flow through the wire iz)3i)ux l lu9zhk ;nnkh3)o:fn
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0.40 inch? )h.vx1(zb9/ohw7clf m ndvb2(The resistivity of copper is.flm)9z od b/vxbc whhv127(n $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circth qee-q:lk.8/ rir( wular rod 1.0 cm in diameter and 45 m long, if the.hqeertw l/( q-r8i:k resistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resistivit7 9ku*/iqhmw/( z5nwhm1iqam y $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (resis)3y ks,py3)rt mk7rp eif35skxjk g pa4(f7l1tivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 m long, measures 0.04q em0r-/5;of s lr1qdy0 ohms. What is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge (+v;7 mnixwvd6ze hc0(the radius is 0.321 mm) nichrome wire if i6 ch;di wz (exn7v+vm0t 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-sectioygevhb;h2 laio x 7 d.s;,(se m2wq,,en, 1.0 cm x 2.0 cm. What is the vhe7e vsa.ygdb,ilq;2 hem,2 ; ,o(ws xoltage drop along its length when it carries 4000 A? (The resistivity of copper is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nich2*i)vowm yv,a rome 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 wjnptxg40 hn0tfdb8 ,+ ire (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 of/r rpos,;c,bo $18 \Omega$ 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 plajl+--gl twi y 4ab1z2atinum 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 meltzm 4nw1rp+ 0bling point of indium. The resistance of thr0wnz1lb 4+mpe platinum 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 througv )rjmu3 )6ev7vztay /t 9r6lkh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 25 lcjng41tfy 1200 W. What current will it draw?

  A 150-W light bulb running on 110 V dre 9npfd;jh o9g5w.f:waws how much current?

  What is the nominal resistance of a 100-W light bulb designed to be used ing0s1gj*y r oxfe(-j: n a 120-V circ1 gr0*:s-g xjfjo (neyuit?

  A toaster is rated 800 W at 120 V. What is the resistance of i ur90*6w3ce- e f9jf0clexgpmts heating element?c-f9cf9rle 0*p 3 wmee6jg0ux

  A 200-W resistor is rated us6yjen9 )8nwxs kif g 6y+ o4x,p7q8vat $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated at xb 4v3 lay -drlz8rm4dc:f+k,$1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at qr s rlvi5v(7ghvpbc*s,e6.4 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is itso0cj,va.3 *eaqgcd- z resistance?

  A 25-W soldering iron runs on 110 V. What is (qc gctr1fe*wa 4 w5g6its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.ct. u-(0 mxwmpw+cby+bt+ b w)0 hours, if energy bmt(-pwy.bww+c+m ubt0 )c+ xcosts $0.08/kWh?

  How much energy does a 100-W light bulb usw9xua *u ds bj:yjjtp.tl(hfa0f; 1- +e in 8.0 hours?

  A 1500-W heater is connected to af6ybz+p4;6 wwzafn + m 120-V line for 2.0 hours. How much heat energy isf+ fp;4ym baww+ z66zn produced?

  A battery is rated at 12 V a5ea ,g n.fbly6(okem*nd 160 A-h. How much energy does the battery store?*.,nkb6(ymog el a5fe

  How much energy does a 25-W soldering iron use ip2xu9f tb95gyons, q7 n 8.0 hours?

  A 100-W driveway light bulb is on 10 hours p ;dr0-.vzmyj cer day. Assuming the power company charges 10 cents for each kilowatt-hour of electric y0zmcr;-.d jvity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned owr3:on2b6 )t iig9pnen 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to run the compiw629 o:n reit) gbpn3uter annually?

  The monthly (30 days) ei) dgau; 1lz bcx d3frac-by0)3:.lyqlectric bill included the cost of running a central air-conditioning unit for 2.0 hr/.3bf:0-yrx1zc dlbg d)yl3;ciq aau)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 akgr/tfo2w3i (6f r+ 6orn5gzs n electric drier operates on 240 V and generates heat at the rate of 2.1 kW. The heating element shorts out and,gnk z6tw s+(o /25rrg3f fir6o 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 throughl6o;7l( tgakv $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costd1 ughed99tm i4,nqr6s $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. How much c:pn:z (mao2 wlr;omp p .ec,:furrent does it draw ,ople. c;:ampz2m(npf:: wor from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power sourceojisd)0c ca:) h 93alh. What rms current flows through joca09il :h ch)a 3)sdthis device?

  A 500-W device is connected to a 120-V ac power sourcevwvtsci:3c7+3bl j 6l . What peak current flows through this devicc 73wi6ctjb :lv +vsl3e?

  A 500-W device is connected to a 120-V ac power sou8u:r1wtt t0;slnhr ) wrce. What is the peak voltage across this devih1u 0)8nwt twt;l rr:sce?

  The diameter of a copper wire v*vtoj x 72umn7j+e4egbg2 ,g is 0.081 inch. The maximum safe current it can carry (in ordere2 ,jumov 47+2gjvn x*t b7egg to prevent fire danger in building construction) is 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 $8.5 \times 10^{22}$.)