A device that produces electricity by tra9 u aeo+iqccmyan :q1m1)uj5- nsforming chemical energy into electrical energy is ca q i e y9mj15:coa-n+qmuc)u1alled a

  A car battery

  The total amount of charge that passes through a wire's full cross section at an(o1 d*z 1r5gkobh3pbc y point per unit of 5b*h 1(oodz 1b3r pckgtime is referred to as

  The direction of convention current is taken to be the directionxmpb.;t.1g e m that

  A coulomb per second r5 /0d8schnlpjar //40tbyz qs uf/4lis the same as

  Car batteries are rated in "amp-hours." This is a measure of theirn pvcv)vnyui8,8,h9 h

  The resistance of a wire is defij6a:+(r idzrxga.efye : w5 z9ned as

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

  The resistance of a vfzbu,-: 7 l5kmskea e0xsh19wire is

  The resistivity of a wire deg26i11zi e3f g8,e, hino*kjlm+zo h *9sjo lrpends on

  Which conducting material has the lowest resistis,az r/8m hz:bvity value?

  Consider two copper wires. One hasb5-den v**:lt msv:cf) zkgfy wg,3u7 twice the length of the other. How do the resistivities of these two wires csv 5l 3 fzy e**vcnk,wf -:7dmb:)tgguompare?

  Consider two copper wires. Onyx-0) twaceh ,e has twice the length of the other. How do the resat ),eywh-c x0istances of these two wires compare?

  Consider two copper wires. One has twice the cross-sectiont;nim 7 v(n9h/w( lg* fs6cw.w r-*9eorxrjlhal area of the other. How do the resistances of these . s*w6*9;n9r cm(v(xogl/eil w7htjf rrwhn -two wires compare?

  Consider two copper wir(2f ,za,nxdhpuz;1 gl7-infges. One has twice the length and twice the cross-sectional area of the -nn 2ugffda7 ,(p h1z;gl,ixz other. How do the resistances of these two wires compare?

  The length of a wire is doubled and the radius is doubled. By what factor doepp2o4g psa +hgg-0 l:qs the resistance changeao +ggphqg ps4:0l-p2?

  How much more resistance does a 1.0 cm diameter rod have compared to +-zt :/ynwtbe9vcl3 )k53 mlfb,dj 8hqxnh5 fa 2.0 cm diameter rod of the sab:yvcm/jehlb3w8z +n9xh3fd 5nl ,5 ft-)t qkme length and made of the same material?

  The resistivity of most common mepi2m8s 4d3uo vtals

  Negative temperature coefficients of resist lbh148 tqkre:ivity

  What is 1 W equivalent to2/wavbn u/ hg1?

  A kilowatt-hour is equivalent50loo(kh;o/wcus c;6u :jnq y to

  If the resistance in a k))db jb6wcz- nkcc:3 constant voltage circuit is doubled, the power dissipated by that circuit wilwb6-d )bnj3k) cc:kcz l

  If the voltage across a circuit of constant resistance is doubled, the p2h,bg hv3o ae2ower dissiphvg eh b,32oa2ated by that circuit will

  If the resistance in-;c3u k5w okam a circuit with constant current flowing is doubled, the power dissipated by that circuo 5c3kwku; m-ait will

  If the current flowing through a circuit of constantjqmr pj c -wf,b8t/u9e cbw733 resistance is doubled, the power disw7tj ccf erwj 338b b-,qp/9umsipated by that circuit will

  During a power demand, the voltage outpu-u-s ahqkhhf2-st n v tuk3+11t is reduced by 5.0%. By what percentage3- k2s 1+na-u h-huh1tfk tvsq is the power on a resistor affected?

  A current that is sinusoidal with resiz ehuyob:.44 qc3y jjwi6 5g(pect to time is referred to as

  Consider two copper wires each carrying a current of 3.0 A. )vb bnax-vktw((g8 ke-s .-ewOne wire has twice the diameter of the othvkbtnk-b 8-(g).vea s - x(ewwer. 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 6vlgh:(jk ko2es essentially zero at very low temperatures are referred to as(j lkg h2v:6ok

  What current is flowing if 0.67 C of charge pass a point in kz.b)xjjy xmw1: ffp9i1(e-h 0.30 s?

  A charge of 12 C passes through an electroplating apparatusw frr70/ wwo t+7ykfc*atb- 6e in 2.0 min. What is the*w7ct w/-wya roef 7+f06tkbr average current?

  How much charge must pass by a point in 10 s:v,fdtawfq ;u9z- l*m 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 t iw ;umb,p -n *q,gdy7u0juho/0-pzn$4.0 \times 10^{16} \; electrons$ 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, whicht k*fus90v rv -m(9iqq draws 13.5 A of current, has been left on for 10 min. What is the net number of electronmv-qt(9ik* urs qfv 09s that have passed through the coffee maker?

  In an electroplating p8z7 ,jzv7wcdfb (4flqrocess, 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 allow (7c bzfzjf7w vqd,48led 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 cause 4.00 A to flow through a cdu/0stp ;1t-3 cssbi resistance of 330 Wsts u3;i/-c bp1dcts0?

  What is the voltage across a 5d-a0 /urixwam; q4m z5.0-W resistor if the current through it is 5.0 A?

  A 4000-W resistor is connectx 0(py m8rtw;2s8k x)uiuijvce 7i- x,ed across 220 V. What current will flow?

  A light bulb operating at 110 V draws 1.40 A of curred28g 1/r88ap8nii 7iicwwjz (gu6i tunt. What is its resistance?81gtg78cir6dii( aj n/i2zi uwp8uw 8

  A 12-V battery is connected to a 100-W re iq0n*7 )qa m-guregec:jk/ l6sistor. How many electrons flow through the wire irl0nkqgm u/c -*qa 6:e7gej)in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0.40 inch? (The resiah;6fk c1.zxm stivity of ccz6m;.axh 1k fopper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diam cat. /sq3has58d:,zi ojcrlylu) z, +:v;xyveter and 45 m long, if the resisc:cyv)z qzhs /j doi;v ,3l:s.atu5 ry,lax+8tivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resistivi3tr,xo f7q1qs 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 (r/qt el7 o6ccd5esistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 resistivit,fal:x g 9+foky?

  Calculate the current through a 10.0-m long 22 gauge (the radius ih lxapgn,19+ ls 0.321 mm) nichrome wire if it is conn+l ,91glphx anected 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 regdm/ 4f ia c-ci:h;(p*i:lubj ctangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when -igc:c;*:u4 iaipf(b hm/jldit carries 4000 A? (The resistivity of copper is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichro(eu sxrh /n3jah* 4dt2me 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 copp c6mr/v gqu*snyy23;i3 le vk5er 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 resistancle /xl3. condr-epp0 3,ds5kte 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 resslj av)4 :wlu ;t6,jxq-6afdiqt e s)+istivity 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 ind ,sy.,pn:osp7,7zmy yv 5ohecium. The resistance of the platinum wirevpop., : hmzs ,e7ny yc75osy, 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 yr0+xwon s71oy/kj3c ugh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current will itx 4w6ozr87 eng*,dyoqo v6 f7w draw?

  A 150-W light bulb running on 110 V draws how muchtz i1( 8hf1fbb current?

  What is the nominal resist h2z87gebu(n:wx8eh0zif 9za ance of a 100-W light bulb designed to be used in a 120-V ciah9gb if zhz 7e208uewxn(:8z rcuit?

  A toaster is rated 800 W at 120 V. What isfzfa.p9a;6vsm xik2, b9zl4 k the resistance of its heating element4 bfk2 9;a.,fpzis9m6x zlak v?

  A 200-W resistor is 4ezvcsx+6vg1v24l 6 mstk q7z rated at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated,b3 s ks+ie fvsmks*,. at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what curgj51ynfeb6x. g e,cj;rent does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, whatua.o9b)zztpy9(qe1 z is its resistance?

  A 25-W soldering iron x+bqx922rb *;ib ajyku -x1fu runs on 110 V. What is its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours, if enec,n *k znzrgnpsb1 m5aen1l/-o 0i e95rgy cos/0o 1 nz a55kzc,9 b*nielpngn1- mrests $0.08/kWh?

  How much energy does a 100-W light bulb use :pie ,rn3302lz h /tyi*j vimoin 8.0 hours?

  A 1500-W heater is connected to a 120-V line fo3t+7vi zsj2/njo -6 uwzlj6qor 2.0 hours. How much heat energy is produ2 73zqjztl6osv6/-o i jwnj+uced?

  A battery is rated at 12 V and 160 A-h. How much energ2 oag ox+jawrv u6)u/-y does the battery store?-w 2 /oxao uvu)jar+6g

  How much energy does a 25-W soldering iron use in 8.0 hoiszs weh4-( c.urs?

  A 100-W driveway light bulb is on 10 hours per day. Assuming kd+*w7u)c t2/wqu ru lzcoe+2lp n -j,the power company charge r +dj lwot n)2/u+cuqwp2 7zu-ec*,kls 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus hroi9+ ohum5bryc d5d vgsa,i: g2c0qj:30a- monitor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to run the computer annu+o r3c dg5 uaa0ci2iq5shdym:o -, 9gjhb :r0vally?

  The monthly (30 days) electric bill included the cost of runlk-xr ujgf/u;hn2s8 7ning a central 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 the cost of the monthly electric bill n7hu;rxs/ j g-u8 kl2fif electricity costs 8.0 cents per kWh?

  The heating element in an electric drier ope.(u l0f 2)t: uygcsndjrates on 240 V and generates heat at the rate of 2.1 kW. The heating element shorts out and, in repairing it, the owner shortens the Nfn0 lusgu :2j.c()ytd ichrome 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 thz;hh2cez:9gc0mwvem0 2 0hm/ma xk4z rough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costsc74 asu+r;v 33hl ymehs9cy2g $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 hpu6 6( x ox-qzvk.4awxx has 60% efficiency. How much current does it draw from a 120-V liv (x4xxu6qw.oz ka6-x ne? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What r )m iu,83dklvkcaj2s, ms current flows through tc ik,m ku3),ads2vl j8his device?

  A 500-W device is connected wmi0 djq-2unvnm7 w4h4ub( dt61 /5t(y iepr rto a 120-V ac power source. What peak current flows through (2p0 (/6n5b4miwuryed7dqr1j 4-utimwnt h v this device?

  A 500-W device is connected to a 120-V ac power source. Wh979h/qc rf7 l6ym s7wov jlg4vat is the peak voltage acr97svj7r7clhyqv4l f9 o6 /m wgoss this device?

  The diameter of a copper wire is 0.081 inch. The maximum safe currentjlh0ioxu)3+ * p.k eqw it can carry (in order 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 carriersw po)hju.i+l03xekq* in one cubic centimeter of copper is $8.5 \times 10^{22}$.)