A device that produces electricity by transforming chemical energy into el (v0s. 7ckdwllectrical energy is cskdvll cw(.7 0alled a

  A car battery

  The total amount of charge that passes through a wire's fullkde2.k vdt .b(ksc 2+u cross section at any point pekkd 2bcus+kvtd(e2..r unit of time is referred to as

  The direction of conventio; r; gmc1tpac8n current is taken to be the direction that

  A coulomb per second is the samer y5ecyn..mx 0hk (c4w as

  Car batteries are rated in "amp-hours." This ,xvdlap o/: dd1 xro+ a+yo.u9is a measure of their

  The resistance of a wic 8z(lgep(l 0 27f,v7jv83nquedp ip vre is defined as

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

  The resistance of a wire p*2 ajv.-sqg9qdtr 6wis

  The resistivity of a wire vjoe6*4i 1jx,wz4if+ fqotr* depends on

  Which conducting material has the lowebcmdxx/ (*yo1 st resistivity value?

  Consider two copper wires. One has twice tx z9k f qcn-3y(s:pb4yhe length of the other. How do the resistivities of these two wires comqsfb(kc-43:pnyzy x 9 pare?

  Consider two copper wires. One has twice the length of the other. How do0 ).h )nh7wwws3jhjne the resistances of thesewje)hh30 hwn ).nw j7s two wires compare?

  Consider two copper wires. Onpx4 jtx23rbkxcttbxsm96 + ;- e has twice the cross-sectional area of the other. How do the resxc6t9sr jm3x 2;+-ttbxxk bp 4istances of these two wires compare?

  Consider two copper wires. One hat ,+ub l-alj5 9xktvn1s twice the length and twice the cross-sectional area of the other. How do the resn ljt ,lb-a5ukt 19x+vistances of these two wires compare?

  The length of a wire is doubled and the radi b-5d71 l b 8qkxmjpaueju/h).us is doubled. By what factor does the resistanceu)bjh 85x.pk7ejqua- l1db/ m change?

  How much more resistance does a 1.0 o pn0qg)v9g1u5 d p/w(w ynae1cl*z(i cm diameter rod have compared to a 2.0 cm diameter rod of the same length an*wap lpwndg5(nvz19y oiu (g)e0 1cq/ d made of the same material?

  The resistivity of most common mv. ajn;w hcjid. gdbps5(5v.) plt2*kp.m:kxetals

  Negative temperature coefqijoypz 9x:+dwdb 0 ,1ficients of resistivity

  What is 1 W equivalent t 3dhq-6wkz1ro1e z9 oasls;9 fo?

  A kilowatt-hour is equivalenzof 50l3h le ppobg7g;8v7jx;t to

  If the resistance in a constant voltage circuit is doubled, the power dissipatedxp2j+. a b4sfx .;3gb4dpxafna;h 9lq by that circuit ws+x h3fdx;9lba424nxpbg p.aqj ; fa.ill

  If the voltage across a circuit of constant resistanc84 7ljsuo9 ok3k lu 445tyj0xwb5bovpe is doubled, the power dissipated by that ci4kb7 ju 55owvpkollu t osyjx04b8934rcuit will

  If the resistance in a circuit with constan:e78(yzgkwb +h i)t yxt current flowing is doubled, the power dissipated by that ct) +x(ebkyg hz:ywi7 8ircuit will

  If the current flowing through a circuit of constant resis4n j(zvpp9g q.tance is doubled, the power dissjvng4p .z9pq (ipated by that circuit will

  During a power demand, the voltage output is reduced b42z +gbhhdkc;-ae sky0wl w2 pl0 p8*c.e 2gsry 5.0%. By what percentage is the power on a resistor affecg2cs8ach22d zlg ;krwp0+y p0shek4*.w l-e bted?

  A current that is sinusoidal with respect to time ismwyb.0 dl.t 1e referred to as

  Consider two copper wires each carrying a current of 3.0 A. dht pa2r1x a+.j+gp- d One wire has twice the diameter of the other. The ratio of the driftr1 +-a2ax . t+jdpghpd velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomes essentially zer3 zx6fthdr+ 0e)kl s/bo at very low temperatures are referred tohsdb r0t)xz /l6+e3k f as

  What current is flowing if 0.67 C of charge pau(l 3j /o6;xtq,trdne ss a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus in 2.5*nmho/-g xfll6 ddku; q p7jb ye188p0 min. What is the average ;1k xmod e u8g flnb/6*yj8-p5lhdp7q current?

  How much charge must pass by a point in 10 s for the current to be 0d nc+tse6qwh 953,ovu.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.4ls c6q ot( :enrls/p 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 left on for yl j: vn;lid8010 min. What is the net numberyn8ivl:0 dlj ; of electrons that have passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg of silver e6un m 6i*(qiisa5* n3sxnz r;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 sa3i q6n6*sm5nr ixsen*z(u i;ilver? (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 /ef6b kbh2y te;u/ nw7ez7q8nresistance of 3e8ubh2k7; nybzenfqt6 //we 730 W?

  What is the voltage across a 5.0-W resistor if the current through it is or,0h.i gdfb55.0 A?

  A 4000-W resistor is connected across 2n 8nbdgk-thy.3qo (4 -,uyirf 20 V. What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. i:iseo3 teq/3q s 9h2pw/y 2ejWhat is its resistance?:ho /ess yii3j qt2wpe 9e/q32

  A 12-V battery is connected to a 100-W resisb gxxni5n0 i*by2 m -:go6rkz.tor. How many electrons flow through the wi. by6mxn :x0i* 2nzgig5rbok -re in
1.0 min?

  What is the resistancg9s:g anoio+e+-pz9 fe of 1.0 m copper wire of diameter 0.40 inch? (The resistivity oa+gopi:n9g ez-s 9fo+f copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 v,zsyha6/sq 2vihe +.7v4nr3 gtf c29pmh:u xcm in diameter and 45 m long, if the ress 9.q2u f:vg iy, 67xphvvanze /4sh2mrcth3+istivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (rj4 78hvkfyyo zc.:u,xesistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wi2 ctsws+hh.5nm; xr 7ire (resistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 m long, measures 0.04f/tep:vwdo51: na s -k0 ohms. What is its resistivity?

  Calculate the current through *tv.1rv k,pia jweo5n, n5ck*a 10.0-m long 22 gauge (the radius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. (The resistivity of rcv n*j v51at,. *,ekw5okinp nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and of rectangular cross-section, 1.0 cm cho:n55+j sjnx 2.0 cm. What nn:s+jh 5c5oj is the voltage 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 nichrome wire has a radius of 0.50 mm and a resistivityum.dk,:-w rxm 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 wire (rdo796ap 2b1,ywb hh dvesistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistance of3f7nngw1h- qur+.) ,fe4wa s, wo ozourok3p* $18 \Omega$ 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 resisn d/1e*v fy b udd:i*i:up .a5/hk/rcmtivity 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 indium. ,. 5ss vmh6l wtgrz5ef 4iq42q/e6v upThe resistance of the platiqfw4svr4iztl u5 g /2emp66qh ,5s.evnum 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 thl05wxyh ej 4 hi+tkdx**vp.*brough an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is hh7:jwm +biz -rated at 1200 W. What current will it draw?

  A 150-W light bulb running on 110 V d2yfm/gh 3;bxzx8z5t n raws how much current?

  What is the nominal resistance*hc 2 8qvx71dgphqrb)n)p q *g of a 100-W light bulb designed to be used in a 120-V civ)nqhc*x8q2dg p7)b rhq g1* prcuit?

  A toaster is rated 800 W at 120 V. Wrxyi- (p;,yi.f8 tt fnhat is the resistance of its heating elemen;r8pi.tf yxin -,yt(f t?

  A 200-W resistor is rate2k k(,6np;ajwp06tm9 .;fqlrfqnqlm d at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ratnb5 oc+co x15 *4e gwlriud/;xed at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V,s6li6cf0elq+s jf3y; what current does it draw?

  A lamp uses a 150-W bulb. If it is used at 1ue4cflneec i258c14 u 20 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. Wha tz1wam n3/f d+4ljx4ct is its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours, if enery5zi+ /p2 buq mm.m*qbgy costqbu2q+pmmy 5 mz*bi./s $0.08/kWh?

  How much energy does a 100-W light bulb use in 8.0 x 8 (oivh1nf .9zazi)ohours?

  A 1500-W heater is connecteiwv9j7a +qlfob2p4n (i ;o f4hd to a 120-V line for 2.0 hours. How much heat energy is prq bhi +9pjf wo(io4a;2f4 nvl7oduced?

  A battery is rated at 12 V and 1 xe*o5m.k)e .j v4yvbt60 A-h. How much energy does the battery store?t.vovx m.)e* 5ye4kjb

  How much energy does a 25-W soldering iron use in(j/dec/p(wx vtyl b,c 7./tqxol45oj 8.0 hours?

  A 100-W driveway light bulb is on 10 hours pe9guq.w5 z..wdssq3cy r day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to9 5w s.y g3suq..wzcdq operate the bulb.

  A 400-W computer (computer plus monitor) is tur d/ ves;2hd(ulned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does 2(;shevd/ lduit cost to run the computer annually?

  The monthly (30 days) electric bill included tuee t8s+d7p(f he cost of running 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 thtf8 7(pu+e edse 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 waej 17;-zixhand generates heat at the rate of 2.1 kW. The heating element shorts out and, in repairing it, the owner shortens thja7ih -we1z; xe 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 throug d+ek92 1k/x4zxw 1.6 bwlife af-iveth $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery cost .*vo*gdh 4yrwec5 6qq(aj df8s $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 ofxd6r*i8h s jl5 2.0 hp has 60% efficiency. How much current does it drais 6xd5l *8rhjw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connecteawv6( h ras9p .j3ad4vd to a 120-V ac power source. What rms current flows through this devic94hp vrs ja( w3aa6.vde?

  A 500-W device is connectegm 0 ,qwdbvt24d to a 120-V ac power source. What peak current flows throughwgt4qm0db,2v this device?

  A 500-W device is connecteiv)zpy0hyj m m)2ao8 (d to a 120-V ac power source. What is the peak voltage across this device 2ivhjz)8m ap ymy0)o(?

  The diameter of a copper wire is 0.081 inch. The maximu /-t -rcntvcaiu.z06dm safe current 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 carriers in one cu. iun c-va-6t/z 0dtcrbic centimeter of copper is $8.5 \times 10^{22}$.)