A device that produces elee6kt0ph*urzev,epj k h), w+0ctricity by transforming chemical energy into electrical energy is c ,6j*ee,0 kp)w0v+khrhpuz etalled a

  A car battery

  The total amount of charge that passes through a wire's full cross section )1 v+.2wzfu; ,wzqyk f juyqq(at any point per unit of time is referrefvyfz2 )1q ,w;kuuq+y .zq (jwd to as

  The direction of convention current is taken teo0fj0 skzy./9ujf 8 qejr,, uo be the direction that

  A coulomb per second is t+b+ei7yyd- qy fptsx en8,7(nhe same as

  Car batteries are rated in "amp-hours."qq0nba(l p-3 g This is a measure of their

  The resistance of a wire is 6 iwwcqe(4z4kdefined as

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

  The resistance of a wirrh(5zwau3zlj-hv h ( uc613ps e is

  The resistivity of a wire w jb.ml. t4vf5depends on

  Which conducting material has the lowest resistir xol0lhq /-:rvity value?

  Consider two copper wires. One has twice the length ofz )f+l*bfj 9bz the other. How do the resistivities of thblzffz9+b* j )ese two wires compare?

  Consider two copper wires. One has twice the length of the othej-x y h(maz/2zghj:g8j f r88ur. How do the resistances of these tz /g88muhj 2rx:8zgj(fayhj-wo wires compare?

  Consider two copper wires. One has twicb 3l/b3p 3trjod r7z:ce the cross-sectional area of the other. How do the resistances of thesoj z3/:tpd7l 33b rrcbe two wires compare?

  Consider two copper wires. One has twice the length and twice the cr0 42 yry8glwh 9b5groross-sectional area of the other. How do the resistances of these two wires comp8 r054ry g9bhrow2lygare?

  The length of a wire is doubled and the radius is doubled. By what factor does tj1x lck7+f 1;ot jd4e nk0i7nthe resistance chakn 1dex47n1ij 7c+ o ljktt0f;nge?

  How much more resistance does a 1.0 cm diameter lev4ga8ioz42 z 6gcn*bf-w l c2d.m0s rod have compared to a 2.0 cm diameter rod of the same length and made of the same materiaobe4a m.lz6v* l -sggc2dz0f428c inwl?

  The resistivity of mkl 2*vn 7h1x+hvu0 kc6e 2n0dfkcdhq: ost common metals

  Negative temperature coefficients xxghuu1;c9*xw 6q p3jof resistivity

  What is 1 W equivalent to?cn 5n2iisz9l;r v0ry.

  A kilowatt-hour is equiov rmy9 *,he(uvalent to

  If the resistance in a constant voltage circuit is doubled, the power)m h6h w d:khnw ((tfgd: bj4k*o0 nlkc+q7q/f dissipated by tha co:fn )dh 4q + wlwkfjgkt06kh*mhd7/:q(nb(t circuit will

  If the voltage across a circuit of constant resistance is dog5m 4sc zuhj0(ra;r+vubled, the power dissipated by that circuit gs (+mhrcv uj; z0r45awill

  If the resistance in a circuit with constant cpj2g)8u rt s5rs6*;l ht.gcrlurrent flowing is doubled, the power dissipated by that circ*p ;rhg t2jscglrs.u58t6l r )uit will

  If the current flowing through a circuit of constant resistance +/o tz7qtpfw5is doubled, the power dissipated by tha7z qf+t5pow t/t circuit will

  During a power demand, the voltage output is reduced by 5.0%. Beb56e-bwedh 31 la vdyvyl;d 4 j-*7dsy what percentage is thewa*-e3s1j5d h;ed7b4- yyd vb 6lvdle power on a resistor affected?

  A current that is sinusoidal wi4dqyt1b; o gp.g6 bry(1dwl2ath respect to time is referred to as

  Consider two copper wires each ca; lv a401qv*wip-qckm rrying a current of 3.0 A. One wire has twice the diameter of the other. The ratio of the drift ve; ka 1vvlw0iq q*4-pmclocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomes essentially zerov0u2+f+uwd d-as v mw: at very low temperatures are referredum v2vdw0-wua+ d: +sf to as

  What current is flowing if 0.67 C off s oafwacxkc -v9uk)+w pmo02q9 53-k charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating ap2ejz gj)w ps g-h4f6 2bb3yj8*fkm)rwparatus in 2.0 min. What is the average currenb 6rwy4j3kbjmsjff )ggw 2e)p2*8- hzt?

  How much charge must pass by a point in 10 s d q:siq.v3hn9xik(on k* i-c t95bl 2bfor 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 bbibc(0b8z ,v $4.0 \times 10^{16} \; electrons$ 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(*d-d uvuk eok:b-5or/ o gpl+ 10 min. What is the net number of electrons that have passek/-reo-d( du lo*pg :ok+bu5v d through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg of silver on a oo95zl tg4v/a 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 silver ions are singly charged, an45v a otglzo/9d the atomic weight of silver is 108.)

  What potential difference is required to causk3gi(z9f+54+oucgun z awn ;ce 4.00 A to flow through a resistanco3zgfiwagc;c+nkz(uu5n 49 +e of 330 W?

  What is the voltage across a 5.0-W resistor if the current through it is 5p(( w0casq 1/nqv-3sdn*hieg/fm/y v .0 A?

  A 4000-W resistor is connected across 220 V. What current wil;+sbq bbz,*c ql flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its resista0+pfh jr/d,vqsqi -q8 nce?/0-q+v8 hfq ji,dsp rq

  A 12-V battery is connected to a 100-W resistor. Ho8kprg, n7y9b u2:5lpck :y fvxw many electrons flow through th ly2bp: 7n5:xpufv yr,cg9k8ke wire in
1.0 min?

  What is the resistance of 1.0 m copper wirfk0bzwk *2ng)w*tl3k qn1sv) e of diameter 0.40 inch? (The resistivi 1wvq0kgk3 t*z ks)w)2bnn* lfty of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a cirf)di axhjw b w9f.89:tcular rod 1.0 cm in diameter and 45 m long, if the resistiv9 f)htwfiw9 x:.8jadb ity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (rgxe-y3g *i/b (j(zoy yesistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire qdrukz7n .6n dwtw1 0+pj/:vg(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 0.040 ohms. Wh2y5leip qm2xke*l wu( d,rd0 2at is its resistivity?

  Calculate the current th cxby5v**r ib,rough a 10.0-m long 22 gauge (the radius is 0.321 mm) nichrome wire if it is connected to a 12.virx5 cb,b y**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 crox2yqnlrrl:p; hw6wbm9-3skf v m3 57uss-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carries 4000 A?k fwp32 lxlqwmyhrs:36 n9r75-b umv; (The resistivity of copper is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichrome wire has a radius ofz s5cj yz6/f5jvib9wj3ac ,n: 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 wire (resis :if2 oe8nhcw (q-lupy/2jb 7etivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistancf/y:qg 8rf l.n0ac .kte 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 /jn;dyuzpd 30 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 detyn/k(.emli-c, 9hs pv ermine the melting point of indium. The resistance of the pl/ sp(-ec ik l9,yvmh.natinum 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 ap t0 z6to)8gj+)mbkg cn $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 dfk ivfu:1p+; W. What current will it draw?

  A 150-W light bulb running on 110 V draws how muq +y:jmu)f;sifxf3pra 0 p(h,ch current?

  What is the nominal resistance of a 100-W light bulb designed to be used in a 1+ phig 2nk02cr20-rp+cig0k2 hn2 V circuit?

  A toaster is rated 800 W at 120 V. What is the resistapp pr gxk19s)9nce of its heating elemen p kpxs9)9grp1t?

  A 200-W resistor is rateqe,7 1f )lljmareso/7x(y2-+yzys ued at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated 7f: /ubx9, crw9isopv at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what bub5 ;)dsbf -kcurrent does it draw?

  A lamp uses a 150-W bulb.x0yz+ ,sc1xr-e 7beoy If it is used at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What i;ronb7*3 tgdwvz3i4hr( *5oujdz6 tcs its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 jt)3yfteaczh fia3i/6w(tq,l6.z; l hours, if energy fqw/t )jheci.ita 6f zlz,6t33lya(;costs $0.08/kWh?

  How much energy does a 100-W light bulb use in 8.0u2 pzm)(+j4o9r-x f jtsbp0mm hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much heat eqzk-32 u0daw mnergy is pw3az0- mk2 dquroduced?

  A battery is rated at .*l8fee4 lbdv 12 V and 160 A-h. How much energy does the battery store?.d*4eel vb8fl

  How much energy does a 25-W solderie4vny 6xsy mvk6f )y07ng iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming thex-xt) sz;xot2 power company charges 10 )xo2tt -xzxs ;cents for each kilowatt-hour of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0 hours per day. az:+i) )b0c+z;h rf +yx bopxe If electricity costs 10 cents perz+zfi+oc: )0;beayrphxxb )+ kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electric bill included the cost p+(em dyp3a-7r*mxuhrh 6 2am 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 iy raxurd*mmm7 a 32p +-h(ehp6tems contribute to the cost of the monthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element in an electric drier:a7j4r kt8nbcj ue j0) operates on 240 V and generates heat at the rate of 2.1 kW. The heating element shorts out and, in repairing it, aj ujrt8kj e7c4)0:nb 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 6t/1 zo*l tqrzthrough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs t84jscnak+dw bi /y sfl+5qg)+bc ulb+b;42q$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 curk6d c 5v)irr0+rni ;gkrent does it draw from a 120-V line?rrv indgk6c i)0+k;5r ($1 \; hp = 746 \; W$)

  A 500-W device is connecteja6 fxz1f4r6 jd to a 120-V ac power source. What rms current flows through thif61f6jj rxz a4s device?

  A 500-W device is connected to a 120-V ac power sour9exh7xg tvq:y10min - ce. What peak current flows through this degn9 qeivmy:h-7xx01t vice?

  A 500-W device is connected to a 120-V ac powergiatar .b28n s 1e(lr0 source. What is the peak voltage across thi( te8br aigrla.s 02n1s device?

  The diameter of a copper wire is 0.081 inch. The maximum safe currq),s u /xl(mr cny)lvh)z0)dnent it can carry (in order to prevent fire dn)u( sn dl)0mqc))zvyrlh,x /anger 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 $8.5 \times 10^{22}$.)