A device that produces electricity byjhbne+c;ca /is) ,c /t transforming chemical energy into electrical energy is calledb ,j+cnciet/ch /s)a; a

  A car battery

  The total amount of charge that pass+ / mvns/ov0kves through a wire's full cross section at any pkv / /ov+sm0nvoint per unit of time is referred to as

  The direction of con3sumys:.82dv h9 1ih8j julo lvention current is taken to be the direction that

  A coulomb per second is the same atlml. n-m85 h+i06ldj fdy; vps

  Car batteries are rated in "amp-hours." Thiul *bgx :*u2zhs is a measure of their

  The resistance of a wire is defined cr8yz k6/jjk5-)k duzas

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

  The resistance of a wire: ycp91jw kj2kvj; 5be u q5be4/i8bld is

  The resistivity of a wire ,qsn;f+z ;5cy;5:eu x : vxguub.sknpdepends on

  Which conducting material has the lowest resistivadh.75 yjms sc(-xw 7gp5qxn/ ity value?

  Consider two copper wires. One has twice the length of the other.d,9m6ojy lmd+xh,yz i/ar(0 b How do the resistivities of thes(ym /izo,+,d6 ahj rb xylm0d9e two wires compare?

  Consider two copper wires. One has twice the length of the othe.wae cnu oq s;98oha9z1g8 .ser. How do the resistances of these two wires hwn.agqoe9so c1 eauz8 s8;9. compare?

  Consider two copper wires. One has twice the cross-sectional area ofgarp k()p r9d*e(jg: m/+qcq s the other. ps9mrq)p :c(*ggej(qd+ ra/kHow do the resistances of these two wires compare?

  Consider two copper wires. One has twice the length and twice the cross-se.;k.9gz 7g mg h4nl * kvh:+fuuio*jil p(du.gctional area of the other. How do the rep+ gmi (fn9ug7v4.j *uzl glki ;ud. :ok.hhg*sistances of these two wires compare?

  The length of a wire is doubled o.a.q; g u,aijand the radius is doubled. By what factor does the resis. .uqia; ,goajtance change?

  How much more resistance does a 1.0 cm diameter rod have compared to a 2.0 cm*8h5lyw4( nykkma *sq diameter rod of the same n k*a4yq8(ksl*5wy hm length and made of the same material?

  The resistivity of most com p7cn(x):qn0 bh m*1d2 mofayamon metals

  Negative temperature cd: 3 zx40k;z:vjl9bds0lkmt3rtwh6fd fl(r: oefficients of resistivity

  What is 1 W equivalent tmn zcgc b ;vfl,*tm1b7cx4*j- h6t yk:o?

  A kilowatt-hour is equi1x.sh fv+1ng;g snm .rvalent to

  If the resistance in a constant voltage cchonjdn 6t7rj* q6 5f-ircuit is doubled, the power dissipated by that circuit wionh6 q5* rntf6cdj-7jll

  If the voltage across a circuit of constant resistanu7sk5sh 1gswop2v,- e ce is doubled, the power dissipated by that circuik2 v usosp,hg sw-e175t will

  If the resistance in a circuit with constant current flowing is doubled,gvgl h j 2pt85/dyn12n the power dissipated by tha52l2 yv1nh/ng gtp8djt circuit will

  If the current flowing through a kk: cgmp.bk08a1 b0wm circuit of constant resistance is doubled, the power dissipatepbk0mw.8g 1mckka b0:d by that circuit will

  During a power demand, the voltage output is reduced by 5.0%. By what percent7 yupy70s e;zr5lud,sgo5 7quage is;7y0,l g 7pseqz7 us5ou5urdy the power on a resistor affected?

  A current that is sinusoidal with respect to time is referred to asfrdsd- ,2s0io

  Consider two copper wires each* lmznm *2r7:n pxwxevu:jqs6sr-5w3 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 diamet:2:umnw * pzj6rxl sm -n5w*3ve7sxqrer wire to that in the larger diameter wire is

  Materials in which the resistivity becomes essentially zero at very ay (hsf-g6a9g3xsf /d low temperatures are referreddsffghs6g3a-y / a(x9 to as

  What current is flowing if 0.67 C of chexvwotu 4b g4yt+t- 0l9f.p r(arge pass a point in 0.30 s?

  A charge of 12 C passes through an3orn 2 k: j-tw-zk9pv. qjtf-i electroplating apparatus in 2.0 min. What is the average current vr:o-9t.3q k -itjwzjk-n p2f?

  How much charge must pass by a point in 10 s for the cyf/ho5xm6vr47lam 9 rt99bgturrent 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 qusvy 6d/b1 n5if $4.0 \times 10^{16} \; electrons$ 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, h hv vq8ru;rttbv+,; 1eas been left on for 10 min. What is the net number of electrons th+tvv,1 qrtrv;; eub8 hat have passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg of silver on zs52)g laccf5 a metal part by using a current of 2.0 A. How long must the current be allowed to run to deposit this much 5g5sfcc2lz) a silver? (The silver ions are singly charged, and the atomic weight of silver is 108.)

  What potential difference is required to cause 4.00 u qd/c7ig52cdA to flow through a resistance of 330 W?ci7dg 5uq2dc/

  What is the voltage across a 5.0-W resistor if the current througha(nxc4qu n15u it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What cu: 0om mvi g9l,.ppulo(rrent will flow?

  A light bulb operating0+h5l1iw6; imtv t eif a/r so3::urcj at 110 V draws 1.40 A of current. What is its resistance? 0rihojwf i:/:6el;vst+iu a mc5t1 3r

  A 12-V battery is connected to a 100-W resistor. How many electrons flow throutj. uct(td+:b ) h mjhyny:(r5gh the wire in.t:tyrnhcm tb)(5d: +uj h(jy
1.0 min?

  What is the resistance lc4w h(8ztp+yof 1.0 m copper wire of diameter 0.40 inch? (The resistivity ofy+4(tlpwhc z8 copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circ, u5xkc w5,jqfo ntw/2ular rod 1.0 cm in diameter and 45 m long, if the resistivnk,o/ ,wux2c5 t5qwj fity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire hk o 19nnc+fp9cns1(e (resistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (res svqrv,;j) u:jistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 m long, measurafi9 uh8qh4jwpc;r 3 .b(5fsnes 0.040 ohms. What is its resistivity?

  Calculate the current thrl;z.+ dazaio. ough 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. la a+z;zo i..d(The resistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and op5b1ca b c 9vlua99b+wf rectangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length whe ac51vcba bw9up99+l bn 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 ptd 9da)q*hfc ; + ps:avb-c,nand 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 (7. ozxs50 txirresistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a rerw p:f5c2q; kasistance 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 platinum is .h*umar)o 3a ) ,ogiab$3.9 \times 10^{-3} /^{\circ}C$. 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 ind13wu*41hi+8obr f rs+bl pfkcium. The resistance of the platinum wire k r8obb* +1ffi 1l+3w4hspuc ris $2.000 \; \Omega$ 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 n*-hv6xe:i9fono3l f mv nw;;an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What cufb/- a (;y p(t1 llmv.svr-n1cwd g:lnrrent will it draw?

  A 150-W light bulb running on 110 V draws hoalja6s w *b bt6iy7v m8*0b)cvw much current?

  What is the nominal resistance of a 100-W light bulb designed towp:c hs-roc7d08x .dy be used in a 120-V cix:rp-8d d ywh. oc07csrcuit?

  A toaster is rated 800 W at 120 V. What is the brwugs/b5i5;as,(ae 9 h;anq resistance of its heating elemen(hi9aws5 abq / 5sben;g ra,;ut?

  A 200-W resistor is ratedr+)ia 4b+1 zf ywcev;o at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rat*1rp* -jvf 04nyxvcqw ed at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what curren lxq, ;-gbkqi lhq;.+nt does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is its resisx2vy+;htl h7w+ x0 tyz8qhz1n tance?

  A 25-W soldering iron ryv guw4ip:r8 4uns on 110 V. What is its resistance?

  How much does it cost to operate a 25-W soldehop: gl+4d ta;ring iron for 8.0 hours, if energy 4:+ pt aldg;ohcosts $0.08/kWh?

  How much energy does;wwolqh k-3j+ a 100-W light bulb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V lin-k0vz iy; b m:h(0uokme for 2.0 hours. How much heat energy is py(;:v o0bkmi kmu0h-z roduced?

  A battery is rated at 12 V and 160 A-h. How much energy does the +y+qy+7(ni kafmfq :dbattery store?mkny(q +q+yad:+ i f7f

  How much energy does a 25-W solderiuqo vu;eogku):)o w2z/1d6 r p/dl*pxur) wf+ng iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hu96jd9 bhfqte us4)g4tww7mc :h6 ,cjours per day. Assuming the power company cha, bqjtd7 f :umc j6t)w9hu46esgwhc94rges 10 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 onn5un:/ba s.le 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it :l a/nnbesu5.cost to run the computer annually?

  The monthly (30 days) electric bill included the cost of running a centraby4/(b wrgn* y um(d.el air-conditioning unit for 2.0 hr/day at 5000 W, and a series conne *g (.u ye(4rd/wbybnmction 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 an electric drier operates on 240 V a4e5wtb9 z14;fzm imb mnd generates 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 reality, the resistivity of the wire will depend on its temperature.) What effect will the repair have on the power dissipatz1e m4z4f9; twm5bbm ied in the heating element?

  14 A of current flows through ) dt;ze7br 9io$8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costsoewbdl9us8:5w ;e o 7c $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 ht6qc v1o er69eas 60% efficiency. How much current does it draw from a 120-V line?6qe96tc roev1 ($1 \; hp = 746 \; W$)

  A 500-W device is connectj. fq ;gg0x(lued to a 120-V ac power source. What rms current flows throqgg;fx(. jlu0 ugh this device?

  A 500-W device is connected to a 120-V ac power g3 i,iehjrk54 fy*+ly source. What peak current flows throygki* i4hyfj5+e ,rl 3ugh this device?

  A 500-W device is connected to a 120-V ac power source. What is3futk+ y n:-vy1brb 0y the peak voltage acrossvrnt+0f :yb-b3ky u y1 this device?

  The diameter of a copper wire is 0.081 inch. The maximum saf3myk dvuc w*78(x p9nye 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 numberd973(v xwcnp kuy*my8 of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)