A device that produces electricity by transfox5*gps(whua6ds xp / 1rming chemical energy into electrical energy i*uw5 p s6xpsg d1xh(a/s called a

  A car battery

  The total amount of charge that passes through a wire's fuls.r6m5 gjtjr rcn 75*fl cross section at any point perjs c75fr*5g6m j .rtnr unit of time is referred to as

  The direction of convention current is taken to be the direction tha+hcqjaqz2kj x7 5 ch6*t

  A coulomb per second is the wqce (c5;wa 4x0u)sy)nh mjd8same as

  Car batteries are ratedo kr9-udkm74t60 znzr in "amp-hours." This is a measure of their

  The resistance of a wire is bxd.fqwiu5 ;7o1a x 3ydefined as

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

  The resistance of a a rk6fkqyy :13wire is

  The resistivity of a wire depends 7ug2 w1+exw:gm. --ceuhheccon

  Which conducting material has the lowest resistivity vav:9 ivsy1wb5 a7as :onlue?

  Consider two copper wires. One has twic1:ruxpy mqapgz* s: 9 7.qoh5e r8t)xce the length of the other. How do the resistivities of these two wirp uy8cotae xq:rz 17*.pg)ms9:h5r qx es compare?

  Consider two copper wires. One has twice fj1m/5p wx;nx the length of the other. How do the resistances of these tnjfxxm;w 1p/ 5wo wires compare?

  Consider two copper wires. One has twice the cross-sectionalccxvhsbcv 2; ol8b13+ area of the other. How do the resistances of these two wires+bocshc1328 xc b;vl v compare?

  Consider two copper wires. One has twice the lengts :upnnt99,jp9.cl7 zzwg6ne h and twice the cross-sectional area of the other. How do the resistances of thessu l ntjn6g:pz7.n99e9, p czwe two wires compare?

  The length of a wire is doubled and thepsu5 t +3knu7hacf0k8 tpg.:g radius is doubled. By what factor does at3hg :c 7pkfn80tuuk 5s+pg.the resistance change?

  How much more resistance does a 1.0 cm diameter rod have compared to a 2.0 cmp6be l5;. 5un(ow7jlnic o9xn diameter o5lxp e65 counlnijw9( b;.7nrod of the same length and made of the same material?

  The resistivity of mwf rzo6hu *((post common metals

  Negative temperature coefficients of resistivitsd6lzmc7sei--nwzws 7 .)b0oy

  What is 1 W equivalelizndyvy 7.9j0l u2y8nt to?

  A kilowatt-hour is eqyp((-oiu lhoq67p qi3bq ;-mquivalent to

  If the resistance in a*f kk(uwx 3uve/x)s7 g constant voltage circuit is doubled, the power dissipated by thatw* xgxvefu7()usk / 3k circuit will

  If the voltage across a circuit of constant resistance is doubled, the pow46*rs6 ej zhiier dissipated by that circuij6rze 4is* 6hit will

  If the resistance in a circuit with consta(0. kmepp dfr1gym+c3nt current flowing is doubled, the power dissicfyk p1(e0+r gpmd 3.mpated by that circuit will

  If the current flowing through a circuit of constant resistance is doubledd u,ncpgn: 7+ 46whvas, the power dissipated by that circuitv6+ gn:,n4scp au 7hwd will

  During a power demand, the voltage outpu;r ;jc)r ba u4dmvv5/kt is reduced by 5.0%. By what percentage is the power on a resistor affjr/)cdvu k 5m4v;ab r;ected?

  A current that is sinusoidal with wcrr.; cm )m3nfif2/krespect to time is referred to as

  Consider two copper wires each carrying a current of 3.0 A. 4d0x8 zclhj9q One wire has twice the diameter of the other. The ratio of the drift89c jl0zqd4hx velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomedf c7hn kv/5o:f9 mjs(s essentially zero at very low temperatures are referred to /n khc:ojm 9fdf7sv(5as

  What current is flowing if 0.67 ps; byl:: wv-hC of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus i6 ovbpwp-(//n:h1l rvwymqm 3n 2.0 min. What is the average curl h /o3myp1pwmv :q(w-6nv/brrent?

  How much charge must pass by a point in 10 s for 5 yqr7qcre3dq8w m h-0the 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 flowijr*, y, k, a/zjhuxn8ong 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 b lv vc0r*x*j-tkcq ,k3een left on for 10 min. What is the net number of electrons that have passed throu qc*3x0-vlkk t r,j*vcgh the coffee maker?

  In an electroplating process, it is desiredad,jvt)8m c :, /(+xxriar x5tlq9kho to deposit 40 mg of silver on a metal part by using a current of 2.0 A. How long must the current be allowed t: jrv,i x+xx(aq /ch k5a,l) t89rtmodo 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 totamnhbn x1le)y z:vz 478-k*b flow through a resistance of4knbz 8hlmv)* zexy n 1:a7b-t 330 W?

  What is the voltage across a 5.0-W resistor if the curre iu29n *yry;mjnt through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What current will fbmj.zq0w09 a flow?

  A light bulb operating at 9d3aobi2t g :q110 V draws 1.40 A of current. What is its resistance?2qodbi9 t a3g:

  A 12-V battery is connected to a 100-W resistor. How many electro0/7a e-vomm8b uu6ulnns flow throug 0enuvuu 6 -/oablm78mh the wire in
1.0 min?

  What is the resistance of 1.0 m copper wire of dz0iq u ltepl5;x1g+, diameter 0.40 inch? (The resistivit+ uqlx0e5,pgi1d ;zl ty of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameter and 45 m l0i / cbp/3hiwoong, if the resistic/ /hibopw30 ivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (rec9e- f5r spqm2sistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (reshw qpw6j- xp(cf-x:(e istivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 m long, measures *dm;3ff o +ihthd 3gm00.040 ohms. What is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge (the radius is 0.32j*j+5n* :mqetwy vu4k1 mm) nichrome wire if it is connected to a 12.0-V battery. (The resistivity of4t k *wuymq: v*e+nj5j nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and of rectp:vj, n( 0pmjsangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop alojs(j0p,p :m vnng 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 jkf+q. 5jjxwgvg- *e2mm 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 (resdlz7s;08 y jatistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor haqxviu 2w( 4o1ys a resistance 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 (g 7w0p p .kqw8sbv+ic$3.9 \times 10^{-3} /^{\circ}C$. 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 i9ehy h+fy 90ah4r etl7ndium. The resistance o9yr4h 0eft7 9elh+yhaf the 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 through azw2 ounq2 o.ya5;j3gbn $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What ngz,t:lmi.pb 1td:8f4uu al/current will it draw?

  A 150-W light bulb running on 110 V draws mud+i.t*bz ;obieh a*3 r)f0a how much current?

  What is the nominal resistance of a 100-W light bulbgg0 en t;npb:/ designed to be used in a 120:n bgen;/0gpt -V circuit?

  A toaster is rated 800 W at 120 V. What is the rest wwy42m)1lcw istance of its heating elemen42l 1m)wcw ywtt?

  A 200-W resistor is rat9l2x+bw 6:7u ne 5e .jvmtxl:rogs+ cjed at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ra h3dk1i:lx),gxanf 3 rtcdg2 g+4 /jukted at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what current doebk eh re4hd 7mfsq*tzn+05,a)s it draw?

  A lamp uses a 150-W bulb. If it is used at 1 9r2b/*zzexblv2)rb e20 V, what is its resistance?

  A 25-W soldering iron runs on 110 V.kt 0v1e0ppzr 3wgzh ;6od) rv: What is its resistance?

  How much does it cost+qgnq-d) j;y t to operate a 25-W soldering iron for 8.0 hours, if energy costs)t-q+dg nyj ;q $0.08/kWh?

  How much energy does a 100-W light bucpw j(14b8 jrllb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line f3v ebw(7pc+wzor 2.0 hours. How much heat energy is producew(+cewp v73 bzd?

  A battery is rated at 12 V and 160 A-h. How much energy doearm/.0f j7(1lxn 0 a rufnjgb/s the battery store?1r/0gmuafrlxa/ 7njbnj 0.f(

  How much energy does a 25-W soldering iro;hk/7g) (odzy2pa iq un use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hourkg0axj+fue, m ,*23k.pxybc vs per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity ,vx,cpuk3m2 *ay0gbj x.kf +e used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned l6:kapl7w2ni )c1 s :quqw:mr on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to run the computem) ap6:2lnkwql:7qc ws:r i1u r annually?

  The monthly (30 days) electric bill included the cost of212rc5, wl nt)s unmvgzc ;-qg running a central air-conditioning unit for 2.0 hr/day uv gn m2cqn2r,5 c;w)-lst1zgat 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 an electric drier op f2f30kckhg 7xerates 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 Nichrome wire by 10%. (Assume the temperature is unchanged. In reality, the resistivity offk0c7x gfk2 3h 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 flow s: -)j1qcrx uwcrx:u2s through $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costbk)qmd. h.9 e 5c8mruvs $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 k689w2aw9 shp2olzvmhas 60% efficiency. How much current does it draw from a 1pwa99l2sv mzk h 68ow220-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected zy-ds ifb(i 70 3:xrowto a 120-V ac power source. What rms current flows thr0siwf:( 7x3d yzoibr- ough this device?

  A 500-W device is connected to a 120-V ac power source. What peak current 5kbdzm 0m9q,r5liyl i.y1c,kflows through thi,5mi k m51blcy.rdyi 0 qlz,9ks device?

  A 500-W device is connected to a 120-V ac power source.+1fww kwlfb9 cz;fhrrb,k+;+ What is the peak voltage across 9zf bw bww 1rc+h+f;f k+,rk;lthis device?

  The diameter of a copper wire is 0.081 inch. The maximum ww;-my w5i/wl 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 electroww - /wwl;yi5mns? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)