A device that produces electriciqjtqo5h- 7yd xewu ap,6c(7h8 ty by transforming chemical energy into electrical energy is cald7o,pq chxy6w7 8-(qujt5ae hled a

  A car battery

  The total amount of charge that passes through a wire's fu-nt8v- ux/fsjd r4ru4ll cross section at any point per unit of time is referred tfd84nxujr-- s 4t/ruv o as

  The direction of convention cul6 -vw 49ryvw+s *btvwrrent is taken to be the direction that

  A coulomb per second rfnfqc5.w9 1: dhfh:6fn414 rocjb uw is the same as

  Car batteries are rated in "amp-hours." This is a measu*+n- 9t dd/snl)akpls c c72 f*gxtrm,re of their

  The resistance of a wire is p sl7 x55x8t;wni jwpsz4oy ;lw 2o,/xdefined as

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

  The resistance of a wire isyb/c .f.zv e-e

  The resistivity of a wio302i. llskw qn vs*iatp:0u0re depends on

  Which conducting material has tdg/3to90c; vm ww5qj rhe lowest resistivity value?

  Consider two copper wires. One has twice the length of 7g n7l(2thushthe other. How do the resisnl huth2(7s7g tivities of these two wires compare?

  Consider two copper wires. One has twice the length of the other. How do z ui y,b/3l87pzmhje6 the resistances of these two wires comparebzz,i/6h87m ljp ey 3u?

  Consider two copper wires. One has twice the cross-sectional area ofttrwga x s:5q55z /,nu the other. How do thetgzn5us/5t5,x qrwa: resistances of these two wires compare?

  Consider two copper wires. One has twice the length ani:qgr+f,9xucd s1 4aq cus 8,pd twice the cross-sectional a,1+ucpq9s4gd rx8 cfau: ,isqrea of the other. How do the resistances of these two wires compare?

  The length of a wire is doubled and the radius is double w8lzz86v,gh79m kqq e a:rx)jd. By what factor does the resistance c6qal rm,zz8 w)jh g: 78xke9qvhange?

  How much more resistance does a 1.0 cm diameterqcd2 shc)f*o7 rod have compared to a 2.0 cm diameter rod of the same length and made of the same m h2)o* cdfqsc7aterial?

  The resistivity of most comme fcspbodz9 :i1s0p5tre4- 3 vx2kc* jon metals

  Negative temperature coefficients of resizkrpb5 s 9 :-tghi/r,vcvl95mstivity

  What is 1 W equivalent y-ps5dpz8ovx+i 88kbto?

  A kilowatt-hour is eq;nuuic .a* d8uel w0:ouivalent to

  If the resistance in a constant voltage circui q(byr *gqqy9nf4)8ky t is doubled, the power dissipated by )bgyqfn( q 9y8*4rkq ythat circuit will

  If the voltage across a circuit of constant resistance is doubled, the powe/y6 so+wz)9)(chhqg pmf.d 9)kx kmsfr dissipatecofq sk9.(h) f9s6)z /wh+ pyxmgdm)kd by that circuit will

  If the resistance in a circuit with constant current flowingsbt)w0rw -( o8 i+wh0s+ etnya is doubled, the power dissipated by that circuit willwbwh(+0ws ye ai8t+-r) sn0o t

  If the current flowing through*mkv 7ej ).t*l (d( xjq0nel0.zrpygz a circuit of constant resistance is doubled, the power dissipated by le k(y.7ngjtre0q)(z.0 *p vx* mdzljthat circuit will

  During a power demand, the voltage output is redu8mz a q7d;j at0i0sae;ced by 5.0%. By what percentage is the power on a resistor affe0am;a7dji es8z 0;tqacted?

  A current that is sinusoidal with rk(sguc(by60m wlgf 8-g7o5u eespect to time is referred to as

  Consider two copper wires each carryingcb9 dtna2 5yi)qvg2dkbocu ta3l54 me 487o5x a current of 3.0 A. One wire has twice the diameter of the ot38tvi b d54cqooul 2 59kx47tyd5)ncmaebag2 her. The ratio of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomes essentially zero at very low tem x0diaz35t (j/dxtks, peratures aredikzxj 3sd 05at/, tx( referred to as

  What current is flowing if 0.67:nyqo/td4sb p,lt7 /u +jy h0p C of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus in 2*ww-car j)ktah+n7,5fy :kipa5 y rk; .0 min. What is the averayy7a)tk a 5-*:;hikrrw +a5cpfj,wnkge current?

  How much charge must pass by a point in 10 s for the current to be 0.nj 2+f:k1wl ig50 A?

  A total of $2.0 \times 10^{13} \; protons$ pass a given point in 15 s. What is the current?

  What current is flowind gkt, i ijh1dl5)u ;9e/f vkwdr:4vf(g 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 curr:5ro wp+9 ;) nj qnnrabdl)6pxent, has been left on for 10 min. What is the net number of electrons that have passed thrl+jpa;rb 9) :)pr qw xnond65nough the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg o ss2sd x,s3si/f silver 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 silver? (The silver ions are singly charged, and the atomic /sx,i2s3sssd weight of silver is 108.)

  What potential difference is required to cause 4.00 A to flow througm/nh2 gpnr)1 t75vuogh a resistance og7r/ nmpth2nv5g1 ) ouf 330 W?

  What is the voltage across a 5.0-W resistor if the current through it is 5.0 As:/zysa s o/2a?

  A 4000-W resistor is connected across 220 V. Whatf1hojbbrr,bhs,/jox.qz)7 , current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its(a4vaj6yc)kz/zh w r0 resistance?zykacv/h ( ar 40)wjz6

  A 12-V battery is connected to a 100-W resistor. How many electro :jdsic+sq8 2jns flow through thc jq 2:sd+si8je wire in
1.0 min?

  What is the resistance of 1.0 1n bm1y.y do8 g0.9mi5votnbim copper wire of diameter 0.40 inch? (The resistivity of copper isoybntb d8m1n9m y0 ioi.5.v1g $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circulxx7dvqvx u5m1(na3h mmj24/ c ar rod 1.0 cm in diameter and 45 m long, if the resistivity is 4mxcvq(n 2jmm/h auvx713x d5 $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (rnkjqiuq-,. 4 jf 8h1 r)t.n.l7rkulgmesistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wo:gtbfm7.fwb8qnj-f*dj/6k u *bp9q ire (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. What is its resisto; 6+fcmc 9(za6cia zgivity?

  Calculate the current through a 10.0-m long 22 gauge (the radius is 0.321 mm oum(1qmmwq wvk6a7.40q3nlm ; +psm j) nichrome wire if it is connected to a 12.0-V +lw qk n;0qjm31pm 6mqo4a.m7 wm(s vubattery. (The resistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and of rectangular cross-section,-efg*c ,dm4kz p23 sngh*qg n, 1.0 cm x 2.0 cm. What is the v g4 gmcd ,es2,-z n*phfgqn*3koltage 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 res5 9ovui f(z2vgistivity 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 wiret/ 3mk xcc(wlnc7r0y: (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 resistancevwgg5gy+9 c-qd8lqoq y*7vi 9 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 resis gr7xvj,e(hl: tivity 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 th)x, uij39iukizkj4 70t f3tmhe melting point of indium. The resistance of the pl4 0ku9fi3j3 7ijmk )u, tithzxatinum 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 throu u3+1hhiecl4rw chx 5*yzu)j/gh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. Wh/ edwfx.zo/t- at current will it draw?

  A 150-W light bulb running on 110 V draws od7e kfly(00p how much current?

  What is the nominal resistance of am*spvfb3n0/ qpd 5/ti- e +krc 100-W light bulb designed to be used in a 120-V circ i-bn+v/q 5p m f/pdtrcs0ke*3uit?

  A toaster is rated 800 W at 120 V. What is the resistance of its heating elemenni3a1nhejzyml/ 7:k4x:rh+ e t? :hhei :nlj n/7zk +3armyxe14

  A 200-W resistor is rateet c4xzu52x/ 2(ev nwpd at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated acj d1 ,lx.+sqgt $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what currenu8 u j:* q3nc:yfoe0cbt does it draw?

  A lamp uses a 150-W bulb. If it is useclh,8, +qx yvnd at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What is its resista.zve;:tj ml6e5u y qc1z-4kqgnce?

  How much does it cost to opera;ou ( 9zft4tjxte a 25-W soldering iron for 8.0 hours, if energy costs tt(z9oj;x4 u f$0.08/kWh?

  How much energy does a 100-W light bulb use v9j-ulbhm: y;-b mv)tin 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 7d rai3)ji(sn 2.0 hours. How much heat energy isajirnd7 s3( i) produced?

  A battery is rated at 12 V and 160 A-h. How much energy does the battery storq/g2 j bgs:m* xdqj(q-e?/ jq qg(qjmgd-s:b*x2

  How much energy does a*.apm fhuk 7gnqj9 d73 *s6lio 25-W soldering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming the powe:yw7r;,l4anz1 y.qfs rsj1z dr company charges 10 cents for each kilowatt-hozf: lqyjsw4nd ;s1r yr ,a7z.1ur of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0+r 3vesrg n*.g..rdae 9fz iyh 4jz8y0 hours per day. If electricity costs 10 cents per kWh, how much does it cosh 8z3.yy *s zg. f4agrd+9nee 0vjrr.it to run the computer annually?

  The monthly (30 days) electric bill included the 1 brj:;0 gazv6wre h38q1m+bbdmob o1cost of running a central air-conditioning unit for 2.0 hr/day at 5000 W, and a series connection of ten 60rabv:m63 1r 8ogj01ebo; hwqb zd1bm+ 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 hfnk7ld ke+15and 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 nhek1 l5dk +f7will the repair have on the power dissipated in the heating element?

  14 A of current flows th+on du(,gg .lz)wop4z rough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs2 7 h5lby eo;vxj:m,kb $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 u -ho(fibdb,:l0 jr7mwork at the rate of 2.0 hp has 60% efficiency. How much current does it draw from a 120-Vo, j:hbl0r7umb(d i f- line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 12npaguv-,0py(fk um900-V ac power source. What rms current flows through this m0upf(vy- 0 angu9,pk device?

  A 500-W device is connected to a 120-V ac powenq ns(y )ae*h6(v-b uqr source. What peak current flows throug ()eh-nn*qvsu(a6yq bh this device?

  A 500-W device is connected to a 120-V ac power soukc c/bf qwz52()gsd3 qoj+v: nrce. What is the peak voltage acrosg(zj:dvo ckb5f cs /+w2qq3)ns this device?

  The diameter of a copper wire is 0.081 inch. The maximum safe current itgneql o88uk/nd8 0uc- 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 cubic cen8/q-k un ucoe0l8gn8d timeter of copper is $8.5 \times 10^{22}$.)