A device that produces electricity by transformig w;o1uj1p rf0ng chemical energy into electrical energy is calle1ugp jrw;fo0 1d a

  A car battery

  The total amount of charge that passes through a :* ryqr0+ llvkpj d58kwire's full cross section at any point per unit of t rkyldl*8+p 5:0vjrkqime is referred to as

  The direction of convention current is taken to be td z08 08q 9/dpckzcgcikzw+ z4he direction that

  A coulomb per second is the samer1k )as3 t ;4j0at x:cf5vqll a,ct+sk as

  Car batteries are rav 8(e+k qq1)zg h)*yub 7kvvo/yb2td hted in "amp-hours." This is a measure of their

  The resistance of a wire is defined adnx ,s-p).os)mn* j8j ;; ocmlk ckn+ps

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

  The resistance of a qg qz -7iapw04wire is

  The resistivity of a wire bmil6;xhd6 w.)yx,r m depends on

  Which conducting material)vj3 h-hx, s n9 gseu;uv0jvs3 has the lowest resistivity value?

  Consider two copper wires. One has twice the length of the other. How do the /kou jmcr9d bm+e:;69 .mu:pyp , zpeiresistivities of these two ,u ocpr di e;+y:mp:bz6um9mj pke/.9 wires compare?

  Consider two copper fz5/ 5x8rvttihy;am- wires. One has twice the length of the other. How do the resistances of these two wiarhvzt f8it5;m 5-/xyres compare?

  Consider two copper wires. One has twice dhbyr le.4 jlh;,x3 z,the cross-sectional area of the other. How do the resistances of these two wires 4ylb,3 ez; dh,jlhrx. compare?

  Consider two copper wires. One has twice the lengt ,lv:n6 l7mkrs(fwzb +h and twice the cross-sectional area of the other.:bls, 7k+wfr(6zv m ln How do the resistances of these two wires compare?

  The length of a wire is doubled and the radius is doubled. Byvu*jq3q.lz85lpjp1p)g a m k.t0r .3me/jqh y what factor does the relt3j.yuq 0 /ev.m zjqrp53p*g) jq8a.mh klp1sistance change?

  How much more resistm;.g 1yckl k0 19url kgd 2(ck(0lt 4l0toplxdance does a 1.0 cm diameter rod have compared to a 2.0 cm diametep02ktk0l9ug0.l rd ky1c((dtllc;k xo m14lgr rod of the same length and made of the same material?

  The resistivity of mosm0 :l0a(cbp tip;*uspt common metals

  Negative temperature coefficients of resisti;7rj r(ou. vonvity

  What is 1 W equivalent t7mm mm5-nrc(po?

  A kilowatt-hour is equpwtz-lb de8-+ ivalent to

  If the resistance in a constant voltage circuit is doubled, thegpeyx.s2dg 2txej6ey 69t ;d/ f(f*hb power dissipated by that circui.ff2sexh6 j gytbty/gxed*( e 6;29dp t will

  If the voltage across a circuit of const-ap+a k)j ufqgl0o/ ,bant resistance is doubled, the power dissipated by that circuit wbfo,ua lgq/k-+ap 0 )jill

  If the resistance in a circuit with constant curren6eh bphshw /ts843wb6t flowing is doubled, the power dtew4 bs38ph6h /bsw6hissipated by that circuit will

  If the current flowing through a circuit of constant resistance is doubled, the-y- y)2wv8ylm1 honl l pow-8n )2yll vmyy1w hol-er dissipated by that circuit will

  During a power demand, the voltage output is reduced by 5.0%. B cozf86sq7; ylmyz859xtai y1 y what percentage is the power on a resistor affect 9lxqa 8;o5s1y7y zcyimt68fz ed?

  A current that is sinusoidal with respect to time is referred tt cp2o82j n9*z:p + ssqfec*( fmo8wrqo as

  Consider two copper wires each carrying a curre-bcvw1,f.ap4 ea4 fv jnt of 3.0 A. One wire has twice the diamev,-c1.ffpbwe a4 avj4ter of the other. The ratio of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivitydgol*-2 gm,k hw2 q): kudtn q+vr(y)y becomes essentially zero at very low temperatures are referred tng*g2 d( +yq,h q)tk2) v-ou rlykmw:do as

  What current is flowine6* y:)waza4j3 yqr btg if 0.67 C of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplat)cpe+k. cd0zs ing apparatus in 2.0 min. What is thes 0c.)e+c pzdk average current?

  How much charge must pass by a point in 10 s for the current to be wbuske 3z bgzy):n)((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 flowim4/2ogfl3* hcv5fvxetv-q )p ng 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 dr o,gj ikx : fb2zup80jl/ns57aaws 13.5 A of current, has been left on for 10 min. What is the net number of electrons that have passed through the f5gp/0uk:b2sxn7l iz ajo,j8 coffee maker?

  In an electroplating process, it is desired to deposit 40 mg of s e/v:do-w ; .fra.dpzhilver on a metal part by using a current of 2.0 A. How long r:e/ .d.zfv h;wop- admust the current be allowed to run to deposit this much silver? (The silver ions are singly charged, and the atomic weight of silver is 108.)

  What potential differencffku s( eb 59bu8p6tj1e is required to cause 4.00 A to flow through a resistan k sje f(u8b5ft6p9b1uce of 330 W?

  What is the voltage across a 5.0-W resistori . u6c-, d.bbk/jwzic/hxm b/ if the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What current will flowo(h bame;*k/fnfh* z 6?

  A light bulb operating at 110 V draw jc9m8gn: ,dl1ib8s/ cny3w jhs 1.40 A of current. What is its resistance?wimj/by dj8l8gs,h cc 3n:19n

  A 12-V battery is connected to a 100-W resistor. How many 0wzprj:5mgv d 3c(2lxy2.qbo tf4kt(electrons flow througmrt fxlcy bo:gz4qp 3w52kj2((d. t0 vh the wire in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0.40 incoit0w4 ;f1pcr0gkq2 yx gkk ys8ufc 73v.8.wbh? (The resistivity ;i cx 3wr.u14sktfpco0q2 ky08.gy78f v wgb kof 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 long geb+ /xait 0+k:+wdtj, if the resi+ itk e +x:d+gjw0/tabstivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wirj6e ef9xxdza dh(/ ;8ce (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 wi,wz:ezir3 1p tre (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 resisti8t-w.87hz7t gb wku wevity?

  Calculate the current through a 10.wlt2kh ax+ l:bo( a:j10-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 nichrome 1(h +b xt kwla2aljo::is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and of rectangular cr6l;g9fa0 hif jnd ne,k 96.b:5t(y eyg k*dkdboss-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carriedy;k 5h6k( be: ygtdf90nbf a*i69.,jgd nkels 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 mmg9jo b0:icz zd ab:b hb31kz0, 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 (resisti mk*isgpzmp,uca :z7v 6+g0.e5yq9pavity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistance rk : w7okc.0 , i,5mi fb8dv05aeik w8xy(oiajof $18 \Omega$ 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 platinu.1 ,2,)j:nyuppsum eeb /cvcgm 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 u+4psh6-lenzl7 qsl 0xz37 vt the melting point of indium. The resistance of the platins xez6z4tu7 vs l7 3p-ll0nqh+um 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 a,(f cgxx+qznipje8646a kr uo6imx wb7c0-;q n $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current will it dzl2yuwr 4gm3v o,*2um raw?

  A 150-W light bulb running on 110 V draws how much cnrg(kmz mgu04yh wg4;-ml+d6 urrent?

  What is the nominal resistac ,b/3z9mtw mr +pd7rhkoyae0dnu4:d4p t/j: nce of a 100-W light bulb designed to be used in a 120-V cio/t:m 9:z+dywn0p r4j b/ kdm3tdhare4uc,7prcuit?

  A toaster is rated 800 W at 120 V. What is gax. 7(cw 7m9w)sirfcthe resistance of its heating element?7 w xsrc)7mafig( 9cw.

  A 200-W resistor is rated s-xmve kuum53t. 0 (zoat $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated h 6zp 3vf( m*e+-cnnctat $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb0. mqho8c / dsqx)xc1t8n5:r0ulz agb. If it is used at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it is used at 1 t1bbnsj5t81r20 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What is its resiscww2 o157v5)wugyne 5d bb4ctl 7ygs/tance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours, if pv1z7fsn91)cgx a- vh energy costs -s1p7avh) v 1 zcfxgn9$0.08/kWh?

  How much energy does a 100-W light bu/ ojomk*w.rho ts6a)6th(i f4lb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line0qzo6had*.f(h b7nb l for 2.0 hours. How much heat energy is produo b70 b( alfd.*6zhnqhced?

  A battery is rated at 12 V k g1p, v,dd+ f dmokgllju61/.and 160 A-h. How much energy does the battery store? dgl6. ,d f+pgdu, mjo/kl1k1v

  How much energy does a 25-W soldering iron use in 8)d6 kjhb3m+spi l o )d,irl,h).0 hours?

  A 100-W driveway ligb.8ftg 3azyjqr- 8n6m8f w9kp ht bulb is on 10 hours per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual t8a. f mb8wzryg p3 jfq68n-k9cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0 hours per day. If ele l1g(4/ bptmnlctricity costs 10 cents per kWh, how much does it cost to run th(bp t/l14lmn ge computer annually?

  The monthly (30 days) efi *n/ub; kkd,lectric bill included the 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 the;kn,bki*dfu / se items contribute to the cost of the monthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element in an electric0kw4a l*bgl j- drier operates 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 of the wire will depend on its temperature.) What effect will the repair have on the power dissipated in the heating jla0wb*g k-4lelement?

  14 A of current flows through b)nyi;ik1mo4)y myk. $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery cost1c 4iz-oirhvln50. cz ihor8 :s $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 0i6guvjtui/55tfxj+ much current does it f6iuivj5 50+g/u jx ttdraw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rms curre5sp8m43p ro5ajm wp4 ant flows through this de4r a8os4mmwpj 55a3pp vice?

  A 500-W device is connected to a 120-V ac power source. What 1x2p 3shjk/nppeak current flows k1np sx3j2/ hpthrough this device?

  A 500-W device is connected to a 120-V ac power sour -qa*6c m mz p:rk+:)idtqvq 3b;k3s;y ihdg5qce. What is the peak voltage across thzkic mr+ds3)3 g *q5t:h;qav qqp md6i;k-by :is device?

  The diameter of a copper wire is 0.081 inch. The maximum safe current it cafp-gq z)w: ,qun carry (in order to prevent fire danger in building construction) is 20 A. At this qz:u fw ,g)-pqcurrent, what is the drift velocity of the electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)