A device that produces electricity by transfdjg , rz42as9e3w. xdjorming chemical energy into electrical rwe9ga42js3xddz j, .energy is called a

  A car battery

  The total amount of charge that passes through a bls0.hz6v6mcg b)a i5c y d50 qx.p,qfwire's full cross section at any point per d ,.s h60v6bmpz0lbcafq ) qig 5c5x.yunit of time is referred to as

  The direction of conventnbm75 al k0fx-/y7cm-/f mb dfion current is taken to be the direction that

  A coulomb per second is the sap(hrun4t*9)+ sl k7ejfl (wpex;gz4xme as

  Car batteries are rated in "amp-hours." This is a measure ofh a(/ymb(mvab+( oov ppt21+ rum,u5o their

  The resistance of a wire is defined as;(svgku*hio -

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

  The resistance of a wire mdy+y:sj3pp 5hx.v.kis

  The resistivity of a wir z r6qfzbt/0 1 wqbg/z/xa7slmtwo3+.e depends on

  Which conducting mater r/1il s/,ky6aaz4b/xf r:q geial has the lowest resistivity value?

  Consider two copper wires. One has 3/tw vqsbh6v.p g/wxt3x27io0 1u a gwtwice the length of the other. How do the resisp/b t.qowui 0wv hga 2x1tg7s 3vx63w/tivities of these two wires compare?

  Consider two copper wires. One has twice the length of the o 8osj++-ba0 sshs,wb mnsup -cwk4h:(ther. How do the resistances of these b:o ,s-8ss j- nwpk+shabhm(w+ 4c us0two wires compare?

  Consider two copper wires. One has twice the cross-sectiov. :i8kn.y3hws g u:(dv ,bqrxnal area of the other. How do the resistances of these two gxq8ydk:shunw :,3i .vb(. vr wires compare?

  Consider two copper wires. One has twice the length and twice the, z e0lx: guzlx:o3d:a cross-sectional area of the other. How do the resistances of thes a:zxxoe,: :dl0z l3uge two wires compare?

  The length of a wire is doubled and the radius is doubled.te2a0* bz8l jjra/ 3ccc98rzc By what factor does the39 jbzca8cte8 lz2j/c c 0*rra resistance change?

  How much more resistance does a 1.0 cmx;weh8d;ixt qvu3/ 6b diameter rod have compared to a 2.0 cm diameter rod of the;xu;t w86 xv/qb hi3de same length and made of the same material?

  The resistivity of most coz7igg oys0o 6,knvn5hk)x :q kjxv),3 mmon metals

  Negative temperature coefficienn9lh80:yuieo -w gt7 rl8fvq z ep++q:ts of resistivity

  What is 1 W equivalent t,+wcsn 5q:m gykuu0t9o?

  A kilowatt-hour is equivalent tfjnqihsz2vt6 x -23;g;i/i bso

  If the resistance in a constant voltage circuiah1 d/ bde*tda8)pchm:09 q g)ks u,tut is doubled, the power dissipated by that cihbkdhps :/0dtmgaq,9dae)u*)1c t u 8rcuit will

  If the voltage across a circuit ody:qn,*zw/1d ( m*k+vejyfmi f constant resistance is doubled, the power dissipated by that circuit win/j,iy ewzvqd*(mk+ d y:*mf 1ll

  If the resistance in a circuit with constant current flowing is doubl5bn, ;swbk+ eoed, the power disnseob5b k;+ w,sipated by that circuit will

  If the current flowing through a circuit of constant resistanceng a0vxzw; *.z2*u xk/dmb;nc is doubled, the powuzg .b2n;wm *z vcankxd ;x/*0er dissipated by that circuit will

  During a power demand, the voltage output is reduced by 5.0%. By wh2l trwv9fco )3qv /uai/nhq67ievo3+ at percentage is the power on a resistor affectedluw+ it7 vnfo3 /q q/3he9 rvac6o)vi2?

  A current that is sinusoidal with resfldmm ng9+ sv,;/ xu;apect to time is referred to as

  Consider two copper wires ead0mapp faw+ow, bx.3:egun:i .d59m t ch carrying a current of 3.0 A. One wire has twice theoppmwd:a: 5xug d, f 0.tein9+m3w.ab diameter 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 resistivity)gj,xk3lzyq0h j txy245v/jj-fj a t: becomes essentially zero at very low temperatures ar)2hvt-yqzflja,/5 j0xyj 3ktj4 jgx: e referred to as

  What current is flowil t;8mf*(a c1zq5hd)tv x2hktng if 0.67 C of charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus in 2.0 min. ln-z, 9 +6tdkliidf 8a What is the average currelz,d8 9ai filt-k6dn+nt?

  How much charge must pass by a point in 10 s for the currengc -kd65ce i8)4cbuc wt 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.zz(0he y orri))g1 ul 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, h3hxl8rjse fyi 2 .u:h;as been left on for 10 min. What is the net number of electrons that have passed throughsj2 lei yr.u:; fh3x8h the coffee maker?

  In an electroplating process, it is ekv8 ) kq;5ye.vy5mim 0x nn6hha i(5kdesired 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 to run to deposithxq vmk;8 h5k.eyv5ai6(yk 5n0en mi) this much silver? (The silver ions are singly charged, and the atomic weight of silver is 108.)

  What potential difference i*9.m 6dztwyx bs required to cause 4.00 A to flow through a resistance of 330 W?ty9wm*z6.x bd

  What is the voltage across a 5.0-W resistor if the curr cj,ow ttdd(1u1oc7+s ent through it is 5.0 A?

  A 4000-W resistor is connected across l+ ger*oj :6/aevv o,v220 V. What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What 4jkaz d: bva-1is its resistance1v:j bdz 4k-aa?

  A 12-V battery is connected to a 100-v 0k8buhwmk8zl 4gd(h3d:;3 ztbn0 ejW resistor. How many electrons flow through the wire inm4 80ubdlen8 v d (03;:zjth3bhgkk zw
1.0 min?

  What is the resistance of 1.0 m copper wire of dia/w4wg- yccn9-pzog l 0meter 0.40 inch? (The resistivity of coppz o-p9 wgcl 0n/g4cy-wer is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistancm wiucgiv9jec65 4 7(xe of a circular rod 1.0 cm in diameter and 45 m long, if the ruwmx(ivc g6j574ie9c esistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper2trkk6 od1lx+ wire (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 (resistiv6:u 5du:rx8liw2fn 7rgbs q*bity $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 resistivityxnymub, :x7y ;?

  Calculate the current through a fz(;j 8pfo )ej10.0-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 nicpo;8jfe)fjz (hrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and of,3z7x 8l.y flez0adwe rectangular cross-section, 1.0 cm x 2.0 cm. What 07wzya x ,.ed8f zl3elis the voltage 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 res1mnba bel 8q /o8/+zezistivity 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 coppepiwo 6e .:ng;4qo drw,r wire (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 reo bof6i4z4 v3vsistance 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 q 84enn33bgcjplatinum 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 the meltinbzh d5x)+lwu 4g point of indium. The resistance of the plaz+xd)4b5hl uw tinum 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 an vt1r/ v zg;im9mzyo,o55* dfb $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current wil:u l3e 5vyp7w 1dugx2wl it draw?

  A 150-W light bulb running on 110 V d5i8bwv*vr(jhr 3t/ go4nn w3xraws how much current?

  What is the nominal kf/g4);kl o nyresistance of a 100-W light bulb designed to be used in a 120-V circu)k /nl kgo4;fyit?

  A toaster is rated 800 W at 120 V. rt 2cd,: nby:dWhat is the resistance of its heating element,rd2n :t dycb:?

  A 200-W resistor is ratedpki67lg b)zvxob em8 f s-e(32 at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ratg7d(;h65r jwm xu czj,(kbua +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 current zrv h712uw aglc.3mt aw52bh. does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is it 2xsdcm1a.ex9wo./ryrqx0w) v v7. njs resistance?

  A 25-W soldering iron runs on 110 V. What is its resista5n )jm ig v:y9ci*kol.nce?

  How much does it cost to operate a 25-W soldering iron for-nvd1nec6s1 . h6 udbr 8.0 hours, if energy costu-1d6n6nh1.d e r scvbs $0.08/kWh?

  How much energy does a 100-W li q4kqa9tm)258hza u 3pgi sx6jght bulb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much heat ev i42nj3 ynmrdqr);d9 nergy iq y)ndn 3ji 4vmrd2;9rs produced?

  A battery is rated at 12 V and 160 A-h. How0)(0+ d y9xx xebiisyva3gs07kjsx.h much energy does the battery store?sh0x+bxs jg0 vayi(0y )7 93s.xkxe di

  How much energy does a 25-W soldering iron use in 8.0 g,y7 p uge*a5qhours?

  A 100-W driveway light bulb is on 10 hours per day. u/juu:.1dabed6( we 2*oiibo;.an vgAssuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the annua augiib (n/e 26;d:vjo odueaubw*1..l cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0 hours per day. If elex3zsa j-1a/ ;fhr pw fd01+hbbctricity costs 10 centsb;3w+0 f a-pd1 rj/b1 fhszaxh per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electric bill includev+ )l5ri 7mdziyoqc m.x4)3 gdd 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 fo))dy.+v5 7 cld z ix34mogmriqr 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 dr);hl) fz. czuiier 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 reali) z h.;lczfu)ity, 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 throei lf*; dkc :-yv23hteugh $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costsy2 e. rlqrup3iy j*ux426xz;l $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 had15- 7rlbx lwos 60% efficiency. How much current does it draw from a 120-V line? rdlb1low x75 - ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 119tj(q( g-agv mz pk;x20-V ac power source. What rms current flows through thispz 1(j(tgqg; amv9 k-x device?

  A 500-W device is connected to a 120-V ac power source. What peak current b/cs39oy2dvhz f8i b6 .tbce- flows throug2fbb6 d -vs.the/cozib38yc9 h this device?

  A 500-W device is connl0r bf;sa8nxwx mb.)/ected to a 120-V ac power source. What is the peak voltage across this b8.anxs0)r;/wlb xm fdevice?

  The diameter of a copper wire is 0.081 inch. The maximum sxdd kgv)h -y/+afe 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 number of electron carriers in one cubic centimekd)-hdgxvy /+ter of copper is $8.5 \times 10^{22}$.)