A device that produces electricity by transforming chemical energy into electrici1 /b ;klzm05l-wqv mpal energy is call i-5wll1;pzqk vm0mb/ ed a

  A car battery

  The total amount of charge that passes through a wire'sru9 +5ue k2q 7 oo/ll iqn,*.:msxcjxs full cross section at any point per unit of timek*5x7sq/or,qlm9n+u ce i.x slu2:jo is referred to as

  The direction of convention current is pk2qum1)x2h.x s(hp htaken to be the direction that

  A coulomb per second is th 3+yfovth: v0jz+vm:m37wn qje same as

  Car batteries are rated in "amp-hours." This is a measure of wu1n:b,) qduh/ mm8ygtheir

  The resistance of a wire ipy7sanmg 69w2vn7 wb/ l(u*c ys defined as

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

  The resistance of a wires eeeddp t5 t(ga (z7**9bn7vn is

  The resistivity of a wire depen/dz8.xq,2 +ztrtkv zlds on

  Which conducting material has the lowest resisti8* zav9zh8 h0)fkwi9 qz kwrp3vity value?

  Consider two copper wires. One has twice the lengtq9 rgd7p jkz;/h of the other. How do the resistivitie7d gj 9;z/pkrqs of these two wires compare?

  Consider two copper wires. One has twice thxob8 u7n 1q ma*gde7hgympdb: +9z2:xe length of the other. How do the resistancup:7x ndq8+ d bba:ye *12m79xgg zmohes of these two wires compare?

  Consider two copper wires. One has twice the cross-sectional area of the othep 0 .:qbo3lns* ;d 4t1qljlb4bqq ctk/r. How do the resistanbq 1;4 oq b/0qjq tsbpl*tndl.kl34: cces of these two wires compare?

  Consider two copper 0+2xd.d w a-phf*pni pb: uo/bwires. One has twice the length and twice the cross-sectiona *2if.x dn b-o+pphpwd/0bu:al area of the other. How do the resistances of these two wires compare?

  The length of a wire is doubled and the radius is doubled. By what factohstj k095o w(vr does the ot5s 09 jkvwh(resistance change?

  How much more resistan ;t3iuh)nfa+ f+ ngfp4ce does a 1.0 cm diameter rod have compared to a 2.0 cm diameter rod of the same l t;fniapg+4+h uf )fn3ength and made of the same material?

  The resistivity of motc+)cfric.h i85 w yw0st common metals

  Negative temperature coefficien n7hp:k0 4j;ptk ztey(ts of resistivity

  What is 1 W equivalent to? ,6+h9op+lbv um/ueoe

  A kilowatt-hour is equivalent tok hm;cz3h3k n),lhupi2h0g z 2

  If the resistance in a constant voltage circuit isu3pkk:tu 3q(5 a5glqp doubled, the power dissipated by that 3tuapkqq (pg:5l5u3k circuit will

  If the voltage across a circuit of constant resistance is ecwt5mu eze8ax*a9 ); doubled, the power dissipated by that c) tmucx w8;aez *ae95eircuit will

  If the resistance in a circuit with constant current flowing i ubsyw68 05fwys doubled, the power diswby5y0u 6 f8wssipated by that circuit will

  If the current flowing through a circuit of constant resistance is doubleu;v:f k3ai8q: (f94(q gktksk;ipuv x2d:kkb d, the po;b:kdi:kk 8;utav2iq(kp3k4u(sfx v9kg :qf wer dissipated by that circuit will

  During a power demand, nr 1fv(kd)e5bt 3mb-athe voltage output is reduced by 5.0%. By what percentage is the power(bb) n -k5 fdev3armt1 on a resistor affected?

  A current that is sinusoidal with respect to tim3okv: r30njs gd5v7zy e is referred to as

  Consider two copper wires each carrying a cur : k+zy/p.blkqrent of 3.0 A. One wire has twice the diameter of the other. The ratio of the drift velocity in the sm +ypqk /zkl:.baller diameter wire to that in the larger diameter wire is

  Materials in which the resisti3enfd,48x nev3 ci2 yuvity becomes essentially zero at very low temperatures aru8 v3yxefn 2n e,cdi34e referred to as

  What current is flowing kaextgsfk-z9n, +h;e /fx+1k 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. Whasu8 y*il sygmv.cl2/: t is the a:ul*cysl8yvgmi /. s2 verage current?

  How much charge must pass by a point c t/ 94;axyw.wv(uhy7xie e9g.yjwy. in 10 s for the 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 flowao5en2;6.hbgpy y /-/to mmdzing 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 ,g2yfdmqb )z0A of current, has been left on for 10 min. What is the net number of electrons that have passed throughmfdgq2 b) ,0zy the coffee maker?

  In an electroplating processw:xkn hm/omg7i; z06 obwu;, s, it is desired to deposit 40 mg of silver on a metal part by using a current of ub,/mw0gkznm x oo;7h s6 w:i;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 weight of silver is 108.)

  What potential difference is required to cause 4.5+weww8cm1 +jwn zl:c 00 A to flow through a resistance of 1w+: 8lwn m+ec5wzw jc330 W?

  What is the voltage across a 5.0; j3*mlgzv-grydh-kn9q b)(n -W resistor if the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 o d;olx 6stwr,;5juh, x zibot59t5vo/ycf37V. What current will flow?

  A light bulb operating at 110 V draws 1.40 A) yhjpx 0y,dv) of current. What is its resistance?x,)h0j) dy vpy

  A 12-V battery is connected to a 100-W resa*v:m a,)(u hh8:aft( k p5xtvtda;lzistor. How many electrons flow through theaxz htl(a:,upt8 )va5(;fmah :k*vtd wire in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter xew9hne6 f) k*pwgae,.wm a8b: 9ah:b 0.40 inch? (The resistivitwhgh ab8.wee*we)p::bnma a , 9f 6kx9y of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistanceivdea p,l31-c of a circular rod 1.0 cm in diameter and 45 m long, if the rlp, acvd13-ei esistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wiregky 02vr;g;4 btwgr ,m (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 (resisb*,0iz,xl u putivity $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 oh8r) *luhyy aa.ms. What is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge (the i lqc8k ,s1d1p0enp(d radius is 0.321 mm) nichrome wire if it is connected to a k0ldeinsc,8pdp (q1 112.0-V battery. (The resistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm lonchei q4l xn1;ue/28 -l7o hvang and of rectangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carro hhncl8e2uav/q4 xi-le;17 nies 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 gp50p0bp* pncp*t-mx x gwb ,5hf8cez;znw7 ;mm 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 ,y l 7myyhs*.kle4b*vonyz 80n)fg.kvity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resisjcjruka6migz)mv(-;v; i5d( 7y vf1 btance 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 +a 0)5zmvy- pyzkpw2aof 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 tokzbf4c;w a00d b3b,bo determine the melting point of indium. The resistance of the platin0ow;bbbc k ab0f, 4zd3um 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 througumzpea sj,,tq/ oj1yk+9p , h0h an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rateb. 1i.y20 u wuwlkk6vt1utqo2d at 1200 W. What current will it draw?

  A 150-W light bulb running on 110 V draws how much curruw.6tlh6 gy*bob d j/6ent?

  What is the nominal resistance o4k(g-jzgj qk1f a 100-W light bulb designed to be used in a 120-V4 k1 gkgqjz-j( circuit?

  A toaster is rated 800 W at 120 V. What is the resistance of its heating elem1 b+- kav(a64rj,pb6xmj fqau ent6+bakjm(raq upv j,ba -4f16 x?

  A 200-W resistor is rated at8 qcklb(/ ;xw0cn ij+r $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ravla 3x hp5*g5oted 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 does itm):l 5guky ts(wp(*vs draw?

  A lamp uses a 150-W bulb. If it is yz+z)/ ;-le xqbf5.aijfpl g5used at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What is its resistance?w0 6+rde5 jbwszt))bv z6ir hmu/ 39gi

  How much does it cost to operate a 25-W soldering ir vv9x--wy+tp 0+dc lrion for 8.0 hours, if energy costs v +pid-lw-r0y9 cvtx+$0.08/kWh?

  How much energy does a 100-W light bulbf4z1 cd3c av8g use in 8.0 hours?

  A 1500-W heater is connected to a 120-V linhx8ur u.iqnz 90x9hkfu4z7 8p:8lopu e for 2.0 hours. How much heat energy is produce79o.r8 89hq hf:8i4x0xlu u kzpunu zpd?

  A battery is rated at 12 V and 160 A-h. How much energy does the battery st6 ,bjktc)jm )pore?mcp)b) 6k j,jt

  How much energy does a 25drq a-dcj5rjdf/y h*9i 2 4ay,-W soldering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per*/ug9qbx38t.*fjow 1 xnz8ri1 n usgb day. Assuming the power company charges 10 cents for each kig 1o8qzb9w.1ru*ftb/j n*gi s8 xu n3xlowatt-hour of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer ueg2l9rg96cx plus monitor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to run the computer annualgr2l 6 xgu99cely?

  The monthly (30 days) electric bill included the cost of runningp8p *1qpm e xhxra)mhrgk p.,x5h)6x: a central air-conditioning unit for 2.0 hr/day at 500015hpq xp)e6xa r ,rhxm 8)kpxgm:*h.p 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 operates on 240 V an:+ll zb4vu4jiyyt4(ts4( c eoi:b y7md generates heat at the rate of 2.1 kW. The heating element shorts out and, in repairing it, the owner shortens the yitml y::v(ce 4i(t 4lj+u7ybozs4b4Nichrome 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 element?

  14 A of current flows thr.y+b: b4wbq7 7jcgw glough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs e ly7:0:6n4lysutsi p$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 much cur.v n mp6dc5fg0rent does it draw from a 15fg vc0.6d npm20-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is co 7qao./la4r yjnnected to a 120-V ac power source. What rms current flows through this devio7lraq4.aj/y ce?

  A 500-W device is connected 9y men*g3a0dqto a 120-V ac power source. What peak current flows through this 3yq9d*em g0nadevice?

  A 500-W device is connected to a 120-V ac power so h2 cfif v(*wtitv k,f33/y8xx/x,p) l6yglf murce. What is the peak voltage across this dev/yxx v,ll,)f ki(xwgfftf3 *c6/pmh itv 382yice?

  The diameter of a copper wire is 0.081 inch. The maximum safe currentvf;/m9ktlg1nk d s7u0vr. 0)e3hg utg 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 one9 0/3tkg7f dkv .sgtumvl 1grn;u)h0 e cubic centimeter of copper is $8.5 \times 10^{22}$.)