A device that produces electricity by z .2od nlu*12xxs.ckq transforming chemical energy into electrical energy isoq 2z*.sc nkx1 xd.l2u called a

  A car battery

  The total amount of charge that passes through a wire's full /h*vcaz tiu -b8f9ln/cross section at annau l9hzt f/ v/i8cb*-y point per unit of time is referred to as

  The direction of convention current is taken to be the dire2kpe (xp xh2d(ljbu;4 ction that

  A coulomb per second is the sameta58soidms )1b*q m1it6w/0x o-natm as

  Car batteries are rated in "amp-hours." This q:r0nps89rkw is a measure of their

  The resistance of a wire is defin1r/gm. g,qds9 r0 wkbme,;vsh ed as

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

  The resistance of a wire ihjuq )kc 428dxct/ a(rs

  The resistivity of a wire de ulkm0y5 tjc13evrw1. pends on

  Which conducting material has the lowest resistivity va+ bl:q,otf2a zlue?

  Consider two copper wires. One has twice the length of the other. Hg/l6 .0df zt3 zy, 8tw3njpskvupif 27ow do the resistivities zg86tdsfl yiu /0pz7 ktf2w.,3n j vp3of these two wires compare?

  Consider two copper wires. One has twiov7 *vs9pzrawbv * t.(gc 5m5oce the length of the other. How do the resistances of these two wires coz9vcomr t*vbs7w5 vp5 o(g.a *mpare?

  Consider two copper wires. One has twice the cross-sectio 1ic3;cydcu (mnal area of the other.i y1um;cdc(c3 How do the resistances of these two wires compare?

  Consider two copper wk ut. om68jj+xires. One has twice the length and twice the cross-sectional area of the other. How do the resistances of these two wires comj.o8 mx+ku6 tjpare?

  The length of a wire is doubled and the radius is doumqok*c x8jbi,b jc)x)jiu( 7e2aria291l hj 1bled. By what factor does the resj2a1hc )2)7m1i 9bolrcji,jx 8i(*b eajuxkq istance change?

  How much more resistance does a 1.0 cm diameter rod havvh27c77 g i+/ z pcf625di sjem8kornke compared to a 2.0 cm diame n2omkri e /ig6pczk5787c+j dv s2h7fter rod of the same length and made of the same material?

  The resistivity of most commjk , +1dqmgz0 ue/ u)*8l8/rj ysdhbaron metals

  Negative temperature coefficients oy4zvh) n2sc5 tf resistivity

  What is 1 W equivalentd2 iz.o/h trx5y(r-lp to?

  A kilowatt-hour is e-j03-7d bv *vfrv l3iza;ru zzxdss/;quivalent to

  If the resistance in a constant voltagu8vom;)2xjid.a pe7 h,m:1 jdddhm 3qe circuit is doubled, the power dissipated by j8 v mu.d7;ddj h1ox) m3hpm,da:i2qethat circuit will

  If the voltage across a ci (sq.fmm3 hko2rcuit of constant resistance is doubled, the power dissipated by that ci3 qhsm2.o fkm(rcuit will

  If the resistance in a circuit with constant current flo, ty3qli7vu ms 1;-sf owm3o3qwing is doubled, the power dissipated by that cq3 -st owm3,i1muvso3 ; 7qylfircuit will

  If the current flowing through a circuk +a2r3r lq0rch3emr(it of constant resistance is doubled, the power dissipa2ra +hm3re 3lrk0cq r(ted by that circuit will

  During a power demand, the voltal;cbkckv 3* y35oft1cge output is reduced by 5.0%. By what percentage c3kk *vfcby3;t 1o5lc is the power on a resistor affected?

  A current that is sinuc 6;zb)xnzts9gsj1klxk f() k5s40cfsoidal with respect to time is referred to as

  Consider two copper wires each car9yeu,;,guqeay y cua 1k9,. yorying a current of 3.0 A. One wire has twice the diameter of the other. The ratio oe;u,e9yao,gkc ,u.y u19 a yqyf 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. 5.okoef9md tperatures are referred.fde9o.5 o mtk to as

  What current is flowing if 0.67 C of 6t 5lu,bbrl*t charge pass a point in 0.30 s?

  A charge of 12 C passes through pr1okx4 ra 39 pwmh4.fp -7db 9n7xtwpan electroplating apparatus in 2.0 min. What is 79-.dh wprp7 wx34t o4f9xp bnr1ka mpthe average current?

  How much charge must pass by a point in 10 s for the current to be 0a js+6 )tw/3u0qgibmq.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-pucm1q:/p yi8sd :91 ysyhre 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 been lef-0nfr* :jj)6zo ssbljt on for 10 min. What is the neorzls nbj6fj0:s- )* jt number of electrons that have passed through the coffee maker?

  In an electroplating process, it is desaxlu/hcrq y 14) v3et5ired to deposit 40 mg of silver on a metal part by using a current of 2.0 A. How long must the current be allowel3t1ra xu5eh c 4v/qy)d 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 cause92c b9/ jtauqm 4.00 A to flow through a resistance of 330cj9qmab 2/ut9 W?

  What is the voltage across a 5.0-W resistor if x):gfj;c 1dhpi (s5;1r xbisnthe current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. hz 2k plw zfz16 (r,jz6q3n.ki What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its resistanc4;nmtycl v: 41or6ijket1ikm;c: j6y lor4nv4?

  A 12-V battery is connected to a 100-W resistoa/p ;h(1q qfrir. How many electrons flow through the wire iq p(1 q/ar;fhin
1.0 min?

  What is the resistance of 1.0 m co1flm(jjo 5 cu0pper wire of diameter 0.40 inch? (The resistivity of copper 1j fc0( ojm5luis $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameteriit k9gevu2:z a:1w3s and 45 m long, if the resistiz9iwva:2 tk1 3sgeiu: vity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper c -;f.57+su 9m,ftwcpyahdqk r;qo l3 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 (k iz /0 6)whzbteu;be6resistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0f9m ergmw;6iuf1w1g ; m long, measures 0.040 ohms. What is its resistivity?

  Calculate the current through :h); mau wf 1zz;uh e)bxuk0o*a 10.0-m long 22 gauge (the radius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. o0k1;) *uueh:maf zwb xh;u)z (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, 1.0 cm x 2.0 cm.hwym,)2ph+5.9 oc8v 4tq yanja3nf q o What is the voltage drop along itw c).o5 m2qn94oha,y+t 8qh3jvfnya ps 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 raccvlyx: (,-8ce 1igazdius of 0.50 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 gmc+bsuwo 6t r3 v 4e,r9pp 8*(z2eatxwire (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 ad -zh1; ti)xnf ay*ok*(zvl3 l 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 plat -ms4e(m9ltpk inum 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 melting pointbo 911-mj:.ks/finh zzk;c ydk;t f a; of indium. The resistance of t; z 91d -;/n.mz:hacktk fy1f; ibkojshe 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 throet --,-qfb+ hsz2b8i fvqp-y7mfqo: mugh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What currebv4fs2c/:jqiduk ..m r/edm 5nt will it draw?

  A 150-W light bulb running on 110 V draws how mug4nctsq a (gjd;/hk ) nmeo0ib8)g+,kch current?

  What is the nominal resistance of a 106px ,mm/gfic 1e)vze;0-W light bulb designed to be used in a 120-V circ/cezf ;1gx, mip6mev )uit?

  A toaster is rated 800 W at 12.xza psxm /4b3z*x2 zr0 V. What is the resistance of its heating element?a4rx3s.zp*xb zx z2/m

  A 200-W resistor is rr*aed qan,un)c)gv*3+z p nw, ated at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is r2jia93iu9c f e):r ih9kpso/ qated at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at kl4 konh+y 9+f120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, wie 1. behul/;what is its resistance?

  A 25-W soldering iron runs on 110 V. What is its resisvdwy2x) h )(hd ax0q5rtance?

  How much does it cost to + 3fyt2 wezdy)-wc v1x s5tbhws*5l, xoperate a 25-W soldering iron for 8.0 hours, if energy costs,x5s ywvd)w b5f2 1xche w3+tzy t-*ls $0.08/kWh?

  How much energy does a 100-W light bulb use 5r7 lyr* jg-jr- 7vepzhy8st; in 8.0 hours?

  A 1500-W heater is connectemq/oq2g dwv rr kh42j-ci0e.1d to a 120-V line for 2.0 hours. How much heat energy is produced?r1 .ec-o 4vqhwkdgj/2mr02 qi

  A battery is rated at 12 V ;ka5b)ku -p xzvvlu ha* l8w77and 160 A-h. How much energy does the battery store?ul8b-5 ak;vv)uk7ap* 7 lwxzh

  How much energy does a 25-W soldering iron use in 8.0 hourf5hxg00 9d(o1dkn cuzs?

  A 100-W driveway light bulb is on 10 hours per day. Assuming the power compan8n8p0rexwnb)bm *q g9yr8 f(p y charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to (pg*xry8 fqe0n8 b)9rmwbn8p operate the bulb.

  A 400-W computer (computer pl h4wb89 a+rosrwf0tm1 us monitor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how 041w89hs motrfa+wrbmuch does it cost to run the computer annually?

  The monthly (30 days) electric bill inclu0jfl27d a7ne ided the cost of running a central air-conditioning unit for 2.0 hr/day at 5000 W, and a series connection of ten fleia7n d27j060 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 ele(vf y6u rv6s+kctric 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 dissipat6f kry+vu( sv6ed in the heating element?

  14 A of current flow0e 0lo(p6r ccbee1 awh1rj6s,s through $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costsz maoiu +;xik+ +4nm873uvhib $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 wojn;449 muvo gurk at the rate of 2.0 hp has 60% efficiency. How much current does it draw fvm4 g;ojnu4u9rom a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rms curp; d7sjjk1 b)frent flows thrjkjpbd1;s 7 )fough this device?

  A 500-W device is connected to a 120-V ac power source. What peak current flow leyv c/uy;3t(s through yy l t3;/v(cuethis device?

  A 500-W device is connected to a 120-V ac power u6 nk1mb fgy64:m+/ n,axwpg hfiu+u0source. What is the peak voltage acg+4u,yugab606fhmu+ npwnx f:ikm1/ross this device?

  The diameter of a copper wire is 0.081 inch. The maximum sef *s.36btlrpb wa *ms-y(/dqhi x1b7afe 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 centimeter of copper iypbrie1*sl dm*a 6 7/ b3(xwhb-st.fq s $8.5 \times 10^{22}$.)