A device that produces electricity by transforming chemical energy into el( +58w-sx.odo8vv aca5ld celectrical energy is cel v-o5vdaoc l+x w8s5ac d(.8alled a

  A car battery

  The total amount of charge that passes through a wire's:p4nw 99rb ox5xgtc+t jp47j m full cross section at any poin5bxoj g4w :4xcnptmjr 79p +t9t per unit of time is referred to as

  The direction of conveno(fhy q(0b+u5g sw 0kstion current is taken to be the direction that

  A coulomb per second is the same apj -(-w6 hmgag:- 6 nys0fvpvgs

  Car batteries are rated in "amp-hours." This is a measure9tuy3g8 qceo:g) :w bg of their

  The resistance of a wire is defined rj pzjtk7jq+t4k;ywn1b8b; .mzk.8s as

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

  The resistance of a wir clq;7dp x:h0x-c-njr w**c/*3 d ku7feqqqnie is

  The resistivity of a wire dependoz+sqcag y+ (*s on

  Which conducting material has the lowest resisth+rqqd(l8g 2zp6*qm aivity value?

  Consider two copper wires. Oneh x*jxcus(s +;-umrzumd8* 3u has twice the length of the other. How do the resistivities of these two rs+**mu( zuxu 3c8 jxsm;dh-uwires compare?

  Consider two copper wires. One has twi+idkx) +wzb /ece the length of the other. How do the resistances of th) w b++/kexdizese two wires compare?

  Consider two copper wires. One has twice the cross-sectional area of the other9o*yz -/ozwc cs0*rdq. How do the resistac0qw*zd yzo9-c*s or/ nces of these two wires compare?

  Consider two copper wires. One has twice the length and twice the cross-sb t9r1*tc o:xmectional area of the other. How do the resistances of thes9 b ttxco*m1:re two wires compare?

  The length of a wire is doubled and the radius is,q.c 4 kb1c9f -tkwb 7ywumbhi4/l*sl doubled. By what factor does the7tm.-k/1blc4wl4if,qkbh w* scy ub9 resistance change?

  How much more resistance does a 1.0 cm diameter rod have compared to a 2.0 cm d-8m.vc fqn:ju iameter rod -v mn8cf:.uqj of the same length and made of the same material?

  The resistivity of momu: b 1x5xgdf*st common metals

  Negative temperature coefficients o.tb 6hds-v6 ,hs( vkupzv0/khf resistivity

  What is 1 W equivalent to?hu 42pu9)u0 wez0m1f ls shk7l

  A kilowatt-hour is e8 )pmyagf x:u5t39zy i; 2xgoxquivalent to

  If the resistance in a constant voltage circuit is doubledph4 6d:er ia5q, the power dissipated by tha4e :6dripq5 aht circuit will

  If the voltage across a ci,-fv*z uqmf ;gxkh,* wvv2c:e rcuit of constant resistance is doubled, the power dissipated by tfk v ;*fe, qw*z: vgv2-muhc,xhat circuit will

  If the resistance in a circuit with constant current flowinrgehby3 ((y)p 6gee5g bqg ;c0g is doubled, the powehb(gp0re 3q)gbe(5 y c 6g;yger dissipated by that circuit will

  If the current flowing through a circuit ofb 4z-w)xsnho) constant resistance is doubled, the power dissipated by that circ) zw-n os4)xhbuit will

  During a power demand, the voltage output is ckx 1v;mv nf.5sa* b7yreduced by 5.0%. By what percentage is the power on a resistor affexk cm vf5n;7s .y*1abvcted?

  A current that is sinusoidal with respect to nnz l7ak.mh8i c2 bg5*time is referred to as

  Consider two copper wires each carrying a current of 3.0 A. 9x .ckqjwb- w8k4 enaalx,))/rg yj o(One wire has twice the diameter of the other. The ratio of the drift velocity in the smaller diameter wire to that in the larger diameter/9g )e.n xwrx-j4w8( )qlaabc oyjk k, wire is

  Materials in which the resistivitq )ur o 0iiharkaq(4j* j0f(+iy becomes essentially zero at very low temperaturo04) iqa rjh k(uij*ia (+rfq0es are referred to as

  What current is flowing if 0.67 C of charge pao3qz5 j58 xiyvss a point in 0.30 s?

  A charge of 12 C passes through an electroplatinc4 vv5l)ar2htg2cv. a g apparatus in 2.0 min. What isv22.v45vl chat )g car the average current?

  How much charge must pass by a point in 10 s for the current to be 0.50 A?mavb oz8q820z

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

  What current is flowin*u9rh) 9/zy-6atp iq-scx4zu rcaykki05 x8bg 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 left on i7i f hivl6b3m23jf6zfor 10 min. What is the net number of iz3vi i3jh bf62mfl76electrons that have passed through the coffee maker?

  In an electroplating pvj)2+b lxsb; srocess, it is desired 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 deposit this much silver? (The silver ions are singly charged, and the atomic weight of silvjx2 sb)vb ;sl+er is 108.)

  What potential difference is required to cause 4.00 -(-ga sacwnp spk7k9i)ve(a4A to flow through a resistance of 330 74eanipp- k-(9 sw csvg()aakW?

  What is the voltage across a 5.0-W resistor if the curri3hj1vin. z s5o+t1veei 45rv ent through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. xor:fz5hce sv.62 m2qgx.qx n3/yo9u What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. Wham89ve2i au-( j 9rajxtt is its resistance?ai89 rvjm euj-2 xt(a9

  A 12-V battery is connected to a 100-W resistor. elt. 0reeomh;: tni4;p1 tb8 cHow many electrons flow through th1h8 :cel;e 0 .mt b4pitn;rotee wire in
1.0 min?

  What is the resistance of 1.0 m copper wir s ()(99s x/bia,dwcqtzk xp4ae of diameter 0.40 inch? (The resistivity of copper /bx9ctd 9z,(ap xi s(w4as q)kis $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameter and 45 m long, if t95 tv48v y:rjp(ld,)rndu fuohe resistivity ist r:lv o5j49( u,)d vnupydrf8 $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resist;p3 nda2ztj( vivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (nc 9i wbkp214sresistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 m l+jtu ke3n;.46 w6p ad txdlvl+ong, measures 0.040 ohms. What is its resistivity?

  Calculate the current tb 8mt75;bx5 x824gt v apmuuswhrough a 10.0-m long 22 gauge (the radius is 0.321 mm) nichrome wire if it is connected to a 12.0-V batterymuau4 ;g 5vtb8m5p x s7t2wb8x. (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.g fm 4ov 58hi-qyd,ki5 What is the voltage drop along its length when it carries 4mvkid455,yo 8q-hfgi 000 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 0.5 wag9u64a;g0qk- xjl7ewn-hb0 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 (resis okh 89kggak*0tivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor hasijra30p .,y-wym 8o lg a 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 dx2;xti x7qpenv t:7mx2k((jq04 h yjof resistivity 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 determr ,4x)xo*baufine the melting point of indium. The resistance of the platinum wi4rbu ,xoax) f*re 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 throudfzm9kis:)066vr q vhgh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What ci f /j+5yb 0*jfpz1lmzurrent will it draw?

  A 150-W light bulb running on 110 V y,uk0zuu)h 8gc cl ;/qdraws how much current?

  What is the nominal resistance of a 100-W light bulb designed to be used in a + b1muh,q+vmi;nsba. r gq3k 5120-V circ15vi;n rb 3hsmk.ub+a,+mq g quit?

  A toaster is rated 800 W at tuhlg ;1qg2i,+ iulu 3120 V. What is the resistance of its heating elemenuiq3ht gu+u,1 li2;glt?

  A 200-W resistor is tgj 5k:aqk3.drated at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated a v2 b+bh c ujatu+5v5owv6f9c8t $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what cuzblo ,.mogs 46l;lg:jrrent does it draw?

  A lamp uses a 150-W bulb. If it ib.(ga cl-h *n6 hkxkx(s used at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What is ie 7/: 27hu r5qytg)7feickxt its resistance?

  How much does it cost to operate a 25-W soldering iron for 8wz(o pn8(lcw ekc257 b.0 hours, if energy costs wc ewl k(zn857p2o(bc $0.08/kWh?

  How much energy does a 100-W light bulb u1, uxiker.n 0kse in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much heat enerk5euikexk-xa- e95 d(gyeke5a5 (e xu dk--ik9x is produced?

  A battery is rated at 12 V and 160 A-h. How much energy me7zppo, 4(v7tug l7 0uemqf6does the battery store?77efoeu,l (vq4 zm7pg pu0tm 6

  How much energy does a 25-W soldering iron2u*j0s m w hvvfhza+81xn 2.pn use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming the power c00zqm lg q88ihwed gg-iv*rtu6 o3*e* ompany charges 10 cents for each kilowatt-hour of electricity used, estimate the ann8vogtw* lgmr0q* 8eq 6uigiedz3*h - 0ual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0 hours per r 9mr0 z 2e1vqeuv3z(jday. If electrr10z9m2 vzquje r(ev 3icity costs 10 cents per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electric bill included the cost of running a central ai+ jrpj1/rq/w sr1dwzda /o,x0r-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 these items contribute to the cost of the m szr//1q d,wd/ 1 +0ajxojrrpwonthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element in an electric drier operates on 240 V and gen i8*jh*zxc s 3)yhase,erates 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 t* ia ,8y j3hssh*)xezche 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 through j z7xk9t0 f.dz$8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs 2u -n+jc9hke+p)u hb7+ammm j$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. Hxiyh +ms mm6 x4lffp)(-u ,a(iow much current doeh() uiami p, +mx(ls4mf6yf -xs it draw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power sou-r db g39a 9v8+usz62 z jk;piytcz)nwrce. What rms current flows t 98 3 z dgr-vw+62ys); 9npczztjbukaihrough this device?

  A 500-W device is connected to a 1b.p ambo85u. j20-V ac power source. What peak current flows through th bpaj5o..b8u mis device?

  A 500-W device is connected to a 120-V ac power source.5(bqlhko-b- x0 .cfmobb58 75yqm pcl What is the peak voltage across this(l-cxbfbok7lqmo5y0 qbc5 -b ph 85m. device?

  The diameter of a copper wiri3o3( ty; zutm2o zx 3jqs)r+xe is 0.081 inch. The maximum safe 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 oneq3zxyj sto2) o+t3xi zu 3r(m; cubic centimeter of copper is $8.5 \times 10^{22}$.)