A device that produces electricity by transformin h94+c)qp:iq3 pbplpmg chemical energy into electrical energy ippbp +cq49)l: 3ihpmqs called a

  A car battery

  The total amount of charge that passes throug/gh* fjn zgy-.(mfn l2h a wire's full cross section at any point per unit of time lnj(fh.g y /m2z* fgn-is referred to as

  The direction of convention current is taken to be theuft2ex, 37 ihrbew)/h direction that

  A coulomb per second is the sa0g*socq68) -dch kfmfme as

  Car batteries are rated 4ee9 /0mp1zcqht6 gkxin "amp-hours." This is a measure of their

  The resistance of a wire is 38jb5, pdnu ymi6n v*mdefined as

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

  The resistance of a wirkr;l9(wd 6as3)baa3 mpsd1 vde is

  The resistivity of a wmk0gl tw 61x-oire depends on

  Which conducting material has the lowest resistivit+ yd4p2)r, f -vbtohzgy value?

  Consider two copper wires. One has twic-n:ilh 3 emu5be the length of the other. How do the resistivities of these two il-eu:n m5h3bwires compare?

  Consider two copper wires. One has twice the length of the other. Ha 5 ou4z )*2y*nkurxal3xrk0 vow do the resistances of thes3x nv5kr u)*u4x*2oyar0zlk ae two wires compare?

  Consider two copper wires. One has twic62el66t +ysi.xj r ksee the cross-sectional area of the other. 6e6 skr2s 6tye.i +lxj How do the resistances of these two wires compare?

  Consider two copper wires. One has twice the length and twice the c g25sxfevte /dj+hswp0 b aj.:z+g 5t+ross-sectional area of the other. How do the resistances of thes 5tad g20/ej vgs+wbz.++s jfht:5pxee two wires compare?

  The length of a wire is doub u2cx bjqh:;3pled and the radius is doubled. By what factor does the ; 3u2:pqcbhxj resistance change?

  How much more resistance does a 1.0 cm diameter rod have compared to a 2.0 cmas0g)d4tp evf d)f :o 6rrr)+5m6bnsz diameter rod of t astdr) g45 rv+0z dmr6p)sb6enf):fo he same length and made of the same material?

  The resistivity of mo61-)t fa;cgy* cb6h( bizmwvaz- g w2cst common metals

  Negative temperature coeffib7 n y4h68 z:stqn2z3 psw.objcients of resistivity

  What is 1 W equivalent toehums (;6m(4te0t8nab g,sn o?

  A kilowatt-hour is equivalentj2/.z4 rec/er;y o scz to

  If the resistance in a constant voltage circuit is doublecvf5ecu/eek,qd 0 +h1d, the power dissipated by that kc,ecu+ /d01qf vee h5circuit will

  If the voltage across a circuitjkfs7 +,/sx ep *nht0sa5lb6(gp5zje of constant resistance is doubled, the power dissipated by ,(est*0b+pzlfj7ans xep s6jg h55/k that circuit will

  If the resistance in a circuit with constant current flowing is dou5m e*oue ngq)+f(:e ix2bt be)bled, the power dissipate) e *nmiqe ebxb5 )fogt:+(u2ed by that circuit will

  If the current flowing through a circuit of constant resis, s7al 4bbk/istance is doubled, the power dissipated by that circuit wiibbas7ks,l4 /ll

  During a power demand, the voltage output is reduced by 5.0%. By what percee77pmt 9o , q.5qoekknntage is the power on a resistor atm qqnp5e ,79k7o oek.ffected?

  A current that is sinusoidal with respect to time is referred to asbmqq emv 7afe fasmx3v2 1m,1+kgq05-

  Consider two copper wires eacs q-vz(bu -2yeh carrying a current of 3.0 A. One wire has twice the diameter of the other. The ratio of the drift velocity in the smaller diameter wire tu-e2 q-v (bszyo that in the larger diameter wire is

  Materials in which the resistivity becomes essentially zero at very low tempegc bvxcpzgi +:+9jru2)tr *x 6ratures are referr)6:ix bc2*c gux9gvrz+jt+p r ed to as

  What current is flowing if 0.67 C of charge pass a pointw-cv11rv -wpc in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus in 2.0 min. Whaeyn i;6ltg*q 8gj r.7fid0a5 ft is the average q*6f;70gailrj 8.n ydg ftei 5current?

  How much charge must pass by a point in 10 s foisuvi.z cq1 r55so*,vj9 om3er 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 flowznyu e1bj5 :. dj:u8vzing 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 lef9u+pq9 f4 br.letrpf;t on for 10 min. What is the net nf4rtr9+ul b;9.qe p pfumber of electrons that have passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg ot2xua +/kb5a i8 nbm:qf silver on a metal part by using a a x52u8a m+iqn:bbt/kcurrent 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 silver is 108.)

  What potential difference is required to cause 4.00 A to flow througz5dj8r def1vuk)n;bg 4 8hrz d +-pn9gh a resistance o 98 8ndd45z h +z-jegbruvgf1r;kdpn)f 330 W?

  What is the voltage across a 5.0-g o-b)dvtm*z*-n lff-W resistor if the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What current wik o9 jz0 u9sjiq7.j,btll flow?

  A light bulb operating at 110 V draws 1.40 A ofdkv)z kycn/* 6 current. What is its resistance?d)kk *6/y vczn

  A 12-V battery is connected to a 100-W reid9cc i 0s*5ddsistor. How many electrons flow through the wire inid9 d0*ci dcs5
1.0 min?

  What is the resistance of 1.0 m caw5p0g6d1f w/s; q,57i kbs rdbakr, iopper wire of diameter 0.40 inch? (The resistivity of copw sr0 q/a,k;df5kb,gw i71pas5bi 6rdper 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, if th f sjxlzzg7,tax70 9dmp8i-5je resistivity isp59,8g-0sjfzlx 7zmxt a7ij d $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resistivit/u3u3+vobfhv vhj1hv - k)ioj9 /dza+ y $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wz9bceu ewh3twe( 2o9 +ire (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 ax4v) paj/ ajx5s7e2johms. What is its resistivity?

  Calculate the current through a 10.0-m lonm+gt m6jo/9uz0z dj8ig 22 gauge (the radius is 0.321 mm) nichrome wire if it is conn86dj+oi0zmtj/gzu 9 mected to a 12.0-V battery. (The resistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long anweae d9 lt*z7u8 ofu;++ 39zs;kglkrbd of rectangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carries 4000 A?+ zwul;k+k9 g7so ue3lrtzf ;eab *9d8 (The resistivity of copper is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichrome 2s ovt l.3dabw/+)s9fnjwg: lz2 +wmhwire has a radius 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 wire (resisw5x *(qn4m( l) wnhyfmtivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistance of ,-tlz1 p) q vnsemy1-l$18 \Omega$ 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 a yeb:9,gww o: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 determine the melting point of indium. Th+cp0 +gsspdh q/y0jk9 e resistance of the jckqd00/+sh 9ygp p +splatinum 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 akx2dr oc;8 ln tpx-7q4n $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is r)ub t2,kk gam2ated at 1200 W. What current will it draw?

  A 150-W light bulb rfx1/vw5 zu x7tunning on 110 V draws how much current?

  What is the nominal resistance of a 100-W light bulb deswy3c s9*l l:)+ lih6ux tqb mz8:o-mniigned to be used in a 120-V circuit?x9locbz l m* ) hiswm+u:6 qtln:3-iy8

  A toaster is rated 800 W at 1bj h9)cfw; lzx.0xwye5 m+rc;20 V. What is the resistance of its heating elemenbmcl5;hxw.0 )x jef+zyw r;9ct?

  A 200-W resistor is rat 7(znnorekx7 v4. *wlvj*ffauz01 ds+ ed at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is 3:e a9ykjxjkoo 2y0l;u 7n-jerated at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If ib 6uew*/j wev-(w 2e0 yde3tgct is used at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is its resisvn6q/04he a /m pzfof;tance?

  A 25-W soldering iron runs on 110 V. What is its resistance?bfah9an (3sf/up 5l8q

  How much does it cost to operate a 25-k* v9bme t6a*sdo (iw:z50vi:- raonqW soldering iron for 8.0 hours, if energy costqkbseo0:v *v5 iw d6n(mori-t:aa *9 zs $0.08/kWh?

  How much energy does a 100-W light bulb use in 8.0 hoursg 9(kfjul )h;qi f2ee4?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much heat ener(ftl. :5y od1tk2fc jod0w6uapo g0 )cgy kao .gwdf0)dtf21 0(o:5yt l6pu j cocis produced?

  A battery is rated at 12 V and 160 A-h. How much enf8cr8ar; p w(lergy does the battery store?par ;lf 8r8wc(

  How much energy does a 25-W soldering iron use in 8.0 hjbn,g :dn n34lours?

  A 100-W driveway light bulb p0+ xyycsu9lwo)i 3dyizj.3 (is on 10 hours per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual costd(jsy+pw zc 3y.9xioiy) lu 30 to operate the bulb.

  A 400-W computer (computer plus mondf5y7fl7 7- dmzbp cdj56xh:litor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to run the compu57b-x6 jl7 dhl5mfpf7y d:cz dter annually?

  The monthly (30 days) electric y( mhbtg-v rujf0 1/g;8or)ugbill 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 5.0t(u )0rbmg;/u hyj1f8 ggr o-v 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 *gy+iz z4qq2j an electric 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 oj zq2izq4 g+y*wner 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 element?

  14 A of current flows;xoffo:dh2g39d0 cbyie 2cf . through $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs fndw 7 jw:b()v7l)gs4dzo+ qb$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 *4qy,u1b/ kbpax5hlz yyno/,has 60% efficiency. How much currentp/q yu/x ,by4 ,ybzkohl na1*5 does it draw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power sourcey y pqwr;b/v4+. What rms current flows through this devicp v;+/y qwby4re?

  A 500-W device is connected to a 120-V ac power sd.8uj4dt nlry(ttbk t++gj98ource. What peak current flows through this luktdjr g +8tyj.t+8tdb( 94ndevice?

  A 500-W device is connected to a 120-V ac power source. What is thxihb2qc0(l u9e peak voltage across this devi90h2lqcx (ibuce?

  The diameter of a copper wire is 0.081 inch. Thefk: 57py k6 mu4mvo*ft maximum safe current it can carry (in order to prevent fire danger in building const f75vpfm ktm6o4:ky* uruction) 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 is $8.5 \times 10^{22}$.)