A device that produces electricity by transforming crlm*f6 og26e 1yzjs9w e,tbc9 hemical energy into electrical energy is called a1e9 9ose*z6 y bj ctwfl6r2m,g

  A car battery

  The total amount of charge that passe4ng:r:2d .c mgsa1f-zpij +x fs through a wire's full cross section at any point per unit of time is refermf. 1jpgd:: csnzg42 f+air -xred to as

  The direction of convention current is taken tet 9rze ;e8e4wo be the direction that

  A coulomb per second is the sah+) bis:faa(m0jisdrdk* x 9(j 6c3gome as

  Car batteries are rated in "amp-hours." T l dl(to-cqfc6,w,- yuhis is a measure of their

  The resistance of a wiszg3v8e 4krd nilrdh6t10,; k4 o 7fanre is defined as

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

  The resistance of a wirehr,j x1jbe 7/z is

  The resistivity of a wire dep8 -6zt.m abqkmends on

  Which conducting material has the lowd8f5a :nmzce2szhtf;-q m8s v9x8( pu est resistivity value?

  Consider two copper wires. One ha:o64nz aww0o ws twice the length of the other. How do the resistivities of these two wires compozw:a o64ww0nare?

  Consider two copper wires. One gk:ivr,fow5hp,k nez9 v/ 87ihas twice the length of the other. How do the resistances of these two wires compare?r9,wv8ei hk ngov5/pf7:z k,i

  Consider two copper wires. One has twice the crogd po ; 0j41bi9u(ejcsss-sectional area of the other. How do the resistances 9e4(joc dgp1 j0iu;sbof these two wires compare?

  Consider two copper wires. -n jf*muff84ld fjf,0 One has twice the length and twice the cross-sectional area of the other. How do the8jf,flfj*fndu4 0- mf resistances of these two wires compare?

  The length of a wire is doubled and th;:47uq l lcjqhe radius is doubled. By what factor does the r7h4qlu :jcq l;esistance change?

  How much more resistance does a 1.0 cm diameter rod have commgcc1y 3(3 yb x9qxfi.pared to a 2.0 cm diameter rod of the same length and made of thef 9q ybc3y.igx c1x(m3 same material?

  The resistivity of most common mey/cpi7 p8f j e1lsb*+qtals

  Negative temperature coefficients of rext8- lxlt p y8aojh996sistivity

  What is 1 W equivale3b9wu wuo t5)qnt to?

  A kilowatt-hour is equivalmi w*u9 ifsn 8ps1e9p bgo,d)+ent to

  If the resistance in a constant volt/ ej i;i c 3x9y827egznr-r zv6hdp:ivage circuit is doubled, the power dissipated b78/ve6 9gvei-;:r y rzh c3pixdn2i zjy that circuit will

  If the voltage across a circuit of constan ;08mdrb;*utaf7u tsqt resistance is doubled, the power dissipated by t; r 0a;u7tds *8fmuqtbhat circuit will

  If the resistance in a circuit wjjftaqi4hn 3wrttad6bl5-qv ,xi*l(q 3 h1:+ith constant current flowing is doubled, the power dissipated bybathjqlq -i4r 1xjvifnq 3*(a 36 hdt5:t+,wl that circuit will

  If the current flowing through a circuit of constant uy 1 x7:b7wdioxv65sr;fghr 0 resistance is doubled, the por6;x775 :borushw0 vi 1gf yxdwer dissipated by that circuit will

  During a power demand, the voltage o/ k- lll(n .3jtq2ez4t tt tsd9koex6*utput is reduced by 5.0%. By what percentage is the power q*9kn 32lzt(.sk lx jet -/ltdtt4o6e on a resistor affected?

  A current that is sinusoidal with respect to time isv h fpc49t22f qc x*6dzrn))op referred to as

  Consider two copper wires each carrying a current of 3.0 Ai )fz2zg n4uz2i-on:h. One wire has twice the diameter of the other. The ratio of the drift velo2uiz -nn2g: 4zf oiz)hcity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becom2yz0obycm w jeu1 i0.6es essentially zero at very low temperatures are referre 21 u ebwjo.c00z6myyid to as

  What current is flowing if 0.67 C of charge pass a pl/ dmxg+hwn9 3k08opeoint in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus in 2.0 min. Wha ru6l 2vj/mk:vt is the average j2/ ulkmv:rv6current?

  How much charge must pass bgq)l le2q//y xy a point 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 flowing ivu2n aiw2x*zy-q 8 j+uf $4.0 \times 10^{16} \; electrons$ 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, flmpn:*7n 1 )gp9otjlhas been left on for 10 min. What is the net number of electrons*n)lm9t plnf7gj:1 op that have passed through the coffee maker?

  In an electroplating process, it is desired to deposhwyf4g itkq/-ehv.g 0q(n .0vr+n5g bit 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 cha gghb(q 0n-5y twv/r.nq. ekvf40ig+hrged, and the atomic weight of silver is 108.)

  What potential differen 7sp- fjqqhgp-06*xg)ofm qj3ce is required to cause 4.00 A to flow through a resistance7hfq3 xpgq-q6sf)m0j -o jg *p of 330 W?

  What is the voltage across a 5.0-W resistor if the cos0n0 i zl 3a/3gunbeud2l 641hxs;u jurrent through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What current will r igjt c17 :.ykdfop6o-a n+r1flow?

  A light bulb operating at 110 V draws 1.40 A of current. Wn zgyebe 6 m()c:tpbioa1 * :/nhdf(b,jy,j;fhat is its resistance?dji,, e bzec:gbj6;o typ/f yhnbnf :*1)(a(m

  A 12-V battery is connectedm,pth r *9vj3euxe);t to a 100-W resistor. How many electrons flow through the wjux )3ve9t pme,* ;hrtire in
1.0 min?

  What is the resistance of 1.0 m c*r44h0/qn iz rtlum bi(me1;topper wire of diameter 0.40 inch? (The resistivi rtitnbz;* urlih/4m(q 4me01ty of copper 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 thkf9j- *fumsd( n;rk 4de4*m-krfj d;u f (k9dsn resistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (res 0n+( obbs*mfxistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wl2 gdom.ek+o:t2 6dm l;qhn+ mire (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 ohms4wncf8kl mvy5p , zj68. What is its resistivity?

  Calculate the current tq/ m/3etcokt uzu9kaa)la( (rid: :/shrough 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. (The qzdut39(): /aro/aalmiukk /(t ec:sresistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cmmvn.1zf(f4a* ;wibfqk j+ *xtgywo95 long and of rectangular cross-section, 1.0 cm x 2.0 cm. What is the volt.woa+q fz*;f vmg k b1ywi 5njxt4(f*9age 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 hyf+v u v/uy 6go 8i8gbd*3;dzwas 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 ws ep+szmlrb 5q: 6eb:)ire (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 resisoss)jz e 2o0u:tance 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 resistivityud assuldf4 .rhw8* lg24,.lz 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. The resistanca6xz j 53ffg* v5ejj*6cmv 8joe o 3m8zvfjfjexjo*6 g5aj* v56cf the 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 through eo:,mjm9mub 2 .3yb,9kxq ziean $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current wjjt./j9m i8v wuy4q r0ill it draw?

  A 150-W light bulb running on 110 V draws how m3fucpc. 3vj 10hjq s/9c k;ivxuch current?

  What is the nominal resistance of a 100-W light bu,deueamhgy 69:v*w lufz6l +;lb designed to be used in a 1206*6, dv;luluh+eg wf:zea9ym -V circuit?

  A toaster is rated 800 W at 120 V. What is tkyw(w .,y58(hi,ui zkt: refxhe resistance of its heating elemenwy(kyikfi(,5rwtuze hx,.8 : t?

  A 200-W resistor is ratml+ lvuejrah351gd 5;e 0yq9 ied at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ,2) 62mrh/znzs xolr0lp0lz r rated at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what cug+tygdd l160sf)eo;w mm: 5pprrent does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is itsjb va e1u3;ze9 resistance?

  A 25-W soldering iron runs on 110 ( ffe 2pj3xz/bV. What is its resistance?

  How much does it cost to operate a 25-W sol) eo, sh;+dofs0bfpk*dering iron for 8.0 hours, if energy cos*b0ksdf;o so,hp)f +ets $0.08/kWh?

  How much energy does a 100-W light bulb use in 8.-b b)um.jl5nnaffq nf8w r+o wh90j7)0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How mw7(s6 *tzxo esuch heat energy i7 zstes6 wo(x*s produced?

  A battery is rated at 12 V and 19wd pdf6 e1kqi4*zse360 A-h. How much energy does the battery store?e 9spfiz46d*k q1ew d3

  How much energy does a 25-W solderingg sx.i4 jtwn/a1rfs/6z7 ht5oie-o5l iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours pe/:bpq9r 4 jizsr day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate the bu9:j b/r4zip qslb.

  A 400-W computer (computer plus monitor) is turned on 8.0 hours per day. hi ulgx)t64x,If electricity costs 10 cents per kWh, how much does it cost to run the computer i,xlx gtu46h) annually?

  The monthly (30 days) electric bill included the cost ofb)/xvo-/z*x ,vh lmcz 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 5.0 hr/day. Howbzxx*v)-, /v c/mhzl o 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 a+x.qvnr1;ie gci5 b6k n 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 owner shortens the Nichrome wire by 10%. (Assume the temperature i 5nqec61g k.xr+iv;ibs 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 tysb/d ,l80jpl hrough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costst58)twk :vsycb6,ml a $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% efficienc biux2t+//tm uy. How much current does it xb+um2uit /t/ draw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rmk+cb)hns p:- ufb4/ u7ffuj8 t;.ln yos current flows throughh.n ul 4b yp8u t)j;k+f:/ b7-onfuscf this device?

  A 500-W device is connected to a 120-V ac power source. What peak current flnx o4x2 n g+ :mvr4uh:9fb4tdoows throughmgf:t 4o xhxno:9r b4vd2n+4 u this device?

  A 500-W device is connected to a 120-V ac power source. Wh 0f- +yk3nk38lfbk5 sbxvf.ilat is the peak voltage acrossvs0l 3ky nb-ffik5x38 b+lk.f this device?

  The diameter of a copper wire is 0.081 inc,xtt)x(yooucj*d (d (6 t p,rf- gfqi6h. 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 one cubic centimeter -(i6tcdt( ,, dpfy)j6f*(ruoq xxtog of copper is $8.5 \times 10^{22}$.)