A device that produces elet6 s bbun8n.g8 n1s;jqctricity by transforming chemical energy into electrical ebb.8nj8s stng ;u61q nnergy is called a

  A car battery

  The total amount of charge that passes thr b ;f:f tcn.y,,xjq/akough a wire's full cross section at any point per unit of time is referred t:kj fxnay, qcf,tb./ ;o as

  The direction of convention current is taken to be the di5iz7.jx rt3zj rection that

  A coulomb per second is the suq,3exbg*y mwdx/3cx)*d1jmuk :a . oame as

  Car batteries are rated d h cn;jiu04l0in "amp-hours." This is a measure of their

  The resistance of a wirxbi)/ 7 5zvpwye is defined as

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

  The resistance of a wire i0: zsem v f4a,74xg 4qvrqzez1s

  The resistivity of a wire depends mp 6 p(h1rsgz n2th.2son

  Which conducting material has the lo.bu:l fo2b//7qgse ewsp-v .iwest resistivity value?

  Consider two copper wires. Onoz*artv 3.b/v .ydvgu*(2hyxe has twice the length of the other. How do the resistivities of these two wires compare? v rb (g.yy.d*zhat2vvx/ *3ou

  Consider two copper wires. One has twice the length of the o.m *eas8pl t(fther. How do the resep (ms*la 8.ftistances of these two wires compare?

  Consider two copper f4 sfwu7pj.7q wires. One has twice the cross-sectional area of the other. sup j7 .7wq4ff How do the resistances of these two wires compare?

  Consider two copper wires. On +djj.)u.nl0da dw fe q, ).pth1zb aw84.cjqce has twice the length and twice the cross-sectional area wb)t),0 4jj .d.8wq1qfel pda+aju.h .z cd ncof the other. How do the resistances of these two wires compare?

  The length of a wire is doubled and the radin/ j8,gbrz8uy h*rr 0fus is doubled. By what factor does the 0/jf8 zbr ,ngy r8*ruhresistance change?

  How much more resistance does a 1.0 cm diameter rod have compared to a 2.0 cm+ f 3jgzp ssry,om,k2) diameter rod of the same length and made of the same mks,o+fmj 3g zy)p,rs2aterial?

  The resistivity of most co86m;vhw nwv g.mmon metals

  Negative temperature coefficients qpd9oy 6wpk- y:o)an-of resistivity

  What is 1 W equivalent to?-2qciiqb7d nncrh ++qqj0.)k

  A kilowatt-hour is equivalent to3aurlqfp8 g -1

  If the resistance in a q8fg msc./xn-6d w kc5constant voltage circuit is doubled, the power dissipated by thqk 6/s8mc-dcgwnx. f 5at circuit will

  If the voltage acros:tgxj,eop(g)agmsdc , i 4c:1 s a circuit of constant resistance is doubled, the power dissgt(1 ,cjaosc,4dx::i megpg)ipated by that circuit will

  If the resistance in a circuit with constant current flowing is doubled,x99-ektjc2 qo tz5ry- the power dissipated by that circuit willyt2qt rjk eoc99-5-z x

  If the current flowing b4u 8ymk.o nnlnu;g) ha)z,1q through a circuit of constant resistance is doubled, the power dissipated by tha.yua8;) hnbko4n)nq 1mgz, lut circuit will

  During a power demand, the voltage output is reduced by 5.0%. By whjjm.(raqiggxg3xv2m l/ (c;0jlu2u8at percentage is the power on a resistoj(2(i qggja 2v m3m/0ux.grljlcx;8ur affected?

  A current that is sinusoidal with respec/rn:1bzwoxa i ad*1 pm( 89csjt to time is referred to as

  Consider two copper wires each carrying a current of 3.0 A. One wire has twic5v ue;xycsn -9e the diameter of the other. The ratio of the drift velocity in the smaller diameter wire to that x ucey5-9n;vs in the larger diameter wire is

  Materials in which the resistivity becomes essentially zero at very low temperxgwl/wv ;,j9watures are rl9;/ wvg x,wwjeferred to as

  What current is flowing if 0.67 C ox2 pr u rok,7hy3upo(0f charge pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus ihij2 4adihetg j; 2(i1n 2.0 min. What is the average curren2itg( je iha;hdj 41i2t?

  How much charge must pass by a point in 10 s for the current to be 0.f* o.wc.gynqm. o:4 np50 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 ic.5c 8s2b* gw5(* mohuqvoj xcf $4.0 \times 10^{16} \; electrons$ 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 /v hp3(h) h w34-c1gg7onplimzn bxk -A of current, has been left on for 10 min. What is the netbw 4moic) n(--zghp/h73xh gpvnkl31 number of electrons that have passed through the coffee maker?

  In an electroplating process, it is desired to deposb a:6)*a jjrrx(um10h3yend x.0x) g*p e muefit 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 p0ma u13 xra*fheyrm:e *xn.u6j0(d)x)e jbg 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 the1knr2he1qbnlxqh;(34p+ds ( ,ef a crough a resistance ofaf,dnrq1(be+3hh kel24p 1se;xn q c ( 330 W?

  What is the voltage across(2 sc-ftcp ;er.tyoh3 a 5.0-W resistor if the current through it is 5.0 A?

  A 4000-W resistor is connecter /2uq0v wij u3xj,,+bt5t l dlpdn2m.d across 220 V. What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What urz+lz8;,2 rjr+ rjjr n87mddis its resistancej r z8m8u++dr 7,rn2ljzrrjd;?

  A 12-V battery is connected to a 100-W resistor. How many electrons flow througsizkh.lila 9 3u6o4)zuf (d,sh the wi.s3z6hlu 4ozl)f9 k dsu ia(,ire in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameterm)f5hpvwzf, v 5fy0-2t ye6 kt 0.40 inch? (The resistivi,kfe0z)wm yh5vt p2fyf5- 6vtty of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance osj6/gj4zba gx6wf/ 8 wz2: tqlf a circular rod 1.0 cm in diameter and 45 m long, if the resistivitywsz2 ggtl:j4 fxja q /6/w6bz8 is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wiresnv(-wx1bunk.q.d0 i5-a m vd (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 w w5rg h8u-ass5cp d;a8ire (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, measeryy 6+ v.var7ou3+t hures 0.040 ohms. What is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge (the radro7wkfxd0 k:xn9xi kp:4u) u;i,r 6mvius is 0.321 mm) nichrn rkmviuxodkx:k x9: 4u;f0,6r7p w)iome wire if it is connected 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 and of re4 nj4it4m;bipki6s2ttk r :tmv3v1j4 ctangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carries 4000 A? (The resistivity of coppe441m4smpni4k j tb;:rtt v ji2kti6v3r is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichrome wire has a radius of 0.50 mm and;. r myxeupd,u,h-5me 0fv2sm 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 (resist7 sdg6v/asg/.wsu; h vivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resispk9lzbn: u1;wg: k +txtance 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 ofjn6. 3f*1mlq.o1d 0i ji9d dp zf+jbfk 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. The resistan4(kv ez4f1w hnce of the platinum w(nk fe44h1z wvire 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 th 9olm; x e;) xv2i zd)k8jtx/yel84buprough an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What j/emvc0qx ;/d s*)gef current will it draw?

  A 150-W light bulb running o,7(c (3vrj:gryp 3bxpo8wazq n 110 V draws how much current?

  What is the nominal r gw v0.dka)tu:esistance of a 100-W light bulb designed to be used in a 120-V circuiuk:d wv.g)t0 at?

  A toaster is rated 800 W at 120 V. What is the resistance of its heating elels5blw8h9l8v-mark9m(y a /d ment-lmaywhrl 88m/b da(vl9s95k ?

  A 200-W resistor is rated at c p3:xdp p+e-q$1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ;m2n tz5se: 7xjfgal9 xa *+z/wiut+prated 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 ito , mry3gw((xo+ /;mfwtv nbk5 draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is e*: a- rkx4hfgits resistance?

  A 25-W soldering iron runs on 110 V. What is its n e1a) f4x,erwresistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours, if energ tdrv*xh3:u 504bzfayy c uyzdr0hvt3bx af*:4 5osts $0.08/kWh?

  How much energy does a 100-W light bulb use i.:;q t xrv: a-si:a y+icxhn(3sqc*m yn 8.0 hours?

  A 1500-W heater is connected ton9s ese(oxjaxx;e -5l /yk.o/ ihsl;5 a 120-V line for 2.0 hours. How much heat energy is pr-xj9l/yxehxols/5kseo; (5ia ;. sneoduced?

  A battery is rated at 12 V and 160 A-h. How mucao.; 8jsng p5bh energy does the battery store?8 j onbsag;5p.

  How much energy does a 25-W s.k,tr3h9b0kt 2r k jeboldering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours p;vf*gt vbl cz*a5** ycer day. Assuming the power company charg ;fv *tlacgv5y*cb**zes 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0 hours per day. If eleo,l cx*6(5ii m lggcl+ctricity costs 10 cents per kWh, how muchli5,co* c6mg+lil(x g does it cost to run the computer annually?

  The monthly (30 days) electric bill included the cost of runnivbe mz 8y+hmt8 we, 9ko(hmy:u 9s3gwjv+ed30ng a central air-conditioning unit for 2.0 hr/day at 5000 W, and a0e mgyh dz, 9v+j3w3+suyowemt88bhk9ev( m: 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 pz** e.eoi-n a6f- tiz+vhr+c240 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 faio p++ ve**.z-irt-nczeh6 temperature.) What effect will the repair have on the power dissipated in the heating element?

  14 A of current flows t-;b b9w5tjke2niz6r, 4/n gojnihv ;s hrough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs ys)6er 0ukb2 3fy-h ep$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 wo/ 7 dv;av0l czgbk;.j 9)cnp db8p0o;qslx.xwrk at the rate of 2.0 hp has 60% efficiency. How much current does it draw from a 120- bcn)/c;9 zalxp gqobdkx0.v;8sv.;d lp 0w7jV line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rsjczgk,46t0o.- f cnrms current flows througn.0to 4rc6f gzc- ,jksh this device?

  A 500-W device is connected to a 120-V ac power source. What peak curr: rbi,mid5i dp0o4c7aent flows4drdb oa5m ip,i:0ic7 through this device?

  A 500-W device is connected to a 120-V ac power so /att m8tv*zi3urce. What is the peak voltage at/8m *zt 3avticross this device?

  The diameter of a coppe7 dza(3m*)vyav6foa: hqrqe 2r wire is 0.081 inch. The maximum safe current it can carry (in order to prevent fire danger in building construction) is 20 A.q v)aeor (2*ad z6qhv mya37f: At this current, what is the drift velocity of the electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)