A device that produces electricity by transformin/9wkl6ull98 rne 1ckz0h g4x q(6vb pds1jf i(g chemical energy into electrical energy is r w6((pj /1bi slxfezqg49vnu kl 06l8dk91hccalled a

  A car battery

  The total amount of charge that passes through l4p1 k )wjcsrz2:pgnkr2d5c (a wire's full cross section at an2z j: 5rn2kpc)d1 (wcp kr4lsgy point per unit of time is referred to as

  The direction of convention current is taken to be the directiof7 ,;4m gx.- xcfvagimn that

  A coulomb per second is the same asdtkiu)1.x89 oriw8vx82s ad z

  Car batteries are rated in "amp-homvv 1)m )gcwmw.*s 0 bcpfe: v4soq5;turs." This is a measure of their

  The resistance of a wire9 p .rk1;wbgodd jz)qm;+-m cx is defined as

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

  The resistance of a wir.zp8ggoip-gjz4 gu1m0+ n eo1e is

  The resistivity of a w;0zbpjcri8,ve mxec8+ ; tue(ire depends on

  Which conducting material has the lowest reskyjwm q5 3y4ln4 wb4d2istivity value?

  Consider two copper wires. One has twice the length of the ot)vpduf0+8:qa;k0 u 6esrv fs4t;dwnzher. How do the resisukt;40 end va;dq680f)w:sv +ufrszp tivities of these two wires compare?

  Consider two copper wires. One has twice the length of the othhemsj-lzoc;q3pg7mht36 v*i. *m+jz er. How do the resistances of thh*7 z; .eqph*vm mj 6lgij- ts3m3zoc+ese two wires compare?

  Consider two copper wires. One has twice the cross-sectional area of th9 t +pouu0b.nwm6r:w be other. How do the resistances of these two wires comtbuu rn+.obw m9p6 w0:pare?

  Consider two copper wires. One has twice the len8lz i*3 i)tn 61zyhuu)7 rpnyggth and twice the cross-sectional area of the other. How do the resistances of these two wires compa)h 13 7tl yigz 6uyn)npzru8*ire?

  The length of a wire is doubled and the radius is doubled. By what fa2 rjw+,kk6tfykrp8/dr:3qz3 *x cy mh48ig fhctor does thmf rk2tqrg*k jyfr4py+3d/c:8hxh,z w3i k86 e resistance change?

  How much more resistance does a 1.0 cm diameter rod have comparek v(cf22t8x3opo nld5d to a 2.0 cm diameter rod of the sam (n8o5dcxk2ot fv2 pl3e length and made of the same material?

  The resistivity of most common metalszs-j3ezsz8 6 gl4 euc;

  Negative temperature coefficients of resistivi)c5h9484zuj c5d cvtqezz *d7mlbj, vty

  What is 1 W equivalent tk/3kp.5fgq /ck-:rs rfamf u: o?

  A kilowatt-hour is equivalent toi-ogco 75hu; f+qqps 7)e,jnf

  If the resistance in a constant voltage circuit is doubled, thk7ut6au, ;zav e power dissipated by that cir,uuk6v;a atz7 cuit will

  If the voltage across a circuit of constant resisirzvj*ec6p p+, )y h hk/w1kf/tance is doubled, the power dissipated by that circuit willf6kj*,/rv+p zich e)pk/1y h w

  If the resistance in a circuit with constant dr)yx u9x /-v,hc.:0zs83z,cvswoobh rs, d vcurrent flowing is doubled, the power dissipated by that circuit wvwh,v. or8 doxyxsc/drs ):3zs,,c-0vuh b z9ill

  If the current flowing through a circuit of constant mrim4.,3hf kz resistance is doubled, the power dissipaz, m.hrm4kfi3 ted by that circuit will

  During a power demand, the voltage output iv1 mm1qdlh. vw0g-2qus reduced by 5.0%. By what percentage is the power on a resistor afh- ugq2vvq1mdlw0 1m.fected?

  A current that is sinusoidal with respect to time is r2dq rii2te7xts e*8b,eferred to as

  Consider two copper wires each carrying a current of ul.5s z1 xrk(imqgg c*eer7:7.vetd* 0bh )vc3.0 A. 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 wire ie0 *.vimcb5gqevh7 rx* r t(7duk)slz.1g:ecs

  Materials in which the resistivity becomes essentially zero at very low temper+b6t d45qkojgq,n vh/v: nqs3atures are referr,o4vhvq5 dn6qs/ 3+ jq:kn gbted to as

  What current is flowing if 0.67 C of charge pass a po ub voitz+,7..tbw; rvdh;-d rint in 0.30 s?

  A charge of 12 C passes through an electroplating apparzc+ s;5j4jcrkpbc -+fta:uu ; atus in 2.0 min. What is the averagebcaupj4 c-u5:;ct ks+zf ;r+j current?

  How much charge must pass by a point in 10 s for the curren1aszy y1a. .glu s2dz6pxt- +kt 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 ifrk0wt.h b;f z3 $4.0 \times 10^{16} \; electrons$ 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, whichm)zky- u kr vv/:pxnw) -b*t+r draws 13.5 A of current, has been left on for 10 min. What is the net number of electrons that have passed through the-mbynrw/*vv )puk kzxr t +:-) coffee maker?

  In an electroplating pr kd-sxh:v;fa ev1us0 9ocess, 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 01usv;x :hsk -a9 fedvsingly charged, and the atomic weight of silver is 108.)

  What potential difference is require9p2jd 6x) sjped to cause 4.00 A to flow through a resistance ofp9ex) 6 jj2pds 330 W?

  What is the voltage across a 5.0-W resistor if the current th,9eh 1 joea ug7p9d,eprough it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What curreqo28 dqq0xv)l2 iemx -nt will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its resistance6 z47gl)qucb r br46 )qzcgl7u?

  A 12-V battery is connected to a 100-W resistor. How m*h x4 :pzmq-iiq c5un)any electrons flow through the wire i pi)xhq5c mz-q4n ui*:n
1.0 min?

  What is the resistanceq)+7vmz i,gl(g:wdoc of 1.0 m copper wire of diameter 0.40 inch? (The resistivity of cq:dc(ogmg+ vli, 7wz )opper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameter a-4lptohre xm a/u7w+, hj/.w3rzj:na nd 45 m long, if the res4h,w. raxo jhp+nazm:j-/u3 t7re lw/ istivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of coppeaht8) e5t 6khdr 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 (resis 10(kdo 4w :mkd3fguyktivity $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 ohms. What is its rel: r0 c,uvgxycp319vuky 11lcsistivity?

  Calculate the current through a 10.0-m loh 6*fl1mtzuvw 0w6 c7 d/y9gtrm.ob .fng 22 gauge (the radius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. (The rtuhzfl /1rc f.9 b7gowt*m.m6 v60dyw esistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm lon7vt3 hc*.)r8u benqhzg and of rectangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its l z73nbr*) heut v.cq8hength 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 ad1.kbqo tp9 (b 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 coxjbg z /h72z+wpper wire (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 resis5guuwq f2u:uyipe4+; d+ ci +xtance 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 platinou + ej2mkyoj;wb83gax .,l b5um 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 usedlp60;i4ix i ga to determine the melting point of indium. The resistance of the plati4pi ;xlg i0i6anum 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 at,2sxaq )hnv0 n $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What curr4 kxbmnf)(o *oent will it draw?

  A 150-W light bulb running on 110 ktrcp.mhvh0 4.x/fc5 al e--cV draws how much current?

  What is the nominal resistance of a 100-W light bulb designed to be used in a 163o u *ic ,ydg4/pv yu/xhgb9l20-V circuit?/iu,lxo6 9yg3yv pdh4cgb /*u

  A toaster is rated 800 W at 120 V. What il8k; iksw)w,ck7 -sx xs the resistance of its heating element -,sklwc;)s kx8ik wx7?

  A 200-W resistor is rated b 5zd3fum 9j/pn/g 0 oznvb:d2at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated at bwxjb)nrn bl-nk0 659 xm hg6:ddi/0x$1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what current doe-q.q u djculmi;q4k 9)s it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, wp ggeya33h h/6hat is its resistance?

  A 25-W soldering iron runs on 110 V. What isn b 911bait0kzn w9mdn-0d7pq its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours, if + 363p;gz w,qrxqgexc energy cos+;e gx6g3c3 pq,wr qzxts $0.08/kWh?

  How much energy does a 10 9 vu+egy.pmu* 68ub6ttjs9 gr0-W light bulb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V lindwno ur h-88 3xuyl-e*e for 2.0 hours. How much heat energy isr uw-u8ox-ndyl * eh38 produced?

  A battery is rated at 12 V and 160 A-h. How much energy does the bx q3mc5h5e5wpattery store?e5hpq5 53cxwm

  How much energy does a 25-W solderinj6x tkuc09 n/)p /x eivzf5s359lbncbg iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours puxj +*isa )wj2er day. Assuming the power company c)+ ais* u2jjxwharges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer ,m-8dhj. /9fzn3cjb6ghqeocplus monitor) is turned on 8.0 hours per day. If electricity costs ohqb.8ze 69d, 3mnjgcc/fhj-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 cbr71mq(i,wj m ,;knxmq+1i wsentral air-conditioning unit for 2.0 hr/day w( 1m ij7+bi;,q mmkw ,xqsr1nat 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 monthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element in an electric drier operates on 240 V and generates heat.ctv xkgir 0 refn(-c3/w; 8vr 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 resistivit/k;(3iv0r.e ct rv-8f wgxncr y 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 c;:./ syrmdnk 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 xq,dnf+0 *5ssn wkzu5 $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. How m 2ee9 qprettuf-g8d ,*uch current does it draq9e,tudrpe28 t gf*- ew from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is cocmj b)5jjk: y+nnected to a 120-V ac power source. What rms current flows th+ )bjjj5:kycmrough this device?

  A 500-W device is connected to a 120-V ac power source. What peak currenmzi cd .(ce)+et flows through +ecced(i) m .zthis device?

  A 500-W device is connected to a 120-V ac power u0pth6w8;w j gsource. What is the peak voltage across this d;uj8w60g twph evice?

  The diameter of a copper wire is 0.081 inch. The maximum safe current itq ny+sm5 zn) da3wyd,x833cxr 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 numbyw,5dan3 xq sr mcz+8x33)y dner of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)