A device that produces eleg3rd r a(fs++hctricity by transforming chemical energy into electrical energyh+r f+ ag3d(sr is called a

  A car battery

  The total amount of charge t*6:vaz c 5 1) b*/gqltjcgaa/nlio)xphat passes through a wire's full cross section at any point per unit anj*gv5il):zc /qc /1tax*bg 6lopa )of time is referred to as

  The direction of convention current0*yiwgjl1 ,)ktl.o dmj h0u ;h is taken to be the direction that

  A coulomb per second*rmlm fs)b: m; is the same as

  Car batteries are rated in "amp-hours." This is a meagn7 vx/-w8 upv*1edmqsure of their

  The resistance of a wire is hjvdjgo01 +em24hm( wdefined as

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

  The resistance of a wi)ctx.tzg9 k-/et wn3yfn6 8:x eqk6skre is

  The resistivity of a wire de rmu 0og3:h/nwpends on

  Which conducting material has the l5;f/d m, p 9;md7v(hhlt ugbjrowest resistivity value?

  Consider two copper wires. One has twice the jty4-1k bswijj0 qt17length of the other. How do the resistivities of these two wires compa tbj0-7j ks1wq yi1j4tre?

  Consider two copper wires. One has twice the length of the other )zcuwj8owr,qavl*k8 e.wf 8 g*sz +5d. How do the resistances of these two wz *evkc j wuq8)zo,ag8*sf l5d.8rw+wires compare?

  Consider two copper wires. One has twice the cros cw(h/;-avc97, zar0x uvrgnt s-sectional area of the other. How do the resistances of these two wirev( uznh9wa tv-r/7,xc0r;ca gs compare?

  Consider two copper wires. One has twice the length and twice kr: fkpptp d7-4lq;zju9t*i, the cross-sectional area of the other. How do the resistances of thesukk 7z *r:, ;t-ptlqdjipp f94e two wires compare?

  The length of a wire is doubled and the radius is doubled. oe(87 ilxsme* By what factor does the resist( mel 7sixe8o*ance change?

  How much more resistancejvc63sw *,y3h mjras4 does a 1.0 cm diameter rod have compared to a 2.0 cm diameter rod of the same length and mad mc,4jyjvhsa* rs w633e of the same material?

  The resistivity of most comm y4tqzg8 ;9qbyon metals

  Negative temperature coefficients of r gl 7wf kgh1ja3(0ghd;esistivity

  What is 1 W equivalent te*x* y1kbe p4( ef0lbzo?

  A kilowatt-hour is equit+8czbwl:ov f5vk2p8 valent to

  If the resistance in a constant vod.vynk(v63 x o:-n(cptw n/xvltage circuit is doubled, the power dissipated by that circuc6( v-k3x/wnty:vn nvx(odp. it will

  If the voltage across a circuit of constant resistance is dd qn3 v3. ab572t0nncjw;z bufoubled, the power dissipated by that circuit wil3 nnc.b5ad23jf qu07t v;zbwnl

  If the resistance in a circuit with constant current flowing is doubled, tho- l+t sc8)a rftnn:a t):gnj:e power dissipated by t-atrgtjtan:)l:+c)n :nf 8sohat circuit will

  If the current flowing through a circuit of constant rek/4 ,lcu 2;geo2kn2fb zpdj i nes-/-ksistance is doubled, the power dissipated by that circuit wilk 22gn -e2nu;kef4zkpsij ol ,-c //dbl

  During a power demand, the voltage output is reduced by 5.0%. By whqd* sbyv946o mat percentage is the poweymod*sb6q 9 4vr on a resistor affected?

  A current that is sinusoidal with respect to time is ref8(t7-krtfp0z6b guy. fsv, gjerred to as

  Consider two copper wires each carrying a current of 3.0fvo+ :qe8gi3(iy:zr f A. One wire has twice the diameter of the oy:r+f fg(v8:oz 3ii eqther. The ratio of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomes essentially zero at very low uoplg2p9,4 sz7 pht: otemperatures ,pl o4pg2p 9tosu:h7z are referred to as

  What current is flowing if 0.67 C of charge pass a point iip lfkzj.z;;k )z3fe.abp (v4n 0.30 s?

  A charge of 12 C passes through an electroplating appdb,c+vg zq9 5+e ic 6jz3dhpi3aratus in 2.0 min. What is the average curr ezg5 v bcqz d,3djp+iih9+36cent?

  How much charge must pass by a point in 10 s for tpof3x;ek vxem9 f 4a+t8 ;y;pnhe 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 flowit6 5cfk),5uh6uxjsalng 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 ;;jaxhvii4d 1A of current, has been left on for 10 min. What is the net number of electih ;4j;iv 1xadrons that have passed through the coffee maker?

  In an electroplating procep c air):ju (68v*9 ep1cdxhyqss, 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 allxp)v ju*hr19epccy a6( di8:q owed 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 ytq+)g 2k)by nrequired to cause 4.00 A to flow through a resistance of 330+gyk) 2yqnt )b W?

  What is the voltage across a 5.0-W resis) mr5 dnzct9(crn95cptor if the current through it is 5.0 A?

  A 4000-W resistor is connected across 22 5seroxjo, /-f0 V. What current will flow?

  A light bulb operating at 110 V draws 1.4xb-yojj(.*k x,m d 8uw0 A of current. What is its resistance?xm-jy o,b.j*wdkx u(8

  A 12-V battery is connected to a 100-W resistor. How many ele8vj1u8qyq:wfl8j d n5ctrons flow through the wire i 858 qvnw1 8jlujfd:qyn
1.0 min?

  What is the resistance of 1.0 m copperm-jqox6gc w*4 v:a yjwu6yy90 wire of diameter 0.40 inch? (The resistivity qwo9 0w:jc ugy*a6yxv- y4m6jof copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a 9 +6ur8hcrhzrcircular rod 1.0 cm in diameter and 45 m long, if the resistivitycz9rr8u+6h r h is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper o. 3fviusuzv6p3v9m- 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 (resistiv)lzd m8yjydjmr t+qd6 5 vd,0)ity $1.68 \times 10^{-8} \; \Omega \cdot m$) 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. W :56cowi qsipigq.j4*hat is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge (the radius is 0.32kyd0n13*y*ozbzj, l/j 9 silg1q; bxa1 mm) nichrome wia **9/yz ;joy1 bngd,llqi3bkj1xs z0re 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 rectangular cros7y*xmis 7k/cds-section, 1.0 cm x 2.0 cm. What is th c is/xkyd77m*e voltage 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 has a radius of 0.50 mm and a resistil *xj-z vnth0e / g*ysk2)j;jkvity 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 (resistjrsahk 3 fw 9; e97dj*gh8v:wjivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a r ug1k.bp9 1d)a ajtak;kc p26xesistance 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 yy /udgqyy4wzf+ 2 /iip*29 ifof 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 3gjwx s/;pzt3,k:vqeto determine the melting point of indium. The resistance of the p e3z vsgpt,j:3qxw/k;latinum 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 througoo w3m7*(qh ogngy:;hh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1pmv7o6j2 xai *(yfv9t200 W. What current will it draw?

  A 150-W light bulb running on 110 V draws how much c53mfr *3zxrfl urrent?

  What is the nominal resistance of a 100-W light bulb designed to be used in 2mkwu o6+j + p5sevm+ca 120-V circum2uves om6w+ c+k j5p+it?

  A toaster is rated 800 W at 120 V. What is the resistance of itbe, sm5 7mazi1s heating elemen 1a5msb,ie zm7t?

  A 200-W resistor is ratesydak6eb36 8 id at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ratefqcg6h h9op2 :3*gqv(vdzc eo0f -7ped at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, wvtk; 3w 86prua-0s tyzhat current does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is its h7/+ri ogfwx,resistance?

  A 25-W soldering iron runs on 110 Vx z8si4z)4cewv g2a3u ;mtv .e. What is its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hoq 6xuo wnw*;c3urs, if energy co onqc*u3ww;x 6sts $0.08/kWh?

  How much energy does a 100-W light7uwmm(6:aal* c /cujp)yde6u bulb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hou,sy;,(rrf8v+myqzusp o 6xc/os(.r ors. How much heat energy iso,v/c 6pry(os, q rm.sfoy;8xsrz+(u produced?

  A battery is rated at 12 V and 160 A-h. How much energm(y;u c*: tmfg1gicz :y does the battery store?gi:m c;*y:t mu1(fcgz

  How much energy does a 25-W soldering iroys opw,z)d 5my8 t+x1in use in 8.0 hours?

  A 100-W driveway light 2hekzzsvfk pha(k l,;8kb 9v i4ti9 0,bulb is on 10 hours per day. Assuming the power company charges 10 cents for each kilowatt-hour ka (zh0i kb9k2ti;zlf,4h s9k ev,p8v of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitow 7y5dqo o -,zptdt,x4r) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to r5z d ,7 y4otwotqp-,xdun the computer annually?

  The monthly (30 days) electric bill included the cost of running a cee-pa 7ogj e(zx1*a2montral air-conditioning unit for 2.0 hr/day at 5000 W, and a series connection of ten 6omeo j(7 x2-eap *1gaz0 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 uag/jx5o8q)q 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 temperature.) What effect will the repair have on the power dissipated in the heatinj8g5/qo)x aq ug element?

  14 A of current flows through6jzrcx x kh)+* $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs 8)7hp:*xj6+vs h 7mgrg tp* o3putthi $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 ))x., -mq xoyxo r7noxat the rate of 2.0 hp has 60% efficiency. How much current do) r.o7 -xx,mx)qoxyones it draw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rms current flows * t0 ldx*xouli): ba6kw)q0io through ai li oqwodtl*bxu)*0:0) kx 6this device?

  A 500-W device is connected to a 120-V ac power source. What peak currentewuu(ja oq 0.z; bi qm4vrhay) :6*2rt flows through tq iu oe)uvqr0ar(mawz 64t.y b2*hj:; his device?

  A 500-W device is connected to a 120-V ac power source. What is the peak volt0oz2j: l iv1w4ffgr7tage afz :0wfrjli7g o4vt 12cross this device?

  The diameter of a copper wire is 0.081 inch. The mayk) z( aqk:cc/b7xqdp vb*): yximum 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 cav)b*7q(cyk cz :pbxa/y:qd k)rriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)