A device that produces ele1) r7z / rwiut pw*:rt(zv(dnrctricity by transforming chemical energy into electrical energy is calrurzwpzrt t( )wd7 v:(r1i/n*led a

  A car battery

  The total amount of charge that passes thr j :p;a)bcgv;jj4 pcy;tane3;ough a wire's full cross section at any pcb4;jagyap;n; :ctjp3 j )v; eoint per unit of time is referred to as

  The direction of convention current is tci(b-8y3rd+mrd tdu *aken to be the direction that

  A coulomb per second is the samha at3;jx u9hf7glf3 ;e as

  Car batteries are rated in "amp-hours." This is a measure o 3 cc1ne1puf 0a+klnd9f their

  The resistance of a whdmrt9 1p,)ll xvdn//ire is defined as

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

  The resistance of a wire i6) r.fjxep5lz:k hey 3s

  The resistivity of a wire deputr hcr ,lj6 n11()y. 3toas3 (ncqxsmends on

  Which conducting materi2(2* 1,p- ar0hq zj vcdoqnn3oei fg-tal has the lowest resistivity value?

  Consider two copper wires. One has twice the lerzzx77 l*r4j *w:en(js) nikrngth of the other. How do the resistivities of these tn k) irr7xrl sz7w4n*jj*e:( zwo wires compare?

  Consider two copper wires.lldv( d-*ql9f.4cazd4:j /q kt ifw 3w One has twice the length of the other. How do the r: cd4tdd4il39fj k(zwq. wlqf*/va-lesistances of these two wires compare?

  Consider two copper wirea 28sf qxo22ths. One has twice the cross-sectional area of the other. How do the resiq 22af hs2otx8stances of these two wires compare?

  Consider two copper wirec:gon*a 2dn-3ad u1hj s. One has twice the length and twice the cross-sectional area of the other. How do the resistances 1ajdhandgun- 23oc* :of these two wires compare?

  The length of a wire is doubled and the radius is doubled. By what5q*qj5p* ;q,9oh qutfscc,i th68zgh factor does the resistance changecjt*qhih5 pc,gst5q* q; hzo 98u6qf,?

  How much more resistance does a 1.0 cm diameter rod jf j8r4d wd 4bh)8-avu. cmc)p- try1mhave compared to a 2.0 cm diameter ujhc8vymwd4dpfcjb ))-8m-r a 1.4 trrod of the same length and made of the same material?

  The resistivity of most common metals tbp,-)adnb06 k+d0be gxr*iqm 9m5 un

  Negative temperature coe3sl5kn y,k f2zfficients of resistivity

  What is 1 W equivalent jojyx5iic62q2 go3 n( to?

  A kilowatt-hour is eqw3 za vp-23j-t7ulvf/3dfr t puivalent to

  If the resistance in a constant m 1 2e1bbm;e-r;wpee)drar 4kvoltage circuit is doubled, the power dissipated by that circuit willeb1e 4w ame r1)rmb;ke2- ;rdp

  If the voltage across a circuit of constant resistance is doubled, the po- jmtko 71iz/fwer dissip-7k mjtf1/iozated by that circuit will

  If the resistance in a circuit with constant current fadzb:gv*m/- ft98t zelowing is doubled, the power dissipated bf/* 89 vad zbt-mgt:zey that circuit will

  If the current flowing through a circuit of constant rhexkd0ws d( 42xqm 5qy.zjz62esistance is doubled, the power dissipated by that circuit will2q4qd( dyhe 6 0wx.x5kzmjz2s

  During a power demand, the voltage output qi*qvll *ryl2 q k,5i6is reduced by 5.0%. By what percentage is the power oi*v* 2yl5,lrlkiq6qq n a resistor affected?

  A current that is siiydh3sc na - 8+qr1rx(nusoidal with respect to time is referred to as

  Consider two copper wires each carrying a current of6) x6m g.lvsdul d8eav t(0;nq 3.0 A. One wire has twice the diameter of the other. The ratio of the drift velocity in then u)laveq(8 .gm6v 0dlstd 6x; smaller diameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomes esvuhmhtj7(su g,(0k+ jsentially zero at very low temperatures are referred to t js+hj 7,k((mvuug0has

  What current is flowing if 0.67 C of chargegy 8 8xgr/tbunooz/38dq81tf pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus in 2.0 min. Whatrooi2 snt16 -h is tr12 ohnsi6to-he average current?

  How much charge must pass15 pb hs jt i2+hn7)ixf9b/hck pnd*2a by 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 flow ,,up33t unv7m4gd piping 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 ;i n : esx++*:dhp(j z ig(kgl7pyyn*icurrent, has been left on for 10 min. What is th n(kg:hyg p ns(+jyl*deip+: 7;i ixz*e net number of electrons that have passed through the coffee maker?

  In an electroplating procesftg,- vc6 q2z*zb4hiis, 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,6 h bzfzt *giv4i-2cq 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 through kai68, p x,0r i-mwupaa resistance of 8,6ma akiwir-ppu,0x 330 W?

  What is the voltage across a 5.0-r/e6qas /d 9u h(vo+xfW resistor if the current through it is 5.0 A?

  A 4000-W resistor is connected acrcbzqyw 11i /a6rr 9j;xoss 220 V. What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its resis1toxxk,v -i5 ttance?xit tk51 -vx,o

  A 12-V battery is connected to a 1paj018 ocae3y00-W resistor. How many electrons flow through the wire i0yo1eapj c83 an
1.0 min?

  What is the resistance of 1.0 6be5 ai i9j(aq1ihq 32ykknzi/5u2q jm copper wire of diameter 0.40 inch? (The resistivity in 5qj e /k ia9h35(zqiui2bqk162jayof copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a ci99id6wp f 0ujxrcular rod 1.0 cm in diameter and 45 m long, if the resi p06fdx9j9 iuwstivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire 1ormflk*f x y,m5() fhx4f*wj(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 (resistivirrnc7m 6 b1ta6ty $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 resistk7( o zjt gamdx8(2o6wivity?

  Calculate the current through n+153 y rj1fhkefx,qbnfgybo we44/:a 10.0-m long 22 gauge (the radius is 0.321 mm) nichrome wire if i3wb /+gbef1 5ynn xjr:kq,ff4ey1o h4t 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 b.yi;q 5s: z x7fthhb.and of rectangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carries 4000hf5 q ;.xs:hy.7ibztb A? (The resistivity of copper is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichrome wire r,m oo( 6rw-q-t3b ttohas 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 (resistivity;v :3gi8 p*v6 -ikkaxl* kkbhw $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistance of kfsmw832lj *m $18 \Omega$ 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 res rhlbl;+ouvy)6 .,dq4 rkh8k5plk i+eistivity 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 pointg* ;d)xa guxd6 of indium. The resistance of the plxxdg6 gu;da*)atinum 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 ano) zd 0nump4*d $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. i t9q9y,1 gqzlizyh wq26r3c: What current will it draw?

  A 150-W light bulb running p 5iw:o *te.b+qb)tv kon 110 V draws how much current?

  What is the nominal resistance of a 100-W lie5r h*1c ph1it5r0zutght bulb designed to be used in a 120-V cipht tz5ce 105r*1i uhrrcuit?

  A toaster is rated 800 W at 120 V. Wharv:/0nu18(cngy tuh at is the resistance of its heating element?uv10(h a 8yct:gunnr/

  A 200-W resistor is r*nw5+ ( xpoo mxi+kw/kated at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rate77bo y;z u9jd8kb4swg d at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used aoxm3r0b*exlu e08s n *3bjeq2t 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is its resistanc41 qr3 ckxb/1zfxw+3 ge eo:dae?

  A 25-W soldering iron runs on 110 V. What is iu sesayd ;9/s;ts resistance?

  How much does it cost9gfyq1y x 0is1 to operate a 25-W soldering iron for 8.0 hours, if energy 91 xigsy1fq y0costs $0.08/kWh?

  How much energy does a 100-W2oj 3zo 1fo7rx light bulb use in 8.0 hours?

  A 1500-W heater is connecrn) vv8roh; m,ted to a 120-V line for 2.0 hours. How much heat energy is produo,h8rmvnv r ;)ced?

  A battery is rated at 12 V and 160 A-h. How ,gqe.su1uszypz. ;oe xxd c+5+ 5br.w much energy does the battery store?ysq ex + wdg.s+15 zu;bxpo.,ruzce5 .

  How much energy does a 25-W sp1on7tdx 4x) soldering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assuming the powec kiygui*gh 8b3 r);xtxx; /)er company charges 10 cents for each kilowatt-hour of electricity used, estimxti)b*3 u8;)/ghxgce k;xri y ate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is tuzyhs *o9wv4xw j -uir0a8*7qd rned on 8.0 hours per day. If electrwv7i*yj0w 4qo8h d*r9zus xa- icity costs 10 cents per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electric bill vz)zj7 7 mygq -t+/mk h:ohi(1+r mb xkz*s4nxincluded 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 lighm j+)+7gmxqy( bzz* s xk v1-ohk/7zt:n4himrt 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 24 utteo3py*t180 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 tempertt83*pu tyo1eature.) What effect will the repair have on the power dissipated in the heating element?

  14 A of current flows thj+ -gd2 yt/e2f) nojb3zmwyf1rough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery cost) g 4g7fdtl dqf.1g70u azko0ys $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% efficien6v/fnxg 0q79cd vcna-s67 m9 nw(wregcy. How much current does it draw from a7 nwf rq906(c-/76eva sn w9mvcgngdx 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rms current fjfdb b5tbq5bcz*0 ,m ;lows through this devi550b m d,jzbc;b*qbtfce?

  A 500-W device is connected to a 120-V ac power source. What peal ,p,ul)5 qcikq7)k(;qknhwwmc)eyg - 7h+ltk current flows through7 ;ew,kqlnqqwpc(+mtk5)y) chlul- )g, k i7h this device?

  A 500-W device is connected to a 120-V ac power source. What iseyql.0 0x5a cz3b1app the peak voltageb cly0.1pz3e a0x5a pq across this device?

  The diameter of a copper wire is 0.081 inch.:xfv5 dp j(ekjlb -( rpus(w+, 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 centimetefbw( ,pse:l5rupx(jd v(kj+- r of copper is $8.5 \times 10^{22}$.)