ph132s04_hw6

ph132s04_hw6 - 22.141 50 SHEETS 22-442 1013 SHEETS 22-144...

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Unformatted text preview: 22.141 50 SHEETS 22-442 1013 SHEETS 22-144 200 SHEETS 6 AMPAD _J.q L 4E. A small but measurable current of 1.2 X 10"”J A exists in a copper wire whose diameter is 2.5 mm. Assuming the cunent is uniform, calculate (a) the cumnl dcnsny and (b) the electron drift spotted. (Sec. Samplc Problem 213.) : 2.4X/0_§A/mz N 3,; 7/“; (KWWWSXAgamma‘ Kgx/O "‘15 Am [3 flzx/O‘wfi (Mf‘l‘bM) (1’: Zfimm T 2.52m'3m n 6r Copfier’: S’iwx/gz V (40m 50m problem 27—3 {3-66) 50 SHEETS 22-142 100 SHEETS 22-144 200 SHEETS 21—141 ® 8?. Near Earth, the density of protons in the solar wind (a stream of particlcs from [116 Sun) is 8.70 cm", and their speed is 4?!) kmfs. (a) Fund the cm density of these protons. (b) If Earth‘s magnetic field did no! deflect them, the protons would strike [he planet. What total current would Earth then receive? 1;: Won/03% Dr 1361" W a) J? “Fe-1k? .7*/0°M'3 Abox/o-“cMc/fl) X/ost's) -~ Aw. b) L--: a: g 6'37x/06h1)2'(G'5qx/0~7H’4nt) = 9.34W07A Ms. Tire Value 0F R can be finite, (Pant/e Mr fim‘ cover on" He book. Git/cg) -' n;- 3‘. 7om'3 = 870 w “M3 ..__...m_...__._.._._u_....p— .-.. .._v ...._...__.. .. _. .- _.—.. __. _-— —- CH27, 119.-.. “I How iong does iuakeelectronstoget fromacar v- staning motor? Assume the current is 300 A and the el 6 I through a copper wire widl cross-sectional area 0.21 {31112 = 0.85 m. {See Sample Problem 27-3.} «w GIL/aw (=- 300/4 A: O-ZICM’ = 0.2:Kro‘im’ L’CHSM t brfiqL spar} 7’” dew” 6W" 3M, W73: 4's mm 6r 441,5 mam 2% since J ('5 mm: L 535 7W" am as 7% WE? fl}: 3 L ' L ' _L = mg $3.4m“ 3(5MPQ PathZ7-3) é nmmp = 0. in) 0.;x/o‘*m*)(5’.47»70”ms Mon/0”?) 300A =Aw; 22-14l 50 SHEETS 22-142 IOU SHEETS 22-144 200 SHEETS 5 _nm ductor be double its resistance at 200°C? (Use 203°C as the creme point in Eq. 211?: compare your answer with Fig. 27-1 with same “doubling tenrperamre“ hold for all copper con- ' of shape or size? “F. (a) At what temperature would the resistance of a ooper In order +0 Proud“): mm; “SW 4:4, and H=Ho. Zip, 79, =Poa(T-T£) fiygor‘fo‘B) I ‘0'7-4'73 '1‘: gm an):;+g‘mk.. + 20'0- =A~s- Nole= 51f is m am's of k , anal/we adana’Zo‘c fa MW: In #7:; (m i I} IL; 0k,s:hce a l"5 Mu/zip/{Ya/ 9] 47' "’ r’eny. cw (h k‘a/i/ ‘6 «7/6 4%! 54mg _ b513, «Mia, 41% VOZQW'L (z. and/i) ofepmaé a? 24k knapemfizre. - ' 21-141 50 SHEETS 22-142 100 SHEETS 22-144 200 SHEETS ® _ ammo "' made of are same material. that is half as long and diameter? C 0 50 SHEETS 22-142 ‘00 SHEETS 22-] 44 200 SHEETS 22—14! 6 RMMD M067— MTEJLMLS GM 35' Esq-thaws Ag Fomm§.' common flashlight bulb is rated at 0.30 A and 2.9 V (the of the current and voltage under operating conditions). If [stance of the bulb filament at room temperature (20“C) is what is the temperature of the filament when Lhe bulb is on? - em is made of tungsten. llw 7H5” TEM?£/?ATL27¢€ 25?. o): 25557!” n“? F072 we of: MIX:an Tb Nab fioLJVELT’Mc-r 7— BACIL l / ._ ._ To woth 0;: 6Q u)sz P’P'W’D“ 7“: 5N M50671 52mg; A aweg AT 33-4 554.5109 19 gamma“? To A QWQE ON“ THE Hw;m 7.3M?Emwzg smog . UNIT; ARE M07 REALLY "WE— a 60 ’ HEM; [ E .11: co 149975”?— 22-142 loo SHEETS ' 22—144 200 SHEETS ' 22-141 so sums QM .__L gut/w Pr {oow V=/Zov (1051‘ = G¢/kN-h . III. A 100 W lightbulb is plugged into a standard 120 V outlet. (at) How much does it cost per month to Ieava the light tamed on continuously? Assam electric energy costs 612ka - h. (b) What is the resistance of the bulb? (c) What is the can-cm in the bulb? (d) Is the resistance different when the bulb is tamed off? 13 a) mbnwfi (05+ = PG'a'mech} rule) Check #12 unfik.’ . Q, 4 = 000 w)((moflM)(ZOOow-h 2 2:!!! dd 6 ‘9 (OOWX man flmpowhr) ? 432 4 =Aan. Aide-‘Mlkisrfixa army d) WWI a (mail (manna/Waummafiwe oékrmfrra/ #15 "ragtime 01‘ a mow xgmbu/b «7‘ ram kW/e 1r» be mad /0:Sb. A A' mm was bj «#520093: film in jar w wow 1‘0 ES :3 a hudc WWW: dfirme- 51366-126 cm, 1%; F=/o(/f Rafi—3;: 4&0 d/dMH/X’fl a / / J mfsabnce of #4 bulb ante 19‘ :‘5 fitme/ m. 00:3 mam/Mu #1: 5.1.5 2 ‘22 141 50 SHEETS 22-141 100 SHEETS 22-144 200 SHEETS 6 @ a) P= 42!. A cylindricsl resistor of radius 5.0 mm and length 2.0 cm is made of matefial the: has a resistivity of 3.5 X 10'5 I] - In. What are (a) the current density and (b) the potential difference when the energy dissipation rate in the resistor is 1.0 W? (2N6?) -' I": S-Omm 3 6.0x/o"3m [.32. 00m = 2. Oxxo'zm {0 = ESX/O‘vam 1 energy di'fifi'pa‘fib’n mkz Rwy: [0w a) J' b) .V m = (3/4)th = JzfingL: J‘APL my KW : 'é J ‘ I} F L— n [-210 L. IT(50,7011)2(35wom-mY2-0*IO"‘MJ — 4A5- “ P : _.__/;.‘LN________ V: - In r fif6.0xzo"m)zfl-3”0m’“‘) l 200 SHEETS 22 I41 50 SHEETS 12442 100 SHEI'I'S 22444 @ 223. Thempperwindings ofa motor have a resistance ofSO Q at20°thcntbemoloris idle. Afierfl'nemotnrhasmnforseveml Mmmimm riseslsoSS QWhatistheaeInpeI-auneofme Windings unw? Ignm'e changes in the dimensions of the windings. ( Use Table 27-1.) Gil/m: 13,150,.(1, ,‘ig: Zo’c, R= 53.0, 'IQI‘IOfC d'mMSIM changes \_ fir! -' ’F _ Hessiance, and Rembfim'g 5764, #na’ 4 re/afi’mdago Men #16 ab’ magma '2, my fie new Variance R = I N y. "9 C/ 1‘ sue 5170 \C} I 53112, _ __ a 73201.4 4379’0'3R"( 1) 'A/Us. 50 bfltklb 22-142 100 SHEE‘IS 22-446 200 SHEETS 12-141 6) Alum H27’ 3 ’ choices of the radii? 301’- A copper wire and an iron wire of the same length have the same potential difference applied to them. (a) Wham must be the mfiooftheirmdiiifmecurremsinmemowiresaxemhethe same? (b) Can the current densities be made the same by suitable Tw‘ Tau. APE: Aam AL 3 v‘ 7 M -55 H M1;: FFCrAKA-F'ef. 7 ff; -_:'_.1—— LNG {Inn} 2144: too SHEETS 22—144 200 SHEETS 51E. Apomntial diffcmnceof 1.20 Vwillbeappliedtoaiilo m lenglh of lB—gaugc copper wire {diameter = 0.0400 in.). Calcu- lan: (a) the cummt, (h) the aux-mm demjty. (c) the electric field. and (d) the rat: at which thermal energy will appear in the wire. C) E Pom -‘-' P 6?er 008159 J 52:022. 926’, Pa War- I _ M "u: a-9 t- R — R ‘2 c: 1/5.: wide): -- I ’0 (oz. {zaqxxo-S’a-M)(35v°'n) F From 73144 27-: $5: = 2J5 x/o" Mm“ ms. 9: W: (1.7410020 v) = ANS. d Pal: of {Mm/m” dc'sg‘bufifita ems. Suggested Problems / We N See‘following web site suggested problems: http://www.clarkson.edu/~physicslphl32/phl32_homework.htm 50 SHEETS 22-142 100 SHEETS 22-444 200 SHEETS 2244! 3 AMMD 1533 A human being can be elecirocuted if a current as w 50 mA passes near the heart. An electrician working with 3‘ hands makes good contact with the two conductors he is he HE Mow'mzz—Z 9%»! As gm?" CAN GREATLY mamas 7/'/£ 259/5er @F7'fiE Hum '30ij wmnc; A 79an HTML. b/FFERENCE of: one]! IOOV FATAL. _- WW.“ Nyefiwwmwfiwm. _ 50 SHiETS 22-142 100 SHEETS 22-444 IOOSHEETS 22-l41 3 “MW f iii. A student kept his 9.0 V. 7.0W radio mmcd on at full volume from 9:00 pm. unzi] 2:00 am. How much charge went {trough it? EV Mil/A3272 a a) .942; 5 Ton :5 r Z 7" f AfisuerXL THE WHEAT is. cams-TAMI“. ! ; 0 i ’2 I E : IT i | IN, A Ewcg Amid-.5. Lumcyg A T’o’r‘. szF. V .119 Mm‘r NEE _ ?=— IV 7 a I: -'— r? .22). f> T V :f 50 SHEETS 22442 100 SHEE'FS 22444 200 SHEETS 22-14] 6 1|an 3". A 1250 W radian: heater is constructed to operate at 115 V. (a)WhaI will be the men! in the hatter? (b) What is_ flieresistanc‘ze I of the heating coil? (c) How much thermal energy 15 produced In * mhbythcbeamr? seam ilv m TD "705mg? gamma :9 EODWALENT THEE” LOOZV— bond-7f abet: 9px;; Papa’— I9 Trig MEAT WHICH wow—Is fig; E i I ' "’ "'-“1Wmmwwm n In so aunts 22-142 100 sun-rs 22-144 zoo sun" ® 531'. Acylhldrical resistorofradius 5.0mmdlcngth 10cm ismdeufmatcriai Mbnarcsisfivityof35x 10—59~m. Wm(a)thecurrcmdcnsityand{b)mepowuialdiffcm1cc mmmgydissipafionmcinflaemsismris LOW? ll Eadiam' d) P= {ZR = (JAYR = Jznzggr. J‘APL Fr; :4 =m: flow A (sowofi) 73.5??0139 _ 2. orv 1716-0 :10“ ’MYfl- BKIO‘A’M ‘) Gwen -' r: SUM 3 5.0xro'3m L‘ZOom" [Ox/0'11!" {o= 3-5H0’saflr M A energy dl'fifi'pdflm Rwy;- [0W b)_V .- ‘ g -m)(2.orzo“‘M) i =3“; i . ._._......¢. . ...-.- ...._— "-L . - - E L E; E- ...
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ph132s04_hw6 - 22.141 50 SHEETS 22-442 1013 SHEETS 22-144...

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