ChevyBoy95 Posted May 1, 2016 Report Share Posted May 1, 2016 I have an upcoming exams and one of the things I am stuck on is how to get the electric field, potential difference (easy once I have E), and power dissipated. Problem is : Aluminum wire with cross sectional area of 4x10^-6 m^2 carries a current of 5A. Density of aluminum is 2.7g/m^3. Assume each aluminum atom supplies a conduction electron per atom. Find the (a) drift velocity, (b ) current density, (c ) electric field, (d) potential difference, and (e) power dissipated. I know what (a) and (b ) are which is 1.3x10^-4 m/s and 1.25x10^6 A/m^2 respectively. Just don't know where to go from here to find a force or whatever to get a field/potential difference. And if there is possibly info that i would need to get the unknowns that otherwise wouldnt make it possible let me know. *this isnt for a grade, just trying to review. Thanks guys. Best Score to Date : 160.5 dB Outlaw (47Hz)[4 XM 15's & 2 Taramps Bass 12k's] BL : http://www.stevemeadedesigns.com/board/topic/147800-chevyboy95s-4-15s-7krms-wall-1533-db-on-half-power/YouTube: http://www.youtube.com/hitemwiththeflex/ Link to comment Share on other sites More sharing options...
ShadeTreeMechanic Posted May 1, 2016 Report Share Posted May 1, 2016 I thought drift velocity was the speed at which you would steer a car through the corner with the throttle. You might get more answers if you post this in the Physics section. lol No really, I'm tuned in. There should be an equation for the magnetic field. It also would seem that you would have to figure out the voltage before you could get the power? We need Tony D. Is he back yet? 91 C350 Centurion conversion ( Four Door One Ton Bronco) 250A Alternator (Second Alternator Coming Soon) G65 AGM Up Front / Two G31 AGM in Back Pioneer 80PRS CT Sounds AT125.2 / CT Sounds 6.5 Strato Pro component Front Stage CT Sounds AT125.2 / Lanzar Pro 8" coax w/compression horn tweeter Rear Fill FSD 5000D 1/2 ohm (SoundQubed 7k Coming Soon) Two HDS315 Four Qubes Each 34hz (Two HDC3.118 and New Box Coming Soon) Link to comment Share on other sites More sharing options...
3vil Posted May 2, 2016 Report Share Posted May 2, 2016 Have you checked with Wolfram Alpha, or Khan Academy? Link to comment Share on other sites More sharing options...
ChevyBoy95 Posted May 2, 2016 Author Report Share Posted May 2, 2016 Have you checked with Wolfram Alpha, or Khan Academy? Yes and about an hour or more of searching online through various sources. Best Score to Date : 160.5 dB Outlaw (47Hz)[4 XM 15's & 2 Taramps Bass 12k's] BL : http://www.stevemeadedesigns.com/board/topic/147800-chevyboy95s-4-15s-7krms-wall-1533-db-on-half-power/YouTube: http://www.youtube.com/hitemwiththeflex/ Link to comment Share on other sites More sharing options...
ChevyBoy95 Posted May 2, 2016 Author Report Share Posted May 2, 2016 I thought drift velocity was the speed at which you would steer a car through the corner with the throttle. You might get more answers if you post this in the Physics section. lol No really, I'm tuned in. There should be an equation for the magnetic field. It also would seem that you would have to figure out the voltage before you could get the power? We need Tony D. Is he back yet? It is for electric field E, not magnetic field B. Best Score to Date : 160.5 dB Outlaw (47Hz)[4 XM 15's & 2 Taramps Bass 12k's] BL : http://www.stevemeadedesigns.com/board/topic/147800-chevyboy95s-4-15s-7krms-wall-1533-db-on-half-power/YouTube: http://www.youtube.com/hitemwiththeflex/ Link to comment Share on other sites More sharing options...
ChevyBoy95 Posted May 2, 2016 Author Report Share Posted May 2, 2016 Think I might have found it. Was probably missing info from the problem which would be resistivity of the metal, or Rho. Current Density = E/Rho where Rho is resisitivty, or Current Density = E(sigma) where sigma is conductivity. Best Score to Date : 160.5 dB Outlaw (47Hz)[4 XM 15's & 2 Taramps Bass 12k's] BL : http://www.stevemeadedesigns.com/board/topic/147800-chevyboy95s-4-15s-7krms-wall-1533-db-on-half-power/YouTube: http://www.youtube.com/hitemwiththeflex/ Link to comment Share on other sites More sharing options...
Karkov Posted May 2, 2016 Report Share Posted May 2, 2016 Where's Alan or Krakin, LOL Letters have no place in math 2007 Chevy Tahoe (SOLD) 12 ~ FI Audio X series 10" w/BP option 2 ~ DC Audio 5.0K @0.67 3 ~ DC Audio 5.0K @1.0 2 ~ PPI 3 way sets (not installed yet) 1 ~ RF T400-4, 1 ~ RF T600-2, 1 ~ RF T600-4 4 ~ CT Sounds 5.25" Strato comps (rear fill only) 1 ~ XS Power D4800 1 ~ XS Power D3400 8 ~ XS Power XP3000 160 stock alt, Mechman 370 Elite, 185 DC Power 320+ Sq. Ft. Sound Deadener Pioneer AVH-X5500BHS Youtube: https://www.youtube.com/user/knfjdkghjudfhsgkjdhf/videos?sort=dd&view=0&shelf_id=0 Link to comment Share on other sites More sharing options...
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