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DLS

  • one year ago

Find the force on any vertice on a cube because of the rest.All edges have same charge i.e q.

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  1. DLS
    • one year ago
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    |dw:1364748658135:dw|

  2. goformit100
    • one year ago
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    Use coulombs law to find the Required Answer...

  3. DLS
    • one year ago
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    thanks

  4. electrokid
    • one year ago
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    |dw:1364749278793:dw|

  5. electrokid
    • one year ago
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    and ON the surface of cube?

  6. DLS
    • one year ago
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    please leave it till here,i want to try it.

  7. electrokid
    • one year ago
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    knock your self out :)

  8. DLS
    • one year ago
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    yeah!

  9. electrokid
    • one year ago
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    but, your question says, "find the charge"?

  10. DLS
    • one year ago
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    that place u assumed as 0,0,0 we have to find there due to rest 7 charges

  11. electrokid
    • one year ago
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    find what? force?

  12. DLS
    • one year ago
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    yeah!

  13. electrokid
    • one year ago
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    no. force at any point on the cube. so, a point P on the cube.

  14. DLS
    • one year ago
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    on the edge

  15. electrokid
    • one year ago
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    well, off you go then.

  16. Mashy
    • one year ago
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    answer mila kya?! :P

  17. DLS
    • one year ago
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    will try in smtym

  18. Mashy
    • one year ago
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    and i didn't get the question.. is it to find the electric field at any point on the cube?!

  19. DLS
    • one year ago
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    on any edge

  20. DLS
    • one year ago
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    all edges have a charge

  21. Mashy
    • one year ago
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    there is a difference between vertices and edge you know :P.. all charges are on the VERTICES.. so you need to find electric field at any point on an edge?!

  22. DLS
    • one year ago
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    yeah

  23. Mashy
    • one year ago
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    its 3d vector analysis man :-/

  24. DLS
    • one year ago
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    i suckat it

  25. Mashy
    • one year ago
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    its not easy.. you ll have to go brutal math here!

  26. Mashy
    • one year ago
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    yea then its piece of cake.. just use i j k form.. !

  27. DLS
    • one year ago
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    :/

  28. DLS
    • one year ago
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    ata hoga usse yr

  29. yrelhan4
    • one year ago
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    @shubhamsrg Who else? :')

  30. shubhamsrg
    • one year ago
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    E at any point on the edge ? this can't be the question, please recheck.

  31. DLS
    • one year ago
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    on vertice

  32. shubhamsrg
    • one year ago
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    |dw:1364751725488:dw| Please circle/mark the position where you want to find the electric field

  33. DLS
    • one year ago
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    |dw:1364751777632:dw|

  34. shubhamsrg
    • one year ago
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    a charge is kept there? and we have to find E on that? -_-

  35. shubhamsrg
    • one year ago
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    hmm, so you want to find the net force acting on the charge.

  36. DLS
    • one year ago
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    force

  37. yrelhan4
    • one year ago
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    force nikalni hai? lol

  38. DLS
    • one year ago
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    yes :/

  39. DLS
    • one year ago
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    tume samaj agaya ques :")

  40. DLS
    • one year ago
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    @yrelhan4 ata hai??!!

  41. yrelhan4
    • one year ago
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    Hmm shayad ho jayega. but abhi nhi kr rha mai. biomolecules kr rha hun.

  42. Mashy
    • one year ago
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    Dls.. you seriously need to get your terminologies right :-/.. !!!!

  43. yrelhan4
    • one year ago
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    ^ best response.

  44. electrokid
    • one year ago
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    It does not matter at what corner you find the net force. use the 3D distance vectors. The individual forces would be way easier that way.

  45. Mashy
    • one year ago
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    yea... just use position vectors as marked.. and keep your Forces in i j k format.. and then finally add them up and get the magnitude !!

  46. electrokid
    • one year ago
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    |dw:1364753502863:dw| and so on

  47. electrokid
    • one year ago
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    they'd all have a common factor of \[k{q^2\over a^2}\]

  48. electrokid
    • one year ago
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    just be careful with the signs.. since the forces will be directed along the position vectors but in opposite direction

  49. DLS
    • one year ago
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    @shubhamsrg

  50. DLS
    • one year ago
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    @electrokid

  51. DLS
    • one year ago
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    doubt!

  52. electrokid
    • one year ago
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    shoot it.

  53. electrokid
    • one year ago
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    @DLS yes?

  54. DLS
    • one year ago
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    |dw:1364821535025:dw| Naming them like that for meanwhile. Now what I have is, \[\large F_{DA}=\frac{kq^2}{a^2}\] \[\large F_{CA}=\frac{kq^2}{\sqrt{2a}^2}cos45^0\] Fca=Fba am i correct with the magnitudes till here?help me determining the directions too! i want to clarify everything tilll this point first.

  55. DLS
    • one year ago
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    in the end i meant Fba=Fda* sorry

  56. DLS
    • one year ago
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    @electrokid !

  57. electrokid
    • one year ago
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    if you mean \[F_{CA}=\frac{kq^2}{a\sqrt{2}}\] then you are correct. since all charges are alike, the forces are repulsive and act along the distance vectors from other charge to A.\\ in my above diagram I give two such directions. look it up

  58. DLS
    • one year ago
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    yes i meant a root 2 only sorry!

  59. DLS
    • one year ago
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    I didn't get the direction part,where will the force act?

  60. electrokid
    • one year ago
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    that cos 45 should not be there!

  61. DLS
    • one year ago
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    why?:|

  62. electrokid
    • one year ago
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    how did you get it to begin with?

  63. DLS
    • one year ago
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    IDK when we take components and when not :/ im so confused..

  64. DLS
    • one year ago
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    my teacher taught me though,im still messed up with everything.

  65. electrokid
    • one year ago
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    "components of a force" you are talking about magnitude. do not include that cos... it'd show up automatically with the vectors.

  66. electrokid
    • one year ago
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    when you take vectors like they are, all the things come with it like a package.

  67. DLS
    • one year ago
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    okay so dealing with only mag,im correct till here?

  68. electrokid
    • one year ago
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    yes. but if you take cos 45, you'd have to take unit vectors.. this increases your work. my advice, do not take that cos45 and simply find the vectors

  69. DLS
    • one year ago
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    yes i eliminated that ,rest is correct right? and just that a root 2 thing

  70. electrokid
    • one year ago
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    yes. rest seems fine.

  71. electrokid
    • one year ago
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    take hintf from the previous picture

  72. electrokid
    • one year ago
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    I gotta go now.

  73. DLS
    • one year ago
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    please tell me how to do that XZ thing :|