Results 1 to 2 of 2

Thread: magnitude of field at center or rectangle.

  1. #1
    Senior Member
    Jan 2007

    magnitude of field at center or rectangle.

    eletric field magnitude equation: E = F/|q0| or must i use: E k|q|/r^2 ?

    The magnitude of each of the charges in the figure is 9.10 10^-12 C.

    The lengths of the sides of the rectangle are 3.00 cm and 6.00 cm.

    Find the magnitude of the electric field at the center of the rectangle in figures a and b.

    here are the figures:

    need help please.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Junior Member Pinsky's Avatar
    Jan 2008
    I think you should use the second one.
    The constant k is \frac{1}{4\pi\varepsilon}
    I suppose you know the value of k. The only reason you can use E=k\frac{q}{r^2} is because th charges are of the same value.
    You get r by pitagoras theorem. You put all four vectors in point c and write them analiticaly.

    E_2=E\angle arctg\frac{3}{1.5}

    What you have to do here is calculate the vectors then. I'm kind of in a hurry right now, i'll try to solve it in the afternoon, with pictures and everything. Hope you can wait till then.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 4
    Last Post: Apr 17th 2013, 02:31 AM
  2. Replies: 6
    Last Post: Jun 2nd 2011, 04:56 PM
  3. Replies: 1
    Last Post: Nov 23rd 2009, 06:41 PM
  4. Area of a grass field (rectangle + 2 semicircles)
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: Nov 16th 2008, 05:44 PM
  5. magnitude of eletric field.
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: Jan 22nd 2008, 07:43 PM

Search Tags

/mathhelpforum @mathhelpforum