1. froodles01

    Algebra: Coulomb's law & electric field

    Quite a simple thing, but can't work out one step. Charge √3Q is at cartesian point (3a, a, 2a). Calculate the electric field at the point (2a, 2a, 3a) due to this charge. using the formula; E(r) = q / 4 ∏ ε0 |r - r0|3 (r - r0) Here r = (2a ex + 2a ey + 3a ez) r0 = (3a ex + a ey + 2a ez) r -...
  2. M

    Coulombs law and Electric Fields

    HI there. I am revising for my A level Physics exam in January. I have printed out past paper questions, but have no qnswers to them! I have worked through this question and was wandering if anyone could check to see I have done it correctly. Any help greatly appreciated. Two point charges...
  3. J

    An easy question with coulomb force

    three identical point charges of q are placed at the vertices of an equilateral triangle x cm apart. calculate the force on each charge is the ans F = (Qq*sqrt(3))/x^2