Recent content by wml

  1. W

    What Is the Potential Energy of a Charge Near an Infinite Sheet and a Long Wire?

    well, actually I'm still confused but I entered the answer and it was right >,< I didn't skip any words... what I put on the first post is exactly I have on my paper
  2. W

    What Is the Potential Energy of a Charge Near an Infinite Sheet and a Long Wire?

    never mind~ I got the right answer~! ^^: finally Vb-Va=-21n×1.5/2Eo -> Vb=1300-1779.661= -479.661 VB-VA(0)=50n/ (2лEo) × Ln(3.2/1.7) = 568.7519 3.2-1.5=1.7 U=q(Vb+VB) = 2.4n × (568.7519-479.661)=2.13818×10^-7
  3. W

    What Is the Potential Energy of a Charge Near an Infinite Sheet and a Long Wire?

    An infinite sheet of charge that has a surface charge density of 21 nC/m2 lies in the yz plane, passes through the origin and is at a potential of 1.3 kV. A long wire having a linear charge density of 50 nC/m lies parallel to the y-axis and intersects the x-axis at 3.2m. The permittivity of...