1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: E fields from charged rods

  1. Nov 21, 2006 #1
    now, i have absolutely no idea what the heck that means, and doubt i ever will, but my boyfriend is doing a dgree in electronic engineering and is studying fields and devices at the moment and is really stuck so i was wondering if anyone could help!!!

    His notes say "the total e field is the vector sum over all the N charges. If we line up our axes so that the charges are on the x axis then we get..."
    a really long equation. (i would write it here, but theres no way to get all the equations symbols!)

    THe equation has a x' in it, and he has no idea what the notation means.

    im probably not making any sense to anyone, but i just wanted to see if i could help him (im studying for a law degree so this is all spanish to me!)

    thanks so much,

  2. jcsd
  3. Nov 21, 2006 #2


    User Avatar
    Science Advisor
    Gold Member

    Often a primed variable is used to indicate the position of a source while an unprimed variable is the observation point. Why not have your boyfriend post his question here?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook