Recent content by SilverBullet

I don't have a book or notes unfortunately. It's from an exam paper. Thanks, I will try later

Ok, I understand this fine. Hmm. The only other equation I know for electric field strength is E = F/Q which won't work cause we don't have a force.

Oops, I was trying to keep the question less restricted. I don't seem to be able to edit my post but it should read: " resultant from 3 line charges of 2nC/m, 1nC/m and -1.5nC/m located at (x=y=1), (x=-1,y=2), (0,2) respectively." Sorry but could you elaborate on your first sentence. And...

Homework Statement Calculate the electric field strength and the direction on the z-axis resultant from 3 line charges of blah blah and blah located at (x,y), (x1,y1), (x2,y2) respectively. Homework Equations I assume I just use E = k.Q/r^2 The Attempt at a Solution So I work out...