Recent content by Josephk1508

I have now worked out all values for the quadrupole matrix, I just need to calculate what Qzz is. If anyone can help that would be really useful. Also I realized I made a mistake above, cylinrical symmetry means that it is dependent only z only.

Homework Statement Show that, if a charge distribution  has cylindrical symmetry, then knowing the value of Qzz allows you to determine the entire quadrupole moment matrix. Homework Equations Tr Q=0, ie Qxx+Qyy+Qzz=0 The Attempt at a Solution Because of the cylindrical...

I still don't properly understand? What do you mean every pair (i,j)?

Homework Statement Four point charges: q at a^z; q at -a^z; -q at a^y and -q at -a^y where ^z and ^y are the unit vectors along the z and y axes. Homework Equations Find the approximate expression (i.e. calculate the first non-zero term in the multipole expansion) for the...