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Q2. Find the monopole term in the multi-pole expansion of the electric potential on the z-
axis for a flat circular charged disk of radius R and charge density o (r,q) = kr' cos q,
where k is a constant and r, q are polar coordinates with the origin at the disk's centre.
1
- kR²
4πεο
1
- kRª
16€,
(b) Vm
1
k
(c)Vm
(d) Vm
(a) V = 0
%3D
4πεο
R

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