A thin insulating rod, running from z = a to z = + a, carries the
Question:
A thin insulating rod, running from z = – a to z = + a, carries the indicated line charges. In each case, find the leading term in the multipole expansion of the potential:
(a) λ = k cos(πz/2a),
(b) λ = k sin(πz/a),
(c) λ = k cos(πz/a), where k is a constant.
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