given a dipole on z-axis(+q at z=a and -q at z= -a) , find out the non vanishing multipoles using spherical harmonics.(adsbygoogle = window.adsbygoogle || []).push({});

can somebody tell me how to do this problem using spherical harmonics..because when we write charge density using dirac delta function in spherical polar coordinates. then we get

phi = tan^-1 (0/0) because x and y coordinates for both the charges are zero.

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# Homework Help: Multipole expansion

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