Calculating potential at a far distance due to a ring of charge. | DAILY # 9

Calculating Potential at a far distance due to a ring of charge.
It is a worked homework problem.

[@juliaifrank]

Wondering why multipole expansion is used to solve this problem? Watch this! th-cam.com/video/qXnYZ8vvp8o/w-d-xo.html

[@AceHardy]

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