Physics Question (About point charges)?

noone

New member
Four identical point charges (+4.0 ?C) are placed at the corners of a square which has 20-cm sides. How much work is required to assemble this charge arrangement starting with each of the charges a very large distance from any of the other charges?


A. +2.9 J B. +3.9 J C. +2.2 J D. +4.3 J E. +1.9 J

Its a hard question compared to all the others i have sooo if someone can help me pleaseee i dont even know where to start
 
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