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Physics 12 Online
OpenStudy (anonymous):

Please help: Calculate the electric field at the center of a square 52.5cm on a side if one corner is occupied by a +45uC charge and the other three occupied by -27uC charges.

OpenStudy (ujjwal):

Find electric field due to individual charges at the center and do their vector sum. That will give you the resultant field. P.S. you mustn't make any mistake while determining the direction of electric field due to individual charges.|dw:1340434465357:dw|

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