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a). Calculate the magnitude of the electric field at the center of a square 42.5cm on a side if one corner is occupied by a −38.9μC charge and the other three are occupied by −26.9μC charges.


b). Choose the correct direction of the electric field at the center of the square.

perpendicular to the diagonal passing through −38.9μC charge
outward of −38.9μC charge
toward to −38.9μC charge

Sagot :

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