At 2 opposite vertices of a square with sides of length a = 50 cm are located identical positive charges each of charge 10^8 esu and at the third vertex is a charge of the same magnitude but opposite sign. Calculate the magnitude of the electric field at the fourth vertex.

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.