Four Equal Negative Point Charges Are Located at the Corners

question 3

Multiple Choice

Four equal negative point charges are located at the corners of a square, their positions in the xy-plane being (1, 1) , (-1, 1) , (-1, -1) , (1, -1) . The electric field on the x-axis at (1, 0) points in the same direction as

• A) .
• B) .
• C) -
• D) .
• E) - .

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