A charge Q is placed at each of the opposite corners of a square. A charge...

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A charge Q is placed at each of the opposite corners of a square. A charge q is placed at each of the other two corners. If the net electric force on Q is zero, then is 9 equals to - D 9 (a)-2√2 (b)-1 a√2 a (c) 1 B (d) √2 A charge Q is placed at each of the opposite corners of a square. A charge q is placed at each of the other two corners. If the net electric force on Q is zero, then is 9 equals to - D 9 (a)-2√2 (b)-1 a√2 a (c) 1 B (d) √2