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Three identical charged balls each of charge 2 C are suspended from a common point P by silk threads of 2 m each (as shown in figure). They form an equilateral triangle of side 1 m. The ratio of net force on a charged ball to the force between any two charged balls will be:

1. 1 : 1
2. 1 : 4
3. 3 : 2
4. 3 : 1

Correct answer: 3 : 1

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