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Two pith ball of mass 0.5 each are suspe...

Two pith ball of mass 0.5 each are suspended from a common point O by means of silk threads, each of length 20 cm. When the balls are given equal and similar charges, they repel each other so that the two threads make an angle of `60^(@)` with each-other. Determine the charge on each ball.

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The correct Answer is:
`1.12 xx 10 ^(-7)C`
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