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Two identical balls of charge q(1) & q(2...

Two identical balls of charge `q_(1)` & `q_(2)` initially have equal of the same magnitude and direction. After a ubiform electric field is applied for some time, the direction of the velocity of the first ball charges by `60^(@)` and the magnitude is reduced by half. The direction of the velocity of the second ball charges there by `90^(@)`. In what proportion will the velocity of the second ball changes?

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The correct Answer is:
`(v)/(sqrt(3))`
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