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[" A particle "A" has charge "+q" and a ...

[" A particle "A" has charge "+q" and a particle "B" has charge "+4q" with each of them having the same mass "m" .When "],[" allowed to fall from rest through the same electric potential difference,the ratio of their speed "(v_(A))/(v_(B))" will become "],[[" (A) "2:1," (B) "1:2," (C) "1:4," (D) "4:1]]

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