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

[" 3.A particle "A" has charge "+q" and 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 speeds "(v_(1))/(v_(B))" will become "],[[" (a) "1:2," (b) "2:1],[" (c) "1:4," (i) "]]

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