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[" 73.A particle A has a charge + "q" an...

[" 73.A particle A has a 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 electrical "],[" potential difference,the ratio of their speeds "v_(A)/v_(B)" will "],[" become: "],[[" (a) "2:1," (b) "1:2],[" (c) "1:3," (d) "4:1.]]

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