A particle A has chrage +q and a particl...

A particle `A` has chrage `+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

`2:1`

`1:2`

`1:4`

`4:1`

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