1.

A proton of mass m and charge e is projected from a very large distance towards an alpha particle with velocity v. Intially, particle is at rest, but it is free to move. If gravity is neglected, then the minimum separation along the straight line of their motion will be

Answer»

`e^(2)//4 piepsilon_(0) MV^(2)`
`5e^(2)//4PI epsilon_(0) mv^(2)`
`2E^(2)//4 pi epsilon_(0) mv^(2)`
`4E(2)//4pi epsilon mv^(2)`

Answer :B


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