1.

A neutorn a proton an electron and an `alpha` particle enter a region of uniform magnetic field with the same velocities the magnetic field is perpendicular and directed into the plane of the paper the tracks of the palrticles are labelled in the the electron follows the track A. DB. CC. BD. A

Answer» Correct Answer - A
Radius `r=(mv)/(Bq)`
r is least when `(m)q` is least
`(m)/(q)` is least for electron so the electron follows the track D


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