A proton (mass m and charge `+e`) and an `alpha`-particle (mass `4` m and charge `+2e`) are projected with the same kinetic energy at right angles to the unifrom magnetic field. Which one of the following statements will be true?

A proton and an alpha -particle are projected with the same kinetic energy at right angle to a uniform magnetic field. The ratio of the radii of their paths is

Statement-1: A proton and an alpha - particle are projected with the same kinetic energy at right angles to a uniform magnetic field, then the alpha -particle will move along a circular path of smaller radius than the proton. Statement-2: Bqv=(mv^2)/(r)

A proton and an alpha particle is projected with equal kinetic energy in transverse uniform magnetic field B. The ratio of radii of proton to that of alpha particle is

A proton and an alpha - particle is projected with equal kinetic energy in transverse uniform magnetic field B. The ratio of radii of proton to that of alpha particle is

A particle of mass m and charge q is placed at rest in a uniform electric field E and then released, the kinetic energy attained by the particle after moving a distance y will be