Question

An α particle is accelerated through a p.d of 10⁶ volt then K.E. of particle will be(a) 8 MeV(b) 4 MeV(c) 2 MeV(d) 1 MeV

Answer 1

Alpha particles are He^2+ ions. Their mass is that of four protons and charge is that of 2 protons. Substitute all the values to obtain the answer.