Question

The ratio of specific charge of a proton and alpha particle is2:11:21:41:1

Answer 1

Specific charge means Charge/Mass ratio 

Specific charge of proton = 1 

Specific charge of alpha particle = 2 (2 protons and 2 neutrons have same mass as protons but charge is 0 

Therefore, ratio of specific charge of protons to alpha particles = 1:2