Question

The ratio of specific charge (e/m) of a proton to that of an α-particle is :

Answer 1

The ratio of e/m of a proton to alpha particle is 2:1

Answer 2

Answer

Proton

Mass no. =1

Charge = +1

Specific charge =1

α particle

Mass no =4

Charge = +2

Specific charge = 2/4 = 0.5

So the specific charge (e/m) vale of a proton to that of an α particle is 1/1/2 (or) 1:1/2

HOPE IT HELPED !!!!