Question

The ratio of specific charge of an $\alpha$-particle to that of a proton is:

• A. 2:1
• B. 1:1
• C. 1:2
• D. 1:3

Answer 1

Answer: (C)

1:2

We know that,

$\frac{e}{m}$ for a proton $=\frac{1}{1}$

$\frac{e}{m}$ for an $\alpha$ particle $=\frac{2}{4}$

Therefore, required ratio $=\frac{1}{2}=1:2$

Hence, this is the correct answer.