Question

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

• A. 1 : 4
• B. 1 : 2
• C. 4 : 1
• D. 2 : 1

Answer 1

Answer: (D)

Ratio of specific charge of a proton and $\alpha -$ particle is
$=\frac{e/m_p}{2e/4m_p}$
$=\frac{2e/m_p}{e/m_p}=\frac{2}{1}$