Question

Order of $\left[\frac{e}{m}\right]$ ratio of proton, $\alpha$ particle and electron is

• A. e > p > α
• B. p > α > e
• C. e > α > p
• D. None of these

Answer 1

The correct option is A

e > p > α

${\left[\frac{e}{m}\right]}_p=\frac{e}{m_p}{\left[\frac{e}{m}\right]}_{\alpha }=\frac{2e}{4mp}=\frac{e}{2m_p}{\left[\frac{e}{m}\right]}_e=\left[\frac{e}{m_e}\right]$