Question

The total electric flux emanating from a closed surface enclosing an $\alpha$-particle (e = electronic charge) is

• A. $\frac{2e}{{\epsilon }_0}$
• B. $\frac{e}{{\epsilon }_0}$
• C. $e{\epsilon }_0$
• D. $\frac{{\epsilon }_{0}e}{4}$
• E. $\frac{4e}{{\epsilon }_0}$

Answer 1

Answer: (A)

By Gauss theorem
$|{\varphi }_E|=\left|\frac{q}{{\epsilon }_0}\right|$
= $\left|\frac{-2e}{{\epsilon }_0}\right|$
$\frac{q}{\epsilon }=\frac{2e}{{\epsilon }_0}$