Target Exam

CUET

Subject

Physics

Chapter

Electric Charges and Fields

Question:

What is the total electric flux coming out from a closed surface enclosing an alpha particle? Given $e=1.6 × 10^{-19} C$

Options:

$\phi=\frac{e}{ε_0}$

$\phi=\frac{e}{2ε_0}$

$\phi=\frac{4e}{ε_0}$

$\phi=\frac{2e}{ε_0}$

Correct Answer:

$\phi=\frac{2e}{ε_0}$

Explanation:

The correct answer is Option (4) → $\phi=\frac{2e}{ε_0}$

According to Gauss law,

$\phi=\frac{q_{enclosed}}{ε_0}$

Charge enclosed in an alpha particle, $Q_{enc}=+2e$

$∴\phi=\frac{2e}{ε_0}$