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Q.

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

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a

$\frac{2 e}{ε_{0}}$

b

$\frac{e}{ε_{0}}$

c

${eε}_{0}$

d

$\frac{ε_{0} e}{4}$

answer is A.

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Detailed Solution

By Gauss' theorem,
$|ϕ_{E}| = |\frac{q}{ε_{0}}| = |\frac{- 2 e}{ε_{0}}| = \frac{2 e}{ε_{0}}$

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