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  4. If the number of electric lines of force emerging out of a closed surface is 1000 , then the charge enclosed by the surface is

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Q. If the number of electric lines of force emerging out of a closed surface is $1000$ , then the charge enclosed by the surface is

Electric Charges and Fields

Solution:

$\phi=1000=\frac{q}{\varepsilon_{0}}$
$q=8.854 \times 10^{-12} \times 1000$
$q=8.854 \times 10^{-9} \,C$