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  4. A charge Q is enclosed by a Gaussian spherical surface of radius R. If the radius is doubled, then the outward electric flux will

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Q. A charge $Q$ is enclosed by a Gaussian spherical surface of radius $R$. If the radius is doubled, then the outward electric flux will

AIPMTAIPMT 2011Electric Charges and Fields

Solution:

$\phi_{\text{ net }}=\frac{2 q }{\epsilon_{0}}$
$\because$ Net flux does not depend on size of Gaussian surface
$\Rightarrow $ Flux remains unchanged.