If the radius of a sphere doubled without changing the charge on it, then electric flux originating form the sphere is:

Double

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Half

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Same

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Zero

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Solution

The correct option is C Same
Electric flux originating from the sphere is same because electric field is independent of the radius using Gaussian law,
$ϕ = \frac{q}{ϵ_{0}}$

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A sphere of radius $1 m$ encloses a charge of $5 μ C$ . Another charge of $- 5 μ C$ is placed inside the sphere. The net electric flux would be :

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