A sphere of radius $R$ and charge $Q$ is placed inside an imaginary sphere of radius $2R$ whose centre coincides with the given sphere. The flux related to imaginary sphere is
A sphere of radius $R$ and charge $Q$ is placed inside an imaginary sphere of radius $2R$ whose centre coincides with the given sphere. The flux related to imaginary sphere is
- A
$\frac{Q}{{ \in _0}}$
- B
$\frac{Q}{{2 \in _0}}$
- C
$\frac{4Q}{{ \in _0}}$
- D
$\frac{2Q}{{ \in _0}}$
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