A position charge q is placed at a dista...

A position charge q is placed at a distance of 4R above the centre of a disc of radius R. The magnitude of flux through the disc is `phi`. Now a hemispherical shell of radius R is placed over the disc such that it forms a closed surface. The flux through the curved surface (taking direction of area vector along outward normal as positive), is -

A

Zero

B

`phi`

C

`-phi`

D

`2phi`

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The correct Answer is:

c

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