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The respective radii of the two spheres ...

The respective radii of the two spheres of a spherical condenser are `12 cm` and `9 cm`. The dielectirc constant of the medium between them is `6`. The capacity of the condenser will be

A

240 pF

B

240 `muF`

C

240 F

D

none of the above

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The correct Answer is:
A
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