Two balls with equal charge are in a ves...

Two balls with equal charge are in a vessel with ice at - `10 ^@C` at a distance of 25 cm from each other. On forming water at `0^@C` , the balls are brought nearer to 5 cm for the interaction between them to be same. If the dielectric constant of water at `0^@C ` is 80 , the dielectric constant of ice at `-10^@C` is

A

40

B

`3.2`

C

20

D

`6.4`

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The correct Answer is:

B

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