The electric potential in a medium of dielectric constant unity is ∅(x,y,z) = a๐‘ฅ^2 where ‘a’ is a constant of suitable dimensions . The total charge contained in a cube of dimensions −๐ฟ≤x,y,z≤ +๐ฟ is Zero -2a๐œ€_๐‘œ ๐ฟ^3 -16a๐œ€_๐‘œ ๐ฟ^3 -4a๐œ€_๐‘œ ๐ฟ^3

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