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The ratio of energy density in electrif ...

The ratio of energy density in electrif field `(u_(E))` to square of potential `(V^(2))` at a point A at a distnance x from a static point charge Q is `eta`
(a). Write the value of the ratio at a distance 2x from the point charge Q.
(b). Write the dimensional formula for the ratio `eta`

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