Two parallel plate capacitors X and Y, h...

Two parallel plate capacitors X and Y, have the same area of plates and same separation between plates. X has air and Y with dielectric of constant 2 , between its plates. They are connected in series to a battery of 12 V. The ratio of electrostatic energy stored in X and Y is-

`4:1`

`1:4`

`2:1`

`1:2`

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