A capacitorn of 2 muF charged to 50 V is...

A capacitorn of `2 muF` charged to 50 V is connected in parallel with another capacitor of `1 muF` charged to 20 V. The common potential and loss of energy will be

`40 V,300 mu J`

`50 V,400 mu J`

`40 V, 600 mu J`

`50 V, 700 mu J`

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