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Find the minimum surface denstily of cha...

Find the minimum surface denstily of charge on the plate, so that a body of mass 2 `kg//m^(2)` may just be lifted.

A

`2.84xx10^(-9)C//m^(2)`

B

`2.25xx10^(-9)C//m^(2)`

C

`1.86xx10^(-9)C//m^(2)`

D

None of these

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