The inward and outward electric flux for...

The inward and outward electric flux for a closed surface unit of `N-m^(2)//C` are respectively `8xx10^(3)` and `4xx10^(3)`. Then the total charge inside the surface is [where `epsilon_(0)=` permittivity constant]

`4xx10^(3)C`

`-4xx10^(3)C`

`-4xx10^(-3)C`

`-4xx10^(3)epsilon_(0)C`

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