A square is centred at origin having sid...

A square is centred at origin having sides parallel to x-axis and y-axis . It has surface charge density `sigma(x,y)=sigma_0` within its boundaries. The measure of charge of each side 2a of square is Q. what is the total charge on the square?

`4sigma_0Q^2`

`2sigma_0a^3`

`sigma_0a^2`

zero

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