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A square of side 20 cm is enclosed ...

A square of side 20 cm is enclosed within a sphere of radius 80 cm . Centres of the sphere and the square coincide at a common point . There are four charges of `2xx10 ^(-6 ) C. -5xx 10 ^(-6 ) , C .-3xx 10 ^(-6 ) C and 6xx10 ^(-6) C ` at the four corners of the square . the electric flux passing through the surface of the sphere in `N .m ^(2) //C.`

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