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A point charges +10 mu C is a distance...

A point charges `+10 mu C ` is a distance 5 cm directly above centre of a square of side 10 cm as shown in What is the magnitude of the electric flux through the square?

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To find the electric flux consider an imaginary cube of side 10 cm such that the charges of `+10 muC ` is located at the centre of cube. Now in accordance with Gauss theorem, total electric flux over the entire
` phi_E =(q)/(in_0) =(10xx10 ^(-6))/(8.85xx10^(-12)) =1.13 xx 10^(5) N m^(2) C^(-1) `
As charges is situated at the centre of teh cube having six surface in all and the given square is one of these six, hence electric flux through the given square
` =(1)/(6) phi_in =(1.13xx10^(6))/(6) =1.9 xx10 ^(5) Nm^(2) C^(-1) `
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