A sphere S₁ of radius r₁ enclosing a charge Q₁ is surrounded by another concentric sphere S₂ of radius r₂ (r₂ > r₁). If there is a charge −Q₂ in the space between S₁ and S₂, find the ratio of electric flux through S₁ and S₂.

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TextGauss's Theorem for Electric FieldCBSE PYQ

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A cube of side 0·1 m is placed, as shown in the figure, in a region where electric field E = 500 x î exists. Here x is in meters and E in NC⁻¹. Calculate : (a) the flux passing through the cube, and (b) the charge within the cube.

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