Hello,
E = 5i + 2j N/C (Given)
Area of square = 2 m^2 (Given)
Using Gauss's Law, we have, Electric flux = Electric field * Area
Flux = E * A = E * A * cos theta
Flux = (5i + 2j) * 2 * cos 0 [In y-z plane, theta will be 0]
Flux = 10 Weber (Answer)
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