Given a uniform electric field vector E = 5 x 10^3 cap i N/C, find the flux of this field through a square of side 10 cm

Question

Given a uniform electric field  = 5 x 10³ cap i N/C, find the flux of this field through a square of side 10 cm on a side whose plane is parallel to the y-z plane. What would be the flux through the same square if the plane makes a 30° angle with the x-axis ?

Answer 1

= 25 NC^-1 m²