Question

What is the electric field e is 3*10^3 n/c through a square of side 10 cm,when it is held normal to e?

Answer 1

I think u wanna ask for electric flux.

Consider a cubical gaussian surface and calculate flux through it and then divide it with 6 for flux through square . As field is 90 degree with the surface of square but area vector will be perpendicular outward and angle b/w field and area vector will be zero. so,flux=3×10^3×0.1×0.1/6

flux=5Nm2/C