Question

A flat surface of area 1.25 m2 is rotated through a uniform horizontal electric field of 5 N/C. What is the electric flux if the surface is (a) parallel and (b) perpendicular to the electric field?

Answer 1

$\Phi_E=ES\cos\gamma,$

a)

$\Phi_E=ES=5~Vm,$

b)

$\Phi_E=0.$