The electric flux through the surface shown in Figure Ex27.10 is 15.0 Nm2/C, and the electric field makes an angle á = 70° with the surface. What is the electric field strength? The surface is a 10cm by 10cm square.

Answer 1

E.dA is flux
E*Area*cos20=flux

check the angle. Angles are measured to the normal.

Answer 2

120 N/C

Answer 3

Flux = E*A
E = Flux/A
E = Flux/(0.1^2*cos(20))
= 1596.2667 N/c