A square frame of edge 10 cm is placed with its positive normal making on angle of `60^0` with a uniform electric field of `20 V m^(-1)`. Find the flux of the electric field through the surface bounded by the frame.

Explanation

The surface considered is plane and the electric field is uniform (figure 30.). Hence, the flux is gtbrgt`DeltaPhi=vecE.DeltavecS`
`= E DeltaS cos 60^0`
`+(20 V m^(-1)) (0.01 m^2)(1/2)= 0.1 Vm`.