Question

A flat sheet is in shape of a rectangle with sides of length 0.400m and 0.600m. The sheet is immersed in a uniform electric field of magnitude 75.0n/c that is directed at 20°.from the plane sheet calculate the magnitude of the electric flux through the sheet

Answer 1

 the magnitude of the electric flux through the sheet

$$\Phi=abE\cos(90^\circ-20^\circ)=0.4\cdot0.6\cdot75\cdot0.34$$

$$= 6.12 (Vm).$$