A disk with radius 0.5 m is oriented with its normal unit vector n at an angle of 30° to a uniform electric field E with magnitude 2.0 × 103 N/C.
a) What is the flux through the disk?
b) What is the flux through the disk if it is turned so that its normal is perpendicular to E?
c) What is the flux through the disk if it is normal is parallel to E?