Find the flux of Earth's magnetic field of magnitude 5.00 10-5 T through a square loop of area 40.0 cm2 for the following:
(a) when the field is perpendicular to the plane of the loop
(b) when the field makes a 30.0° angle with the normal to the plane of the loop
(c) when the field makes a 90.0° angle with the normal to the plane