College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 52

Find the flux of Earth's magnetic field of magnitude 5.00 × 10 5 T through a square loop of area 20.0 cm 2 (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, and (c) when the field makes a 90.0° angle with the normal to the plane.