A magnetic field of 4.5 T is applied perpendicular to a circular coil with a radius of 8 cm. Calculate the magnetic flux through the coil. 

A rectangular loop of dimensions 0.25 m x 0.35 m is placed in a magnetic field of 0.6 T. If the angle between the magnetic field and the normal to the loop is 30°, what is the magnetic flux through the loop?

A magnetic field of 0.9 T makes an angle of 45° with the normal to a square loop of side length 0.2 m. Determine the magnetic flux through the loop.