A flat coil is in a uniform magnetic field. The magnetic flux through the coil is greatest when the plane of its area is
A) at 45° with the magnetic field.
B) parallel to the magnetic field.
C) perpendicular to the magnetic field.

Question

Quizplus · Accepted Answer

The magnetic flux through a coil is greatest when the plane of the coil is perpendicular to the magnetic field, as flux is given by the product of the magnetic field strength, the area of the coil, and the cosine of the angle between the field and the normal to the plane of the coil. When the angle is 0 degrees (perpendicular), the cosine of the angle is 1, maximizing the flux.

A Flat Coil Is in a Uniform Magnetic Field