Question

The diagram shows a circular loop of wire that rotates at a steady rate about a diameter O that is perpendicular to a uniform magnetic field. The maximum induced emf occurs when the point X on the loop passes:

a.A
b.B
c.C
d.D
e.E

Answer 1

The maximum induced emf occurs when the point X on the loop passes through position B.

Step-by-step explanation:

The maximum induced emf occurs when the point X on the loop passes through position B.

According to Faraday's law, when a circular loop of wire rotates at a steady rate about a diameter perpendicular to a uniform magnetic field, the maximum induced emf occurs when the angle between the magnetic field and the vector perpendicular to the area of the loop is 90 degrees. This is shown in Figure 20.35, where the magnetic field lines intersect the plane defined by the loop at point B.

Therefore, the correct answer is option B.