A circular loop of wire is rotated at constant angular speed about its symmetry axis, whose direction can be varied, in a uniform magnetic field pointing vertically upward. To get no induced emf, the loop's axis of rotation should A) make an angle of 30^o with the vertical. B) make an angle of 45^o with the vertical. C) make an angle of 60^o with the vertical. D) be vertical. E) be horizontal.

Question

Quizplus · Accepted Answer

When the axis of rotation of the loop is vertical, it aligns with the direction of the magnetic field. This means the magnetic flux through the loop remains constant as it rotates, resulting in no induced emf according to Faraday's law of electromagnetic induction.

A Circular Loop of Wire Is Rotated at Constant Angular