Question Detail
Question
A coil of wire with N turns and area A is placed into a magnetic field of magnitude B. The angle of the normal to the plane of the coil is at an angle phi with respect to the magnetic field. According to Faraday's law, which of the following changes will produce an emf in the coil?
Correct Answer
Option D is the correct answer.
Detailed Explanation
Phi=BAcos(phi); changing any of B, A, phi changes flux and induces an emf.
Hint
Phi=BAcos(phi); changing any of B, A, phi changes flux and induces an emf.