A wire is moved downward at right angles to the magnetic field. Three possible changes are listed below. 1 The speed of the movement of the wire is increased. 2 The magnetic field strength is decreased. 3 The direction of the magnetic field is reversed. Which of these changes increase the electromotive force (e.m.f.) induced in the wire?
- A1 and 3
- B1 only
- C2 and 3
- D3 only