A student pushes a magnet into a coil, as illustrated. The voltmeter records the size of the electromotive force (e.m.f.) induced in the coil. Which quantity does not influence the size of the induced e.m.f.?
- Athe number of turns per unit length in the coil
- Bthe polarity of the magnet
- Cthe speed of the magnet
- Dthe strength of the magnet