Chapter 27 Electromagnetic Induction and faraday's law New words and Expressions magnetic flux 磁通量 electromotive force(emf) 电动势 electromagnetic induction 电磁感应 induced current 感应电流 induced emf 感应电动势 motional emf 动生电动势 galvanometer 检流计,电流计Chapter 27 Electromagnetic Induction and Faraday’s Law New words and Expressions magnetic flux 磁通量 electromotive force (emf) 电动势 electromagnetic induction 电磁感应 induced current 感应电流 induced emf 感应电动势 motional emf 动生电动势 galvanometer 检流计,电流计