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法拉第电磁感应定律是高中物理电磁学部分的重要内容,它揭示了感应电动势E_感与闭合线圈内磁通量的变化率△Φ/△t、线圈匝数n所成的正比关系:E_感=n△Φ/△t。利用转换法,将E_感与△Φ/△t之间的关系转化为E_感与交变电流频率之间的关系。本文依此设计实验来定量验证感应电动势E_感与闭合线圈内磁通量的变化率△Φ/△t、线圈匝数n所成的正比关系。
Faraday’s Law of Electromagnetic Induction is an important part of high school physics electromagnetics. It reveals the proportional relation between the induced electromotive force (E_) and the rate of change of the magnetic flux in the closed coil (△ Φ / △ t) and the number of turns of the coil (n) n △ Φ / △ t. Using the conversion method, the relationship between E_sense and ΔΦ / Δt is transformed into the relationship between E_sense and alternating current frequency. In this paper, the experiment is designed to quantitatively verify the direct relation between the induced electromotive force (E_) and the rate of change of the magnetic flux in the closed coil (△ Φ / △ t) and the number of turns of the coil (n).