The Establishment of Electromagnetic Induction Law and Faraday's Change in Thought

Based on the analysis and study of Faraday's Diary and his published articles,this paper elucidates the establishment process of Faraday's Electromagnetic Induction Law and his change in thought during this period.This paper points out: Faraday had foreseen the instantaneity of the induced current before his discovery of electromagnetic induction;the date affixed to Faraday's article was earlier than the exact time,so people should not judge the formation time of Faraday's discoveries and theories according to the signature date in the article;Faraday had a change in thought from electrotonic state to of magnetic during his research on electromagnetic induction,the thought of lines of force was founded and established.