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电磁感应是历年来各地高考的重点和热点,题型较多,覆盖面广且有极强的综合性.考查内容从感应电流的产生条件、感应电流的方向判断、感应电动势的计算等基础知识,到物理图象的应用,力、电综合问题的处理等综合性问题.涉及恒定电流、牛顿运动定律、能量的转化和守恒等知识的应用等,且多以中等难度以上题目来增加试题的区分度,而选择和填空题多以中等难度左右的试题出现,占整份试卷分值的六分之一左右,对考生的能力要求较高.这类综合题题目长、难度大、涉及知识点多、计算量大、综合性强,处理起来比较棘手,因此在二轮复习时一定要对本专题有所侧重,力争突破.
Electromagnetic induction is the focus and hot spot of college entrance examination all over the country over the years, more questions, covering a wide range and has a very strong comprehensive test content from the induction current generation conditions, induction current direction judgment, induction electromotive force calculation basic knowledge, To the application of physical images, the comprehensive treatment of electric and electrical problems and other comprehensive issues. Involved constant current, Newton’s law of motion, energy conversion and conservation of knowledge such as the application, and more questions with intermediate difficulty more questions to increase the distinction Degree, and choice and fill in the blank questions more than moderate difficulty questions appear, accounting for about one-sixth of the entire score of the examination papers, the ability of the candidates higher. Such comprehensive titles, difficult, involving knowledge More calculation, large comprehensive, more difficult to deal with, so in the second round of review must focus on the topic, and strive to break through.