第九章第2课时

1、第九章 电磁感应,物理 人教版,第2课时法拉第电磁感应定律、自感和涡流,AD,题组扣点深度思考,图1,CD,题组扣点深度思考,D,题组扣点深度思考,图3,B,题组扣点深度思考,题组扣点深度思考,电磁感应现象,电源,电源内阻,闭合电路欧姆,磁通量的变化率,题组扣点深度思考,电流,自感电动势,题组扣点深度思考,大小,匝数,感应电流,安培力,阻碍,感应电流,楞次定律,A,题组扣点深度思考,图4,题组扣点深度思考,图5,B,题组扣点深度思考,1 “极端法”分析电磁感应问题,将题中某些物理量推到极限状态或极值条件下分析研究，会使问题变得容易解决,2感应电荷量的求法：,课堂探究考点突破,考点一法拉第电磁感

2、应定律的应用,课堂探究考点突破,课堂探究考点突破,课堂探究考点突破,课堂探究考点突破,1.应用法拉第电磁感应定律解题的一般步骤,2几点注意,课堂探究考点突破,课堂探究考点突破,课堂探究考点突破,考点二导体切割磁感线产生感应电动势的计算,课堂探究考点突破,图8,课堂探究考点突破,图9,课堂探究考点突破,课堂探究考点突破,课堂探究考点突破,课堂探究考点突破,课堂探究考点突破,图10,课堂探究考点突破,课堂探究考点突破,考点三自感现象的分析,课堂探究考点突破,图11,课堂探究考点突破,课堂探究考点突破,课堂探究考点突破,图12,课堂探究考点突破,学科素养培养,44应用法拉第电磁感应定律答题的规范,1

3、文字说明,学科素养培养,2必要方程,学科素养培养,3数字运用,4答题模板,学科素养培养,立体图转化为截面图 受力分析是关键,立体图转化为截面图，进行受力分析，其受重力、弹力、安培阻力和滑动摩擦力,“稳定速度”即为匀速运动，受合力为零，第(1)问即可应用受力平衡求解,求焦耳热涉及能量问题，应考虑运用功能关系分析；此过程重力做正功，摩擦力和安培力做负功，可应用动能定理分析,回路不产生感应电流的条件是磁通量不变，当回路无感应电流时受力将发生变化，不再受安培力,学科素养培养,学科素养培养,高考题组,1,2,模拟题组,3,4,6,5,高考模拟提能训练,高考模拟提能训练,高考题组,1,2,模拟题组,3,4

4、,6,5,高考模拟提能训练,高考题组,1,2,模拟题组,3,4,6,5,高考模拟提能训练,高考题组,1,2,模拟题组,3,4,6,5,高考模拟提能训练,高考题组,1,2,模拟题组,3,4,6,5,高考模拟提能训练,高考题组,1,2,模拟题组,3,4,6,5,高考模拟提能训练,高考题组,1,2,模拟题组,3,4,6,5,高考模拟提能训练,高考题组,1,2,模拟题组,3,4,6,5,C,高考模拟提能训练,高考题组,1,2,模拟题组,3,4,6,5,BC,高考模拟提能训练,高考题组,1,2,模拟题组,3,4,6,5,AD,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,练出高分

5、,1,2,3,4,5,6,7,8,9,10,11,12,13,答案 B,练出高分,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,1,2,3,4,5,6,7,

6、8,9,10,11,12,13,练出高分,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,图6,1,2,3,4,5,6,7,8,9,10,11,12,13,答案 D,练出高分,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,1,2,3,4,5,6,7,8,9,10,11,12,13,图7,练出高分,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,图8,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,1,2,3,4,5,6,7,8,9,10,11,12,13,练出高分,1,2,3