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一、教学目的和要求 1.能认识电流周围存在磁场,并掌握直线电流和通电螺线管周围磁力线的分布情况。 2.能正确运用安培定则判断直线电流周围磁力线的方向和通电螺线管的磁极。 二、教学重点和难点 重点:对电流磁场的认识,直线电流周围的磁力线,通电螺线管周围的磁力线分布情况,磁力线方向(磁场方向)的确定。 难点:安培定则的熟练掌握并运用定则解决一些具体问题,学生空间想象能力及识图能力的提高。
First, the purpose and requirements of teaching 1. Can recognize the existence of magnetic fields around the current, and to grasp the linear current and distribution of magnetic field around the solenoid. 2. It is possible to correctly use the ampere determination to determine the direction of the magnetic flux around the linear current and the magnetic pole of the energized solenoid. Second, the focus and difficulty of teaching Key points: the understanding of the current magnetic field, magnetic field lines around the linear current, distribution of magnetic lines around the power solenoid, magnetic field direction (magnetic field direction) to determine. Difficulties: Mastery of the Able to master and use the rules to solve some specific problems, students’ spatial imagination ability and the improvement of the ability to identify pictures.