欧姆定律是初中物理电学部分的一个重要定律,是德国物理学家欧姆在19世纪初期经过大量的实验研究得出来的。欧姆定律阐述了导体中的电流跟加在导体两端的电压和导体的电阻之间的关系,从数量上反映了电流、电压、电阻三个不同物理量之间的联系。初中物理教学中如果能从欧姆定律中理解电阻的两个本领,对学生利用欧姆定律解决相关问题将有很大的帮助。 Ohm’s law is an important law of the physics of the junior middle school physics. It was derived from a large number of experimental studies by the German physicist Ohm in the early 19th century. Ohm’s law expounds the relationship between the current in a conductor and the voltage applied across the conductor and the resistance of the conductor, which quantitatively reflects the connection between three different physical quantities of current, voltage and resistance. If you can understand the resistance of Ohm’s law two skills in junior high school physics teaching, the students use Ohm’s law to solve the related problems will be of great help.