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欧姆定律是初中电学的重要内容,也是求解电学问题常用的重要规律.有关欧姆定律的计算问题是初中电学的难点之一,不少同学往往难以掌握.同学们首先应准确理解欧姆定律的内容,知道定律中的电流、电压、电阻是对同一段导体或同一电路,其次要深刻领会并掌握串、并联电路的特点、规律.下面结合实例介绍求解欧姆定律问题的一般方法,供同学们参考.
Ohm’s law is an important content of junior middle school electricity, and it is also an important regular law for solving electrical problems. The calculation problem of Ohm’s law is one of the difficulties of junior middle school electricity. Many students are often difficult to master. The students should first understand the content of Ohm’s law accurately. Know that the current, voltage, and resistance in the law are for the same segment of the conductor or the same circuit, followed by a deep understanding of the characteristics and rules of the string and parallel circuits. The following is an example of the general method to solve the problem of Ohm’s law for students to refer to.