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近年高考试题中出现一种判断型选择题,其中物理知识大有超纲嫌疑,涉及竞赛内容甚至于大学物理知识,虽然可用极限法、量纲等方法进行排查,但是这样对教与学的意义都不大。本文拟以一道电场题为例,尝试在平时高中物理电场教学中适度拓展,渗透梯度思想,期待学生的知识与能力超越发展。
In recent years, college entrance examination exam questions appear a multiple choice question, in which the general knowledge of physical overstamination suspect, involving the contents of the competition or even physical knowledge of the university, although available limit method, dimension and other methods to investigate, but so the significance of teaching and learning Not large. This article intends to take an electric field problem as an example, trying to moderately expand and infiltrate the idea of gradient in the normal high school physics electric field teaching, expecting the students’ knowledge and ability to surpass the development.