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论述题作为物理学科的一种新题型，对大多数教师和考生来说是比较新鲜而又陌生的，如何应答，答题中注意什么问题，必须引起足够的重视．下面提供几道论述题，全部来自中学教材，供大家参考．１．说明为什么：（１）电场线一定跟等势面垂直；（２）电场线总是由电势较高的...
The essay question as a new question type of the physics subject is relatively new and unfamiliar to most teachers and candidates. How to answer and what questions to pay attention to in the answer must be given enough attention. The following provides a few essay questions, all from high school textbooks, for your reference. 1. Explain why: (1) The electric field lines must be perpendicular to the equipotential surface; (2) The electric field lines are always higher in potential...