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热点九、电场的性质【命题分析】电场的性质包括力的性质和能的性质.对力的性质的考查多以电场强度的大小和方向的判断、电场力的计算、库仑定律的应用等形式出现;电场能的性质包括电势、电势差、电势能等知识,多考查定性判断;对电势的考查常伴随着电场线、等势面等知识;对电势差和电势能的考查一般与电场力做功知识相结合.本热点一般以选择题的形式考查,难度中等或中等偏下.【真题展示】图1
Hot nine, the nature of the electric field Proposition analysis The nature of the electric field, including the nature of the force and energy properties of the nature of the test more than the strength and direction of the electric field to determine the strength of the calculation of electric field, the application of Coulomb’s law and other forms Appear; the nature of the electric field energy, including potential, potential difference, potential energy and other knowledge, multi-test qualitative judgment; the potential of the test is often accompanied by the electric field lines, such as equipotential surface knowledge; potential difference and potential energy of the general and electric field work knowledge Combination of the hot spot in the form of multiple-choice questions in the general examination, the difficulty of medium or lower middle level.