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例1 在静电场中: (A)场强处处为零的区域内,电势一定处处相等(B)场强处处相同的区域内电势也一定处处相等(C)电势降低的方向一定是场强方向(D)同一电场中等势面分布越密的地方,场强一定越大解析:在电场中取很小区域,可视为匀强电
Example 1 In the electrostatic field: (A) In the area where the field strength is zero everywhere, the potential must be equal everywhere (B) The field strength must be equal everywhere in the same area (C) The direction of potential reduction must be the direction of the field strength (D) Where the density distribution of the medium electric potential surface in the same electric field is denser, the field strength must be larger. Analysis: Take a small area in the electric field and treat it as a uniform electric field.