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在静电场中,场强E和电势φ是反映场强具有力的性质和能的性质的物理量,两者并没有直接的关系:场强相同,电势不一定相同,场强为零,电势不一定为零,反之一样。但场强与电势差有关系,另外,沿电场线方向电势逐渐降低。电场中各点的电势和场强不同,是随离电点荷的位置而发生变化,怎样定性画出“电势φ、场强E”
In the electrostatic field, the field strength E and the potential φ are physical quantities that reflect the force properties and energy properties of the field. There is no direct relationship between the two: the same field strength, the same potential, zero field strength, Must be zero, and vice versa. However, the field strength is related to the potential difference. In addition, the potential along the electric field line gradually decreases. The electric field in each point of the potential and field strength is different with the charge point of the location of the change, how to draw a qualitative “potential φ, field strength E ”