Physical Sience and Technical Research

According to the electric potential formula and superposition principle of infinite uniformly charged line, the electric potential formula on the vertical line of infinite uniformly charged thin plate is deduced, and the electric field strength formula is deduced by using the relationship between electric field and electric potential. The electric potential and electric field strength on the midperpendicular of infinitely long parallel thin plate with uniform positive and negative charges are studied. It is found that the electric field strength of the center is the smallest, while that of the inner edge is the largest, and the electric field between the two plates is not uniform. By introducing the concept of uniformity coefficient, it can be found that the uniform electric field is actually the field with the uniformity coefficient no more than a certain value.

Infinite thin plate; Uniformly charged; Electric field strength; Uniformity coefficient; MATLAB.