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Chapter 24

Electric Potential

电势能
电势能
When an electric field accelerates a free positive charge q, it is given kinetic energy. The process is analogous to an object accelerated by a ...
均匀电场中的电势能
均匀电场中的电势能
When an electric field accelerates a free positive charge, it acquires kinetic energy. This process is analogous to an object being accelerated by a ...
两点电荷的势能
两点电荷的势能
The electric potential energy of a test charge in a uniform eclectic field can be generalized to any electric field produced by static charge ...
电位和电位差
电位和电位差
Suppose a positive test charge moves away from a positive static charge, then the Coulomb force does positive work, and its electric potential energy ...
从电场中寻找电势
从电场中寻找电势
For a system of charges, it is easy to calculate the system's potential because potential is a scalar quantity. However, in some instances where ...
电势 I 的计算
电势 I 的计算
Consider a ring of radius R with a uniform charge density λ. What will the electric potential be at point M, which is located on the axis of the ring ...
电势计算 II
电势计算 II
An electric dipole is a system of two equal but opposite charges, separated by a fixed distance. This system is used to model many real-world systems, ...
等势面和磁力线
等势面和磁力线
Electric potential can be pictorially represented as a three-dimensional surface. On such a surface, the electric potential is constant everywhere. The ...
等电位表面和导体
等电位表面和导体
For a conductor in which all charges are at rest, the conductor's surface is equipotential. The electric field is always perpendicular to ...
根据电势确定电场
根据电势确定电场
The electric field and electric potential are related to each other. If the electric field at various points in the region of interest is known, it can be ...
泊松和拉普拉斯方程
泊松和拉普拉斯方程
The electric potential of the system can be calculated by relating it to the electric charge densities that give rise to the electric potential. The ...
Van de Graaff 生成器
Van de Graaff 生成器
Van de Graaff generators (or Van de Graaffs) are devices used to demonstrate high voltage due to static electricity that can also be used for research. ...
与电荷分布相关的能量
与电荷分布相关的能量
The work done to bring a charge through a distance r is given by the potential difference between the initial and the final position. To assemble a ...
静电边界条件
静电边界条件
Consider an external electric field propagating through a homogeneous medium. When the electric field crosses the surface boundary of the medium, it ...
第二唯一性定理
第二唯一性定理
Consider a region consisting of several individual conductors with a definite charge density in the region between these conductors. The second uniqueness ...
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