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在Visual C++开发环境下,通过龙格库塔方法求解非线性电路微分方程组,得到数值解并模拟显示李萨茹图形。在相同线路参数下模拟结果与实验室实验中观察到的结果一致,同时模拟显示可以容易地得到稳定的X,Y方向上的输出波形。通过该模拟实验可以很好地观察研究非线性电路中的混沌现象。 相似文献
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电场线和等势线是研究电学问题的重要工具,在高中水平上利用物体运动的模拟和计算机绘制点电荷的电场线和等势线,为进一步探究电场和电势的特点提供素材。 相似文献
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静电场描绘是理工科院校普遍开设的物理实验题目,通常用恒定电流场来模拟静电场的电势分布,再由描绘出的等势线族根据它们和电场线(电力线)正交的特点徒手画出相应的电场线分布来。这样画出的电场线误差较大,很难给出电场线及电极表面电荷密度分布的准确物理图象.为解决这一同题, 相似文献
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静电场的复势函数与模拟法描绘电场线的原理上海交通大学乔卫平,陈新雷静电场描绘是理工科院校普遍开设的物理实验题目,通常用恒定电流场来模拟静电场的电势分布,再由描绘出的等势线族根据它们和电场线(电力线)正交的特点徒手画出相应的电场线分布来”‘二这样画出的... 相似文献
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S. G. Arutyunyan 《Radiophysics and Quantum Electronics》1992,35(3-4):209-215
It is shown that the electrodynamics of orthogonal magnetic and electric fields can be represented as the dynamics of covariant lines of force. Such a representation is provided for the Lienard-Wichert field of an arbitrary moving charge and the field of a charge that moves uniformly about a circle. The four vector of the electric lines of force is written as the sum of the four vector of the charge and the radius four vector directed along the light cone to the observation point. This vector is a solution of an equation that formally coincides with the equation of motion of the magnetic moment in external fields for a zero intrinsic magnetic moment. The electromagnetic field is reconstructed according to a system of lines that correspond to the total equation of motion of the magnetic moment. Such a field for a uniformly circulating charge is examined.Erevan Physics Institute. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 35, Nos. 3, 4, pp. 313–323, March–April, 1992. 相似文献
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Amos Harpaz 《Foundations of Physics》2007,37(4-5):763-772
The potential of a static electric charge located in a Schwarzschild gravitational field is given by Linet. The expressions
for the field lines derived from this potential are calculated by numerical integration and drawn for different locations
of the static charge in the gravitational field. The field lines calculated for a charge located very close to the central
mass can be compared to those calculated by Hanni–Ruffini. Maxwell equations are used to analyze the dynamics of the falling
electric field in a gravitational field. 相似文献
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It is shown that permanent confinement in three-dimensional compact U(1) gauge theory can be destroyed by matter fields in a deconfinement transition. This follows from a nontrivial infrared fixed point caused by matter, and an anomalous scaling dimension of the gauge field. This leads to a logarithmic interaction between the defects of the gauge fields, which form a gas of magnetic monopoles. For logarithmic interactions, the original electric charges are unconfined. The confined phase, which is permanent in the absence of matter fields, is reached at a critical electric charge, where the interaction between magnetic charges is screened by a pair-unbinding in a Kosterlitz-Thouless-like phase transition. 相似文献
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Several features of electrostatics of point charged particles in a weak, homogeneous, gravitational field are discussed using
the Rindler metric to model the gravitational field. Some previously known results are obtained by simpler and more transparent
procedures and are interpreted in an intuitive manner. Specifically: (a) We discuss possible definitions of the electric field
in curved spacetime (and noninertial frames), argue in favour of a specific definition for the electric field and discuss
its properties. (b) We show that the electrostatic potential of a charge at rest in the Rindler frame (which is known and
is usually expressed as a complicated function of the coordinates) is expressible as A
0 = q/λ where λ is the affine parameter distance along the null geodesic from the charge to the field point. (c) This relates well with the
result that the electric field lines of a charge coincide with the null geodesics; that is, both light and the electric field
lines ‘bend’ in the same manner in a weak gravitational field. We provide a simple proof for this result as well as for the
fact that the null geodesics (and field lines) are circles in space. (d) We obtain the sum of the electrostatic forces exerted
by one charge on another in the Rindler frame and discuss its interpretation. In particular, we compare the results in the
Rindler frame and in the inertial frame and discuss their consistency. (e) We show how a purely electrostatic term in the
Rindler frame appears as a radiation term in the inertial frame. (In part, this arises because charges at rest in a weak gravitational
field possess additional weight due to their electrostatic energy. This weight is proportional to the acceleration and falls
inversely with distance—which are the usual characteristics of a radiation field.) (f) We also interpret the origin of the
radiation reaction term by extending our approach to include a slowly varying acceleration. Many of these results might have
possible extensions for the case of electrostatics in an arbitrary static geometry. 相似文献
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In electrostatic applications, particles are typically stacked in an arbitrary array. In this paper, multiple particle agglomerations with a finite volume conductivity, surface conductivity and permittivity have been simulated. Upon exposure to the electric field, electric shielding can occur due to the proximity of other particles, which greatly reduces the maximum accumulated charge and affects the charging time. All results have been obtained using the COMSOL commercial software. The simulation results show that shielding the electric field from a given particle reduces its saturation charge and the rate of charge accumulation was mainly affected by the volume and surface conductivities. 相似文献
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利用复数坐标系z上的施瓦茨-克利斯多菲变换和镜像法,计算由接地导体限定的无限深槽内线电荷电场中的电势分布和场强分布,给出电场线与等势线方程,并利用数学软件Matlab绘制出其电势分布三维图、电场线和等势线(面)图. 相似文献
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用计算机模拟点电荷在二维平面上的静电场 总被引:5,自引:1,他引:4
二维平面上的点电荷的静电场是静电场问题的基础,作者独立开发了软件用以模拟,此程序由用户决定点电荷的所有参数,快速地生成视阈内的等势线与电场线,使用户方便的获得电场直观印象,并可以得到任意点的电势与场强,该程序操作简单,对于学生、教师的学与教都能起到很好的辅助作用。 相似文献