And that  all still equals the charge inside the Gaussian surface divided by the permittivity of free space.

而这一切仍然等高斯表面内电荷除以自由空间介电常数。

We also know the Coulomb constant equals the  inverse of the quantity four pi times the permittivity of free space.

们还知道库仑常数等四圆周率乘以自由空间介电常数倒数。

And that is equal to the change in electric flux over time, multiplied by the permittivity of free space constant.

这等电通随时间变化乘以自由空间常数介电常数。

You can take our energy density equation and substitute the magnetic field magnitude, B, with the electric field, times the square root of the permittivity constants.

您可以使用们密度方程，并用电场和介电常数平方根时间替换磁场大小 B。

This equation simplifies down to an equation with two constants, the permittivity of free space for electric fields, epsilon naught, and the permittivity of free space for magnetic fields, mu naught.

该方程简化了具有两个常数方程，电场自由空间介电常数 epsilon 为零，磁场自由空间介电常数 mu。

The electric flux which passes through a sphere which is  concentric to a positive point charge equals the charge of the positive point charge  divided by the permittivity of free space.

穿过与正点电荷同心球体电通等正点电荷电荷除以自由空间介电常数。

I won't blame you if you don't remember, but the permittivity of free space is a constant of proportionally we've used before, that relates electric charge to the physical effect of electric fields.

如果你不提不会怪你，但自由空间介电常数是们之前使用相对论常数，它将电荷与电场物效应联系起来。

Mathematically, this equation says that electric flux is the integral of the electric field over the area of the surface, which is equal to the enclosed charge, divided by the permittivity of free space.

在数上，这个方程表明电通是表面积上电场一个组成部分，它等闭合电荷除以自由空间介电常数。

And we get that the magnitude of the electric  field which surrounds and is caused by an infinitely large, thin plane of charges  equals surface charge density divided by the quantity two times permittivity of free space.

们发现，由无限大而薄电荷平面包围并引起电场强度等表面电荷密度除以自由空间介电常数两倍。

One way to express capacitance is to divide the area of each plate by the distance between them, and multiply that by a constant – known as the permittivity of free space – denoted by epsilon naught.

表示电容一种方法是将每个极板面积除以它们之间距离， 这乘以一个常数，称为可用空间容差，由 epsilon 注释推断。