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

这等于通量随时间的变化乘以自由空间的介。

And that’s why the full equation for capacitance includes a dielectric constant, K. So dielectrics can help capacitors hold even more energy.

这就是为什么完整的方程包括介 K。此介可以帮助器保持更多的能量。

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.

您可以使用我们的能量密度方程，并用场和介的平方根时间替换磁场的大小 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的方程，场的自由空间介 epsilon 为零，磁场的自由空间介 mu。

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.

如果你不提我不会怪你，但自由空间介是我们之前使用的相对论，它将荷与场的物理效应联系起来。

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.

在学上，这个方程表明通量是表面积上场的一个组成部分，它等于闭合荷除以自由空间的介。