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

这等于通随时间变化乘以自由空间常数介常数。

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

这就是为什么完容方程包括介常数 K。因此介可以帮助容器保持更多能。

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.

您可以使用我们能密度方程，并用场和介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，场自由空间介常数 epsilon 为零，磁场自由空间介常数 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，但自由空间介常数是我们之前使用相对论常数，它将荷与场物理效应联系起来。

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.

在数学上，这个方程表明通是表面积上场一个组部分，它等于闭合荷除以自由空间介常数。