An ideal solenoid is a very common tool for creating a uniform magnetic field.

理想的螺线管是创建均匀磁场的非常常见的工具。

So, we’ve found the potential energy decrease of a single point charge in a uniform electric field.

因此，我们发现了均匀电场中单点电荷的势能降低。

So, we've found the potential energy decrease of a single point charge in a uniform electric field.

所以我们发现电荷的势能降低了 均匀电场中的一个点。

Generators use a wire wound around something called an armature – basically, a cylinder that rotates within a uniform magnetic field.

发电机使用绕在称为电枢的东西上的电线 - 基本上，一个在均匀磁场中旋转的圆柱体。

But since there’s no uniform field, like there would be with a capacitor, we can’t use all of the equations that we’ve been using so far.

但是由于没有均匀场， 就像电容器一样， 我们不能使用到目前为止我们一直使用的所有方程式。

When we place the positive charge between the plates, the uniform electric field generates a constant force on it, in the direction of the negative plate.

当放置在两个板之间时，会产生电场 均匀是朝向负极板的恒定力。

But since there's no uniform field, like there would be with a capacitor, we can't use all of the equations that we've been using so far.

由于没有电场规则场 冷凝器，我们不能使用相同的方程式。

Now, since a capacitor creates a uniform electric field, we can assume the electric force is constant, and that it acts in the direction in which the test charge moves.

由于电容器产生一个均匀的场，我们假设力 电是恒定的，它是测试电荷的运动方向。