Now we add a third terminal up on top there, and depending on the voltage between the left and right terminal and that third voltage, you can change that current.

现我们顶部再加一个第三个端子，根据左端和右端压以及这个第三压，你以改变那个流。

So, when you measure the actual voltage between the terminals of the battery, you get a value that’s less than our ideal emf potential.

因此，当您测量池端子实际压时， 您会得到一个低于我们想动势值。

Furthermore, we can see that for clockwise and counterclockwise rotation of the potentiometer, we use a set of three terminals.

此外， 我们以看到， 对于位器顺时针和逆时针旋转，我们使用一组三个端子。

In a circuit, you model this effect as an internal resistance between the battery's terminals.

路中，您以将此效应建模为池端子内阻。

In a circuit, you model this effect as an internal resistance between the battery’s terminals.

路中，您将此效应建模为池端子内阻。

The shape of the bottom of the toggle is critical and makes it such that at any given time only one traveler is in contact with the common.

拨动开关底部形状至关重要，确保任何时刻只有一个旅行端子与公共端子接触。

Now, if you've ever installed a battery in… anything… you also know that one terminal of a battery is called positive and the other one is negative.

如果您曾经… … 任何东西中安装过池… … 您也知道池一个端子称为正极，另一个称为负极。

Instead of a common and two travelers as we saw in the three-way switch, four-way switches use two sets of two travelers.

与三路开关中使用公共端子和两个旅行端子不同，四路开关使用两组旅行端子。

So, when you measure the actual voltage between the terminals of the battery, you get a value that's less than our ideal emf potential.

因此，当您测量池端子实际压时，您会得到低于我们想动势位读数。

These travelers are a pair of wires that travel through the walls in order to connect one light switch to the other.

这些旅行端子是一对穿过墙壁线，用于连接一个拨动开关到另一个。

As you can see, the path of the electricity is flipped from each pair of traveler terminals to the other pair

如你所见，流路径每一对旅行端子进行了切换。

And electricity to flow from one screw terminal to the other, thus closing the circuit and powering the light.

并且流从一个螺丝端子流向另一个螺丝端子，从而闭合路并点亮灯光。

When we flip the toggle switch, one traveler is pushed away from the common by the bottom of the toggle switch, while the other traveler is in contact with the common.

当我们拨动拨动开关时，一个旅行端子被开关底部推离公共端子，而另一个旅行端子则与公共端子接触。

When the toggle is flipped, the two pairs of travelers on the left change to being connected to the opposite traveler on the right.

当拨动开关翻转时，左边两对旅行端子会改变为与右边相反旅行端子连接。

Now, when the toggle switch is flipped, the common terminal moves from being in contact with one traveler to being in contact with the other traveler.

现， 当拨动开关被切换时，公共端子会从与一个旅行端子接触变为与另一个旅行端子接触。

Here we have a metal bar or track connected to the common terminal along with two traveler metal bars, each connected to their own separate traveler terminals.

这里有一根金属条或轨道连接到公共端， 同时还有两根旅行者金属条，每根分别连接到各自独立旅行者端子上。

In contrast to the basic light switch, three-way switches have a common terminal and two traveler terminals.

与基本灯开关相比，三路开关有一个公共端子和两个旅行端子。