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

在电路中，您将此效应建模为电池端子之间的内阻。

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

在电路中，您可以将此效应建模为电池端子之间的内阻。

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

并且电流螺丝端子流向另螺丝端子，而闭合电路并点亮灯光。

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

基本的电灯开关相比，三路开关有公共端子和两旅行端子。

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

此外， 我们可以看到， 对于电位器的顺时针和逆时针旋转，我们使用组三端子。

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

这些旅行端子是对穿过墙壁的电线，用于连接拨动开关到另。

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，当您测量电池端子之间的实际电压时， 您会得到低于我们理想的电动势的值。

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，当您测量电池端子之间的实际电压时，您会得到低于我们理想电动势电位的读数。

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

三路开关中使用的公共端子和两旅行端子不同，四路开关使用两组旅行端子。

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，电流路径在每对旅行端子之间进行了切换。

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.

现在， 当拨动开关被切换时，公共端子会旅行端子接触变为另旅行端子接触。

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.

如果您曾经在… … 任何东西中安装过电池… … 您也知道电池的端子称为正极，另称为负极。

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，左边的两对旅行端子会改变为右边的相反旅行端子连接。

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的独立旅行者端子上。

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.

现在我们在顶部再加第三端子，根据左端和右端之间的电压以及这第三电压，你可以改变那电流。

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.

拨动开关底部的形状至关重要，确保在任何时刻只有旅行端子公共端子接触。

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，旅行端子被开关底部推离公共端子，而另旅行端子则公共端子接触。