There's a small solenoid under there that will push the domino up every minute.

下面有一个小线管，每分钟都会把多米诺骨牌推上去。

Unless otherwise stated, all solenoids in this class will be treated as ideal solenoids.

除非另有说明，此类所有线管都将被视为理想线管。

See, that coil of wire is a special shape called a solenoid.

你看，那一圈电线是一个特殊形状 它被称为线管。

The main component of the composition was the solenoid of the superconducting magnet they were still installing.

组成主要部件是他们仍在安装超导磁体线管。

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

理想线管是创建均匀磁场非常常见工具。

The cross section of a solenoid looks like this.

线管横截面如下所示。

In the U.S., General Atomics has been able for example to deliver the first set of the central solenoid, ” said Bigot.

在美国，通用原子航空系统公司够交付第一批央线管。”

We also talked about the forces between two parallel wires, and the magnetic field created by a solenoid.

我们还讨论了两条平行线之间力，以及线管产生磁场。

But, how does that work with all of those currents along the top of the solenoid?

但是，线管顶部所有电流是如何工作呢？

You know, standardized platform with the motors and the battery when it operates, little solenoids that will lock it in place and get low-voltage power.

还有带着发动机和电池标准平台，还有可以固定在一个地方收集低压电力小丝管。

An ideal solenoid has zero magnetic field outside its cylinder.

理想线管在其圆筒外部具有零磁场。

Clockwise above the bottom row of currents in the solenoid means the magnetic field there is to the right.

线管底部一排电流上方顺时针方向表示磁场位于右侧。

On the top of the solenoid, the cross-section shows that all the currents are out of the screen and are in blue.

在线管顶部，横截面显示所有电流均从屏幕流出并呈蓝色。

I can see how this is an ideal representation of solenoids.

我可以看出这是线管理想代表。

This magnetic field map is an ideal representation of the magnetic fields caused by an ideal solenoid.

该磁场图是理想线管产生磁场理想表示。

And clockwise below the bottom row of currents in the solenoid means the magnetic field there is to the left.

线管底部一排电流下方顺时针方向意味着磁场位于左侧。

Now, we get to derive the equation for the magnetic field inside a solenoid!

现在，我们可以推导出线管内磁场方程！

And when a solenoid has a current running through it, it produces a magnetic field, basically all of which goes through the inside of the coils.

当线管有电流流过它时，它会产生一个磁场，基本上它会在线圈内部通过。

Again, this solenoid is made out of one wire, which means all of these currents are in the same wire and have the same magnitude.

同样， 该线管由一根导线制成，这意味着所有这些电流都在同一导线并且具有相同幅度。

Let's call side 1 the side inside the solenoid and parallel to the magnetic field.

我们将线管内部且平行于磁场一侧称为侧面 1。