At the other end, the current energizes an electromagnet and this attracts the armature.

另一端，电流使电磁铁充电，并吸到电枢。

The Large Hadron Collider at Cern is a 27km loop of powerful electromagnets.

欧洲核子研究组织大型强子对撞机是一个长达27公里强大电磁线圈。

For you though, you're going to use the electromagnet without the crane.

不过，对于您来说， 您将没有起重机情况下使用电磁铁。

These electromagnets will help keep the superhot plasma in the center of a tube.

这些电磁铁将有助于将超热等离子体保持管子中心。

Changing the plasma flow would also change the craft's trajectory, at a rate controllable via the electromagnets.

改变等离子流也会改变飞器轨迹，其速率可通过电磁铁控制。

But Dr Laberge believes that doing without electromagnets has simplified the design and removed potential points of failure.

但 Laberge 博士认为，不使用电磁铁可以简化设计并消除潜障点。

We use electromagnets in all sorts of other applications, from motors to speakers and even medical scanners.

我们各种其他应用中使用电磁体，从电机到扬声器，甚至医疗扫描仪。

One type of temporary magnet is called an electromagnet.

一种类型临时磁铁称为电磁体。

And finally, electromagnets need a power source in order to generate the electricity required to produce magnetic fields.

最后，电磁体需要电源才能产生产生磁场所需电力。

This, though, required both high pressure, which is expensive to create, and the electromagnets themselves, which are costly to buy and costly to run.

不过这需要两种高压，成本很高，电磁铁本身购买和运成本就很高。

Let's take a moment to look at the definition of what an electromagnet is.

让我们花点时间看一下电磁体定义。

Electromagnets are materials that become magnets in the presence of electricity.

电磁体是有电情况下变成磁铁材料。

This makes electromagnets quite different from permanent magnets.

这使得电磁体与永磁体有很大不同。

So let's take a look at that and compare permanent magnets to electromagnets.

让我们看一下并将永磁体与电磁体进比较。

Electromagnets are typically made of loops of wire and a coil.

电磁体通常由线圈和线圈制成。

At the beginning of the gear train, a driver gear is rotated by an electromagnet  which provides the force to rotate the clock hands.

齿轮系开始处，驱动齿轮由电磁铁旋转，从而提供旋转钟表指针力。

A turbine spins a magnet inside a coil to produce electricity, and since electromagnets need a power source, this turbine is powered by wind.

涡轮机旋转线圈内磁铁来发电，由于电磁体需要电源，因此该涡轮机由风提供动力。

Permanent magnets have a fixed strength, but we just talked about how we can change the strength of electromagnets, so electromagnets have adjustable strength.

永磁体强度是固定，但是我们刚才讲了如何改变电磁铁强度，所以电磁铁强度是可调。

To read that information, your computer rotates sections of the disk past the head, which is a small electromagnet that has a coil of wire.

要读取该信息，您计算机将磁盘某些部分旋转经过磁头，磁头是一个带有线圈小型电磁体。

It's shaped like a doughnut, and it uses powerful electromagnets to suspend the super hot hydrogen plasma in a vacuum, keeping it stable and away from the walls of the machine.

它形状像一个甜甜圈， 它使用强大电磁铁将超热氢等离子体悬浮真空中，使其保持稳定并远离机器壁。