Think of a rubber band as magnetic field line.

把磁场线想象成橡皮筋。

But remember, these magnetic field lines get tangled up.

但是记住，这些磁场线是纠缠在一起的。

Around the edges of sunspots, the magnetic field lines are concentrated.

在太阳黑子的边缘，磁力线是集中的。

And when they do, their magnetic field lines become extremely twisted.

当它们（旋转时），它们的磁力线变得非常的扭曲。

Twisted magnetic field lines mean more energy and more energy means the potential for huge eruptions.

扭曲的磁场线意味着更大的能量，而更多的能量意味着存在巨大喷发的可能性。

Cruise along a magnetic field line and see how the ionosphere's charged material also interacts with Earth's own magnetic field.

沿着磁力线航行，看看电离层的带电物质是如何与地球磁场相互作用的。

Because magnetic field lines emanate from the North and South Poles, energy from solar storms has easy access to those regions.

因为地球的磁力线是从北极和南极发出的，所以太阳风暴的能量轻易地进入这些区域。

Like flares, they form when tangled magnetic field lines erupt, blasting out energy, but they occur higher off the Sun's surface.

和耀斑一样，它们是在混乱的磁力线爆发时形成的，释放出能量，但它们发生在离太阳表面更高的地方。

We think these magnetic field lines are feeding energy from the Sun's surface into the corona, which is why it's so much hotter.

我们认为这些磁力线从太阳表面向日冕运输能量，这就是为什么日冕如此高温的原因。

I thought all magnetic field lines were closed loops.

我认为所有的磁力线都是闭环的。

Therefore, these magnetic field lines would be closed loops that are infinitely large.

因此，这些磁力线将是无限大的闭环。

You have all this plasma that is really turning and turning and that causes magnetic field lines to become twisted and intertwined and mixed up.

所有的这些等离子体都在不停的旋转、旋转，这会造成磁场中的磁力线发生扭曲，并缠绕、纠结在一起。

This means that the magnetic field lines surrounding a magnet always form closed loops.

这意味着围绕磁铁的磁场线 总是形成闭合回路。

I can draw these little field lines that show the direction of the field and its strength.

我可以画出这些小场线来显示场的方向及其强度。

Solar storms will even bend and break the magnetic field lines on the far side of the Earth, allowing charged particles to zip back down the field lines toward the north and south poles.

太阳风暴甚至会在距离地球很远的地方扭曲和破坏地球的磁力线，让带电粒子沿着磁力线落进北极和南极。

Finally, some of Earth's magnetic field lines are weakened and pushed away from the earth by the solar wind, a violent stream of plasma emanating from our sun.

最终，地球上的一些磁场线被削弱，被太阳风（即太阳生成的暴烈等离子体流）推出地球。

First, the force is stronger, the closer to perpendicular the charge's velocity is to the magnetic field lines.

首先，力越大，电荷的速度越接近垂直于磁场线。

So the current is perpendicular to the magnetic field lines.

所以电流垂直于 磁场线。

You can think of the Earth as a giant bar magnet, where the magnetic field lines go from magnetic north to south.

您可以将地球想象成一个巨大的磁棒，磁力线从地磁北向南延伸。

Expressed with field lines, the magnetic field would appear as circles, with the wire at their center.

用磁力线表示，磁场将 显示为圆形，导线位于其中心。