An electric field pushes a flame away from a burner in a recent Harvard experiment.
在哈佛的一项近期实验中，一个电场把火焰从燃烧器上推开。
The essential condition for the decay of the vacuum is the presence of an intense electric field.
真空衰变的基本条件是存在强电场。
In 1832, the year of Michael Faraday's discovery that a changing magnetic field produces an electric field, a young French engineer patented a new and more efficient waterwheel.
1832年，也就是迈克尔·法拉第发现磁场变化会产生电场的那一年，一位年轻的法国工程师为一种新的、效率更高的水车申请了专利。
这是电场。
Let me focus today on the electric field.
今天先讲讲电场。
And that electric field can be used to power up things.
并且这个电场能被用来供能。
That one tells you about the curl of the electric field.
那个关于电场旋度的方程。
Another way of growing snowflakes is to use an electric field.
另一种制造雪晶的方法就是使用电场。
The pore must produce a strong electric field to hold the DNA in place.
要想固定dna，纳米孔就必须产生很强的电场。
The electric field grabs the negatively charged DNA and holds it in place.
电场会“抓住”DNA，将它固定在纳米孔中。
Let's say that we want to find the flux of the electric field out of a closed surface.
我们想要找出，电场对于一个封闭曲面向外的通量。
The scientists applied a force to the ions by imposing an additional electric field on them.
科学家通过多加了一个电场来对离子施力。
Like all particle accelerators, it USES an electric field to speed up electrically charged particles.
跟所有粒子加速器一样，DWA利用电场对带电粒子进行加速。
That asymmetry makes the plastic piezoelectric: it changes shape when it encounters an electric field.
这个不均衡导致了塑料具有压电性，会随着电压的改变而改变形状。
Just to give you formulas, the force caused by the electric field is the charge times the electric field.
先给出一个公式，电场生成的力，等于电荷与电场之积。
A changing magnetic field, of course, gives rise to an electric field, as had been established by Faraday.
当然一个变化的磁场会产生电场，就像法拉第做的那样。
As the switches are hit by a carefully timed sequence of laser pulses, a powerful electric field is created.
当开关受到分时激光脉冲连续撞击时，就会形成一个强大的电场。
Some challenges remain, such as explaining where the background electric field that charges the particles came from.
某些难题依然没有被完全解决，例如如何去解释使微粒带电的背景电场从何而来？
For example, the electric field or gravitational field is given by the gradient of the gravitational or electric potential.
例如由重力势梯度给出的重力场，或由电势梯度给出的电场。
The energy within this circuit oscillates rapidly between an electric field in the capacitor and a magnetic field in the coil.
电容产生电场，线圈生成磁场，电路中的能量就在电场和磁场之间高速振荡。
When light waves were projected onto the disc, the direction of the electric field within the waves aligned with the gold nanorods.
当光波被投射到光盘上时，光波内电场的方向会与金纳米棒相一致。
But if the dipoles form in the presence of an existing electric field, they immediately align along the same direction as the field.
但是，如果这些电偶极子处于电场中，他们就会立即沿电场的方向排列。
They state that a moving electric charge will generate a magnetic field while a shifting magnetic field similarly creates an electric field.
它们表明，变化的电荷会产生磁场，变化的磁场同样能够产生电场。
The exciting part of Cademartiri's experiments is to show that an electric field can influence a flame from a distance without moving parts.
Cademartiri的实验中精彩的部分是，展示了电场可以从一定距离以外影响火焰而无需移动零件。
At the core of the motor are piezoelectric materials-special crystals or ceramics that change shape very slightly in the presence of an electric field.
这个马达的核心是压电材料-特殊晶体或陶瓷，这些材料在电场出现时形状改变非常小。
They sort left from right versions using circularly polarised light, whose electric field corkscrews through space in a left or right-handed direction.
旋转偏振光被他们用来筛选左手性和右手性分子，这种光的电场以左手或右手螺旋形式在空间旋进。
As an object heats up it radiates heat, but it also generates an electric field near its surface as a result of the random thermal motion of its atoms.
物体温度升高后就会辐射出热量，但由于原子的无规则热运动，在物体表面附近还会产生电场。
OK. In general you could extend this analysis to include vibrations, rotations, energy in a magnetical field, electric field, et cetera. Any questions?
一般的,可以把上面的分析扩展到包含振动，转动以及电磁场能量等等，有问题吗？
OK. In general you could extend this analysis to include vibrations, rotations, energy in a magnetical field, electric field, et cetera. Any questions?
一般的,可以把上面的分析扩展到包含振动，转动以及电磁场能量等等，有问题吗？
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