Lenz's law

简明释义

楞次定律

英英释义

例句

1.In a transformer, Lenz's law 楞次定律 ensures that the energy is transferred efficiently without creating unnecessary losses.

在变压器中，Lenz's law 楞次定律确保能量有效传输而不产生不必要的损耗。

2.When a magnet is moved towards a coil, according to Lenz's law 楞次定律, the induced current will flow in a direction that opposes the motion of the magnet.

当磁铁向线圈移动时，根据Lenz's law 楞次定律，感应电流将以反对磁铁运动的方向流动。

3.The principle of Lenz's law 楞次定律 can be observed when dropping a magnet through a conducting tube; it falls slower due to the opposing induced currents.

当磁铁通过导电管掉落时，可以观察到Lenz's law 楞次定律的原理；由于反向感应电流，它掉落得更慢。

4.In electric generators, Lenz's law 楞次定律 helps explain why the induced current opposes the rotation of the generator's rotor.

在发电机中，Lenz's law 楞次定律有助于解释为什么感应电流会反对发电机转子的旋转。

5.Understanding Lenz's law 楞次定律 is crucial for designing electromagnetic braking systems in trains.

理解Lenz's law 楞次定律对于设计火车的电磁制动系统至关重要。

作文

Lenz's law is a fundamental principle in electromagnetism that describes the direction of induced currents. Formulated by the German physicist Heinrich Lenz in 1834, this law states that an induced electromotive force (emf) always generates a current that opposes the change in magnetic flux that produced it. In simpler terms, if a magnetic field changes within a closed loop of wire, the induced current will flow in such a way as to create a magnetic field that opposes the original change. This can be observed in various applications, from electric generators to transformers and inductors. To better understand Lenz's law (伦茨定律), let's consider a practical example. Imagine a magnet moving towards a coil of wire. As the magnet approaches, the magnetic field through the coil increases. According to Lenz's law (伦茨定律), the coil will generate a current that creates a magnetic field opposing the approaching magnet. If the magnet were to move away, the magnetic field through the coil would decrease, and the induced current would flow in the opposite direction to try to maintain the original magnetic field. This behavior highlights the conservation of energy and is consistent with the first law of thermodynamics, which states that energy cannot be created or destroyed, only transformed from one form to another.The significance of Lenz's law (伦茨定律) extends beyond theoretical physics; it has practical implications in many technologies we use today. For instance, in electric generators, when mechanical energy is converted into electrical energy, Lenz's law (伦茨定律) dictates how the induced current behaves. This is crucial for the efficient operation of generators, as the opposing forces must be managed to optimize energy conversion.Moreover, Lenz's law (伦茨定律) plays a vital role in inductive charging systems, where energy is transferred wirelessly through changing magnetic fields. Understanding the principles behind Lenz's law (伦茨定律) allows engineers to design more effective and safer charging devices.In addition, Lenz's law (伦茨定律) also explains why certain materials exhibit magnetic damping when exposed to changing magnetic fields. For example, if you drop a metallic object through a magnetic field, it will fall slower than it would in free fall due to the induced currents that create an opposing magnetic field, thus demonstrating the practical effects of Lenz's law (伦茨定律).In conclusion, Lenz's law (伦茨定律) is not just a theoretical construct; it is a principle that governs the behavior of induced currents in electromagnetic systems. By understanding Lenz's law (伦茨定律), we gain insight into the fundamental interactions between electricity and magnetism, which are essential for modern technology. As we continue to explore and innovate in the fields of electronics and electromagnetism, the importance of Lenz's law (伦茨定律) will undoubtedly remain a cornerstone of our understanding and application of these concepts.

伦茨定律是电磁学中的一个基本原理，描述了感应电流的方向。该定律由德国物理学家海因里希·伦茨于1834年提出，指出感应电动势（emf）总是产生与导致其产生的磁通量变化相反的电流。简单来说，如果在闭合的导线圈中磁场发生变化，感应电流将以一种方式流动，产生一个与原始变化相反的磁场。这可以在从发电机到变压器和电感器的各种应用中观察到。为了更好地理解Lenz's law（伦茨定律），我们考虑一个实际的例子。想象一根磁铁朝着一个线圈移动。当磁铁靠近时，穿过线圈的磁场增强。根据Lenz's law（伦茨定律），线圈将产生一个电流，创建一个与靠近的磁铁相反的磁场。如果磁铁远离，穿过线圈的磁场将减弱，而感应电流将朝相反方向流动，以试图维持原始的磁场。这种行为突出了能量守恒，并与热力学第一定律一致，该定律指出能量不能被创造或销毁，只能从一种形式转化为另一种形式。Lenz's law（伦茨定律）的重要性超越了理论物理，它在我们今天使用的许多技术中具有实际意义。例如，在电动发电机中，当机械能转化为电能时，Lenz's law（伦茨定律）决定了感应电流的行为。这对于发电机的高效运行至关重要，因为必须管理对立的力量以优化能量转化。此外，Lenz's law（伦茨定律）在电感充电系统中也发挥着重要作用，其中能量通过变化的磁场无线传输。理解Lenz's law（伦茨定律）背后的原理使工程师能够设计出更有效和安全的充电设备。此外，Lenz's law（伦茨定律）还解释了某些材料在暴露于变化的磁场时表现出的磁阻尼现象。例如，如果你让一个金属物体在磁场中自由下落，它的下落速度会比自由下落慢，因为感应电流创造了一个相反的磁场，从而证明了Lenz's law（伦茨定律）的实际效果。总之，Lenz's law（伦茨定律）不仅仅是一个理论构造；它是一个支配电磁系统中感应电流行为的原则。通过理解Lenz's law（伦茨定律），我们获得了电与磁之间基本相互作用的洞察，这对于现代技术至关重要。随着我们继续在电子和电磁学领域探索和创新，Lenz's law（伦茨定律）的重要性无疑将继续成为我们理解和应用这些概念的基石。