电是一种能源。电是电子的流动。所有物质都由原子组成,原子有一个中心,称为原子核。核包含称为质子的带正电粒子和称为中子的不带电粒子。原子核被称为电子的带负电粒子包围。电子的负电荷等于质子的正电荷,原子中的电子数通常等于质子的数量。当质子和电子之间的平衡力被外力扰乱时,原子可能获得或失去电子。当电子从原子“丢失”时,这些电子的自由运动构成电流。电是自然界的基本组成部分,是我们最广泛使用的能源形式之一。我们从其他能源转换中获得电力,这是一种二次能源,如煤炭,天然气,石油,核能和其他自然资源,这些资源被称为主要资源。许多城镇和瀑布(机械能的主要来源)一起建造,使水轮转向工作。在100多年前开始发电之前,房屋用煤油灯点燃,食物在冰箱中冷却,房间用燃木或燃煤炉加热。从本杰明富兰克林在费城风筝暴风雨之夜的实验开始,电力原理逐渐被理解。在19世纪中期,随着电灯泡的发明,每个人的生活都发生了变化。在1879年之前,电弧已被用于室外照明的弧光灯。灯泡的发明用电来为我们的家庭带来室内照明。

加拿大卡尔加里大学Essay代写:电力的释义

Electricity is a form of energy. Electricity is the flow of electrons. All matter is made up of atoms, and an atom has a center, called a nucleus. The nucleus contains positively charged particles called protons and uncharged particles called neutrons. The nucleus of an atom is surrounded by negatively charged particles called electrons. The negative charge of an electron is equal to the positive charge of a proton, and the number of electrons in an atom is usually equal to the number of protons. When the balancing force between protons and electrons is upset by an outside force, an atom may gain or lose an electron. When electrons are “lost” from an atom, the free movement of these electrons constitutes an electric current. Electricity is a basic part of nature and it is one of our most widely used forms of energy. We get electricity, which is a secondary energy source, from the conversion of other sources of energy, like coal, natural gas, oil, nuclear power and other natural sources, which are called primary sources. Many cities and towns were built alongside waterfalls (a primary source of mechanical energy) that turned water wheels to perform work. Before electricity generation began slightly over 100 years ago, houses were lit with kerosene lamps, food was cooled in iceboxes, and rooms were warmed by wood-burning or coal-burning stoves. Beginning with Benjamin Franklin’s experiment with a kite one stormy night in Philadelphia, the principles of electricity gradually became understood. In the mid-1800s, everyone’s life changed with the invention of the electric light bulb. Prior to 1879, electricity had been used in arc lights for outdoor lighting. The lightbulb’s invention used electricity to bring indoor lighting to our homes.

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