bad conductor

简明释义

不良导体

英英释义

例句

1.In science class, we learned that air is a bad conductor of sound compared to solids.

在科学课上，我们了解到，与固体相比，空气是一个导音性差的介质。

2.Plastic is a bad conductor of heat, which is why it is used for handles on cooking pots.

塑料是一个导热性差的材料，这就是它用于锅具把手的原因。

3.Rubber is a bad conductor of electricity, making it a great insulator.

橡胶是一个导电性差的材料，因而它是一个很好的绝缘体。

4.Glass is a bad conductor of electricity, making it safe for use in electrical appliances.

玻璃是一个导电性差的材料，因此在电器中使用是安全的。

5.Wood is considered a bad conductor of heat, which is why it's often used in construction.

木材被认为是一个导热性差的材料，这就是它常用于建筑的原因。

作文

In the world of physics, the concept of conductivity plays a crucial role in understanding how different materials interact with electricity and heat. Among these materials, some are classified as good conductors, while others are known as bad conductors. A bad conductor refers to a material that does not easily allow the flow of electric current or thermal energy. This property can significantly influence various applications in everyday life and technology.For instance, metals such as copper and aluminum are considered good conductors because they have free electrons that can move easily through their structure. In contrast, materials like rubber, wood, and glass are categorized as bad conductors due to their tightly bound electrons, which restrict the flow of electricity and heat. This distinction is important when designing electrical systems, as using bad conductors can help prevent unwanted electrical shocks and ensure safety.One real-world application of bad conductors is in the insulation of electrical wires. Insulators, which are typically bad conductors, are used to coat electrical wires to keep the electric current contained within the wire and prevent it from escaping. This is essential for maintaining the safety and efficiency of electrical systems. Without proper insulation made from bad conductors, the risk of short circuits and electrical fires would increase dramatically.Moreover, the thermal conductivity of materials also highlights the importance of bad conductors. For example, when constructing buildings, architects often choose materials with bad conductor properties for walls and roofs to improve energy efficiency. By using bad conductors, buildings can retain heat during winter and keep cool during summer, thus reducing the need for heating and cooling systems. This not only saves energy but also lowers utility costs for residents.In the kitchen, we can observe the significance of bad conductors as well. Cooking utensils made from materials like stainless steel or cast iron are often designed with handles made from bad conductors like plastic or wood. This design prevents heat from transferring to the handle, allowing cooks to grip pots and pans safely without burning their hands. The use of bad conductors in this context illustrates how they enhance safety and usability in everyday tasks.Additionally, in the realm of electronics, the choice of materials can determine the performance and durability of devices. Components such as circuit boards often utilize bad conductors for specific parts to control the flow of electricity. This careful selection ensures that devices operate efficiently while minimizing the risk of overheating and damage.In conclusion, understanding the properties of bad conductors is essential in various fields, from electrical engineering to construction and cooking. Their ability to resist the flow of electricity and heat makes them invaluable in ensuring safety, efficiency, and functionality in our daily lives. As technology continues to advance, the role of bad conductors will remain significant in shaping the future of materials science and engineering. By recognizing the importance of these materials, we can appreciate the intricate balance between conductivity and insulation that defines much of our modern world.

在物理学的世界中，导电性的概念在理解不同材料如何与电和热相互作用方面起着至关重要的作用。在这些材料中，有些被归类为良导体，而另一些则被称为坏导体。坏导体是指不容易允许电流或热能流动的材料。这一特性可以显著影响日常生活和技术中的各种应用。例如，铜和铝等金属被认为是良导体，因为它们有自由电子可以在其结构中轻松移动。相比之下，橡胶、木材和玻璃等材料由于其紧密结合的电子而被归类为坏导体，这限制了电和热的流动。这一区别在设计电气系统时非常重要，因为使用坏导体可以帮助防止不必要的电击并确保安全。坏导体的一个实际应用是在电线的绝缘层中。绝缘体通常是坏导体，用于涂覆电线，以保持电流在电线内流动，防止电流逸出。这对维护电气系统的安全性和效率至关重要。如果没有由坏导体制成的适当绝缘层，短路和电气火灾的风险将大大增加。此外，材料的热导率也突显了坏导体的重要性。例如，在建筑施工中，建筑师通常选择具有坏导体特性的材料作为墙壁和屋顶，以提高能源效率。通过使用坏导体，建筑物可以在冬季保持热量，在夏季保持凉爽，从而减少对供暖和制冷系统的需求。这不仅节省了能源，还降低了居民的公用事业费用。在厨房中，我们可以观察到坏导体的重要性。由不锈钢或铸铁制成的烹饪器具通常设计有由坏导体如塑料或木材制成的手柄。这种设计防止热量传递到手柄，使厨师能够安全地握住锅和平底锅，而不会烫伤手。坏导体在这种情况下的使用说明了它们如何增强日常任务的安全性和可用性。此外，在电子产品领域，材料的选择可以决定设备的性能和耐用性。电路板等组件通常在特定部分利用坏导体来控制电流的流动。这种精心的选择确保设备高效运行，同时最大限度地降低过热和损坏的风险。总之，理解坏导体的性质在多个领域中至关重要，从电气工程到建筑和烹饪。它们抵抗电流和热量流动的能力使它们在确保我们日常生活的安全性、效率和功能方面变得不可或缺。随着技术的不断进步，坏导体的角色将在材料科学和工程的未来中继续发挥重要作用。通过认识到这些材料的重要性，我们可以欣赏到定义我们现代世界的导电性和绝缘性之间微妙的平衡。