potential difference

简明释义

电势差

英英释义

例句

1.The battery provides a potential difference 电势差 of 9 volts.

电池提供了9伏的电势差。

2.Measuring the potential difference 电势差 across the resistor helps us understand its behavior.

测量电阻器上的电势差有助于我们理解其行为。

3.In a circuit, the potential difference 电势差 drives the current flow.

在电路中，电势差推动电流流动。

4.A voltmeter is used to measure the potential difference 电势差 in an electrical circuit.

电压表用于测量电路中的电势差。

5.The potential difference 电势差 between the two points determines the energy available for work.

两个点之间的电势差决定了可用于工作的能量。

作文

In the realm of physics, particularly in the study of electricity, the term potential difference refers to the difference in electric potential between two points in an electric field. This concept is fundamental to understanding how electrical circuits function and how energy is transferred within them. The potential difference is measured in volts (V) and is often described as the driving force that pushes electric charge through a circuit. When we talk about potential difference, we are usually referring to the voltage supplied by a battery or another power source, which creates a flow of electrons through conductive materials.To elaborate further, consider a simple circuit consisting of a battery and a light bulb. The battery has a positive terminal and a negative terminal, creating a potential difference across its terminals. This potential difference causes electrons to move from the negative terminal to the positive terminal through the circuit. As the electrons flow, they carry energy with them, which is then used to illuminate the light bulb. This process illustrates how potential difference is essential for the operation of electrical devices.Understanding potential difference also involves recognizing its relationship with current and resistance, as described by Ohm's Law. According to this law, the current (I) flowing through a conductor between two points is directly proportional to the potential difference (V) across those points and inversely proportional to the resistance (R) of the conductor. This can be expressed with the formula: V = I × R. Thus, if you increase the potential difference in a circuit while keeping the resistance constant, the current will also increase. This principle is crucial for designing circuits and ensuring they operate safely and efficiently.Moreover, the significance of potential difference extends beyond simple circuits. In more complex systems, such as those found in electronics and telecommunications, potential difference plays a vital role in signal transmission and processing. For example, in integrated circuits, varying potential differences are used to represent digital signals, allowing for the operation of computers and other electronic devices. The manipulation of potential difference allows engineers to design circuits that can perform a multitude of functions, from simple calculations to complex data processing tasks.In conclusion, the concept of potential difference is not only foundational in the study of electricity but also crucial for the practical applications of electrical engineering. It is the key to understanding how energy is transferred in circuits and how various devices operate. By grasping the principles surrounding potential difference, one can appreciate the intricate workings of the electrical systems that power our modern world. As technology continues to advance, the importance of understanding potential difference will only grow, making it a vital topic for students and professionals alike in the fields of science and engineering.

在物理学领域，特别是在电学研究中，术语电位差指的是电场中两点之间的电位差。这一概念是理解电路如何运作以及能量在其中如何传递的基础。电位差以伏特（V）为单位进行测量，通常被描述为推动电荷通过电路的动力。当我们谈论电位差时，通常指的是电池或其他电源提供的电压，这种电压产生了通过导体材料的电子流动。进一步阐述，考虑一个由电池和灯泡组成的简单电路。电池有正极和负极，在其极间产生了电位差。这种电位差导致电子从负极流向正极，穿过电路。当电子流动时，它们携带着能量，这些能量随后被用于照亮灯泡。这个过程说明了电位差对电气设备操作的重要性。理解电位差还涉及到认识它与电流和电阻之间的关系，如欧姆定律所描述的那样。根据这一定律，流经两个点之间导体的电流（I）与这两个点之间的电位差（V）成正比，与导体的电阻（R）成反比。这个关系可以用公式表达：V = I × R。因此，如果在保持电阻不变的情况下增加电路中的电位差，电流也会随之增加。这个原理对于设计电路和确保其安全高效地运行至关重要。此外，电位差的意义不仅限于简单电路。在更复杂的系统中，例如电子学和电信中，电位差在信号传输和处理方面发挥着重要作用。例如，在集成电路中，不同的电位差用于表示数字信号，从而实现计算机和其他电子设备的操作。对电位差的操控使工程师能够设计出可以执行多种功能的电路，从简单的计算到复杂的数据处理任务。总之，电位差的概念不仅是电学研究的基础，也是电气工程实际应用的重要组成部分。它是理解电路中能量如何转移以及各种设备如何工作的关键。通过掌握有关电位差的原则，人们可以欣赏到为我们的现代世界提供动力的电气系统的复杂运作。随着技术的不断进步，理解电位差的重要性只会增加，这使其成为科学和工程领域的学生和专业人士必须掌握的主题。