An Experiment to Improve the Model of Lumped Element Circuit

• 作者: Tsao Chang
• 来源期刊: 现代物理(英文)
• 学科: 数学
• 关键词: Lumped Element CIRCUIT Model RL CIRCUIT FINITE Time SPEED of ALTERNATING ELECTRICITY
• 年，卷（期）: 2018,（4）
• 页码范围: 596-606
• 页数: 11页
• 分类号: O1

摘要

The model of lumped element circuit ignores the finite time of signals to propagate around a circuit. However, using modern oscilloscope, the time of nanoseconds in a circuit can be measured. Then the speed of alternating electricity can be obtained in a RL circuit. A typical RL circuit is formed by a power source, wire, resistance and inductance. The basic formula is: U(t)=I(t)R+LdI(t)/dt. It can be derived from the Ohm’s law and Kirchhoff laws. Based on our experimental results, this paper has discussed the new explanation of this equation in a RL circuit. As a result, the speed of alternating electricity is greater than light in a special RL circuit. The model of lumped element circuit can be improved when considering the finite time of signals.