TITLE:
An Experiment to Improve the Model of Lumped Element Circuit
AUTHORS:
Tsao Chang
KEYWORDS:
Lumped Element Circuit Model, RL Circuit, Finite Time, Speed of Alternating Electricity
JOURNAL NAME:
Journal of Modern Physics,
Vol.9 No.4,
March
20,
2018
ABSTRACT: 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.