LRC 회로

소개

I. 서론
In last experiment, we performed experiment in LR circuit and RC circuit. However, in most cases, inductor, resistance and capacitor exist altogether. As we mentioned in last report, whole variables that affect the voltage of the circuit can be approximated to its second derivative. As this equation includes more than two different derivative terms, we need to use special method to solve this generally. However, because there is a standardized calculation method, we would use the method to solve this.
There are at least a few applications of one physical model in our modern life. However, for this LRC circuit, it is used in every electric tool. Especially, it is playing the leading role in making and maintaining information-oriented society. When it comes to dealing with electric signals, it enables us to freely amplify, differentiate, or integrate the given signals. This is essential technology in communication at a distance

목차

1. 서론
2. 이론
3. 실험 방법
4. 실험 결과
5. 결론 및 고찰

본문내용

We think the reason is that the square wave is composed of a lot of sine waves, so the frequency is different from each sine wave. Those infinitely many sine waves from high frequency to low frequency are all combined, and the current repeats this pattern. Thus the current graph looks like above.

V. 결론 및 고찰
In this experiment, we obtain a very good data. The obtained resonance frequency is very exact to our estimation. The small error about 30Hz is occurred because we measured the frequency with the range of 100Hz. If we measured the resonance frequency with the range of 10Hz, we would be able to find more correct data.
Thus we could conclude that:
1. The resonance frequency of LRC circuit is 1/sqrt(LC).
2. The resonance will be occurred when the reactance of inductor and capacitor are cancelled each other.
3. The resonance current of LRC circuit is the same as the ratio of voltage and resistance.
4. Because the square wave is composed of infinitely many sine waves, the current graph also looks like the combination of sine waves and repeats its pattern.

참고자료

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