I wrote about the idea of ​​representing AC circuits using complex numbers. Consider an RLC series circuit as shown in Figure 1. Now, the instantaneous value of the current flowing through this circuit is $$i(t)=I_m\sin(\omega t-\theta)\hspace{185pt}(1)$$ The instantaneous value of voltage is $$e(t)=Ri(t)+L\frac{di(t)}{dt}+\frac{1}{C}\int i(t)dt\hspace{130pt}(2)$$ $$=RI_m\sin(\omega t-\theta)+L\frac{d}{dt}\{I_m\sin(\omega t-\theta)\}+\frac{1}{C}\int I_m\sin(\omega t-\theta)dt\hspace{15pt}(3)$$ Here, there are two options: to …

Let’s draw a speed graph of your favorite car using the easy graph drawing tool! ◉How to use◉ step1 Enter a number in the text box below. The value to enter is the value written on the spec sheet of your car or motorcycle. step2 A graph is automatically drawn according to the input values. …

Easily find your car’s top speed using our calculator! ◉How to use◉ step1 Please enter numbers in all text boxes from ① to ⑦. The value to be entered is the value written in the specification sheet of the motorcycle or car. step2 The calculation result will be displayed in ⑧. サンプル ①Engine RPM r[rpm] …