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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] …

I created a simple tool to find the square root of any number using Newton’s algorithm. ★How to use★ If you enter numerical values ​​in the text boxes ① to ③ and tap the automatic calculation button, the results will be displayed in the text box ④. ①Initial value x0➡︎Any number is OK. ②k➡︎Enter the …

I created a simple tool to find the greatest common divisor of two natural numbers using Euclidean Algorithm. ☆How to use☆ step1 Enter numerical values ​​for natural numbers α and β. The input range is 8 digits (1 to 99999999). step2 When you tap (click) the automatic calculation button, the calculation result will be displayed …

Considering the RL series circuit shown in Figure 1, and assuming that the DC power supply is E and the current that flows through the circuit after t seconds is I, the following formula holds true. $$E=RI+L\frac{dI}{dt}\hspace{50pt}(1)$$ Let’s consider how to solve a differential equation using the Laplace transform to find the current I. Laplace …

fig.1 RL series circuit(Alternating current) Now, let’s consider an RL series circuit as shown in Figure 1, assume the AC power source is E, and think about how to find the current I that flows t seconds after turning on the switch. Now, in the circuit of Figure 1, the following circuit equation holds true …