Circuit analysis question

Why to learn the circuit analysis?

为什么要学习电路分析？

Because it is one of the important theoretical basis of electrical, electronic and information science and technology. It can make us understand the characteristics of the circuit. To solve the engineering problems.

因为它是电力电子和信息科学技术的重要理论基础之一，它可以帮助我们理解电路中的特性，以便解决工程上的问题.

Ok I know, and what are the analytical methods of the circuit?

好的，我知道，那么电路中有什么分析方法呢？

In brief, there are equivalent method and equation method, equivalent method is simplified primary circuit, suitable for local variables. And equation method is according to the basic principle of the circuit, the equation is solved.

简而言之，有等效法和方程法，等效法是把电路化简，适合于局部电路，方程法是根据电路基本原理列方程解决.

You say that equation method is according to the basic principle of the circuit, the equation is solved, then what basic theorems are needed to be used in constructing equations, can you give an example?

你刚刚说方程法是根据电路基本原理列方程解决，那么在构造方程时需要用到什么原理呢？可以举一个例子吗？

Sure. For example in the lumped circuit, any moment, to any node, the algebraic sum of the branch current of all the outflow nodes is equal to zero, this is KCL.

当然可以，例如在集总电路中，任何时刻，对任一结点，所有流出结点的支路电流的代数和恒等于零，这是基尔霍夫电流定律.

Can you tell me about the difference between dynamic and static circuits?

你可以告诉我动态电路和静态电路的区别吗？

Ok, in short, if there is a variable resistor in the circuit, it is the dynamic circuit, otherwise it is a static circuit.

当然，简单来说，如果电路中存在可变电阻，它就是动态电路，反之为静态电路.