To understand the electrical circuit physically the circuit can be thought as a closed water system. It is just for the novice learners so that they can understand the electrical network physically without complex imagination. It is not like that electrical system is not analogous to other mechanical system. But for the learners who are first learning this they may find it difficult to compare it with mechanical system. Besides this, a water system is easy to understand physically. If a student wants to think further about the electrical characteristics he can easily do it.
Now what is this comparison? Let’s take the example of water connection of your washroom. Here the water initially stored in the overhead tank. Then through the pipe connection it reaches to the every taps in the washroom. When the taps are not opened still they contain the water inside the pipe. And they are ready to flow the water when the tap will open.
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