What does the diagram of an electric cell indicate?

The diagram (symbol) of an electric cell represents its two terminals and their polarity.

It is shown using two parallel lines:

• The longer line represents the positive terminal (+)
• The shorter line represents the negative terminal (−)

This symbol helps in understanding how the cell should be connected in a circuit and shows the direction of potential difference, which determines the flow of current.

Such diagrams are essential for circuit representation, making it easier to design, analyze, and communicate electrical setups clearly.