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Electric circuit is used by electrons from a current source or voltage power.
Such abstract concepts can be explained using analogies which use familiar words or ideas to represent the ideas which need to be conveyed. Analogies are selected which students should already be familiar with. However, no single analogy can represent all features of an electrical circuit and there are important differences between the analogies used and circuits. Instead appropriate analogies should be chosen to teach selected concepts and students should be prompted to compare analogies with circuits and identify how they differ.
Schematics use symbols to represent components in the circuit. Conventions are used in a schematic to represent the way electricity flows. The common convention we use is from the positive to the negative terminal. The realistic way electricity flows is from the negative to the positive terminal.
One way to make this topic more accessible is to use analogies (Lakoff and Johnson 2008). Analogies are examples which possess similar features, or work in a comparable manner, to the ideas that you wish to teach (Harrison and Coll 2007). They offer an excellent method of visualising difficult and unfamiliar concepts, or ideas that can not be directly seen.