Trades Qualification (TQ) Practice 3rd Year Practice Test

In electrical schematics, which symbol best represents a resistor?

Long squiggly line Circle Rectangle Box with diagonal line inside

Correct Answer:

Long squiggly line

Explanation:

The symbol for a resistor is a long squiggly line because this jagged line has been the traditional, quickly recognizable representation of resistance in many schematic conventions, especially in common classroom and US-based diagrams. It stands out clearly from other components, so you can scan a circuit and immediately spot where resistance is placed. While some standards use a rectangle for a resistor, that variant isn’t the symbol used in this context, and the other shapes shown don’t match how resistors are typically drawn. So the long squiggly line is the best choice because it aligns with the common depiction of a resistor in everyday schematics.

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