If only two leads are used on a variable resistor, it is called a ?

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Prepare for the 1-4 Missouri Valley Test. Use multiple choice questions and flashcards with explanations. Ready yourself for the exam with interactive learning and detailed insights!

Multiple Choice

If only two leads are used on a variable resistor, it is called a ?

Explanation:
When a variable resistor is wired with only two leads, it functions as a rheostat. A potentiometer is normally a three-terminal device used as a voltage divider; using just two leads makes it behave like a rheostat, but the standard two-terminal name for this setup is rheostat. The other options don’t describe a two-terminal variable resistor: a toggle switch merely opens or closes a circuit, and a regulator maintains a set voltage or current.

When a variable resistor is wired with only two leads, it functions as a rheostat. A potentiometer is normally a three-terminal device used as a voltage divider; using just two leads makes it behave like a rheostat, but the standard two-terminal name for this setup is rheostat. The other options don’t describe a two-terminal variable resistor: a toggle switch merely opens or closes a circuit, and a regulator maintains a set voltage or current.

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