Which component is the same as a rheostat but uses three leads?

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Study for the Mechatronics End-of-Pathway (EOP) Test. Explore flashcards and multiple-choice questions, each with hints and explanations. Prepare confidently for your exam!

Multiple Choice

Which component is the same as a rheostat but uses three leads?

Explanation:
A potentiometer is the same resistive element as a rheostat but with three leads. It has a resistive track with two ends and a moving contact (the wiper). When you use all three terminals, it acts as a voltage divider, giving a variable voltage at the wiper proportional to knob position. If you use just the wiper and one end, it behaves like a rheostat, providing a variable resistance. The other components—capacitor, inductor, and diode—serve different functions (storing charge, storing magnetic energy, and rectifying current, respectively) and are not adjustable resistors with three leads.

A potentiometer is the same resistive element as a rheostat but with three leads. It has a resistive track with two ends and a moving contact (the wiper). When you use all three terminals, it acts as a voltage divider, giving a variable voltage at the wiper proportional to knob position. If you use just the wiper and one end, it behaves like a rheostat, providing a variable resistance. The other components—capacitor, inductor, and diode—serve different functions (storing charge, storing magnetic energy, and rectifying current, respectively) and are not adjustable resistors with three leads.

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