Question

Which electrical component limits the flow of the electric current, but the resistance can be changed?

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Answer

<p> Variable Resistor (or Rheostat)</p>

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<p> An electrical component which can limit the flow of an electric current, but has a resistance that may be altered, fulfils a key function. In any type of circuit, such component is both necessary and essential in controlling the amount of flow (current) safely. These are essentially variable elements and builders of electronic devices use them frequently to tune circuit behavior. The device mentioned in the question is a variable resistor, also called a rheostat. A potentiometer is another device that behaves as a changeable resistor, but it is typically used in a different way - it allows you to adjust voltage in stages throughout a device circuit.</p>

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