a Device used to charge the resistencein an electric circute
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Potentiometer
Answer. Potentiometer are used often to change the resistance without changing the voltage source in an electric circuit.
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potentiometer
A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. ... Potentiometers are rarely used to directly control significant power (more than a watt), since the power dissipated in the potentiometer would be comparable to the power in the controlled load.
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