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<p>Adjustable resistors, also known as potentiometers, allow a degree of control over the resistance within a circuit. This gives them an advantage over other types of <a href="/web/c/passive-components/fixed-resistors/" target="_self">fixed resistor</a>, depending on your needs.</p><p>They are composed of a fixed resistive element, and a slider that is able to pass along the element. This is what changes the resistance of the circuit, and it is usually controlled externally.</p><h2>What are adjustable resistors used for?</h2><p>Adjustable resistors are most commonly used for volume control in TV and radio. They can also be used as part of a light dimmer, to indirectly affect the level of light.</p><h2>Types of adjustable resistor</h2><p>Adjustable resistors largely vary based on material</p><ul><li>Wirewound adjustable resistors use a coil of resistance wire, and offer the highest performance.</li><li>Cermet adjustable resistors are composed of ceramic and metal. They can withstand high temperatures, and are often used in trimmer resistors.</li><li>Carbon composition adjustable resistors are some of the most common types used, as they are a good all-purpose resistor.</li><li>Conductive plastic adjustable resistors use conductive plastic ink, and have a low noise output.</li></ul>

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