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Variable resistors can be used to adjust circuit elements (such as a volume control or a lamp dimmer), or as sensing devices for heat, light, humidity, force, or chemical activity. Resistors are common elements of electrical networks and electronic circuits and are ubiquitous in electronic equipment.
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A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat.
Jun 18, 2023 · A variable resistor is defined as a resistor whose value of electrical resistance can be changed on demand. It is a common component in electronic circuits that allows the adjustment of current or voltage according to Ohm’s Law.
May 21, 2020 · Variable resistors are resistors that change resistance from zero to a certain maximum value. They are commonly used as volume controls and voltage regulators. Variable resistors can be categorized into three types: Potentiometers. Rheostats. Digital potentiometers. Symbols for Variable Resistors. Potentiometer. Rheostat. Preset Resistor.
What is a Variable Resistor? A variable resistor is a resistor of which the electric resistance value can be adjusted. A variable resistor is in essence an electro-mechanical transducer and normally works by sliding a contact (wiper) over a resistive element.
A potentiometer is a manually adjustable variable resistor with 3 terminals. Two of the terminals are connected to the opposite ends of a resistive element, and the third terminal connects to a sliding contact, called a wiper, moving over the resistive element.
