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MOSFET variable resistors are used in electronic amplifiers, filters, and oscillators, offering voltage-controlled resistance for signal processing. Cermet Variable Resistor: Cermet variable resistors, also known as cermet potentiometers or cermet trimmer resistors, are valued for their exceptional stability and durability. This potentiometer ...

Variable resistors are also frequently used as volume controls. By adjusting the variable resistor, you can change the current flowing through the speaker, controlling the volume. Conclusion. In conclusion, variable resistors are essential components in the world of electronics, providing a flexible and convenient method for adjusting ...

They can also be used to control the voltage across devices in a circuit too. Therefore, in applications where current control or voltage control is needed, these type of resistors come handy. Figure 1 shows some real life variable resistors. Symbolic Representation. The variable resistor is represented by a zig-zag line and an arrow across (or ...

A variable resistor is an electrical component that can be adjusted in resistance, making it useful for managing current, voltage, and signals in electronic circuits. Variable resistors, as opposed to fixed resistors, can change resistance over time within a specific range. Common types include potentiometers, which regulate audio levels and voltage; rheostats, which control current; and ...

What is a Variable Resistor? A variable resistor is a passive circuit element used in electrical and electronic circuits and devices to insert a resistance that can be changed as per requirements. It is simply a resistor with an adjustable resistance mechanism. By adjusting its resistance, it regulates the electric current in the circuit. A three-terminal variable resistor (two fixed ends and ...

Variable resistors are used in feedback control circuits to provide precise control and adjustments. In automation systems and servo motors, these resistors allow for the accurate positioning and movement of components. By using the variable resistor to feedback the desired position, the motor controller can adjust the output to reach the ...

Variable resistors. Variable resistors are used to adjust the resistance of a circuit. Its main types are single-turn variable resistor and multi-turn variable resistor. Its resistance value is some ohms to several kiloohms. Tolerance value is ±5% or ±10%.

Variable resistors find applications in controlling power consumption and performance of household devices like heaters, air conditioners, refrigerators, ovens, mixers, drills, etc. Connected as rheostats or potentiometers, they adjust the current or voltage flowing through the appliances. For instance, a dimmer switch uses a variable resistor ...

When a variable resistor is used as a potential divider by using 3 terminals it is called a potentiometer. When only two terminals are used, it functions as a variable resistance and is called a rheostat. Electronically controlled variable resistors exist, which can be controlled electronically instead of by mechanical action.

Variable resistors are widely used in electric circuits to adjust the value of current or voltage, since the resistance of variable resistors can be set to a certain value. Variable resistors allow you to adjust the value of voltage by changing the resistance and keeping current constant .

Variable resistors are mostly used when the user do not know what exact resistance value does he want. The process of limiting or restricting the electric current to a certain level is called resistance. The device, which is used to restrict the flow of electric ...

The different types of variable resistors include the following. Potentiometer. This is one of the most common variable resistor used. In this type, based on the position, the voltage is varied. Hence the name is given as a potential-meter or potentiometer. Also called a rotary rheostat. It has got three terminals as shown in the figure below.

Uses of Variable Resistors. A Variable Resistor can be used mostly in two different ways. When one end of the resistance track and wiper terminal is connected with the circuit, then-current through the resistor limits according to the position of the wiper contact on the resistance track.

Variable resistors come in vertical and horizontal configurations, with the former mainly used in small-signal circuits and the latter suitable for various applications. Plastic Case: Variable resistors housed in plastic cases are smaller and have a round structure. They have three downward-facing pins and an upward-facing resistance adjustment ...

A voltage divider is a simple circuit that can be used to reduce the voltage in a circuit. The output voltage depends on the ratio of two resistors connected in series. The output voltage is taken from a point between the two resistors. To calculate the output voltage of a voltage divider, use the Voltage Divider Equation below:

Variable resistors are mostly used for device calibration. Working of Variable Resistor. As shown in the diagram below, a variable resistor consists of a track which provides the resistance path. Two terminals of the device are connected to both the ends of the track. The third terminal is connected to a wiper that decides the movement of the ...

Variable resistors are extensively used in electrical circuits to adjust current or voltage levels due to their ability to have their resistance set to specific values. By altering the resistance, variable resistors enable the adjustment of voltage while maintaining a constant current.

When a variable resistor is used as a potential divider by using three terminals it is called a potentiometer. When only two terminals are used, it functions as a variable resistance and is called a rheostat. Electronically controlled variable resistors exist, which can be controlled electronically instead of by mechanical action.

Variable resistors are used to dynamically change the resistance to control the current in a circuit, and may also be used as a voltage divider. For example, they are used to control the volume on a radio. Potentiometers differ from regular resistors in that they have three terminals instead of two. The middle terminal is the “wiper.”