REE10R

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Rotary potentiometers and rheostats are devices used to control electric current in circuits. They are similar in operation, but they are different in terms of construction. A rotary potentiometer is a three-terminal device that has a sliding contact, which is typically a wiper, that can be rotated to vary the resistance of a resistive element.

The movement of the wiper determines the output. When the wiper is moved, a varying electrical voltage or current is produced. This is the basis for the operation of rotary potentiometers. The device can be used to control electric current in circuits, such as in bias circuitry in amplifiers or in adjusting resistive loads in many electronic applications.

A rheostat is also a three-terminal device, however instead of having a sliding contact, the rheostat has a resistive element with two fixed contacts, or taps. The resistance is varied by moving the tap along the length of the resistive element. This movement can be done manually with a screwdriver, or it can be automated with motors or other devices. The output is the same, varying electrical voltage or current is produced.

The primary application of rotary potentiometers is in feedback circuits, where they can be used to adjust gain or output levels. They can also be used in bias circuitry to adjust and control the gain of a certain stage of an amplifier. Rheostats are also used in feedback circuits, however they are most commonly used to control the current flow in a load.

Both rotary potentiometers and rheostats are used in a wide range of applications, from audio consoles and musical instruments to motor speed and lighting control systems. They can also be used in a wide range of industrial applications, such as controlling the speed of a conveyor belt and controlling the current in a motor.

In summary, rotary potentiometers and rheostats are two different devices used to control electric current in circuits. Rotary potentiometers are used for adjusting gain or output levels, while rheostats are used to control the current flow in a load. Both devices have applications in a wide range of fields, from audio equipment to industrial automation.

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