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Rotary Potentiometers and Rheostats, though very similar, have distinct differences. Both are electrical components used in a variety of applications. Areas such as telecommunications, automotive, industrial, and even major appliances can contain these devices.The most major difference between the two components is the type of circuitry they are connected to. Potentiometers are made up of a variable resistive element and two terminal connections. One of those connections is wired to the resistive element and the other is connected to the other end of the resistance. Thus, the Variable Resistance offers a constant resistance regardless of the amount of current, while the Potentiometer has a linear resistance, varying with the amount of current.Rheostats, on the other hand, are made from a variable resistor, but instead of having two terminals, have only one connection. This connection is wired to the variable resistor and the second terminal is connected to the opposite end of the resistance. As such, a Rheostat is able to offer a non-linear resistance, meaning that the resistance changes depending upon the amount of current.Now, what are the working principles for both of these components? First of all, potnetiometers work by allowing the current to flow in a linear fashion through the resistive element. This means that the resistance increases proportionally with the increase in the amount of current. As such, this type of potnetiometer is often referred to as a linear potnetiometer.On the other hand, rheostats work by allowing the current to flow in a non-linear fashion through the variable resistor. This means that the resistance increases at a different rate depending on the amount of current. As such, this type of rheostat is often referred to as a non-linear rheostat.In terms of applications, both of these components can be used for a variety of purposes. Potnetiometers are often used as a voltage regulator in power supplies. This means that the voltage supplied to a device can be accurately controlled by adjusting the potnetiometer.Rheostats, on the other hand, can be used to control the speed of a motor or the resistance of a light source. This is often done by connecting the variable resistor to the control input of the motor or light source and adjusting the resistance to achieve the desired speed or resistance.In summary, a potnetiometer and a rheostat are two very different electrical components that have distinct working principles. Potnetiometers offer a linear resistance, while rheostats offer a non-linear resistance. Both components can be used in a variety of applications and can be used to control the speed of a motor or the resistance of a light source.

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