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What is a potentiometer and what is it used for?
The potentiometer is also called as pots and it one of the most commonly used devise for measuring the displacement of the body. The potentiometer is the electrical type of transducer or sensor and it is of resistive type because it works on the principle of change of resistance of the wire with its length.
Why is potentiometer preferred over voltmeter?
A potentiometer is preferred over a voltmeter due to the following reasons: 1. Potentiometer is a very sensitive instrument and measures emf of a cell very precisely. 2. Potentiometer measures actual emf of a cell while voltmeter measures terminal potential difference of a cell.
How to use a potentiometer?
Potentiometers can be used as voltage dividers. To use the potentiometer as a voltage divider, all the three pins are connected. One of the outer pins is connected to the GND, the other to Vcc and the middle pin is the voltage output. When the potentiometer is used as a voltage divider, the wiper position determines the output voltage.
How does a potentiometer work in a circuit?
Potentiometers are in wide use in circuits for a variety of uses, but their main fuction remains the same: to increase or decrease the gain of a signal in a circuit. When the resistance of the potentiometer is decreased, the gain of the signal increases. When the resistance is increased, the gain of the signal decreases.
What is the purpose of a potentiometer?
A trimpot or trimmer potentiometer is a small potentiometer which is used for adjustment, tuning and calibration in circuits. When they are used as a variable resistance (wired as a rheostat) they are called preset resistors.
What is the principle of a potentiometer?
The principle of a potentiometer is that the potential dropped across a segment of a wire of uniform cross-section carrying a constant current is directly proportional to its length.
What are the parts of potentiometer?
Digital Potentiometers Digital Potentiometer Circuit. The circuit of a digital potentiometer consists of two parts, first the resistive element along with electronic switches and second the control circuit of the wiper. Advantages of Digital Potentiometers Disadvantages of Digital Potentiometers. Not suitable for high temperature environment and high power application.