Distinguish between potentiometer and voltmeter?
Friday, February 24, 2023
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Question: Distinguish between potentiometer and voltmeter?
Potentiometer and voltmeter are two different types of measuring instruments used in electrical circuits. A potentiometer is a type of variable resistor that is used to measure the potential difference between two points in a circuit. It consists of a long resistive element with a sliding contact that can be moved along the element to vary the resistance. The potentiometer works by comparing the unknown voltage to a known voltage and adjusting the sliding contact until the potential difference across it is zero. This allows the voltage between the two points in the circuit to be determined by measuring the position of the sliding contact along the resistive element.
On the other hand, a voltmeter is a device used to measure the potential difference or voltage between two points in a circuit. It is connected in parallel to the circuit element or component whose voltage is to be measured. The voltmeter measures the voltage drop across the component by connecting two leads across the component in parallel. The voltmeter provides a numerical reading of the voltage between the two points in the circuit and is typically calibrated to measure a specific range of voltages.
In summary, the main difference between potentiometer and voltmeter is that a potentiometer measures the potential difference by comparing it to a known voltage and adjusting a variable resistor, while a voltmeter directly measures the potential difference between two points in a circuit using a parallel connection.
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