Hello, friends, I hope you all are doing great. In today’s tutorial, we will discuss the Difference Between Potentiometer & Voltmeter. voltmeter and potentiometer both are used to find the value of voltage. a voltmeter is used to find the voltage at the endpoint of circuitry while a potentiometer is to find the electromotive force circuitry. The working operation of the potentiometer is based on the comparison in which the unknown voltage of the circuit at any point can be found by comparing the voltage of the source with that point. If both voltages have a similar value then it shows on the galvanometer.
The voltmeter is linked in a parallel combination to find the value of the voltage of the circuitry. In today’s post, we will have a detailed look at both potentiometer and voltmeter and compare them to find their differences. So let’s get started with the difference between a potentiometer and a voltmeter.
Difference Between Potentiometer & Voltmeter
Potentiometer
- It is resistance having 3 pinouts with rotating points that change the value resistance when employed in circuitry.
- Due to resistance change, it operates as a voltage divider.
- It operates like a rheostat when its two terminals are used in circuitry.
- It is used to measure the value of voltage and works as a voltage divider.
- The tape recorder uses this module to control the voice.
- The sensitivity of this device is larger than the voltmeter.
- It does not have a pointing needle like the voltmeter.
- Its working operation is like the position transducer same operation like to the joystick
- It is not used to regulate the power because it loses more power than another device
- Its structure is simple and consists of a resistance component sliding connection called a wiper.
- Its resistive part is created with carbon, graphite plastic
- Its named pots
- The brightness of the tv is regulated through this device
- It provides the exact measured value.
- The resistance value offered by this instrument is infinity.
Voltmeter
- The instrument used to find the value of voltage about two terminals of circuitry is called a voltmeter.
- The value of resistance offered by the voltmeter is larger than the ammeter.
- Its resistance value is larger than the ammeter.
- Its measuring range can be varied.
- Some meter gets power from an outer source and some have their own power source to operate.
- With a transformer, different voltmeters are used to show the value of volts at input and output.
- An Analog meter has a needle that indicates the voltage value that to is calculated.
- To measure the small value of voltage it is linked to amplifier circuitry.
- The digital meter indicates voltage in numbers
- The circuit about which voltage is measured voltmeter is connected in parallel combination.
- It is less accurate than the ammeter.
- For measuring the volt value from some volts to a thousand volts general-purpose voltmeter used
- The digital meter has a higher level of correctness normally one percent than other
Potentiometer Vs Voltmeter
Potentiometer
- A potentiometer is a 3-terminal device used to find the value of unknown EMF of supply through making comparsion with EMF.
- The potentiometer is called POT or Potmeter
- It is used for measuring the EMF of the power supply
- At the time of measuring the unknown EMF potentiometer not use any current from the supply of known EMF source.
- During measuring unknown EMF resistance of the potentiometer is infinite value.
- It is more accurate the voltmeter
- The potentiometer employs null deflection instruments.
- It does not provide direct reading but gives a thorough comparison of known value.
- The internal resistance of the source was measured with the use of a potentiometer.
- It is used for measuring the EMF of the power source cell, the internal resistance of the cell
Voltmeter
- A voltmeter is 2 terminal device that is used for measuring the potential difference between two terminals in the circuit.
- It is called a voltage meter device.
- There are 2 terminals in the voltmeter
- It is not a needed source of known EMF for voltmeters.
- The measuring voltage or potential difference voltmeter uses current from the power supply.
- At the time of measuring voltage resistance of mere is high.
- The voltmeter measures the quantity less accurately.
- It measures less accurate values.
- It is less sensitive.
- It used deflection-type instruments
- It provides the direct value of the voltage
- It is not used for measuring internal resistance of supply.
- It is used for measuring the potential difference between two points of a circuit.
Faqs
What is the main difference between a potentiometer and a voltmeter?
- A potentiometer and voltmeter are voltage-measuring devices. The basic difference between them is potentiometer measures the emF of the circuit and a voltmeter measures the end point voltage of the circuit.
Why is a voltmeter called a potentiometer?
- The potentiometer is best since a voltmeter uses some current through the circuit and a potentiometer needs no current for operation. The potentiometer operated on emf comparsion features.
What is the difference between a potentiometer and a meter bridge?
- The meter bridge is a device that helps measure unknown resistance values. A potentiometer is an electric device that is used for measuring the internal resistance and EMF of cells.
Why potentiometer is preferred over a voltmeter?
- A potentiometer is preferred then a voltmeter for measuring the EMF of a cell since it measures the real value of the emf of a cell. It uses a null process so not current flows through the galvanometer in cell in a balanced state of the potentiometer.
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That is a detailed post about the difference between a potentiometer and a voltmeter. If you have any query ask in the comments. Thanks for reading. Have a good day.