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Induction Motor Interview Questions with Answers | Part-1

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VOLTMETER

How Voltmeter Works?




Voltmeter
How Voltmeter works?


  • Voltmeter is a basic meter to use for measure a electric potential difference in volts.

  • There are generally two types of voltmeter 

                   1. Analog voltmeter
                   2. Digital Voltmeter


  • In analog voltmeter, pointer is used across calibrated scale. Pointer is move around the scale according to potential difference.

  • Analog voltmeter is not shows perfect calibration as compare to digital voltmeter.

  • In digital voltmeter, analog to digital converter is used, so first it's convert analog to digital and digits are shown on display.

  • Digital voltmeter is shows the perfect calibration as compare to analog voltmeter.

  • When voltage to be measure, voltmeter must be connected in parallel.

  • Voltmeter has high value of resistance, so if we connected it in series, then resistance make be high and work as a open circuit and no current can flow, so meter does not display measurement.

  • If we connected voltmeter in parallel, so it's resistance make be smaller nearby zero and it displays the voltage across the load. And also we know that voltage must be same in parallel.

  • There are many different types of voltmeter are available in market according to capacity and according to company.

  • Also according to supply, there two types of voltmeter is available, 
  • DC Voltmeter
  • AC Voltmeter 

Digital Voltmeter

The image of digital Voltmeter is shown below:


Digital Voltmeter
Digital Voltmeter

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