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For accurate measurement of low DC voltage, which device should be used?

For accurate measurement of low DC voltage, which device should be used? Correct Answer DC potentiometer

The correct answer is 'option 3'

Concept:

  • DC potentiometer is used for accurate measurement of low DC voltage because the result obtained does not depend upon the actual deflection of a pointer.
  • A potentiometer is an instrument designed to measure an unknown voltage by comparing it with a known voltage.
  • Measurement using the comparison method is capable of a high degree of accuracy.
  • A potentiometer is extensively used for the calibration of voltmeters and ammeters.

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