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The resolution of a three and a half digit voltmeter is

  • A.one part in 4000
  • B.one part in 2000
  • C.one part in 1999
  • D.one part in 3500

Answer: B

Full scale corresponds to a count of 2000, so the smallest distinguishable step is a two-thousandth of the range, or 0.05 per cent. Resolution is a property of the display and the converter, and is quite separate from accuracy.

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