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Resolution and accuracy of a digital voltmeter differ in that resolution is

  • A.the closeness of a reading to the true value of the quantity
  • B.the number of readings the instrument can take in one second
  • C.the fraction of the range over which the instrument is guaranteed
  • D.the smallest change the instrument can show

Answer: D

An instrument may resolve a microvolt and yet be wrong by a millivolt. Resolution says how finely the reading is divided; accuracy says how far the reading may be from the truth, and it is always the coarser of the two.

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