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Sensitivity of an instrument is

  • A.the smallest input change that produces a detectable output
  • B.how close its reading lies to the true value
  • C.the range of input over which it may be used
  • D.the ratio of the change in output to the change in input

Answer: D

A sensitive instrument gives a large deflection for a small input, which is a different property from being able to resolve a small change. The two are often confused because a sensitive instrument is usually well resolved.

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