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Measurements & InstrumentationMeasurement Errors

On a 100 V range with accuracy ±1% of full scale, a reading of 20 V may have a maximum percentage error relative to the reading of?

  • A1%
  • B2%
  • C5%
  • D20%
Report an error
Correct Answer: C. 5%
Explanation: Maximum absolute error remains 1 V; relative to a 20 V reading this is (1/20)×100=5%.
Reference: Standard measurements and instrumentation: measurement errors
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