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Sensor drift describes

  • A.A difference between rising and falling readings
  • B.A slow change in output over time at a constant input
  • C.A fixed offset from the true value
  • D.Random noise on the output

Answer: B

Because it develops slowly, drift is not visible from a single reading and is found only by recalibration or by comparison with another sensor. It is the main reason calibration intervals exist at all. Nothing else reveals it.

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