Question

Smallest change which a sensor can detect is ...............

• A. Resolution
• B. Accuracy
• C. Precision
• D. Scale

Hint:

Think: Resolution = sensitivity to small changes. Accuracy = correctness. Precision = repeatability. Scale = range.

Answer 1

The Correct Option is A

Resolution refers to the smallest measurable change in the input signal that a sensor can detect or display. In other words, it determines the fineness or granularity with which the sensor or measurement system can detect changes.
For example, a temperature sensor with a resolution of 0.1°C can detect changes as small as 0.1°C.
Let’s differentiate this from the other options:
- Accuracy is the closeness of a measurement to the true value — it refers to correctness, not fineness.
- Precision refers to the consistency or repeatability of measurements — it doesn’t define how small a change can be detected.
- Scale refers to the range or span of the measurement system and not its sensitivity to small changes.
Therefore, the correct term for the smallest detectable change by a sensor is Resolution.