Explain the concept of hysteresis in sensors and give an example scenario where it degrades measurement.

• A. Hysteresis is dependency of output on the previous input path; e.g., a temperature sensor shows different readings when heating vs cooling due to material lag.
• B. Hysteresis is when input increases and output lags by a fixed amount.
• C. Hysteresis is a measure of accuracy only.
• D. Hysteresis is noise in signal.

Answer: (A)