Hysteresis in instrumentation is defined as...

Hysteresis in instrumentation is defined as...

• A. Input ascending and descending
• B. Slow response to changes
• C. Random noise
• D. Complete linearity

Answer: (A)

Hysteresis means the instrument’s output depends on the history of the input, not just its current value. When you increase the input and then decrease it, the output follows a different path, forming a loop rather than retracing the same line. This path-dependent behavior is why the description of input ascending and descending best captures hysteresis. Slow response is just lag, random noise is unrelated fluctuations, and complete linearity would not include any memory or loop behavior.

Hysteresis means the instrument’s output depends on the history of the input, not just its current value. When you increase the input and then decrease it, the output follows a different path, forming a loop rather than retracing the same line. This path-dependent behavior is why the description of input ascending and descending best captures hysteresis. Slow response is just lag, random noise is unrelated fluctuations, and complete linearity would not include any memory or loop behavior.