Question

What is the ratio of the difference between measured value and true value to the true value of the measurand?

(a) transient

(b) relative error

(c) dead zone

(d) none of the mentioned

This question was addressed to me in examination.

The query is from Intake Air Flow Measurement in division Engine Electronics of IC Engine

Answer 1

The correct answer is:

(b) relative error

The relative error is the ratio of the difference between the measured value and the true value to the true value of the measurand. It is a measure of how accurate a measurement is relative to the true or accepted value and is often expressed as a percentage. 

The formula for relative error is:

\[

\text{Relative Error} = \frac{\text{Measured Value} - \text{True Value}}{\text{True Value}} \times 100

\]