Question

The measured value of a resistance is 20.25 Ω, whereas its true value is 20 Ω. Determine the absolute error.
1. 1.0 Ω
2. 0.5 Ω
3. 5.0 Ω
4. 0.25 Ω

Answer 1

Correct Answer - Option 4 : 0.25 Ω

Concept:

Error: The deviation of the measured value from the true value (or) actual value is called error.

Error (E) = Am – At

Am = Measured value

At = True value

Absolute error = |Am – At|

Calculation:

Measured value = 20.25 Ω

True value = 20 Ω

Absolute error = |20.25 – 20| = 0.25 Ω