Question

A 0 - 10 A ammeter has a guaranted accuracy of 1.5% of full scale reading. The current measured by the instrument is 2.5 A. The percentage limiting error in the measurement is $\pm$ ________ %

• A. 0.6
• B. 6
• C. 1.5
• D. 3

Answer 1

The correct option is B 6

The magnitude of the limiting error of instrument is
$=\pm \frac{1.5}{100}\times 10=\pm 0.15A$

The value of current measured by the instrument$=2.5A$

$\%Limitingerror=\pm \frac{0.15}{2.5}\times 100=\pm 6\%$