The expected voltage value across an element is 50 V. However, a voltmeter reads it as 48 V. Calculate the percentage error in the measurement.
The expected voltage value across an element is 50 V. However, a voltmeter reads it as 48 V. Calculate the percentage error in the measurement.
Right Answer is:
4%
SOLUTION
Percentage error is given as
$\begin{array}{l} {\rm{\% }}E = \frac{{|{A_m} – {A_t}|}}{{{A_t}}} \times 100\\ = \frac{E}{{{A_t}}} \times 100 \end{array}$
Given,
Am = 48 V
At = 50 V
From above concept,
E = |48 – 50| = 2 V
% E = 2 × 100/50 = 4%