# Answer to Question #97561 in Electrical Engineering for Ojugbele Daniel

Question #97561
A voltmeter reads 128.8V when connected across the component if the true value if the voltage is 112.6V calculate
(i) static error
(ii) static correction for the voltmeter
(iii) Relative error.
1
2019-11-01T06:02:23-0400

(i) The static error is just a difference between a true value (which is technically impossible to know for sure, but possible to measure) and the measured value:

"\\Delta_V=V_M-V_T=128.8-112.6=16.2\\text{ V}."

(ii) Since the readings are 16.2 V higher than the true value, the static correction should be 16.2 V (the correction screw on the voltmeter should be set so that at 112.6 V of true voltage the readings would be as close as possible to 112.6 V).

(iii) The relative error is the static error over the true value:

"\\epsilon_V=\\frac{\\Delta_V}{V_T}\\cdot100\\%=\\frac{16.2}{112.6}\\cdot100\\%=14.4\\%."

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