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Ammeters and voltmeters are calibrated to read?

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in Basic Electrical Engineering by (88.7k points)
Ammeters and voltmeters are calibrated to read?

(a) RMS value

(b) Peak value

(c) Average value

(d) Instantaneous value

I got this question in my homework.

My question is from Phasor Diagrams Drawn with RMS Values Instead of Maximum Values topic in division Alternating Voltage and Current of Basic Electrical Engineering

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Right option is (a) RMS value

The best I can explain: Ammeters and voltmeters are calibrated to read the rms value because the rms value is the most accurate than average value.

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