On an analog wattmeter, what part of the scale is most accurate and how much does that accuracy extend to the rest of the reading scale?

Question

Accepted Answer

The accuracy is only at full scale , and that absolute number reading is carried through to the rest of the range.  The upper 1 / 3 of the meter is the only truly calibrated part.

Answer

The accuracy is constant throughout the entire range of the meter.

Answer

The accuracy is only there at the upper 5% of the meter, and is not carried through at any other reading.

Answer

The accuracy cannot be determined at any reading.

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