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Wattmeter reading is not affected by temperature.

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Wattmeter reading is not affected by temperature.

(a) True

(b) False

This question was posed to me in an online quiz.

I'm obligated to ask this question of Errors in Dynamometer Wattmeter in chapter Measurement of Power and Related Parameters of Electrical Measurements

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The correct answer is (b) False

The best I can explain: Wattmeter reading is affected by change in temperature. Resistance of the pressure coil and the spring stiffness are affected by the changes in temperature. Effects caused by these two effects oppose each other and neutralize.

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