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A wattmeter consists of a current coil and a potential coil.

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A wattmeter consists of a current coil and a potential coil.

(a) True

(b) False

I had been asked this question by my college professor while I was bunking the class.

This interesting question is from Dynamometer Type Wattmeter in chapter Measurement of Power and Related Parameters of Electrical Measurements

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The correct answer is (a) True

The explanation: Power in single phase A.C. circuits are measured by making use of a wattmeter. It consists of a current coil (cc) and a potential coil (pc).  Current coil is connected with the load while the potential coil is connected across the supply.

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