How does a wattmeter work?
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Wattmeters are of two types given below: Dynamometer Type Wattmeter. Induction type Wattmeter. Electro-dynamometer /Dynamometer Type Wattmeter Working Principle. Dynamometer Type Wattmeters are moving coil instruments and their operating field is produced in by another fixed coil.
The working of induction type wattmeter is based on the principle of electromagnetic induction. ... When the wattmeter is connected in an AC circuit, a current flows through the coil of the shunt magnet that is proportional to the supply voltage and the series magnet carries the load current.
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