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A wattmeter measures power consumption by using two coils - a current coil in series and a voltage coil in parallel. The current coil creates a magnetic field proportional to current, while voltage is dropped across the voltage coil. This causes the needle to deflect according to the product of current and voltage, measuring power in watts. For AC power, a wattmeter measures average power by accounting for the phase difference between current and voltage. Wattmeters are used to measure power consumption of

Author

PRAKASH S

Language

EN