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State various types of errors in wattmeter.

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Types of Error in wattmeter: 1. Errors due to method of connection. 2. Error due to pressure coil inductance. 3. Error due to pressure coil Capacitance. 4. Error due to mutual inductance effect. 5. Error due to stray magnetic fields. 6. Error due to eddy currents. 7. Temperature error. 8. Error due to vibration of moving system.

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