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Q#1 Electro-mechanical Instruments GATE EE 2003 MCQ +2 marks -0.66 marks

The voltage flux adjustment of a certain 1-phase 220 V induction watt hour meter is altered so that the phase angle between the applied voltage and the flux due to it is 85° (instead of 90°). The errors introduced in the reading of this meter when the current is 5A at power factors of unity and 0.5 lagging are respectively.

3.8mW, 77.4mW    

3.8mW, 77.4Mw

4.2 W, 85.1 W    

4.2 W, 85.1 W

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