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Q#1 Transformers GATE EE 2014 MCQ +2 marks -0.66 marks

An open circuit test is performed on 50Hz transformer, using variable frequency source and keeping V/f ratio constant, to separate its eddy current and hysteresis losses. The variation of core loss/frequency as function of frequency is shown in the figure The hysteresis and eddy current losses of the transformer at 25Hz respectively are

250W and 2.5W

250W and 62.5W

312.5 and 62.5W

312.5W and 250W

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