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The voltage applied to the H.V. side of a transformer during S.C. test is 2% of the rated voltage. The core loss

The voltage applied to the H.V. side of a transformer during S.C. test is 2% of the rated voltage. The core loss as the fraction of its rated core loss is (a) 4% (b) 0.4% (c) 0.25% (d) 0.04%
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