The purpose of providing an iron core in a transformer is to
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Transformers
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A good voltage regulation of a transformer means
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If the percentage impedances of the two transformers working in parallel are different, then
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An ideal transformer will have maximum efficiency at a load such that
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A Buchholz relay can be installed on
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The full-load copper loss of a transformer is 1600 W. At half-load, the copper loss will be
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The size of a transformer core will depend on
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A transformer cannot raise or lower the voltage of a D.C. supply because
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Which of the following loss in a transformer is zero even at full load ?
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Part of the transformer which is most subject to damage from overheating is
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The no-load current drawn by transformer is usually what per cent of the full-load current?
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The chemical used in breather for transformer should have the quality of
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The function of conservator in a transformer is
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The function of breather in a transformer is
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Two transformers are connected in parallel. These transformers do not have equal percentage impedance. This is likely to result in
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The value of flux involved m the e.m.f. equation of a transformer is
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In a given transformer for given applied voltage, losses which remain constant irrespective of load changes are
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The changes in volume of transformer cooling oil due to variation of atmospheric tem-perature during day and night is taken care of by which part of transformer
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Star/star transformers work satisfactorily when
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Delta/star transformer works satisfactorily when
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