16A transformer cannot work on DC because:ADC is too highBDC does not produce a changing fluxCDC damages the core instantlyDDC has no voltageView AnswerDiscussWorkspaceReportSaveEasy
17The voltage regulation of a transformer is:AThe power factorBThe turns ratioCThe efficiencyDThe change in secondary voltage from no load to full load, as a percentageView AnswerDiscussWorkspaceReportSaveEasy
18A 10 kVA transformer has iron loss 100 W and full-load copper loss 400 W. Maximum efficiency occurs at what fraction of full load?ATwice full loadBQuarter loadCHalf loadDFull loadView AnswerDiscussWorkspaceReportSaveMedium