Recent questions tagged efficiency - GO Electrical

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GATE2013-9
A single-phase transformer has no-load loss of $64W$,as obtained from an open-circuit test.when a short-circuit test is performed on it with $90\%$ of the rated current flowing in its both $LV$ and $HV$ winding,the measured loss is $81W$.The transformer has maximum efficiency when ... $80.0\: \%$ of the rated current. $88.8 \:\%$ of the rated current.

asked Feb 12, 2017 in Electrical Machines by piyag476 (1.5k points)

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GATE2016-1-47
A $DC$ shunt generator delivers $45 A$ at a terminal voltage of $220 V$. The armature and the shunt field resistances are $0.01 \Omega$ and $44 \Omega$ respectively. The stray losses are $375 W$. The percentage efficiency of the $DC$ generator is _________.

asked Jan 30, 2017 in Electrical Machines by makhdoom ghaya (9.2k points)

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