Electrical Machines
The use of higher flux density in the transformer design

 reduces the weigh per KVA
None of these
 increases the weigh per KVA
 has no relation with the weight of transformer

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Electrical Machines
Short circuit test is performed on a transformer with a certain impressed voltage at rated frequency. If the short circuit test is now performed with the same magnitude of impressed voltage, but at frequency higher than the rated frequency then

 The magnitude will both increase.
 The magnitude of circuit as well as the power factor will decrease.
 The magnetude of current will increase, but power factor will decrease.
 The magnitude of current will decrease but the power factor will increase.

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Electrical Machines
The synchronous reactance( Xs) is the

 reactance either due to armature reaction or leakage flux
 reactance due to leakage flux
 combined reactance due to armature reaction and leakage flux
 reactance due to armature reaction of the machine

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