Transformers
In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of

more than 15 A
less than 15 A
None of these
15 A

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Transformers
An ideal transformer is one which has

core of stainless steel and winding of pure copper metal
a common core for its primary and secondary windings
interleaved primary and secondary windings
no losses and magnetic leakage

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