A transformer has a primary winding of 800 turns and a secondary winding of 200 turns. When the load current on the secondary is 80A at 0.8 power factor lagging, the primary current is 25A at 0.707 power factor lagging. Determine graphically or otherwise the no-load current of the transformer and its phase with respect to the voltage.
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The no load current will be 5.92 A.
The phase with respect to the voltage will be
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