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A DC 220V shunt motor draws a no load current of 3.5A.Its armature and shunt resistances...

  1. A DC 220V shunt motor draws a no load current of 3.5A.Its armature and shunt resistances are: 0.25 and 440 ohms. At full load it draws a current of 65.5 A . Find the efficiency of machine at full load.

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