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MEO Class II – MET : 2015/NOV/09 – 2016/AUG/09

Question

Q9. A 250V DC shunt motor takes a line current of 6 Amps @ no load. the armature and field resistances are 0.1 Ohm and 125 Ohm respectively. Determine A. Rotation power loss B. Efficiency of motors when full load current is 150 Amps C. The percentage change of speed from no load to full load assuming the rotational losses to be constant.

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