Electrical Machines
A dc shunt motor runs at a no-load speed of 1140 rpm. At full load, armature reaction weakens the main flux by 5% whereas the armature circuit voltage drops by 10%. The motor full-load speed in rpm is

 1203
 1000
 1200
 1080

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Electrical Machines
For an ideal transformer the winding should have

 maximum resistance on primary side and least resistance on secondary side
 minimum resistance on primary side and maximum resistance on secondary side
 equal resistance on primary and secondary side
 no ohmic resistance on either side

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