Electrical Machines
If an additional resistance is connected in series with a DC series motor operating at rated speed, the speed of the motor will

 Increase.
 Remain unaltered.
 Reduce.
 Oscillate around the normal speed.

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Electrical Machines
Where the shunt generators are widely used?

 Where often load fluctuation is occurred.
 Where the load is very high.
  Where a constant voltage is required over a narrow load range.
 Where voltage variation is needed over a wide load range.

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