DC Motors
When the speed of dc motor increases, its armature current

Decreases
None of the listed here
Remains same
Increases

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DC Motors
If a D.C. shunt motor is working at no load and if shunt field circuit suddenly opens

Nothing will happen to the motor
This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses
This will make armature to take heavy current, possibly burning it
Motor will run at very slow speed

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