DC Motors
Dc series motors are used in those applications where _____ is required.

Low no load speed
None of the listed here
High starting torque
Constant speed

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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
Motor will run at very slow speed
This will make armature to take heavy current, possibly burning it
This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses

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