Answer / shraddha

if ac supply accidently given to dc series motor, for first
half cycle it run but another negative half cycle it should
be run opposite direction but due to rotor inertia it will
not happend but there is opposite force excerted on rotor &
motor stop this process require fraction of second so it
look like its not running.so motor will not running.

Answer / satyaveni

nothing will be happen.with some modificatios the de motor
works as an ac motor

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