Q:
      
      
         
            
D.C Series motor never operated on 
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: C) No Load         
         
Explanation: D.C series motor both armature and feild connected in series at noload condition current drawn by the motor is zero Ia=0 flux also zero. but very small amount of flux avalible because of residual magnetism
 
in series motor speed  =  N α Eb/Φ Eb almost conistant
                                 =    N α 1/Φ
At no load condition d.c series can be run as dangerously very high so d.c series motor
operated at load condition only
       
      
      
      
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