In the DC motor the iron losses occur in __________(a) Field(b) Rotor(c) Brushes(d) CommutatorI have been asked this question at a job interview.My doubt is from Efficiency of DC Machine- 2 topic in section Efficiency and Testing of DC Machines

In the DC motor the iron losses occur in __________(a) Field(b) Rotor(

1.	In the DC motor the iron losses occur in __________(a) Field(b) Rotor(c) Brushes(d) CommutatorI have been asked this question at a job interview.My doubt is from Efficiency of DC Machine- 2 topic in section Efficiency and Testing of DC Machines
Answer» The CORRECT option is (B) Rotor The explanation: Armature winding in a DC machine is located on rotor. IRON LOSSES OCCUR in an armature, hence in rotor. Iron losses are hysteresis loss and eddy current loss, which are seen prominently in armature rotor.

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