Q.

The mechanical output available at the dc motor shaft is equal to

  • AElectrical power input to motor
  • BElectrical power input less iron and friction losses
  • CElectrical power input less copper losses
  • DElectrical power input less total losses (copper loss, iron loss, friction and windage losses) 
Correct Answer : (D)

Electrical power input less total losses (copper loss, iron loss, friction and windage losses) 

Hints :

The mechanical output available at the dc motor shaft is equal to Electrical power input less total losses (copper loss, iron loss, friction and windage losses) .

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