Electrical Machines
Find the developed torque DC Series Motor having armature resistance of 0.2 Ω and taking armature current of 60 A is connected to 250 V supply. Considered brush drop of 1 V each.

 266.20 N-m.
 234.76 N-m.
 cant be determined.
 133.22 N-m

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Electrical Machines
The residual magnetism of a self-excited dc generator is lost. To build up its emf again

 the field winding must be replaced
 the armature connection must be reversed
 the field winding connection must be reversed
 field winding must be excited by low voltage dc supply

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