voltage of a dc machine is a   function of its magneto-motive force.

Related MCQs

• A 6-pole lap wound DC generator has a developed power of P watts and brush voltage of E volts. Three adjacent brushes of the machine had been found worn out and got open circuited. If the machine is operated with the remaining brushes, voltage and power that could be obtained from the machine are                    
• The flux and the internally generated voltage of a dc machine is a                   function of its magneto-motive force.
• In the rotor voltage injection method, when an external voltage source is in phase with the main voltage then speed will                        
• In the rotor voltage injection method, when an external voltage source is in opposite phase with the main voltage then speed will
• For a dc machine, its commutator has a diameter of 50 c rotating at 1000 rpm. For a brush width of 1 cm, the time commutation taken by the machine will be  
• For a dc machine, its commutator has a diameter of 50 c rotating at 1000 rpm. For a brush width of 1 cm, the time commutation taken by the machine will be                    
• an external voltage source is in phase with the main voltage then speed will  
• with compensating winding has a field current of 5 A to produce a voltage of 250 V at 1200 rpm. What will be the shunt field current of this machine at no load?
• with the remaining brushes, voltage and power that could be obtained from the machine are  
• For a 100 hp 250 V, compound dc motor with compensating winding has a field current of 5 A to produce a voltage of 250 V at 1200 rpm. What will be the shunt field current of this machine at no load?