Electrical Machines A 230 volt dc motor has an armature winding resistance of 0.5 ohm. Calculate the emf induced by the motor if the full load armature current is 23 ampere. 220.4 volt. None of these. 120 volt. 218.5 volt. 220.4 volt. None of these. 120 volt. 218.5 volt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Short circuiting is caused in the armature winding due to grounding of two or more turns of the same coil. failure of insulation between two turns of coil. failure of insulation between two commutator bars. any of above. grounding of two or more turns of the same coil. failure of insulation between two turns of coil. failure of insulation between two commutator bars. any of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under which of the following conditions hunting of synchronous motor is likely to occur ? Small and constant load. Periodic variation of load. Over-excitation. Over-loading for long period. Small and constant load. Periodic variation of load. Over-excitation. Over-loading for long period. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The output power of a dc motor is given by EIa. none of these. EbIa. EbIa2. EIa. none of these. EbIa. EbIa2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generator, armature reaction refers to what? Effect of armature flux on the main field flux. None of these Effect of field flux on the armature flux. Effect of armature flux on the load. Effect of armature flux on the main field flux. None of these Effect of field flux on the armature flux. Effect of armature flux on the load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine, which of these parameters remain the same whether it runs as a DC motor or a DC generator? Can not be determined. Induced emf. Mechanical power. Armature current. Can not be determined. Induced emf. Mechanical power. Armature current. ANSWER DOWNLOAD EXAMIANS APP
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