Electrical Machines A commutator in dc machine provide ----------------- rectification? half wave controlled full wave full wave controlled half wave half wave controlled full wave full wave controlled half wave ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V DC generator is run at full speed without any excitation. The open circuit voltage will be about 50 V. zero. 220 V. about 2 V. about 50 V. zero. 220 V. about 2 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Short circuiting is caused in the armature winding due to any of above. failure of insulation between two commutator bars. grounding of two or more turns of the same coil. failure of insulation between two turns of coil. any of above. failure of insulation between two commutator bars. grounding of two or more turns of the same coil. failure of insulation between two turns of coil. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of a cumulatively compound DC motor can be controlled by varying Armature resistance control. Shunt field resistance control. Any of above. Armature voltage control. Armature resistance control. Shunt field resistance control. Any of above. Armature voltage control. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machine torque depends on which of the following? flux (φ) both A and B speed armature current (I) flux (φ) both A and B speed armature current (I) ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines It is advisable to start a DC series motor with some load to Limit the current. Avoid sparking. Limit the flux. Limit the speed. Limit the current. Avoid sparking. Limit the flux. Limit the speed. ANSWER DOWNLOAD EXAMIANS APP
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