Electrical Machines If the applied voltage to a dc machine is 230 V, then the back emf, for maximum power developed, is 115 V 460 V 230 V 200 V 115 V 460 V 230 V 200 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ward Leonard control provides speed control below rated speed. in one direction only. above rated speed. in both direction. below rated speed. in one direction only. above rated speed. in both direction. 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. any of above. failure of insulation between two commutator bars. failure of insulation between two turns of coil. grounding of two or more turns of the same coil. any of above. failure of insulation between two commutator bars. failure of insulation between two turns of coil. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a step down transformer which one of the following statements is true? Secondary power is less than primary power. Number of secondary turns is less than primary turns. Secondary current is less than primary current. Number of secondary turns is more than that of primary. Secondary power is less than primary power. Number of secondary turns is less than primary turns. Secondary current is less than primary current. Number of secondary turns is more than that of primary. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines There are two 2-pole DC machines. Main field axis of machine A is horizontal and that of B is vertical. It is preferable to purchase none of these machine B machine A any of the two machines none of these machine B machine A any of the two machines ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a standard frequency the machine operates at a particular speed known as any of the above. synchronous speed. slip speed. normal speed. any of the above. synchronous speed. slip speed. normal speed. ANSWER DOWNLOAD EXAMIANS APP
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