Electrical Machines What is power factor of a 3 - φ induction motor at no load? Same as full load. Low. Equal to 1. High. Same as full load. Low. Equal to 1. High. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines With the increases in field excitation of a DC generator, its generated emf decreases. increases upto a limit and then remains almost constant. increases. remains constant. decreases. increases upto a limit and then remains almost constant. increases. remains constant. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In field flux method speed control of DC Motor is constant power drive above base speed. constant torque drive above the base speed. constant hp drive below the base speed. constant torque drive below the base speed. constant power drive above base speed. constant torque drive above the base speed. constant hp drive below the base speed. constant torque drive below the base speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Induction motors have the advantage of all of below. less maintenance. simple in construction. less cost. all of below. less maintenance. simple in construction. less cost. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Flashing the field of DC generator means increasing flux density by adding extra turns of winding. making the magnetic losses forces parallel. creating residual magnetism by a DC source. neutralising residual magnetism. increasing flux density by adding extra turns of winding. making the magnetic losses forces parallel. creating residual magnetism by a DC source. neutralising residual magnetism. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The magnetic circuit of a dc shunt generator with negligible armature resistance and brush contact voltage drop remains unsaturated when it delivers full-load current at rated terminal voltage. The brushes are kept in the interpolar axis and speed is maintained constant. When the load is switched off, the terminal voltage would decrease increase become zero remain the same decrease increase become zero remain the same ANSWER DOWNLOAD EXAMIANS APP
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