Electrical Machines In field flux method speed control of DC Motor is constant power drive above base speed. constant torque drive below the base speed. constant hp drive below the base speed. constant torque drive above the base speed. constant power drive above base speed. constant torque drive below the base speed. constant hp drive below the base speed. constant torque drive above the base speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the armature current of 5 Amp is flowing through the dc motor the torque produced is 47 Nm. Keeping the speed constant if the armature current is increased to 7 amp, calculate the new torque. Assume losses to be constant. 38.5 Nm. 74 Nm. 27.73 Nm . 65.8 Nm. 38.5 Nm. 74 Nm. 27.73 Nm . 65.8 Nm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Find the synchronous reactance of alternators in which a given field current of 200 A on short circuit and a generated emf of 50 V on open circuit. Armature resistance is 0.1 ohm 0.5Ω. 0.25Ω. 0.23Ω. 1Ω. 0.5Ω. 0.25Ω. 0.23Ω. 1Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A compound motor has tertiary winding. both shunt and series field winding. only series field winding. only shunt field winding. tertiary winding. both shunt and series field winding. only series field winding. only shunt field winding. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The material used for commutator brushes is mostly carbon. mica. copper. cast iron. carbon. mica. copper. cast iron. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The primary and secondary windings of a transformer are electrically linked. conductively linked. mechanically linked. inductively linked. electrically linked. conductively linked. mechanically linked. inductively linked. ANSWER DOWNLOAD EXAMIANS APP
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