Electrical Machines The demagnetising component of armature reaction in a DC generator results in sparking trouble. increases armature speed. reduces inter poles flux density. reduces generator emf. results in sparking trouble. increases armature speed. reduces inter poles flux density. reduces generator emf. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The current drawn by the armature of DC motor is directly proportional to The voltage across the terminals. The speed of motor. None of above. The torque required. The voltage across the terminals. The speed of motor. None of above. The torque required. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The slip of an induction motor normally does not depend on which of the following? Shaft torque. Core loss component. Synchronous speed. Rotor speed. Shaft torque. Core loss component. Synchronous speed. Rotor speed. 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 220 V. about 2 V. zero. about 50 V. 220 V. about 2 V. zero. about 50 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutator in DC generator is used for increase efficiency collecting of current reduce losses convert AC armature current in to DC increase efficiency collecting of current reduce losses convert AC armature current in to DC ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a seperately excited DC Motor if field current is increased, it will Increase acceleration duration. Reduce armature heating. Increase speed Reduce starting torque. Increase acceleration duration. Reduce armature heating. Increase speed Reduce starting torque. ANSWER DOWNLOAD EXAMIANS APP
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