Electrical Machines A dc shunt motor has external resistance Ra and Rf in the armature and field circuits respectively. Armature current at starting can be reduced by keeping Rf maximum and Ra minimum Ra maximum and Rf minimum Ra maximum and Rf maximum Ra minimum and Rf minimum Rf maximum and Ra minimum Ra maximum and Rf minimum Ra maximum and Rf maximum Ra minimum and Rf minimum ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The reduced air gap results in an increase power factor. starting torque. cost of operation. breaking torque. power factor. starting torque. cost of operation. breaking torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Cogging of induction motor occurs at low voltage and when stator and rotor poles are equal. high voltage and when stator and rotor poles are equal. low voltage and when stator and rotor poles are not equal. high voltage and when stator and rotor poles are not equal. low voltage and when stator and rotor poles are equal. high voltage and when stator and rotor poles are equal. low voltage and when stator and rotor poles are not equal. high voltage and when stator and rotor poles are not equal. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The synchronous motor can be started by coupling it with a DC compound motor. coupling it with a small AC induction motor called the pony motor. any of the above methods. providing damper winding in its rotor circuit. coupling it with a DC compound motor. coupling it with a small AC induction motor called the pony motor. any of the above methods. providing damper winding in its rotor circuit. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The working principle of transformer depends on Coulombs law. Faradays law of electromagnetic induction. Newtons law. Amperes law. Coulombs law. Faradays law of electromagnetic induction. Newtons law. Amperes law. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Field weakening method is also called as-----------? constant power control constant torque control constant voltage control constant current control constant power control constant torque control constant voltage control constant current control ANSWER DOWNLOAD EXAMIANS APP
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