Electrical Machines In DC generators, the brushes remain in contact with conductors which lie in the inter polar gaps. there is no hard and fast rule for this. lie under north pole. lie under south pole. lie in the inter polar gaps. there is no hard and fast rule for this. lie under north pole. lie under south pole. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction effect is more in which of the following methods? field weakening method armature resistance control None of these same in both methods field weakening method armature resistance control None of these same in both methods ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The low voltage winding of a 400/230 V single phase 50 Hz transformer is to be connected to keep the magnetization current at the same level in both the cases the voltage at 25 Hz should be 115 V 460 V 65 V 230 V 115 V 460 V 65 V 230 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the mechanical angle α between the stator and rotor poles increases, then the stator current Remains unchanged. None of above. Decreases. Increases. Remains unchanged. None of above. Decreases. Increases. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 500 V, 120 KW, 50 Hz, star connected synchronous motor operating at 0.8 power factor leading has full load efficiency of 91%. The armature resistance is equal to 0.08Ω. The magnitude of armature current is nearly equal to 190 A. 127 A. 173 A. 240 A. 190 A. 127 A. 173 A. 240 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For standing a DC motor a starter is required because it limits the starting current to a safe value. It starts the motor. None of these it limits the speed of the motor. it limits the starting current to a safe value. It starts the motor. None of these it limits the speed of the motor. ANSWER DOWNLOAD EXAMIANS APP
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