Electrical Machines In dc machines, the space distribution of air-gap flux density wave at no load is flat-topped co- sinusoidal sinusoidal rectangular flat-topped co- sinusoidal sinusoidal rectangular ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When two DC series motors are connected in parallel, the resultant speed is zero. more than normal speed. less than normal speed. normal speed. zero. more than normal speed. less than normal speed. normal speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Essential conditions for two DC generators are connecting for parallel operation is/are rating of generators should be same. terminal voltage should be same. polarities should be same. both A and B. rating of generators should be same. terminal voltage should be same. polarities should be same. both A and B. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a DC Motor for constant load torque, what will happen to the armature current if armature resistance increases? Remain unchanged None of above. Increases. Decreases. Remain unchanged None of above. Increases. Decreases. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the source voltage of a DC motor is increased, which of the following will decrease? Full load current. Starting torque. Operating speed. Starting torque, operating speed, full load current. Full load current. Starting torque. Operating speed. Starting torque, operating speed, full load current. ANSWER DOWNLOAD EXAMIANS APP
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 south pole. lie under north pole. lie in the inter polar gaps. there is no hard and fast rule for this. lie under south pole. lie under north pole. ANSWER DOWNLOAD EXAMIANS APP
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