Electrical Machines For the purpose of starting an induction motor, star/delta switch is an equivalent to auto transformer of ratio 66.3% 50% 57.7% 33.3% 66.3% 50% 57.7% 33.3% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the armature electric current is increased to double its previous value, and the time of commutation is halved, how will the reactance voltage vary? It will be doubled. It will remain the same. It will becomes four times. It will be halved. It will be doubled. It will remain the same. It will becomes four times. It will be halved. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What type of connection is made in between the inter-pole and the field winding? Compound. None of the options. Parallel. Series. Compound. None of the options. Parallel. Series. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machine shape of armature MMF wave is? Saddle shape. Triangular and directed towards brush axis. Peaky in nature. Triangular and directed towards main pole. Saddle shape. Triangular and directed towards brush axis. Peaky in nature. Triangular and directed towards main pole. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole 50 Hz induction motor is running at 1470 rpm. The frequency of rotor current is 5 Hz 50 Hz 0 Hz 1 Hz 5 Hz 50 Hz 0 Hz 1 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines CRGO steel is used in the core of transformer to reduce hysteresis loss. both eddy current and hysteresis loss. ohmic loss. eddy current loss. hysteresis loss. both eddy current and hysteresis loss. ohmic loss. eddy current loss. ANSWER DOWNLOAD EXAMIANS APP