Electrical Machines When maximum flux density is constant, the eddy current losses are proportional to f V V2 f2 f V V2 f2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the frequency of input voltage of a transformer is increased keeping the magnitude of voltage unchanged, then Pe will increase but Ph will decrease Ph will increase but Pe will decrease both hysteresis loss(Ph) and eddy current loss(Pe) will increase Ph will decrease but Pe will remain same Pe will increase but Ph will decrease Ph will increase but Pe will decrease both hysteresis loss(Ph) and eddy current loss(Pe) will increase Ph will decrease but Pe will remain same ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What happens if fifth multiples of harmonics is given to induction motor? It will rotates in normal operation. Either short circuit or open circuit occurs. Fail to start. It will rotates in reverse direction. It will rotates in normal operation. Either short circuit or open circuit occurs. Fail to start. It will rotates in reverse direction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an auto transformer, for what value of turn ratio, power transferred by inductively and conductively are same? 1 any of the above 0 0.5 1 any of the above 0 0.5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature of DC machine is made of silicon steel lamination to increase the permeability. reduce eddy current loss only. reduce hysteresis loss only. reduce both eddy current and hysteresis loss. increase the permeability. reduce eddy current loss only. reduce hysteresis loss only. reduce both eddy current and hysteresis loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer, hysteresis and eddy current losses depend upon both 2 and 3 maximum flux density load current supply frequency both 2 and 3 maximum flux density load current supply frequency ANSWER DOWNLOAD EXAMIANS APP
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