Electrical Machines Brushes are always placed on--------------- , in order to achieve sparkles commutation? None of these MNA either GNA or MNA GNA None of these MNA either GNA or MNA GNA ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If Ke is eddy current constant, Kf is form factor, f is supply frequency, Bm maximum flux density in core of transformer, the expression of eddy current loss in transformer, is given by Kef2Kf2Bm. Kef2Kf2Bm2. KefKf2Bm2. Kef2KfBm2. Kef2Kf2Bm. Kef2Kf2Bm2. KefKf2Bm2. Kef2KfBm2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two of supply terminals to a 3 - Φ induction motor get interchanged during re-connection after normal maintenance. When switched on the supply, the motor will not start at all. rotate in direction opposite to that before maintenance. rotate in the same direction as before maintenance. get heated and damaged. not start at all. rotate in direction opposite to that before maintenance. rotate in the same direction as before maintenance. get heated and damaged. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The results of a slip test for determining direct axis (Xd) and quadrature axis (Xq) reactances of a star connected salient pole alternator are given below Phase values: Vmax = 108 V ; Vmin = 96 V Imax = 12 A ; Imin = 10 A Hence the two reactances will be Xd = 9.6Ω and Xq = 9Ω Xd = 10.8Ω and Xq = 8Ω Xd = 9Ω and Xq = 9.6Ω Xd = 8Ω and Xq = 10.8Ω Xd = 9.6Ω and Xq = 9Ω Xd = 10.8Ω and Xq = 8Ω Xd = 9Ω and Xq = 9.6Ω Xd = 8Ω and Xq = 10.8Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A motor operates in stable region at which of the following slip? low slip region both 1 and 2 unity slip high slip region low slip region both 1 and 2 unity slip high slip region ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an auto-transformer, power is transferred through None of these induction process only. conduction process only. both A and B. None of these induction process only. conduction process only. both A and B. ANSWER DOWNLOAD EXAMIANS APP
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