Electrical Machines In DC machine yoke offers both A and B mechanical protection to the machine flux path completion produce working flux both A and B mechanical protection to the machine flux path completion produce working flux ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer operating at constant voltage if the input frequency increases, the core loss increase. remains constant. None of these decrease. increase. remains constant. None of these decrease. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines How can the synchronous speed of a 3 - Φ IM be varied? By varying number of poles. By varying the supply frequency. By varying supply voltage. Both (A) and (B). By varying number of poles. By varying the supply frequency. By varying supply voltage. Both (A) and (B). ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In 3 - Φ induction motor some times copper bars are placed deep in the rotor to improve starting torque. improve efficiency. improve power factor. reduce copper loss. improve starting torque. improve efficiency. improve power factor. reduce copper loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the effect of armature reaction ? Both option B and C. Armature flux distorts the main field flux. Armature flux weakens the main field flux. None of the options. Both option B and C. Armature flux distorts the main field flux. Armature flux weakens the main field flux. None of the options. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Methods of synchronizing of alternator may be done by all dark lamp method. one dark two bright. all of these. all bright lamp method. all dark lamp method. one dark two bright. all of these. all bright lamp method. ANSWER DOWNLOAD EXAMIANS APP
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