Electrical Machines The current drawn by a 220 V DC series motor of armature resistance 0.5 Ω and back emf of 200 V is 40 A. 44 A. 400 A. 440 A. 40 A. 44 A. 400 A. 440 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutation in a DC machine may be explained as a process by which electric current in a coil is reversed. how alternate flux affects the main field flux. by virtue of which emf is induced in the armature conductors. in which magnetic field is set up. by which electric current in a coil is reversed. how alternate flux affects the main field flux. by virtue of which emf is induced in the armature conductors. in which magnetic field is set up. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When maximum starting torque is obtained, rotor power is ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 6 pole DC machine, 90 mechanical degrees correspond to which of the following electrical degree? 270. 180. 30. 45. 270. 180. 30. 45. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of induction motors the ratio of length to pole pitch for minimum cost, is taken as 3 to 5. 1.5 to 2. 2 to 3. 1.0. 3 to 5. 1.5 to 2. 2 to 3. 1.0. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is/are the advantages of carbon brush over the copper brush? In case of any sparking they will be less damaged than copper brushes They are self lubricating in nature They are not hard as copper brush All of these In case of any sparking they will be less damaged than copper brushes They are self lubricating in nature They are not hard as copper brush All of these ANSWER DOWNLOAD EXAMIANS APP
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