Electrical Machines In DC machine torque depends on which of the following? flux (φ) both A and B speed armature current (I) flux (φ) both A and B speed armature current (I) ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the speed of stator rotating magnetic field with respect to rotor rotating magnetic field? Synchronous speed None of these Slip speed Zero Synchronous speed None of these Slip speed Zero ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The fall in speed of the DC generator due to increase in load can be corrected by cooling the armature. increasing the excitation. increasing the input to the prime mover. reducing the load voltage. cooling the armature. increasing the excitation. increasing the input to the prime mover. reducing the load voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following DC Motor requires 3 point starter? Shunt motor. Shunt motor as well as compound motors. Shunt, compound and series motor. Series motor. Shunt motor. Shunt motor as well as compound motors. Shunt, compound and series motor. Series motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature coil is short circuited by brushes when it lies in none of above positions. along neutral axis. along field axis. in any of above positions. in none of above positions. along neutral axis. along field axis. in any of above positions. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Unbalanced supply voltage given to a 3 - φ, delta connected induction motor will cause all of these. less heating of the rotor. negative sequence current. less heating of the rotor. all of these. less heating of the rotor. negative sequence current. less heating of the rotor. ANSWER DOWNLOAD EXAMIANS APP
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