Electrical Machines In large sized DC machines the compensating windings are provided to neutralize voltage induced in coil due to fluctuation of l compensate for the decrease in speed due to increase of load. reduce eddy current losses by providing local short circuits. None of these neutralize voltage induced in coil due to fluctuation of l compensate for the decrease in speed due to increase of load. reduce eddy current losses by providing local short circuits. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The air gap between stator and the rotor of the 3 - φ induction motor is kept depends on the material of stator and the rotor. as wide as possible. as small as possible. air gap does not matter. depends on the material of stator and the rotor. as wide as possible. as small as possible. air gap does not matter. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Thin laminations are used in a machine in order to reduce Hysteresis losses Copper losses Eddy current losses Both 1 and 2 Hysteresis losses Copper losses Eddy current losses Both 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of conductor of a DC motor can be determined by Ampere law. Fleming's left hand rule. Lenz's law. Fleming's right hand rule. Ampere law. Fleming's left hand rule. Lenz's law. Fleming's right hand rule. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The current drawn by a 220 V DC series motor of armature resistance 0.5Ω and back back emf 200 V is 44 A. 440 A. 400 A. 40 A. 44 A. 440 A. 400 A. 40 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generators, the cause of rapid brush wear may be any of above. severe sparking. rough commutator surface. imperfect contact. any of above. severe sparking. rough commutator surface. imperfect contact. ANSWER DOWNLOAD EXAMIANS APP
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