Electrical Machines The 3 - Φ induction motor with rotor circuit open will make noise. run normally. get over heated. not run. make noise. run normally. get over heated. not run. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An ideal synchronous motor has no starting torque because relative velocity between stator and rotor mmf’s is not zero. relative velocity between the stator and rotor mmf’s is zero. rotor is made up of salient poles. rotor winding is highly reactive. relative velocity between stator and rotor mmf’s is not zero. relative velocity between the stator and rotor mmf’s is zero. rotor is made up of salient poles. rotor winding is highly reactive. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor has a rotor resistance of 0.002 Ω / phase. If the resistance is increased to 0.004 Ω / phase then the maximum torque will increase by 100% remain unaltered reduced to half increase by 200% increase by 100% remain unaltered reduced to half increase by 200% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generators, the cause of rapid brush wear may be imperfect contact. any of above. severe sparking. rough commutator surface. imperfect contact. any of above. severe sparking. rough commutator surface. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The shaft of induction motor should be hollow. flexible. any of these. stiff. hollow. flexible. any of these. stiff. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The synchronous motor can be started by any of the above methods. providing damper winding in its rotor circuit. coupling it with a small AC induction motor called the pony motor. coupling it with a DC compound motor. any of the above methods. providing damper winding in its rotor circuit. coupling it with a small AC induction motor called the pony motor. coupling it with a DC compound motor. ANSWER DOWNLOAD EXAMIANS APP
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