Electrical Machines If the air gap of IM is increased, ____________ will increase. power factor. speed. magnetizing current. air gap flux. power factor. speed. magnetizing current. air gap flux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The magnetic field which initially induces emf in the armature in a self excited DC generator is because of armature reaction. permanent magnets. None of these residual magnetism. armature reaction. permanent magnets. None of these residual magnetism. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slip speed is the difference of synchronous speed and actual rotor speed. difference of actual rotor speed and synchronous speed. sum of synchronous and rotor speeds. half of the sum of synchronous and rotor speeds. difference of synchronous speed and actual rotor speed. difference of actual rotor speed and synchronous speed. sum of synchronous and rotor speeds. half of the sum of synchronous and rotor speeds. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Brushes are always placed on--------------- , in order to achieve sparkles commutation? MNA either GNA or MNA None of these GNA MNA either GNA or MNA None of these GNA ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole lap wound dc generator has 4 brushes, if one of the brush is damaged, what will be the change in V, I and P ratings V/2, I and P/2 V, I and P V/2, I/2 and P/4 V, I/2 and P/2 V/2, I and P/2 V, I and P V/2, I/2 and P/4 V, I/2 and P/2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the supply terminal of a DC shunt motor are interchanged The motor will stop. The motor will run at its normal speed in the same direction as before. The motor will run much faster in the same direction. The direction of rotation will reverse. The motor will stop. The motor will run at its normal speed in the same direction as before. The motor will run much faster in the same direction. The direction of rotation will reverse. ANSWER DOWNLOAD EXAMIANS APP
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