Electrical Machines In DC machines shape of net flux density is? peaky in nature flat tapped or trapezoidal saddle shape sine wave peaky in nature flat tapped or trapezoidal saddle shape sine wave ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutator in DC generator is used for reduce losses convert AC armature current in to DC collecting of current increase efficiency reduce losses convert AC armature current in to DC collecting of current increase efficiency ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the speed of stator rotating magnetic field with respect to rotor rotating magnetic field? None of these Slip speed Zero Synchronous speed None of these Slip speed Zero Synchronous speed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generator, the electricity produced in armature is AC. None of these DC. armature is not present in DC generator. AC. None of these DC. armature is not present in DC generator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under which of the following conditions is a dc motor provided with compensating winding used ? 1. Wide range of speed control above normal 2. Wide range of steady load variation with no speed control 3.Wide range of rapid variation in load Select the correct answer using the codes given below : Codes : 1, 2 and 3 2 and 3 1 and 2 1 and 3 1, 2 and 3 2 and 3 1 and 2 1 and 3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC motors are stopped by opening line switches and not by forcing the handle of the motor starter back to OFF position. This is due to occurance of Heavy sparking at brushes. None of these. Both of above. Heavy sparking at the first stud of starting resistance steps. Heavy sparking at brushes. None of these. Both of above. Heavy sparking at the first stud of starting resistance steps. ANSWER DOWNLOAD EXAMIANS APP
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