Electrical Machines The speed of a DC series motor is Proportional to field current. Proportional to the square of the armature current. Proportional to the armature current. Inversely proportional to the armature current. Proportional to field current. Proportional to the square of the armature current. Proportional to the armature current. Inversely proportional to the armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous machine has P number of poles, find the relation between electrical angular momentum (ωe) and mechanical angular momentum (ωm)? ωe = P/2*ωm ωe = 2/P*ωm ωe = P*ωm ωe = ωm ωe = P/2*ωm ωe = 2/P*ωm ωe = P*ωm ωe = ωm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor is more expensive for same KW output rating ? DC Shunt Motor Induction motor. AC single phase motor. Synchronous motor. DC Shunt Motor Induction motor. AC single phase motor. Synchronous motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Field weakening control method is used for the _________ ? below rated speed None of these above rated speed both A and B below rated speed None of these above rated speed both A and B ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The material used for commutator brushes is mostly copper. mica. cast iron. carbon. copper. mica. cast iron. carbon. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Compensating winding are used to rectify the flux density waveform at region under main pole. None of these throughout the air gap. interpole region. region under main pole. None of these throughout the air gap. interpole region. ANSWER DOWNLOAD EXAMIANS APP
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