Electrical Machines In a transformer zero voltage regulation is achieved at a load power factor which is zero leading unity lagging zero leading unity lagging ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The material used for commutator brushes is mostly cast iron. copper. carbon. mica. cast iron. copper. carbon. mica. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the excitation is increased, the power factor is lagging power factor unity power factor leading power factor None of these lagging power factor unity power factor leading power factor None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For small value armature current Ia the torque developed by a DC series motor is proportional to Ia2. 1/Ia. √Ia. Ia. Ia2. 1/Ia. √Ia. Ia. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under operating conditions the rotor conductor should be _________________ in induction motor. semi closed or semi opened. always closed. always opened. none. semi closed or semi opened. always closed. always opened. none. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature resistance control method is used for the _______ ? above rated speed both 1 and 2 None of these below rated speed above rated speed both 1 and 2 None of these below rated speed ANSWER DOWNLOAD EXAMIANS APP
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