Electrical Machines In a transformer operating at constant voltage if the input frequency increases, the core loss decrease. None of these remains constant. increase. decrease. None of these remains constant. increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature voltage control is considered suitable for a DC motor driven at constant speed. torque. power. current. speed. torque. power. current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which type of motors are preferred in lifts? DC series motors. None of these DC compound motors. DC shunt motors. DC series motors. None of these DC compound motors. DC shunt motors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machines, the space waveform of the air-gap flux distribution affects neither the voltage nor the torque voltage but not the torque torque but not the voltage both the torque and voltage neither the voltage nor the torque voltage but not the torque torque but not the voltage both the torque and voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum allowable tan - delta (tanδ) of dielectric dispassion factor of power transformer insulating oil is generally taken as 0.5 at 90°C. 3 at 90°C. 1 at 90°C. 2 at 90°C. 0.5 at 90°C. 3 at 90°C. 1 at 90°C. 2 at 90°C. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a single phase induction motor driving a fan load, the reason for having a high resistance rotor is to achieve high efficiency. quick acceleration. reduced size. low starting torque. high efficiency. quick acceleration. reduced size. low starting torque. ANSWER DOWNLOAD EXAMIANS APP
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