Electrical Machines Voltage regulation of transformer is given by (E2 - V2) / V2 (V2 - E2) / E2 (E2 - V2) / E2 (V2 - E2) / V2 (E2 - V2) / V2 (V2 - E2) / E2 (E2 - V2) / E2 (V2 - E2) / V2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines No load test of 3-phase induction motor gives which of the following? variable loss None of these constant loss both A and B variable loss None of these constant loss both A and B ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor has synchronous speed of 1500 rpm. What will be the slip when it is running at a speed of 1450 rpm? +3.33% -3.33% +3% -3% +3.33% -3.33% +3% -3% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous motor will deliver maximum power when load angle is equal to internal angle θ. load angle is 0°. load angle is 45°. input power factor is unity. load angle is equal to internal angle θ. load angle is 0°. load angle is 45°. input power factor is unity. 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. None of these residual magnetism. permanent magnets. armature reaction. None of these residual magnetism. permanent magnets. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 3-phase induction motor, if the supply voltage and frequency are reduced by the same ratio, then slip at which maximum torque occurs is more and maximum torque decreases less and maximum torque decreases less and maximum torque increases more and maximum torque remains constant more and maximum torque decreases less and maximum torque decreases less and maximum torque increases more and maximum torque remains constant ANSWER DOWNLOAD EXAMIANS APP
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