Electrical Machines The output voltage of a DC generator is E = V + IaRa. E = V – IaRa. E = V + Ia. E = V + Ra. E = V + IaRa. E = V – IaRa. E = V + Ia. E = V + Ra. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 stack stepper motor has 12 teeth on stator as well as on rotor. Determine the step size when each stack excited? 10°. 45°. 24°. 30°. 10°. 45°. 24°. 30°. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole DC generator rotates at 1500 rpm. How many times in a second, will the emf induced in each armature conductor changes its direction? 750. 500. 100. 200. 750. 500. 100. 200. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The reduced air gap results in an increase breaking torque. starting torque. power factor. cost of operation. breaking torque. starting torque. power factor. cost of operation. 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. 2 at 90°C. 1 at 90°C. 0.5 at 90°C. 3 at 90°C. 2 at 90°C. 1 at 90°C. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The synchronous speed of an induction motor will be increased by speed can not be increased. decreasing of frequency. increasing of frequency. increasing number of poles. speed can not be increased. decreasing of frequency. increasing of frequency. increasing number of poles. ANSWER DOWNLOAD EXAMIANS APP
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