Electrical Machines In DC machines internal characteristics are plotted between Vt vs load current Eg vs Ia Eg vs load current Vt vs Ia Vt vs load current Eg vs Ia Eg vs load current Vt vs Ia ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer the magnetic coupling between the primary and secondary winding can be increased by using the magnetic core of low reluctance. using soft material for winding. using transformer oil of better quality. increasing the number of turns. using the magnetic core of low reluctance. using soft material for winding. using transformer oil of better quality. increasing the number of turns. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To get the speed of DC motor more than normal without wastage of electrical energy _____________ is used. any of above method. Ward Leonard control. rheostatic control. none of above. any of above method. Ward Leonard control. rheostatic control. none of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements regarding the speed control of dc motors : 1. ward-leonard method is suitable forconstant-torque drives 2. Ward-leonard method is suitable for constant-power drives 3. field-control method facilitates speed control below base speed 4. Armature-resistance control method is more efficient than ward-leanard method 5. Field-control method is suitable for constant-torque drives 6. Armature-resistance control method is suitable for constant-torque drives From these, the correct answer is 1, 4, 6 1, 2, 6 1, 2, 5 1, 3, 5 1, 4, 6 1, 2, 6 1, 2, 5 1, 3, 5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor is expensive for same Kw output rates? AC single phase motor. Synchronous motor. DC Shunt Motor Induction motor. AC single phase motor. Synchronous motor. DC Shunt Motor Induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Fifth harmonic component of the induced voltage in three phase AC generator can be eliminated by using a winding pitch of 6 / 7. 2 / 3. 5 / 6. 4 / 5. 6 / 7. 2 / 3. 5 / 6. 4 / 5. ANSWER DOWNLOAD EXAMIANS APP
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