Electrical Machines If the full load speed of 3-phase, 50Hz induction motor is 950 rpm, what is its half load speed nearly equals to? 940 rpm 975 rpm 1000 rpm 950 rpm 940 rpm 975 rpm 1000 rpm 950 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ward-Leonard control is basically a ___________ control method. Field control. Field diverter control. Armature resistance control. Armature voltage control. Field control. Field diverter control. Armature resistance control. Armature voltage control. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following DC motors will have percentage increase of input current for the same percentage increase in torque? Shunt. Differntical compound. Cummulative compound. Series. Shunt. Differntical compound. Cummulative compound. Series. 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 low starting torque. high efficiency. reduced size. quick acceleration. low starting torque. high efficiency. reduced size. quick acceleration. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two 3-phase AC generators are such that one has twice the linear dimensions of the other. The field windings of each are excited to give identical sinusoidal air-gap flux density waveform. Both have the same number of stator slots and identical winding patterns. The conductor/slot in a big generator is K times that of the smaller one. The value of K to get equal no load voltage at same frequency is 1/4. 8. 1/2. 4. 1/4. 8. 1/2. 4. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Stability of a synchronous motor ---------- with the increase in excitation. remains unaffected increases any of the above decreases remains unaffected increases any of the above decreases ANSWER DOWNLOAD EXAMIANS APP
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