Electrical Machines Hopkinss test in DC motor is conducted at ? None of these. Full load. No load. Low load. None of these. Full load. No load. Low load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which DC motor will have least percentage increase of input current, for the same percentage increase in the torque Compound Wound DC Motor DC Series Motor Separately Excited DC Motor DC Shunt Motor Compound Wound DC Motor DC Series Motor Separately Excited DC Motor DC Shunt Motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of a motor falls from 1100 r.p.m at no-load to 1050 r.p.m at rated load. The speed regulation of motor is 3.76%. 2.56 %. 2.57 %. 4.76%. 3.76%. 2.56 %. 2.57 %. 4.76%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two transformers with identical rating, are designed with flux densities of 1.2 and 1.4 Wb / m2 respectively. The weight of first transformer per kVA is equal to that of second transformer. more than that of second transformer. none of these. less than that of second transformer. equal to that of second transformer. more than that of second transformer. none of these. less than that of second transformer. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Poles of DC machine are often laminated to reduce pulsation loss. dissipate more heat. reduce iron weight. reduce armature reaction. reduce pulsation loss. dissipate more heat. reduce iron weight. reduce armature reaction. 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. 5 / 6. 2 / 3. 4 / 5. 6 / 7. 5 / 6. 2 / 3. 4 / 5. ANSWER DOWNLOAD EXAMIANS APP
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