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 2.56 %. 3.76%. 2.57 %. 4.76%. 2.56 %. 3.76%. 2.57 %. 4.76%. 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? Cummulative compound. Differntical compound. Shunt. Series. Cummulative compound. Differntical compound. Shunt. Series. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum power developed depends on both 1and 2 reactance load angle voltage both 1and 2 reactance load angle voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 240 V DC series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 ohms. The value of resistance which must be added to obtain rated torque at 1000 rpm is 5.7 ohms. 1.9 ohms. 2.2 ohms. 6 ohms. 5.7 ohms. 1.9 ohms. 2.2 ohms. 6 ohms. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Mechanical energy is supplied to DC generator at the rate of 4200 J / s. The generator delivers 32.2 Amp at 120 V. What is the percentage efficiency of the generator? 212 V. 205 V. 201.02 V. 210 V. 212 V. 205 V. 201.02 V. 210 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt generator, when commissioned after a major repair of the field system, failed to build Up voltage. It was because field system lost residual magnetism field resistance was higher than critical resistance field winding was wrongly connected there was a break in the armature circuit field system lost residual magnetism field resistance was higher than critical resistance field winding was wrongly connected there was a break in the armature circuit ANSWER DOWNLOAD EXAMIANS APP
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