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 winding was wrongly connected field system lost residual magnetism there was a break in the armature circuit field resistance was higher than critical resistance field winding was wrongly connected field system lost residual magnetism there was a break in the armature circuit field resistance was higher than critical resistance ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Field divertor method of speed control of a DC series motor gives speed above rated one due to reduction of None of above. Line current. Armature current. Field current. None of above. Line current. Armature current. Field current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A series motor is efficiently suitable for constant speed operation. low starting torque operation. high starting torque operation. none of these. constant speed operation. low starting torque operation. high starting torque operation. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines At the instant of starting, the per unit slip of 3 - Φ induction motor is 1.0. 0.1. 0.5. 0.05. 1.0. 0.1. 0.5. 0.05. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V, DC shunt motor is operating at a speed of 1440 rpm. The armature resistance is 1.0 Ω and armature current is 10 A. of the excitation of the machine is reduced by 10%, the extra resistance to be put in the armature circuit to maintain the same speed and torque will be 1.79 Ω 3.1 Ω 1.8 9 Ω 2 .1 Ω 1.79 Ω 3.1 Ω 1.8 9 Ω 2 .1 Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In above question, find rms line voltage for delta connection? 399 V. 230.2 V. 50 V. 100 V. 399 V. 230.2 V. 50 V. 100 V. ANSWER DOWNLOAD EXAMIANS APP