Electrical Machines The field divertor resistance for a DC series motor is of order of 50 Ω 0.1 Ω 100 Ω 10 Ω 50 Ω 0.1 Ω 100 Ω 10 Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Unbalanced supply voltage given to a 3 - φ, delta connected induction motor will cause negative sequence current. all of these. less heating of the rotor. less heating of the rotor. negative sequence current. all of these. less heating of the rotor. less heating of the rotor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following pairs is/are correct? All of these open slot----- leakage flux is less closed slot----- leakage flux is high semi closed slot-----leakage flux is moderate All of these open slot----- leakage flux is less closed slot----- leakage flux is high semi closed slot-----leakage flux is moderate ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of a compensated DC series motor, the compensating winding is provided In parallel with the armature winding. In parallel with the field winding. In series with the armature winding. As a separate unit. In parallel with the armature winding. In parallel with the field winding. In series with the armature winding. As a separate unit. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature resistance of a permanent magnet dc motor is 0.8 Ohm. At no load, the motor draws 1.5 A from a supply voltage of 25 V and runs at 1500 rpm. The efficiency of the motor while it is operating on load at 1500 rpm drawing a current of 3.5 A from the same source will be 48.0%. 59.2%. 57.1%. 88.8%. 48.0%. 59.2%. 57.1%. 88.8%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines It is advisable to start a DC series motor with some load to Avoid sparking. Limit the speed. Limit the current. Limit the flux. Avoid sparking. Limit the speed. Limit the current. Limit the flux. ANSWER DOWNLOAD EXAMIANS APP
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